| 0,0 → 1,86 |
|---|
| //***************************************************************************** |
| // 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 <math.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 |
| |
| //----- Begin Code ------------------------------------------------------------ |
| #define BUFLEN 32 |
| |
| int main(void) |
| { |
| u08 i=0; |
| s16 x=0,y=0; |
| double fi; |
| s16 fia; |
| u16 fib; |
| |
| // initialize our libraries |
| // initialize the UART (serial port) |
| uartInit(); |
| uartSetBaudRate(9600); |
| // make all rprintf statements use uart for output |
| rprintfInit(uartSendByte); |
| // initialize the timer system |
| timerInit(); |
| // turn on and initialize A/D converter |
| a2dInit(); |
| // 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_DIV128); |
| |
| // 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_AREF); |
| |
| // use a2dConvert8bit(channel#) to get an 8bit a2d reading |
| // use a2dConvert10bit(channel#) to get a 10bit a2d reading |
| |
| while(1) |
| { |
| for(i=0; i<BUFLEN; i++) |
| { |
| x += a2dConvert10bit(0); |
| y += a2dConvert10bit(1); |
| } |
| x = x/BUFLEN - 512; |
| y = y/BUFLEN - 512; |
| |
| fi = atan2(y,x) * 180.0 / PI; |
| fia = floor(fi); |
| fib = floor((fi - fia)); |
| rprintf("X:%d Y:%d fi:%d.%d \r\n", x, y, fia, fib); |
| } |
| |
| return 0; |
| } |