main.cpp

00001 #define SAMPLE_RATE     750000
00002 #define LENGTH_RESULT   100
00003 
00004 #include "mbed.h"
00005 #include "adc.h"
00006 
00007 //Initialise ADC to maximum SAMPLE_RATE and cclk divide set to 1
00008 ADC adc(SAMPLE_RATE, 1);
00009 
00010 Serial uart(USBTX, USBRX);  // tx, rx
00011 volatile int result[LENGTH_RESULT];
00012 
00013 int main() {
00014     // Init UART
00015 //    uart.baud(256000);
00016 //    uart.printf("Requested max sample rate is %u, actual max sample rate is %u.\n", SAMPLE_RATE, adc.actual_sample_rate());
00017 
00018     //Set up ADC on pin 20
00019     adc.setup(p20,1);
00020     //Measure pin 20
00021     adc.select(p20);    
00022 
00023     // Vars
00024     
00025        int count;
00026      // Program
00027     
00028     // AD conversion
00029     for(count = 0; count < LENGTH_RESULT; count++){
00030         //Start ADC conversion
00031         adc.start();
00032         //Wait for it to complete
00033         while(!adc.done(p20));
00034         result[count] = adc.read(p20); 
00035     }
00036     // Send over UART
00037     for(count = 0; count < LENGTH_RESULT; count++){      
00038         uart.printf("%04u.\n", result[count]);
00039     }
00040 }
00041 
00042 
00043