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kaklik |
1 |
// Change the following to change the clock frequency
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#define CRYSTAL_FREQ 16000000
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// Change the following to change between 16 or 20 column display
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#define DISPLAY_COLS 20
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// Speed units are "1" (nautical knots), "2" (metric kph), or "3" (statute mph)
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#define SPEED_UNITS 1
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/****************************************************************************
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GPS18.c
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10 |
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This program receives NMEA-0183 data from a GPS and displays it.
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Meant for large display version still in 16F876.
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Three buttons
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Automicaly resets if main loop stops (not the best solution, still don't know why it's stopping)
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Next: don't display GPS screens unless GPS is active
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detect display needing reset
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preset data eeprom for first-time operation
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don't display init stuff if reseting from main loop
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+5 +5+5
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| | |
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20 15 2
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---------- ----------
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~SerIn -----18-| |-24-----11-|DB4 A Vdd |
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| |-25-----12-|DB5 |
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ADC0 ------2-| |-26-----13-|DB6 |
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ADC1 ------3-| 16F876 |-27-----14-|DB7 Vo| 3--
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ADC2 ------5-| | | LCD | |
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| |-14------6-|EN | |
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XTAL--9-| |-15------4-|R/S | |
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XTAL-10-| |-28-FET-16-|K | |
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| | | RW Vss | |
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BUTTON 1---21-| | ---------- |
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BUTTON 2---22-| | 1 5 |
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BUTTON 3---23-| | | | |
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| | Gnd Gnd |
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| | |
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| |-11----------R/C-----------
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----------
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8 19
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Gnd Gnd
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***************************************************************************/
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#case
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#include <16F876.h>
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#include <jonsinc.h>
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#device = *=16 ADC=10 /* allow RAM addresses over 255 */
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#if ( ( CRYSTAL_FREQ < 4000000) || ( CRYSTAL_FREQ > 20000000 ) )
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#error "CRYSTAL FREQ" not defined to between 8000000 and 20000000
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#endif
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#if ( ( DISPLAY_COLS != 16 ) && ( DISPLAY_COLS != 20 ) )
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#error "DISPLAY COLS" not defined to 16 or 20
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#endif
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// RMC_TIME = 1 per clock megahertz, rounded
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#define RMC_TIME CRYSTAL_FREQ/1000000
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#define LCD_D0 PIN_B3
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#define LCD_D1 PIN_B4
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#define LCD_D2 PIN_B5
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#define LCD_D3 PIN_B6
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#define LCD_EN PIN_C3
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#define LCD_RS PIN_C4
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#define RX_IN PIN_C7
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#define BUTTON_1 PIN_B0
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#define BUTTON_2 PIN_B1
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#define BUTTON_3 PIN_B2
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#define LCD_BACKLITE PIN_B7
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#define LINE_1 0x00
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#define LINE_2 0x40
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#if DISPLAY_COLS == 20
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#define LINE_3 0x14
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#define LINE_4 0x54
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#endif
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#if DISPLAY_COLS == 16
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#define LINE_3 0x10
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#define LINE_4 0x50
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#endif
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#define CLEAR_DISP 0x01
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#define EOF 0x00
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#define COMMA ','
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#define CR 13
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#define SPACE ' '
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#define PERIOD '.'
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#define DEGREE 0xdf
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#define DOLLAR '$'
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#define NULL 0
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#define GPRMC_CODE 75
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#define GPRMB_CODE 74
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#define RX_BUFFER_SIZE 70
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#define POSITION_SCREEN 1
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#define WAYPOINT_SCREEN 2
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#define BATTERY_SCREEN 3
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#define HIDDEN_RMC 5
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#define WARNING_MSG 0
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#define NODATA_MSG 1
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#define ACTIVITY_SYMBOL 0xFF
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#define MAX_VOLTS 15
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#define EEPROM_CONTRAST 0
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#define EEPROM_INITIAL 1
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108 |
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/* Set the following define to "YES" to display XOR'ed GPS sentence code */
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/* such as GPRMC and the display will read out the value of 74. */
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#define GET_GPS_CODE NO
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112 |
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113 |
#separate void Display ( void );
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#separate void LCD_Init ( void );
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#separate void LCD_SetPosition ( unsigned int cX );
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116 |
#separate void LCD_PutChar ( unsigned int cX );
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#separate void LCD_PutCmd ( unsigned int cX );
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#separate void LCD_PulseEnable ( void );
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#separate void LCD_SetData ( unsigned int cX );
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#separate void SkipField ( char cCnt );
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#separate char GetField ( void );
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#separate void InitRxBuffer ( char cCode );
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#separate char GetRxChar ( void );
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#separate void DisplayLatLon ( void );
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#separate void DisplayWaypoint ( void );
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#separate void DisplayLatitude ( char cLine );
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#separate void DisplayLongitude ( char cLine );
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#separate void DisplayHeading ( char cLine );
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#separate void DisplaySpeed ( char cLine );
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#separate void DisplaySteer ( char cLine, char cX );
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#separate void DisplayWaypointName ( char cLine, char cX );
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#separate void DisplayDistance ( char cLine, char cX );
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#separate void DisplayBearing ( char cLine, char cX );
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#separate void GetUtcAndMagVar ( void );
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#separate long TrueToMag ( long iH );
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#separate long FieldFiveToLong ( void );
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#separate void DisplayAnalog ( void );
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#separate void DisplayScaledVoltage ( long iV, char cScale );
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#separate void DisplayArrival ( char cLine );
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#separate void DisplayMessage ( char cMsgNum );
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#separate void DisplayTemplateLatLon ( void );
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#separate void DisplayTemplateWaypoint ( void );
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#separate void DisplayTemplateAnalog ( void );
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#separate void Delay5mS ( char cCnt );
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#fuses HS, NOPROTECT, PUT, NOWDT, BROWNOUT, NOLVP, NOCPD
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#use standard_io ( A )
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#use standard_io ( B )
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#use standard_io ( C )
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#use delay ( clock = CRYSTAL_FREQ )
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#use rs232 ( baud=4800, xmit=PIN_C6, rcv=PIN_C7, ERRORS ) // XMIT must be assigned to enable hardward USART
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#priority RDA, RTCC, EXT
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153 |
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static char cC [ 10 ]; // local buffer
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static char cTimeOut;
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static char cRxBuffer [ RX_BUFFER_SIZE ]; // Fifo
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static char cRxByteCnt; // Number of bytes in the recv fifo
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static char *cRxBufferWritePtr; // Pointers for the Rx buffer
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static char *cRxBufferReadPtr;
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static char cRxIsrState, cRxMsgTypeReceived, cRxMsgTypeDesired;
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static char cRxMsgReady, cReceiveFlag;
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static long iVar, iLastRange, iTimeOut;
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static char cVarDir, cScreenChanged, cAdcDone;
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static char cButtonPressed, cSkip, cButtonCount;
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static char cScreen, cSavedScreen, cRmcTimer1, cRmcTimer2;
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static char cToFrom [ 5 ], cIndicator, cIllumination, cRxErrorFlag;
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static char cDone, cContrast;
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/*******************************************************************/
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#int_ad
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void AdcInterrupt ( void )
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{
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/* Gets here when ADC is done conversion, sets flag */
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cAdcDone = YES;
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}
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#int_timer1
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void Timer1Interrupt ( void )
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{
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/* Periodic RMC data timer, gets here every 204mS */
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/* This routine forces RMC to run every 10 minutes to update */
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/* magnetic variation */
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if ( cRmcTimer1-- == 0 )
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{
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cRmcTimer1 = 255; // 52 seconds @ 10.240MHz
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if ( cRmcTimer2-- == 0 )
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{
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cRmcTimer2 = RMC_TIME; // triggers every 10 minutes
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cSavedScreen = cScreen; // save current screen type
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cScreen = HIDDEN_RMC; // force RMC to run
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}
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}
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}
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#int_rtcc
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void Timer0Interrupt ( void )
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{
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// Gets here every 16.4mS at 8MHz, 8.2mS at 16MHz
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199 |
// Handles data timeout and switch debounce.
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200 |
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// DATA TIMEOUT TIMER
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if ( cTimeOut != 0 )
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{
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204 |
cTimeOut--;
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}
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206 |
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207 |
// This timer is preset by the normal operating loop, unless the operating
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208 |
// loop stops looping, at which point iTimeOut finally decrements to zero
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209 |
// and resets CPU.
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210 |
if ( iTimeOut != 0 )
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211 |
{
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212 |
iTimeOut--;
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213 |
}
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214 |
else
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215 |
{
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216 |
reset_cpu(); // force reset
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217 |
}
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218 |
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219 |
if ( input ( BUTTON_2 ) == LOW ) // if button still pressed
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220 |
{
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221 |
cScreen = WAYPOINT_SCREEN;
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222 |
cSkip = YES; // skip out of anything in process
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223 |
cScreenChanged = YES; // repaint complete screen
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224 |
}
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225 |
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226 |
if ( input ( BUTTON_3 ) == LOW ) // if button still pressed
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227 |
{
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228 |
cScreen = BATTERY_SCREEN;
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229 |
cSkip = YES; // skip out of anything in process
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230 |
cScreenChanged = YES; // repaint complete screen
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231 |
}
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232 |
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233 |
// SWITCH DEBOUNCE
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234 |
if ( input ( BUTTON_1 ) == LOW ) // if button still pressed
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235 |
{
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236 |
if ( cButtonCount < 255 ) // hold at 255
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{
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238 |
cButtonCount++; // otherwise increment
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239 |
}
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240 |
}
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else // if button is unpressed
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{
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243 |
if ( cButtonCount > 2 ) // filter out glitches
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244 |
{
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245 |
//If button press is greater than 3.3 seconds, cold reset
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246 |
if ( cButtonCount == 255 )
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247 |
{
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248 |
reset_cpu();
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249 |
}
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250 |
if ( ( cButtonCount > 57 ) && ( cButtonCount < 255 ) )
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251 |
{
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252 |
if ( cScreen != HIDDEN_RMC ) // if not in the middle of getting magnetic variation
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253 |
{
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254 |
// cIllumination ^= ON;
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output_bit ( LCD_BACKLITE, cIllumination ^= ON );
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256 |
}
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257 |
}
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258 |
// If button press is less than 0.5 second
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259 |
if ( cButtonCount <= 57 )
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260 |
{
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261 |
if ( cScreen != HIDDEN_RMC ) // if not in the middle of getting magnetic variation
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262 |
{
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263 |
//if ( cScreen++ >= BATTERY_SCREEN ) // increment to next screen
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264 |
{
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265 |
cScreen = POSITION_SCREEN; // wrap
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266 |
}
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267 |
cSkip = YES; // skip out of anything in process
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268 |
cScreenChanged = YES; // repaint complete screen
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269 |
}
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270 |
}
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271 |
}
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272 |
cButtonCount = 0; // restart
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273 |
}
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274 |
}
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275 |
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276 |
#int_rda
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277 |
void SerialInterrupt ( void )
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278 |
{
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279 |
/*
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280 |
Reads incoming data from the USART and puts in in a rolling buffer
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281 |
( but in this application, it should never roll.)
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282 |
If the buffer is full, this routine just discards the received byte.
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283 |
Not checking the LRC byte at the end of the NMEA-0183 sentence.
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284 |
*/
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285 |
char cChar;
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286 |
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287 |
if ( rs232_errors & 0x04 ) // get framing error bit from Rx status reg
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288 |
{
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289 |
cRxErrorFlag = ON;
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290 |
}
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291 |
cChar = getchar(); // get char from UART, clear any errors
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292 |
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293 |
if ( cRxByteCnt == RX_BUFFER_SIZE ) // is recv fifo full ???
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294 |
{
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295 |
goto done;
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296 |
}
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297 |
switch ( cRxIsrState )
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298 |
{
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299 |
case 0:
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300 |
{
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301 |
if ( cChar == DOLLAR ) // if start of NMEA0183 message
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302 |
{
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303 |
cRxByteCnt = 0; // reset byte count
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304 |
cReceiveFlag = OFF; // default to off
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305 |
cRxMsgTypeReceived = NULL; // set hashed value to null
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306 |
cRxIsrState++; // next state
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307 |
}
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308 |
break;
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309 |
}
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310 |
case 1: // five type characters to obtain
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311 |
case 2:
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312 |
case 3:
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313 |
case 4:
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314 |
case 5:
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315 |
{
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316 |
cRxMsgTypeReceived ^= cChar; // hash in msg type
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317 |
if ( cRxIsrState++ == 5 ) // if time to check message type
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318 |
{
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319 |
if ( cRxMsgTypeReceived == cRxMsgTypeDesired ) // if good
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320 |
{
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321 |
cReceiveFlag = YES; // enable receiving
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322 |
cRxBufferWritePtr = cRxBuffer; // reset to beginning of buffer
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323 |
}
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324 |
else // don't want this message
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325 |
{
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326 |
cRxIsrState = 0; // reset to look for next msg
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327 |
}
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328 |
}
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329 |
break;
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330 |
}
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331 |
case 6:
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332 |
{
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333 |
/* Case 6 skips the comma character following msg type */
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334 |
cRxIsrState++;
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335 |
break;
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336 |
}
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337 |
default: // remainder of characters
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338 |
{
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339 |
if ( cReceiveFlag == YES ) // if this message is wanted
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340 |
{
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341 |
*cRxBufferWritePtr = cChar; // put char in fifo
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342 |
cRxBufferWritePtr++; // increment pointer
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343 |
if ( cRxBufferWritePtr == ( cRxBuffer + RX_BUFFER_SIZE ) ) // pointer past end ?
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344 |
{
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345 |
cRxBufferWritePtr = cRxBuffer; // set pointer to start of fifo
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346 |
}
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347 |
cRxByteCnt++; // Increment byte count
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348 |
if ( cChar == CR )
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349 |
{
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350 |
cRxMsgReady = YES; // signal that message is ready
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351 |
cReceiveFlag = NO; // no more receive
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352 |
}
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353 |
}
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354 |
}
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355 |
}
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356 |
done:;
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357 |
}
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358 |
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359 |
/*******************************************************************/
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360 |
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361 |
void main ( void )
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362 |
{
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363 |
char cX;
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364 |
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365 |
iTimeOut = 65535; // default to very long to get by init
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366 |
/* INITIALIZE */
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367 |
output_float ( RX_IN ); // ensure Rx input is HiZ
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368 |
output_float ( BUTTON_1 ); // ensure switch input is HiZ
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369 |
output_float ( BUTTON_2 ); // ensure switch input is HiZ
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370 |
output_float ( BUTTON_3 ); // ensure switch input is HiZ
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371 |
output_low ( LCD_BACKLITE ); // turn off backlighting
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372 |
port_b_pullups ( ON ); // enable pullups on switches
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373 |
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374 |
// GET SAVED SETTINGS
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375 |
cContrast = read_eeprom ( EEPROM_CONTRAST ); // get stored value
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376 |
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377 |
// PWM is for display contrast
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378 |
setup_ccp2 ( CCP_PWM ); // set for PWM mode
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379 |
//The cycle time will be (1/clock)*4*t2div*(period+1)
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380 |
// 1/8000000 * 4 * 1 * 128 = 51.2uS = 19.5KHz
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381 |
setup_timer_2 ( T2_DIV_BY_1, 255, 1 ); // set PWM period
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382 |
// duty cycle = value*(1/clock)*t2div
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383 |
// 10 * 1/8000000 * 1 = 1.2uS
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384 |
set_pwm2_duty ( cContrast ); // set contrast duty cycle
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385 |
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386 |
// SETUP TIMER 0
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387 |
// Need 8-bit Timer0 to roll over every 13mS, approximately.
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388 |
// Roll time = 256 * 1 / ( clock_freq / prescaler setting / 4 )
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389 |
#if CRYSTAL_FREQ >= 15000000
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390 |
setup_counters ( RTCC_INTERNAL, RTCC_DIV_256 ); // ~13mS timer wrap
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391 |
#elif CRYSTAL_FREQ >= 8000000
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392 |
setup_counters ( RTCC_INTERNAL, RTCC_DIV_128 ); // ~13mS timer wrap
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393 |
#elif CRYSTAL_FREQ < 8000000
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394 |
setup_counters ( RTCC_INTERNAL, RTCC_DIV_64 ); // ~13mS timer wrap
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395 |
#endif
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396 |
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397 |
// Timer 1 roll time = 65536 * 1 / ( clock_freq / prescaler setting / 4 )
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398 |
setup_timer_1 ( T1_INTERNAL | T1_DIV_BY_8 ); // 16-bit timer
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399 |
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400 |
setup_adc_ports ( RA0_RA1_RA3_ANALOG ); /* these three statements set up the ADC */
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401 |
setup_adc ( ADC_CLOCK_INTERNAL );
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402 |
cIllumination = OFF;
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403 |
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404 |
LCD_Init(); // set up LCD for 4-wire bus, etc.
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405 |
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406 |
/* INIT MESSAGE */
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407 |
#if ( DISPLAY_COLS == 20 )
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408 |
LCD_SetPosition ( LINE_1 + 0 );
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409 |
printf ( LCD_PutChar, " Northern Light " ); // welcome screen
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410 |
LCD_SetPosition ( LINE_2 + 2 );
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411 |
printf ( LCD_PutChar, "Monitor/Repeater" );
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412 |
LCD_SetPosition ( LINE_3 + 3 );
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413 |
printf ( LCD_PutChar, "v18 06/21/03" );
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414 |
LCD_SetPosition ( LINE_4 + 5 );
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415 |
printf ( LCD_PutChar, "c Jon Fick" );
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416 |
#elif ( DISPLAY_COLS == 16 )
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417 |
LCD_SetPosition ( LINE_1 + 0);
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418 |
printf ( LCD_PutChar, " Northern Light " ); // welcome screen
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419 |
LCD_SetPosition ( LINE_2 + 2 );
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420 |
printf ( LCD_PutChar, "GPS Repeater" );
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421 |
LCD_SetPosition ( LINE_3 + 1 );
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422 |
printf ( LCD_PutChar, "v18 06/21/03" );
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423 |
LCD_SetPosition ( LINE_4 + 3 );
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424 |
printf ( LCD_PutChar, "c Jon Fick" );
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425 |
#endif
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426 |
delay_ms ( 1000 );
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427 |
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428 |
/* INSTRUCTION MESSAGE */
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429 |
LCD_PutCmd ( CLEAR_DISP );
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430 |
LCD_SetPosition ( LINE_1 + 0 );
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431 |
printf ( LCD_PutChar, "BUTTONS:" );
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432 |
LCD_SetPosition ( LINE_2 + 0 );
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433 |
printf ( LCD_PutChar, "<-- Lat/Lon" );
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434 |
LCD_SetPosition ( LINE_3 + 0 );
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435 |
printf ( LCD_PutChar, "<-- Waypoint" );
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436 |
LCD_SetPosition ( LINE_4 + 0 );
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437 |
printf ( LCD_PutChar, "<-- Battery" );
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438 |
delay_ms ( 2000 );
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439 |
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440 |
/* SETUP MODE */
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441 |
if ( input ( BUTTON_1 ) == LOW ) // if button is pressed
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442 |
{
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443 |
LCD_PutCmd ( CLEAR_DISP );
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444 |
LCD_SetPosition ( LINE_1 + 0 );
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445 |
printf ( LCD_PutChar, "Set contrast:" );
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446 |
LCD_SetPosition ( LINE_2 + 0 );
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447 |
printf ( LCD_PutChar, "<-- More" );
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448 |
LCD_SetPosition ( LINE_3 + 0 );
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449 |
printf ( LCD_PutChar, "<-- DONE" );
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450 |
LCD_SetPosition ( LINE_4 + 0 );
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451 |
printf ( LCD_PutChar, "<-- Less" );
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452 |
while ( input ( BUTTON_1 ) == LOW ); // wait for switch to be released after entering SETUP mode
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453 |
cContrast = 120; // start at full contrast
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454 |
cDone = NO;
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455 |
while ( cDone == NO )
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456 |
{
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457 |
set_pwm2_duty ( cContrast ); // update contrast
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458 |
if ( input ( BUTTON_1 ) == LOW )
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459 |
{
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460 |
if ( cContrast > 0 )
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461 |
{
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462 |
cContrast--; // more
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463 |
}
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464 |
}
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465 |
if ( input ( BUTTON_2 ) == LOW )
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466 |
{
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467 |
cDone = YES; // done
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468 |
}
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469 |
if ( input ( BUTTON_3 ) == LOW )
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470 |
{
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471 |
if ( cContrast < 255 )
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472 |
{
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473 |
cContrast++; // less
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474 |
}
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475 |
}
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476 |
delay_ms ( 30 ); // autorepeat
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477 |
}
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478 |
write_eeprom ( EEPROM_CONTRAST, cContrast ); // save CONTRAST to EEPROM
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479 |
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480 |
LCD_PutCmd ( CLEAR_DISP );
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481 |
LCD_SetPosition ( LINE_2 + 0 );
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482 |
printf ( LCD_PutChar, "<- Press initial" );
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483 |
LCD_SetPosition ( LINE_3 + 0 );
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484 |
printf ( LCD_PutChar, " bootup screen" );
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485 |
while ( input ( BUTTON_1 ) == LOW ); // wait until button not pressed
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486 |
cX = POSITION_SCREEN;
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487 |
while ( TRUE )
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488 |
{
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489 |
LCD_SetPosition ( LINE_4 + 3 );
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490 |
switch ( cX )
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491 |
{
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492 |
case POSITION_SCREEN:
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493 |
{
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494 |
printf ( LCD_PutChar, "POSITION " );
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495 |
break;
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496 |
}
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497 |
case WAYPOINT_SCREEN:
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498 |
{
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499 |
printf ( LCD_PutChar, "WAYPOINT " );
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500 |
break;
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501 |
}
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502 |
case BATTERY_SCREEN:
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503 |
{
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504 |
printf ( LCD_PutChar, "BATTERY " );
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505 |
break;
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506 |
}
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507 |
}
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508 |
delay_ms ( 750 );
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509 |
if ( input ( BUTTON_1 ) == LOW ) // if button is pressed
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510 |
{
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511 |
write_eeprom ( EEPROM_INITIAL, cX ); // save screen number to EEPROM
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512 |
break;
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513 |
}
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514 |
if ( cX++ == BATTERY_SCREEN )
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515 |
{
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516 |
cX = POSITION_SCREEN;
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517 |
}
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518 |
}
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519 |
LCD_PutCmd ( CLEAR_DISP );
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520 |
}
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521 |
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522 |
/* This IF/ENDIF is a tool for getting the $GP... codes */
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523 |
/* that are used in the switch/case in the main loop. */
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524 |
#if ( GET_GPS_CODE == YES )
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525 |
printf ( LCD_PutChar, "%u", 'G'^'P'^'R'^'M'^'B');
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526 |
while ( TRUE );
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527 |
#endif
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528 |
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529 |
/* INTERRUPTS */
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530 |
ext_int_edge ( H_TO_L ); // set falling edge ext interrupt
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531 |
enable_interrupts ( INT_TIMER1 ); // enable Timer1 interrupt
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532 |
enable_interrupts ( INT_RDA ); // enable serial interrupt
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533 |
enable_interrupts ( INT_RTCC ); // enable Timer0 interrupt
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534 |
enable_interrupts ( INT_AD ); // enable ADC interrupt
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535 |
enable_interrupts ( GLOBAL ); // enable all interrupts
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536 |
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537 |
/* VARIABLES */
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538 |
iVar = NULL; // default, no variation yet
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539 |
cVarDir = SPACE; // default, no variation yet
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540 |
cRmcTimer1 = 255; // initialize to 52 seconds
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541 |
cRmcTimer2 = RMC_TIME; // trigger forced RMC after 10 minutes
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542 |
cScreen = HIDDEN_RMC; // default screen, get magnetic variation first
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543 |
cSavedScreen = read_eeprom ( EEPROM_INITIAL ); // restore initial screen
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544 |
iLastRange = 65535; // make max by default
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545 |
strcpy ( cToFrom, " " ); // blank by default
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546 |
cScreenChanged = YES;
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547 |
cIndicator = 0;
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548 |
cButtonCount = 0;
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549 |
cButtonPressed = NO;
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550 |
cRxErrorFlag = OFF;
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551 |
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552 |
/* MAIN LOOP */
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553 |
while ( TRUE )
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554 |
{
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|
555 |
cTimeOut = 188; // 231 * 0.013mS = 3 seconds
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556 |
switch ( cScreen )
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557 |
{
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558 |
case HIDDEN_RMC:
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559 |
{
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|
560 |
InitRxBuffer( GPRMC_CODE ); // set code and turn on serial interrupt
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561 |
while ( ( cRxMsgReady == NO ) && ( cTimeOut != 0 ) );
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562 |
disable_interrupts ( INT_RDA ); // ignore rest of messages
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563 |
if ( cTimeOut != 0 ) // if not timed out
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564 |
{
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565 |
GetUtcAndMagVar(); // get and store the magnetic variation
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|
566 |
}
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567 |
cScreen = cSavedScreen; // revert to previous screen
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568 |
break;
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|
569 |
}
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570 |
case POSITION_SCREEN:
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|
571 |
{
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572 |
if ( cScreenChanged == YES )
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573 |
{
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|
574 |
disable_interrupts ( INT_RDA );
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|
575 |
cScreenChanged = NO;
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576 |
cSkip = NO;
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577 |
LCD_PutCmd ( CLEAR_DISP );
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|
578 |
DisplayTemplateLatLon();
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|
579 |
enable_interrupts ( INT_RDA );
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580 |
}
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|
581 |
InitRxBuffer( GPRMC_CODE ); // set code and turn on serial interrupt
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|
582 |
while ( ( cRxMsgReady == NO ) && ( cTimeOut != 0 ) && ( cScreenChanged != YES ) );
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|
583 |
disable_interrupts ( INT_RDA ); // ignore rest of messages
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|
584 |
if ( cScreenChanged == NO )
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|
585 |
{
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|
586 |
if ( cTimeOut != 0 )
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587 |
{
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|
588 |
DisplayLatLon();
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|
589 |
}
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|
590 |
else
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|
591 |
{
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|
592 |
DisplayMessage ( NODATA_MSG );
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|
593 |
}
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|
594 |
}
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|
595 |
cRxErrorFlag = OFF;
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|
596 |
break;
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597 |
}
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|
598 |
case WAYPOINT_SCREEN:
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|
599 |
{
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|
600 |
if ( cScreenChanged == YES )
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|
601 |
{
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|
602 |
disable_interrupts ( INT_RDA );
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|
603 |
cScreenChanged = NO;
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|
604 |
cSkip = NO;
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|
605 |
LCD_PutCmd ( CLEAR_DISP );
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|
606 |
DisplayTemplateWaypoint();
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|
607 |
enable_interrupts ( INT_RDA );
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|
608 |
}
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|
609 |
cSkip = NO;
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|
610 |
InitRxBuffer( GPRMB_CODE ); // set code and turn on serial interrupt
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|
611 |
while ( ( cRxMsgReady == NO ) && ( cTimeOut != 0 ) && ( cScreenChanged != YES ) );
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|
612 |
disable_interrupts ( INT_RDA ); // ignore rest of messages
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|
613 |
if ( cScreenChanged == NO )
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|
614 |
{
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|
615 |
if ( cTimeOut != 0 )
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|
616 |
{
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|
617 |
DisplayWaypoint();
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|
618 |
}
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|
619 |
else
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|
620 |
{
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|
621 |
DisplayMessage ( NODATA_MSG );
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|
622 |
}
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|
623 |
}
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|
624 |
break;
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|
625 |
}
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|
626 |
case BATTERY_SCREEN:
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|
627 |
{
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|
628 |
if ( cScreenChanged == YES )
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|
629 |
{
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|
630 |
disable_interrupts ( INT_RDA );
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|
631 |
cScreenChanged = NO;
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|
632 |
cSkip = NO;
|
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|
633 |
LCD_PutCmd ( CLEAR_DISP );
|
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|
634 |
DisplayTemplateAnalog();
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|
635 |
}
|
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|
636 |
DisplayAnalog();
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|
637 |
break;
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|
638 |
}
|
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|
639 |
}
|
|
|
640 |
|
|
|
641 |
// Preset timeout counter each loop; RTCC interrupt decrements, resets if zero is reached
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|
642 |
iTimeOut = 2000; // ~ 30 seconds
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|
643 |
|
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|
644 |
/* Flashing activity indicator in lower right of screen. */
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|
645 |
cIndicator ^= 1;
|
|
|
646 |
#if ( DISPLAY_COLS == 20 )
|
|
|
647 |
LCD_SetPosition ( LINE_4 + 19 );
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|
|
648 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
649 |
LCD_SetPosition ( LINE_4 + 15 );
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|
650 |
#endif
|
|
|
651 |
if ( cIndicator == 1 )
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|
|
652 |
{
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|
653 |
printf ( LCD_PutChar, "%c", ACTIVITY_SYMBOL );
|
|
|
654 |
}
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|
655 |
else
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|
656 |
{
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|
|
657 |
printf ( LCD_PutChar, " " );
|
|
|
658 |
}
|
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|
659 |
}
|
|
|
660 |
}
|
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|
661 |
|
|
|
662 |
#separate void DisplayTemplateLatLon ( void )
|
|
|
663 |
{
|
|
|
664 |
LCD_SetPosition ( LINE_1 );
|
|
|
665 |
printf ( LCD_PutChar, "LAT" );
|
|
|
666 |
LCD_SetPosition ( LINE_2 );
|
|
|
667 |
printf ( LCD_PutChar, "LON" );
|
|
|
668 |
LCD_SetPosition ( LINE_3 );
|
|
|
669 |
#if ( DISPLAY_COLS == 20 )
|
|
|
670 |
printf ( LCD_PutChar, "SPEED" );
|
|
|
671 |
LCD_SetPosition ( LINE_4 );
|
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|
672 |
printf ( LCD_PutChar, "HEADING" );
|
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|
673 |
#elif ( DISPLAY_COLS == 16 )
|
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|
674 |
printf ( LCD_PutChar, "SPD" );
|
|
|
675 |
LCD_SetPosition ( LINE_4 );
|
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|
676 |
printf ( LCD_PutChar, "HDG" );
|
|
|
677 |
#endif
|
|
|
678 |
}
|
|
|
679 |
|
|
|
680 |
#separate void DisplayTemplateWaypoint ( void )
|
|
|
681 |
{
|
|
|
682 |
LCD_SetPosition ( LINE_1 );
|
|
|
683 |
#if ( DISPLAY_COLS == 20 )
|
|
|
684 |
printf ( LCD_PutChar, "WAYPOINT" );
|
|
|
685 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
686 |
printf ( LCD_PutChar, "WAYPT" );
|
|
|
687 |
#endif
|
|
|
688 |
LCD_SetPosition ( LINE_2 );
|
|
|
689 |
printf ( LCD_PutChar, "STEER" );
|
|
|
690 |
LCD_SetPosition ( LINE_3 );
|
|
|
691 |
printf ( LCD_PutChar, "DIST" );
|
|
|
692 |
LCD_SetPosition ( LINE_4 );
|
|
|
693 |
printf ( LCD_PutChar, "BEARING" );
|
|
|
694 |
}
|
|
|
695 |
|
|
|
696 |
#separate void DisplayTemplateAnalog ( void )
|
|
|
697 |
{
|
|
|
698 |
#if ( DISPLAY_COLS == 20 )
|
|
|
699 |
LCD_SetPosition ( LINE_1 + 3 );
|
|
|
700 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
701 |
LCD_SetPosition ( LINE_1 + 1 );
|
|
|
702 |
#endif
|
|
|
703 |
printf ( LCD_PutChar, "BATTERY STATUS" );
|
|
|
704 |
#if ( DISPLAY_COLS == 20 )
|
|
|
705 |
LCD_SetPosition ( LINE_2 );
|
|
|
706 |
printf ( LCD_PutChar, "Primary" );
|
|
|
707 |
LCD_SetPosition ( LINE_3 );
|
|
|
708 |
printf ( LCD_PutChar, "Secondary" );
|
|
|
709 |
LCD_SetPosition ( LINE_4 );
|
|
|
710 |
printf ( LCD_PutChar, "Refrigerator" );
|
|
|
711 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
712 |
LCD_SetPosition ( LINE_2 );
|
|
|
713 |
printf ( LCD_PutChar, "Main#1 " );
|
|
|
714 |
LCD_SetPosition ( LINE_3 );
|
|
|
715 |
printf ( LCD_PutChar, "Main#2 " );
|
|
|
716 |
LCD_SetPosition ( LINE_4 );
|
|
|
717 |
printf ( LCD_PutChar, "Refrig " );
|
|
|
718 |
#endif
|
|
|
719 |
}
|
|
|
720 |
|
|
|
721 |
#separate void DisplayLatLon ( void )
|
|
|
722 |
{
|
|
|
723 |
SkipField ( 1 ); // skip UTC
|
|
|
724 |
GetField(); // A = OK, V = warning
|
|
|
725 |
if ( ( cC [ 0 ] == 'A' ) && ( !cSkip ) )
|
|
|
726 |
{
|
|
|
727 |
GetField(); // LAT
|
|
|
728 |
if ( !cSkip )
|
|
|
729 |
{
|
|
|
730 |
DisplayLatitude ( LINE_1 );
|
|
|
731 |
}
|
|
|
732 |
GetField(); // LON
|
|
|
733 |
if ( !cSkip )
|
|
|
734 |
{
|
|
|
735 |
DisplayLongitude ( LINE_2 );
|
|
|
736 |
}
|
|
|
737 |
GetField(); // SPEED
|
|
|
738 |
if ( !cSkip )
|
|
|
739 |
{
|
|
|
740 |
DisplaySpeed ( LINE_3 );
|
|
|
741 |
}
|
|
|
742 |
GetField(); // HEADING
|
|
|
743 |
if ( !cSkip )
|
|
|
744 |
{
|
|
|
745 |
DisplayHeading ( LINE_4 );
|
|
|
746 |
}
|
|
|
747 |
}
|
|
|
748 |
else
|
|
|
749 |
{
|
|
|
750 |
DisplayMessage( WARNING_MSG );
|
|
|
751 |
}
|
|
|
752 |
}
|
|
|
753 |
|
|
|
754 |
#separate void DisplayWaypoint ( void )
|
|
|
755 |
{
|
|
|
756 |
char cX;
|
|
|
757 |
|
|
|
758 |
GetField(); // A = OK, V = warning
|
|
|
759 |
if ( ( cC [ 0 ] == 'A' ) && ( !cSkip ) )
|
|
|
760 |
{
|
|
|
761 |
cX = GetField(); // XTE
|
|
|
762 |
if ( !cSkip )
|
|
|
763 |
{
|
|
|
764 |
DisplaySteer ( LINE_2, cX );
|
|
|
765 |
}
|
|
|
766 |
SkipField ( 1 ); // skip origin WP ID
|
|
|
767 |
GetField(); // DEST WP ID
|
|
|
768 |
if ( !cSkip )
|
|
|
769 |
{
|
|
|
770 |
DisplayWaypointName ( LINE_1, cX );
|
|
|
771 |
}
|
|
|
772 |
SkipField ( 4 ); // skip LAT, NS, LON, EW
|
|
|
773 |
cX = GetField(); // RANGE
|
|
|
774 |
if ( !cSkip )
|
|
|
775 |
{
|
|
|
776 |
DisplayDistance ( LINE_3, cX );
|
|
|
777 |
}
|
|
|
778 |
cX = GetField(); // BEARING
|
|
|
779 |
if ( !cSkip )
|
|
|
780 |
{
|
|
|
781 |
DisplayBearing ( LINE_4, cX );
|
|
|
782 |
}
|
|
|
783 |
SkipField ( 1 ); // skip SPEED TO DEST
|
|
|
784 |
GetField(); // ARRIVAL FLAG
|
|
|
785 |
if ( !cSkip )
|
|
|
786 |
{
|
|
|
787 |
DisplayArrival ( LINE_1 ); // overwrite RANGE if arrived
|
|
|
788 |
}
|
|
|
789 |
}
|
|
|
790 |
else
|
|
|
791 |
{
|
|
|
792 |
DisplayMessage( WARNING_MSG );
|
|
|
793 |
}
|
|
|
794 |
}
|
|
|
795 |
|
|
|
796 |
#separate void DisplayAnalog ( void )
|
|
|
797 |
{
|
|
|
798 |
long iX;
|
|
|
799 |
char cCnt;
|
|
|
800 |
|
|
|
801 |
set_adc_channel ( 0 ); // set channel
|
|
|
802 |
delay_us ( 100 ); // wait aquisition time
|
|
|
803 |
cAdcDone = NO;
|
|
|
804 |
if ( !cSkip )
|
|
|
805 |
{
|
|
|
806 |
#if ( DISPLAY_COLS == 20 )
|
|
|
807 |
LCD_SetPosition ( LINE_2 + 13 );
|
|
|
808 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
809 |
LCD_SetPosition ( LINE_2 + 8 );
|
|
|
810 |
#endif
|
|
|
811 |
DisplayScaledVoltage ( read_adc(), MAX_VOLTS );
|
|
|
812 |
printf ( LCD_PutChar, " V " );
|
|
|
813 |
}
|
|
|
814 |
set_adc_channel ( 1 );
|
|
|
815 |
delay_us ( 100 );
|
|
|
816 |
cAdcDone = NO;
|
|
|
817 |
if ( !cSkip )
|
|
|
818 |
{
|
|
|
819 |
#if ( DISPLAY_COLS == 20 )
|
|
|
820 |
LCD_SetPosition ( LINE_3 + 13 );
|
|
|
821 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
822 |
LCD_SetPosition ( LINE_3 + 8 );
|
|
|
823 |
#endif
|
|
|
824 |
DisplayScaledVoltage ( read_adc(), MAX_VOLTS );
|
|
|
825 |
printf ( LCD_PutChar, " V " );
|
|
|
826 |
}
|
|
|
827 |
set_adc_channel ( 3 );
|
|
|
828 |
delay_us ( 100 );
|
|
|
829 |
cAdcDone = NO;
|
|
|
830 |
if ( !cSkip )
|
|
|
831 |
{
|
|
|
832 |
#if ( DISPLAY_COLS == 20 )
|
|
|
833 |
LCD_SetPosition ( LINE_4 + 13 );
|
|
|
834 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
835 |
LCD_SetPosition ( LINE_4 + 8 );
|
|
|
836 |
#endif
|
|
|
837 |
DisplayScaledVoltage ( read_adc(), MAX_VOLTS );
|
|
|
838 |
printf ( LCD_PutChar, " V " );
|
|
|
839 |
}
|
|
|
840 |
Delay5mS ( 100 ); // slow loop down a bit
|
|
|
841 |
}
|
|
|
842 |
|
|
|
843 |
#separate void GetUtcAndMagVar ( void )
|
|
|
844 |
{
|
|
|
845 |
/*
|
|
|
846 |
This is a non-display version of the RMC sentence
|
|
|
847 |
to get the A/V warning, the magnetic variation, and the
|
|
|
848 |
magnetic direction.
|
|
|
849 |
*/
|
|
|
850 |
|
|
|
851 |
GetField(); // get UTC
|
|
|
852 |
GetField(); // A = OK, V = warning
|
|
|
853 |
if ( cC [ 0 ] == 'A' )
|
|
|
854 |
{
|
|
|
855 |
SkipField ( 7 ); // skip fields
|
|
|
856 |
GetField(); // MAGNETIC VARIATION
|
|
|
857 |
iVar = FieldFiveToLong(); // save to global variable, used in other sentences
|
|
|
858 |
GetField(); // EW
|
|
|
859 |
cVarDir = cC [ 0 ]; // save direction
|
|
|
860 |
}
|
|
|
861 |
else
|
|
|
862 |
{
|
|
|
863 |
iVar = NULL; // invalid
|
|
|
864 |
cVarDir = SPACE;
|
|
|
865 |
}
|
|
|
866 |
}
|
|
|
867 |
|
|
|
868 |
/******************************************************************/
|
|
|
869 |
|
|
|
870 |
#separate void DisplayScaledVoltage ( long iV, char cScale )
|
|
|
871 |
{
|
|
|
872 |
float fX;
|
|
|
873 |
|
|
|
874 |
/*
|
|
|
875 |
|
|
|
876 |
scales it to something else.
|
|
|
877 |
*/
|
|
|
878 |
while ( cAdcDone == NO ); // wait for completion by ADC interrupt
|
|
|
879 |
if ( iV == 1023 )
|
|
|
880 |
{
|
|
|
881 |
printf ( LCD_PutChar, "O/L" ); /* print it to the screen */
|
|
|
882 |
}
|
|
|
883 |
else
|
|
|
884 |
{
|
|
|
885 |
fX = ( ( float ) iV ) / 1023 * ( float ) cScale; // scale to proper range, 1023 leaves room for out-of-range
|
|
|
886 |
printf ( LCD_PutChar, "%2.1f", fX ); /* print it to the screen */
|
|
|
887 |
}
|
|
|
888 |
}
|
|
|
889 |
|
|
|
890 |
#separate void DisplayArrival ( char cLine )
|
|
|
891 |
{
|
|
|
892 |
#if ( DISPLAY_COLS == 20 )
|
|
|
893 |
LCD_SetPosition ( cLine + 11 );
|
|
|
894 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
895 |
LCD_SetPosition ( cLine + 9 );
|
|
|
896 |
#endif
|
|
|
897 |
if ( cC [ 0 ] == 'A' )
|
|
|
898 |
{
|
|
|
899 |
printf ( LCD_PutChar, "Arrived" );
|
|
|
900 |
}
|
|
|
901 |
else
|
|
|
902 |
{
|
|
|
903 |
printf ( LCD_PutChar, " " );
|
|
|
904 |
}
|
|
|
905 |
}
|
|
|
906 |
|
|
|
907 |
#separate void DisplayWaypointName ( char cLine, char cX )
|
|
|
908 |
{
|
|
|
909 |
/* Displays waypoint name, pads field with blanks */
|
|
|
910 |
char cChar, cI;
|
|
|
911 |
|
|
|
912 |
LCD_SetPosition ( cLine );
|
|
|
913 |
if ( cX != 0 )
|
|
|
914 |
{
|
|
|
915 |
printf ( LCD_PutChar, "\"" );
|
|
|
916 |
for ( cI = 0; cI < 6; cI++ )
|
|
|
917 |
{
|
|
|
918 |
cChar = cC [ cI ];
|
|
|
919 |
if ( cChar == EOF )
|
|
|
920 |
{
|
|
|
921 |
break;
|
|
|
922 |
}
|
|
|
923 |
printf ( LCD_PutChar, "%c", cChar );
|
|
|
924 |
}
|
|
|
925 |
printf ( LCD_PutChar, "\"" );
|
|
|
926 |
// Blank remainder of field
|
|
|
927 |
cChar = SPACE;
|
|
|
928 |
for ( ; cI < 6; cI++ )
|
|
|
929 |
{
|
|
|
930 |
printf ( LCD_PutChar, "%c", cChar );
|
|
|
931 |
}
|
|
|
932 |
}
|
|
|
933 |
else
|
|
|
934 |
{
|
|
|
935 |
printf ( LCD_PutChar, "- none -" );
|
|
|
936 |
}
|
|
|
937 |
}
|
|
|
938 |
|
|
|
939 |
#separate void DisplaySteer ( char cLine, char cX )
|
|
|
940 |
{
|
|
|
941 |
/*
|
|
|
942 |
Displays A.BC literals, appends 'L' or 'R'.
|
|
|
943 |
If less than 1.0, displays feet rather than nm.
|
|
|
944 |
Doesn't display distance if on track.
|
|
|
945 |
*/
|
|
|
946 |
long iX;
|
|
|
947 |
char cCnt;
|
|
|
948 |
|
|
|
949 |
if ( cX != 0 )
|
|
|
950 |
{
|
|
|
951 |
if ( ( cC [ 0 ] != '0' ) || ( cC [ 2 ] != '0' ) || ( cC [ 3 ] != '0' ) ) // if not 0.00
|
|
|
952 |
{
|
|
|
953 |
LCD_SetPosition ( cLine + 14 );
|
|
|
954 |
#if ( DISPLAY_COLS == 20 )
|
|
|
955 |
printf ( LCD_PutChar, " " ); // blank possible characters
|
|
|
956 |
LCD_SetPosition ( cLine + 11 );
|
|
|
957 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
958 |
printf ( LCD_PutChar, " " ); // blank possible characters
|
|
|
959 |
LCD_SetPosition ( cLine + 8);
|
|
|
960 |
#endif
|
|
|
961 |
if ( cC [ 0 ] == '0' ) // if less than 1.0 nm, display as feet
|
|
|
962 |
{
|
|
|
963 |
iX = ( 528 * ( long ) ( cC [ 2 ] - 0x30 ) ) + ( 52 * ( long ) ( cC [ 3 ] - 0x30 ) );
|
|
|
964 |
printf ( LCD_PutChar, "%luft ", iX );
|
|
|
965 |
}
|
|
|
966 |
else // if 1.0 nm or greater, display as nautical miles
|
|
|
967 |
{
|
|
|
968 |
printf ( LCD_PutChar, "%c%c%c%cmi ", cC [ 0 ], cC [ 1 ], cC [ 2 ] , cC [ 3 ] );
|
|
|
969 |
}
|
|
|
970 |
GetField(); // L or R
|
|
|
971 |
LCD_SetPosition ( cLine + 6 );
|
|
|
972 |
if ( cC [ 0 ] == 'L' )
|
|
|
973 |
{
|
|
|
974 |
#if ( DISPLAY_COLS == 20 )
|
|
|
975 |
printf ( LCD_PutChar, "PORT " );
|
|
|
976 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
977 |
printf ( LCD_PutChar, "L" );
|
|
|
978 |
#endif
|
|
|
979 |
}
|
|
|
980 |
else
|
|
|
981 |
{
|
|
|
982 |
#if ( DISPLAY_COLS == 20 )
|
|
|
983 |
printf ( LCD_PutChar, "STBD " );
|
|
|
984 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
985 |
printf ( LCD_PutChar, "R" );
|
|
|
986 |
#endif
|
|
|
987 |
}
|
|
|
988 |
}
|
|
|
989 |
else // if 0.00
|
|
|
990 |
{
|
|
|
991 |
#if ( DISPLAY_COLS == 20 )
|
|
|
992 |
LCD_SetPosition ( cLine + 11 );
|
|
|
993 |
printf ( LCD_PutChar, "On track " );
|
|
|
994 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
995 |
LCD_SetPosition ( cLine + 6 );
|
|
|
996 |
printf ( LCD_PutChar, " On track" );
|
|
|
997 |
#endif
|
|
|
998 |
GetField(); // dummy L or R
|
|
|
999 |
}
|
|
|
1000 |
}
|
|
|
1001 |
else
|
|
|
1002 |
{
|
|
|
1003 |
LCD_SetPosition ( cLine + 6 );
|
|
|
1004 |
printf ( LCD_PutChar, " " );
|
|
|
1005 |
}
|
|
|
1006 |
}
|
|
|
1007 |
|
|
|
1008 |
#separate void DisplayDistance ( char cLine, char cX )
|
|
|
1009 |
{
|
|
|
1010 |
/* Format: ABC.D nautical miles */
|
|
|
1011 |
char cChar, cI;
|
|
|
1012 |
long iThisRange;
|
|
|
1013 |
|
|
|
1014 |
if ( cX != 0 ) // if waypoint data to display
|
|
|
1015 |
{
|
|
|
1016 |
#if ( DISPLAY_COLS == 20 )
|
|
|
1017 |
LCD_SetPosition ( cLine + 11 );
|
|
|
1018 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
1019 |
LCD_SetPosition ( cLine + 8 );
|
|
|
1020 |
#endif
|
|
|
1021 |
cI = 0;
|
|
|
1022 |
for ( cI = 0; cI < 2; cI++ ) // find first non-zero
|
|
|
1023 |
{
|
|
|
1024 |
cChar = cC [ cI ];
|
|
|
1025 |
if ( cChar != '0' )
|
|
|
1026 |
{
|
|
|
1027 |
break;
|
|
|
1028 |
}
|
|
|
1029 |
}
|
|
|
1030 |
for ( ; cI < 5; cI++ ) // display from there on
|
|
|
1031 |
{
|
|
|
1032 |
printf ( LCD_PutChar, "%c", cC [ cI ] );
|
|
|
1033 |
}
|
|
|
1034 |
printf ( LCD_PutChar, "nm " ); // pad with blanks
|
|
|
1035 |
|
|
|
1036 |
/*
|
|
|
1037 |
The least significant character from the GPS is 0.1 nm.
|
|
|
1038 |
Multiply whole thing by 10 and make it type long.
|
|
|
1039 |
Discern if increasing (FROM) or decreasing (TO).
|
|
|
1040 |
*/
|
|
|
1041 |
iThisRange = 1000 * ( long ) ( cC [ 0 ] - 0x30 );
|
|
|
1042 |
iThisRange += 100 * ( long ) ( cC [ 1 ] - 0x30 );
|
|
|
1043 |
iThisRange += 10 * ( long ) ( cC [ 2 ] - 0x30 );
|
|
|
1044 |
iThisRange += ( long ) ( cC [ 4 ] - 0x30 );
|
|
|
1045 |
if ( iThisRange < iLastRange )
|
|
|
1046 |
{
|
|
|
1047 |
#if ( DISPLAY_COLS == 20 )
|
|
|
1048 |
strcpy ( cToFrom, "TO " );
|
|
|
1049 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
1050 |
strcpy ( cToFrom, "TO" );
|
|
|
1051 |
#endif
|
|
|
1052 |
}
|
|
|
1053 |
if ( iThisRange > iLastRange )
|
|
|
1054 |
{
|
|
|
1055 |
#if ( DISPLAY_COLS == 20 )
|
|
|
1056 |
strcpy ( cToFrom, "FROM" );
|
|
|
1057 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
1058 |
strcpy ( cToFrom, "FM" );
|
|
|
1059 |
#endif
|
|
|
1060 |
}
|
|
|
1061 |
iLastRange = iThisRange; // save this range to compare next time
|
|
|
1062 |
LCD_SetPosition ( cLine + 5 );
|
|
|
1063 |
printf ( LCD_PutChar, cToFrom );
|
|
|
1064 |
}
|
|
|
1065 |
else
|
|
|
1066 |
{
|
|
|
1067 |
LCD_SetPosition ( cLine + 5 );
|
|
|
1068 |
#if ( DISPLAY_COLS == 20 )
|
|
|
1069 |
printf ( LCD_PutChar, " " );
|
|
|
1070 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
1071 |
printf ( LCD_PutChar, " " );
|
|
|
1072 |
#endif
|
|
|
1073 |
}
|
|
|
1074 |
}
|
|
|
1075 |
|
|
|
1076 |
#separate void DisplayBearing ( char cLine, char cX )
|
|
|
1077 |
{
|
|
|
1078 |
/*
|
|
|
1079 |
Compass variation comes from RMC sentence. If RMC has not run yet
|
|
|
1080 |
then "T" is displayed after bearing.
|
|
|
1081 |
*/
|
|
|
1082 |
long iHdg;
|
|
|
1083 |
char cTrueIndicator;
|
|
|
1084 |
|
|
|
1085 |
if ( cX != 0 ) // if waypoint data to display
|
|
|
1086 |
{
|
|
|
1087 |
#if ( DISPLAY_COLS == 20 )
|
|
|
1088 |
LCD_SetPosition ( cLine + 11 );
|
|
|
1089 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
1090 |
LCD_SetPosition ( cLine + 8 );
|
|
|
1091 |
#endif
|
|
|
1092 |
iHdg = FieldFiveToLong();
|
|
|
1093 |
iHdg = TrueToMag ( iHdg ); // factor variation into heading
|
|
|
1094 |
if ( ( iVar == NULL ) || ( cVarDir == SPACE ) )
|
|
|
1095 |
{
|
|
|
1096 |
cTrueIndicator = 'T';
|
|
|
1097 |
}
|
|
|
1098 |
else
|
|
|
1099 |
{
|
|
|
1100 |
cTrueIndicator = ' ';
|
|
|
1101 |
}
|
|
|
1102 |
printf ( LCD_PutChar, "%lu%c%c ", iHdg, DEGREE, cTrueIndicator ); // pad with blanks
|
|
|
1103 |
}
|
|
|
1104 |
else
|
|
|
1105 |
{
|
|
|
1106 |
#if ( DISPLAY_COLS == 20 )
|
|
|
1107 |
LCD_SetPosition ( cLine + 11 );
|
|
|
1108 |
printf ( LCD_PutChar, " " );
|
|
|
1109 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
1110 |
LCD_SetPosition ( cLine + 8 );
|
|
|
1111 |
printf ( LCD_PutChar, " " );
|
|
|
1112 |
#endif
|
|
|
1113 |
}
|
|
|
1114 |
}
|
|
|
1115 |
|
|
|
1116 |
#separate void DisplayLatitude ( char cLine )
|
|
|
1117 |
{
|
|
|
1118 |
/* Displays latitude ABCD.EF as AB CD.EF, appends 'N' or 'S' */
|
|
|
1119 |
#if ( DISPLAY_COLS == 20 )
|
|
|
1120 |
LCD_SetPosition ( cLine + 8 );
|
|
|
1121 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
1122 |
LCD_SetPosition ( cLine + 5 );
|
|
|
1123 |
#endif
|
|
|
1124 |
if ( cC [ 0 ] == '0' )
|
|
|
1125 |
{
|
|
|
1126 |
cC [ 0 ] = SPACE;
|
|
|
1127 |
}
|
|
|
1128 |
printf ( LCD_PutChar, "%c%c%c", cC [ 0 ], cC [ 1 ], DEGREE );
|
|
|
1129 |
printf ( LCD_PutChar, "%c%c%c%c%c%c", cC [ 2 ], cC [ 3 ], cC [ 4 ], cC [ 5 ], cC [ 6 ], cC [ 7 ] );
|
|
|
1130 |
GetField(); // NS
|
|
|
1131 |
printf ( LCD_PutChar, " %c", cC [ 0 ] );
|
|
|
1132 |
}
|
|
|
1133 |
|
|
|
1134 |
#separate void DisplayLongitude ( char cLine )
|
|
|
1135 |
{
|
|
|
1136 |
/* Displays longitude ABCDE.FG as ABC DE.FG, appends 'E' or 'W' */
|
|
|
1137 |
#if ( DISPLAY_COLS == 20 )
|
|
|
1138 |
LCD_SetPosition ( cLine + 7 );
|
|
|
1139 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
1140 |
LCD_SetPosition ( cLine + 4 );
|
|
|
1141 |
#endif
|
|
|
1142 |
if ( cC [ 0 ] == '0' )
|
|
|
1143 |
{
|
|
|
1144 |
cC [ 0 ] = SPACE;
|
|
|
1145 |
}
|
|
|
1146 |
if ( cC [ 1 ] == '0' )
|
|
|
1147 |
{
|
|
|
1148 |
cC [ 1 ] = SPACE;
|
|
|
1149 |
}
|
|
|
1150 |
printf ( LCD_PutChar, "%c%c%c%c", cC [ 0 ], cC [ 1 ], cC [ 2 ], DEGREE );
|
|
|
1151 |
printf ( LCD_PutChar, "%c%c%c%c%c%c", cC [ 3 ], cC [ 4 ], cC [ 5 ], cC [ 6 ], cC [ 7 ], cC [ 8 ] );
|
|
|
1152 |
GetField(); // EW
|
|
|
1153 |
printf ( LCD_PutChar, " %c", cC [ 0 ] );
|
|
|
1154 |
}
|
|
|
1155 |
|
|
|
1156 |
#separate void DisplaySpeed ( char cLine )
|
|
|
1157 |
{
|
|
|
1158 |
float fX;
|
|
|
1159 |
|
|
|
1160 |
// Format ABC.D
|
|
|
1161 |
#if ( DISPLAY_COLS == 20 )
|
|
|
1162 |
LCD_SetPosition ( cLine + 8 );
|
|
|
1163 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
1164 |
LCD_SetPosition ( cLine + 5 );
|
|
|
1165 |
#endif
|
|
|
1166 |
fX = 100 * ( cC [ 0 ] - 0x30 );
|
|
|
1167 |
fX += 10 * ( cC [ 1 ] - 0x30 );
|
|
|
1168 |
fX += 1 * ( cC [ 2 ] - 0x30 );
|
|
|
1169 |
fX += 0.1 * ( cC [ 4 ] - 0x30 );
|
|
|
1170 |
#if SPEED_UNITS == 2
|
|
|
1171 |
fX *= 1.852; // convert knots to km/h
|
|
|
1172 |
#endif
|
|
|
1173 |
#if SPEED_UNITS == 3
|
|
|
1174 |
fX *= 1.151; // convert knots to mi/h
|
|
|
1175 |
#endif
|
|
|
1176 |
printf ( LCD_PutChar, "%3.1f ", fX ); // print it to the screen
|
|
|
1177 |
#if SPEED_UNITS == 1
|
|
|
1178 |
printf ( LCD_PutChar, "kts " ); // print it to the screen
|
|
|
1179 |
#endif
|
|
|
1180 |
#if SPEED_UNITS == 2
|
|
|
1181 |
printf ( LCD_PutChar, "kph " ); // print it to the screen
|
|
|
1182 |
#endif
|
|
|
1183 |
#if SPEED_UNITS == 3
|
|
|
1184 |
printf ( LCD_PutChar, "mph " ); // print it to the screen
|
|
|
1185 |
#endif
|
|
|
1186 |
}
|
|
|
1187 |
|
|
|
1188 |
#separate void DisplayHeading ( char cLine )
|
|
|
1189 |
{
|
|
|
1190 |
long iHdg;
|
|
|
1191 |
|
|
|
1192 |
#if ( DISPLAY_COLS == 20 )
|
|
|
1193 |
LCD_SetPosition ( cLine + 8 );
|
|
|
1194 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
1195 |
LCD_SetPosition ( cLine + 5 );
|
|
|
1196 |
#endif
|
|
|
1197 |
iHdg = FieldFiveToLong();
|
|
|
1198 |
SkipField ( 1 ); // skip fix date
|
|
|
1199 |
GetField(); // MAGNETIC VARIATION
|
|
|
1200 |
iVar = FieldFiveToLong(); // save to global variable, used in other sentences
|
|
|
1201 |
GetField(); // EW
|
|
|
1202 |
cVarDir = cC [ 0 ]; // save direction
|
|
|
1203 |
iHdg = TrueToMag ( iHdg ); // factor variation into heading
|
|
|
1204 |
printf ( LCD_PutChar, "%lu%c ", iHdg, DEGREE ); // pad with blanks
|
|
|
1205 |
}
|
|
|
1206 |
|
|
|
1207 |
#separate long FieldFiveToLong ( void )
|
|
|
1208 |
{
|
|
|
1209 |
/* Converts ABC.D to long, rounds decimal up or down */
|
|
|
1210 |
long iX;
|
|
|
1211 |
|
|
|
1212 |
iX = 100 * ( long ) ( cC [ 0 ] - 0x30 );
|
|
|
1213 |
iX += 10 * ( long ) ( cC [ 1 ] - 0x30 );
|
|
|
1214 |
iX += ( long ) ( cC [ 2 ] - 0x30 );
|
|
|
1215 |
if ( ( cC [ 3 ] == PERIOD ) && ( cC [ 4 ] >= '5' ) )
|
|
|
1216 |
{
|
|
|
1217 |
iX++; // round up
|
|
|
1218 |
}
|
|
|
1219 |
return ( iX );
|
|
|
1220 |
}
|
|
|
1221 |
|
|
|
1222 |
#separate long TrueToMag ( long iH )
|
|
|
1223 |
{
|
|
|
1224 |
/* Magnetic variation information comes from the RMC sentence */
|
|
|
1225 |
|
|
|
1226 |
if ( cVarDir == 'W' )
|
|
|
1227 |
{
|
|
|
1228 |
iH += iVar;
|
|
|
1229 |
}
|
|
|
1230 |
else
|
|
|
1231 |
{
|
|
|
1232 |
if ( iH >= iVar )
|
|
|
1233 |
{
|
|
|
1234 |
iH -= iVar; // OK as-is
|
|
|
1235 |
}
|
|
|
1236 |
else
|
|
|
1237 |
{
|
|
|
1238 |
iH = iH + 360 - iVar; // correct for below zero
|
|
|
1239 |
}
|
|
|
1240 |
}
|
|
|
1241 |
if ( iH >= 360 )
|
|
|
1242 |
{
|
|
|
1243 |
iH -= 360;
|
|
|
1244 |
}
|
|
|
1245 |
return ( iH );
|
|
|
1246 |
}
|
|
|
1247 |
|
|
|
1248 |
#separate void DisplayMessage ( char cMsgNum )
|
|
|
1249 |
{
|
|
|
1250 |
LCD_PutCmd ( CLEAR_DISP );
|
|
|
1251 |
LCD_SetPosition ( LINE_2 );
|
|
|
1252 |
switch ( cMsgNum )
|
|
|
1253 |
{
|
|
|
1254 |
case WARNING_MSG:
|
|
|
1255 |
{
|
|
|
1256 |
#if ( DISPLAY_COLS == 20 )
|
|
|
1257 |
printf ( LCD_PutChar, " GPS warning " );
|
|
|
1258 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
1259 |
printf ( LCD_PutChar, " GPS warning" );
|
|
|
1260 |
#endif
|
|
|
1261 |
break;
|
|
|
1262 |
}
|
|
|
1263 |
case NODATA_MSG:
|
|
|
1264 |
{
|
|
|
1265 |
if ( cRxErrorFlag == OFF ) // is it a framing error problem ?
|
|
|
1266 |
{
|
|
|
1267 |
#if ( DISPLAY_COLS == 20 )
|
|
|
1268 |
printf ( LCD_PutChar, " No data from GPS" );
|
|
|
1269 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
1270 |
printf ( LCD_PutChar, "No data from GPS" );
|
|
|
1271 |
#endif
|
|
|
1272 |
}
|
|
|
1273 |
else
|
|
|
1274 |
{
|
|
|
1275 |
#if ( DISPLAY_COLS == 20 )
|
|
|
1276 |
printf ( LCD_PutChar, " Baud error" );
|
|
|
1277 |
#elif ( DISPLAY_COLS == 16 )
|
|
|
1278 |
printf ( LCD_PutChar, " Baud error" );
|
|
|
1279 |
#endif
|
|
|
1280 |
cRxErrorFlag = OFF;
|
|
|
1281 |
}
|
|
|
1282 |
break;
|
|
|
1283 |
}
|
|
|
1284 |
}
|
|
|
1285 |
Delay5mS ( 255 ); // delay 1.25 seconds
|
|
|
1286 |
iVar = NULL;
|
|
|
1287 |
cVarDir = SPACE; // signal "no magnetic variation" yet
|
|
|
1288 |
cScreenChanged = YES;
|
|
|
1289 |
}
|
|
|
1290 |
|
|
|
1291 |
#separate void Delay5mS ( char cCnt )
|
|
|
1292 |
{
|
|
|
1293 |
char cX;
|
|
|
1294 |
|
|
|
1295 |
/* This variable-count 5mS delay is interruptable by a button press */
|
|
|
1296 |
for ( cX = 0; cX < cCnt; cX++ )
|
|
|
1297 |
{
|
|
|
1298 |
if ( cScreenChanged == YES )
|
|
|
1299 |
{
|
|
|
1300 |
break;
|
|
|
1301 |
}
|
|
|
1302 |
delay_ms ( 5 );
|
|
|
1303 |
}
|
|
|
1304 |
}
|
|
|
1305 |
|
|
|
1306 |
#separate char GetField ( void )
|
|
|
1307 |
{
|
|
|
1308 |
char cX, cIndex;
|
|
|
1309 |
|
|
|
1310 |
cX = NULL;
|
|
|
1311 |
cIndex = 0;
|
|
|
1312 |
while ( !cSkip )
|
|
|
1313 |
{
|
|
|
1314 |
cX = GetRxChar();
|
|
|
1315 |
if ( ( cX == COMMA ) || ( cX == CR ) )
|
|
|
1316 |
{
|
|
|
1317 |
break;
|
|
|
1318 |
}
|
|
|
1319 |
cC [ cIndex++ ] = cX;
|
|
|
1320 |
}
|
|
|
1321 |
cC [ cIndex ] = EOF;
|
|
|
1322 |
return ( cIndex ); // return number of characters in field
|
|
|
1323 |
}
|
|
|
1324 |
|
|
|
1325 |
#separate void SkipField ( char cCnt )
|
|
|
1326 |
{
|
|
|
1327 |
char cX;
|
|
|
1328 |
|
|
|
1329 |
for ( cX = 0; cX < cCnt; cX++ )
|
|
|
1330 |
{
|
|
|
1331 |
while ( GetRxChar() != COMMA );
|
|
|
1332 |
}
|
|
|
1333 |
}
|
|
|
1334 |
|
|
|
1335 |
/* RS232 FUNCTIONS ================================================== */
|
|
|
1336 |
|
|
|
1337 |
#separate void InitRxBuffer ( char cCode )
|
|
|
1338 |
{
|
|
|
1339 |
disable_interrupts ( INT_RDA );
|
|
|
1340 |
cRxBufferWritePtr = cRxBuffer; // point to beginning of buffer
|
|
|
1341 |
cRxBufferReadPtr = cRxBuffer;
|
|
|
1342 |
cRxByteCnt = 0;
|
|
|
1343 |
cRxIsrState = 0;
|
|
|
1344 |
cRxMsgReady = NO;
|
|
|
1345 |
cRxMsgTypeDesired = cCode;
|
|
|
1346 |
enable_interrupts ( INT_RDA );
|
|
|
1347 |
}
|
|
|
1348 |
|
|
|
1349 |
#separate char GetRxChar ( void )
|
|
|
1350 |
{
|
|
|
1351 |
// Get the next available byte in the recv fifo.
|
|
|
1352 |
// Call this function ONLY if the recv fifo contains data.
|
|
|
1353 |
char cValue;
|
|
|
1354 |
|
|
|
1355 |
cValue = 0;
|
|
|
1356 |
if ( cRxByteCnt > 0 ) // For safety, check if there is any data
|
|
|
1357 |
{
|
|
|
1358 |
cValue = *cRxBufferReadPtr++; // Read byte from fifo
|
|
|
1359 |
if ( cRxBufferReadPtr == ( cRxBuffer + RX_BUFFER_SIZE ) ) // Did tail ptr wrap ?
|
|
|
1360 |
{
|
|
|
1361 |
cRxBufferReadPtr = cRxBuffer; // If so, reset it to start of buffer
|
|
|
1362 |
}
|
|
|
1363 |
cRxByteCnt--; // Decrement byte count
|
|
|
1364 |
}
|
|
|
1365 |
return ( cValue );
|
|
|
1366 |
}
|
|
|
1367 |
|
|
|
1368 |
/* LCD FUNCTIONS ================================= */
|
|
|
1369 |
|
|
|
1370 |
#separate void LCD_Init ( void )
|
|
|
1371 |
{
|
|
|
1372 |
LCD_SetData ( 0x00 );
|
|
|
1373 |
delay_ms ( 200 ); /* wait enough time after Vdd rise */
|
|
|
1374 |
output_low ( LCD_RS );
|
|
|
1375 |
LCD_SetData ( 0x03 ); /* init with specific nibbles to start 4-bit mode */
|
|
|
1376 |
LCD_PulseEnable();
|
|
|
1377 |
LCD_PulseEnable();
|
|
|
1378 |
LCD_PulseEnable();
|
|
|
1379 |
LCD_SetData ( 0x02 ); /* set 4-bit interface */
|
|
|
1380 |
LCD_PulseEnable(); /* send dual nibbles hereafter, MSN first */
|
|
|
1381 |
LCD_PutCmd ( 0x2C ); /* function set (all lines, 5x7 characters) */
|
|
|
1382 |
LCD_PutCmd ( 0x0C ); /* display ON, cursor off, no blink */
|
|
|
1383 |
LCD_PutCmd ( 0x01 ); /* clear display */
|
|
|
1384 |
LCD_PutCmd ( 0x06 ); /* entry mode set, increment & scroll left */
|
|
|
1385 |
}
|
|
|
1386 |
|
|
|
1387 |
#separate void LCD_SetPosition ( unsigned int cX )
|
|
|
1388 |
{
|
|
|
1389 |
/* this subroutine works specifically for 4-bit Port A */
|
|
|
1390 |
LCD_SetData ( swap ( cX ) | 0x08 );
|
|
|
1391 |
LCD_PulseEnable();
|
|
|
1392 |
LCD_SetData ( swap ( cX ) );
|
|
|
1393 |
LCD_PulseEnable();
|
|
|
1394 |
}
|
|
|
1395 |
|
|
|
1396 |
#separate void LCD_PutChar ( unsigned int cX )
|
|
|
1397 |
{
|
|
|
1398 |
/* this subroutine works specifically for 4-bit Port A */
|
|
|
1399 |
if ( !cSkip )
|
|
|
1400 |
{
|
|
|
1401 |
output_high ( LCD_RS );
|
|
|
1402 |
LCD_SetData ( swap ( cX ) ); /* send high nibble */
|
|
|
1403 |
LCD_PulseEnable();
|
|
|
1404 |
LCD_SetData ( swap ( cX ) ); /* send low nibble */
|
|
|
1405 |
LCD_PulseEnable();
|
|
|
1406 |
output_low ( LCD_RS );
|
|
|
1407 |
}
|
|
|
1408 |
}
|
|
|
1409 |
|
|
|
1410 |
#separate void LCD_PutCmd ( unsigned int cX )
|
|
|
1411 |
{
|
|
|
1412 |
/* this subroutine works specifically for 4-bit Port A */
|
|
|
1413 |
LCD_SetData ( swap ( cX ) ); /* send high nibble */
|
|
|
1414 |
LCD_PulseEnable();
|
|
|
1415 |
LCD_SetData ( swap ( cX ) ); /* send low nibble */
|
|
|
1416 |
LCD_PulseEnable();
|
|
|
1417 |
}
|
|
|
1418 |
|
|
|
1419 |
#separate void LCD_PulseEnable ( void )
|
|
|
1420 |
{
|
|
|
1421 |
output_high ( LCD_EN );
|
|
|
1422 |
delay_us ( 3 ); // was 10
|
|
|
1423 |
output_low ( LCD_EN );
|
|
|
1424 |
delay_ms ( 3 ); // was 5
|
|
|
1425 |
}
|
|
|
1426 |
|
|
|
1427 |
#separate void LCD_SetData ( unsigned int cX )
|
|
|
1428 |
{
|
|
|
1429 |
output_bit ( LCD_D0, cX & 0x01 );
|
|
|
1430 |
output_bit ( LCD_D1, cX & 0x02 );
|
|
|
1431 |
output_bit ( LCD_D2, cX & 0x04 );
|
|
|
1432 |
output_bit ( LCD_D3, cX & 0x08 );
|
|
|
1433 |
}
|
|
|
1434 |
|