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/Designs/Data_loggers/GPSRL02A/SW/buffer/a2dtest.c |
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//***************************************************************************** |
// File Name : a2dtest.c |
// |
// Title : example usage of some avr library functions |
// Revision : 1.0 |
// Notes : |
// Target MCU : Atmel AVR series |
// Editor Tabs : 4 |
// |
// Revision History: |
// When Who Description of change |
// ----------- ----------- ----------------------- |
// 20-Oct-2002 pstang Created the program |
//***************************************************************************** |
//----- Include Files --------------------------------------------------------- |
#include <avr/io.h> // include I/O definitions (port names, pin names, etc) |
#include <avr/interrupt.h> // include interrupt support |
#include <string.h> |
#include "global.h" // include our global settings |
#include "uart.h" // include uart function library |
#include "rprintf.h" // include printf function library |
#include "timer.h" // include timer function library (timing, PWM, etc) |
#include "a2d.h" // include A/D converter function library |
#include "vt100.h" // include VT100 terminal support |
//----- Begin Code ------------------------------------------------------------ |
int main(void) |
{ |
u16 a=0; |
u08 i=0; |
// initialize our libraries |
// initialize the UART (serial port) |
uartInit(); |
// make all rprintf statements use uart for output |
rprintfInit(uartSendByte); |
// initialize the timer system |
timerInit(); |
// turn on and initialize A/D converter |
a2dInit(); |
// print a little intro message so we know things are working |
/* vt100ClearScreen(); |
vt100SetCursorPos(1,1); |
rprintf("Welcome to the a2d test!\r\n");*/ |
// configure a2d port (PORTA) as input |
// so we can receive analog signals |
DDRC = 0x00; |
// make sure pull-up resistors are turned off |
PORTC = 0x00; |
// set the a2d prescaler (clock division ratio) |
// - a lower prescale setting will make the a2d converter go faster |
// - a higher setting will make it go slower but the measurements |
// will be more accurate |
// - other allowed prescale values can be found in a2d.h |
a2dSetPrescaler(ADC_PRESCALE_DIV32); |
// set the a2d reference |
// - the reference is the voltage against which a2d measurements are made |
// - other allowed reference values can be found in a2d.h |
a2dSetReference(ADC_REFERENCE_AVCC); |
// use a2dConvert8bit(channel#) to get an 8bit a2d reading |
// use a2dConvert10bit(channel#) to get a 10bit a2d reading |
while(1) |
{ |
u08 c=0; |
u08 n,i; |
char radiace[10]; |
char radka[201]; |
for(n=0;n<=100;n++) radka[n]=0; // vynuluj bufferovaci pole |
for(n=0;n<10;n++) radiace[n]=0; // vynuluj bufferovaci pole |
n=0; |
while(1) // pockej na $ kterym zacina NMEA radka |
{ |
uartReceiveByte(&c); |
if(c == '$') break; |
} |
for(i=0;i<100;i++) // nacti maximalne 100 znaku do bufferu |
{ |
radka[n]=c; |
if(c == '\n') break; // kdyz narazis na konec radku zastav nacitani |
uartReceiveByte(&c); |
n++; |
} |
radka[n]=0; // naztav na konec retezce pro zpracovani pomoci strcat |
itoa(a2dConvert10bit(2),&radiace,10); //a2dConvert8bit(1) |
if(n != 0) |
{ |
strcat(radka, radiace); |
strcat(radka,"\r"); |
} |
n=0; |
uartFlushReceiveBuffer(); |
while (0!=radka[n]) |
{ |
uartSendByte(radka[n]); |
n++; |
timerPause(35); |
} |
} |
return 0; |
} |
Property changes: |
Added: svn:executable |
+* |
\ No newline at end of property |