main.cpp

00001 #include "mbed.h"
00002 #include "DS1820.h"
00003 
00004 DigitalOut led(LED1);
00005 
00006 #define DATA_PIN        A0
00007 #define MAX_PROBES      16
00008 DS1820* probe[MAX_PROBES];
00009 
00010 Timer t;
00011 
00012 int     DS;
00013 float   Temp[16]; 
00014 
00015 int main(){
00016 
00017     printf("\033[0m\033[2J\033[HInitialise...!\n\n");
00018 
00019     while (DS1820::unassignedProbe(DATA_PIN)) {
00020         probe[DS] = new DS1820(DATA_PIN);
00021         DS++;
00022         if (DS == MAX_PROBES) {
00023             break;
00024         }
00025     }
00026     
00027     if (!DS) {        
00028         printf("No Sensors found!\n\n");
00029         ThisThread::sleep_for(chrono::milliseconds(1000));
00030         NVIC_SystemReset();
00031     }
00032 
00033     // set each probe resolution, default is 12bit (750ms)
00034     probe[0]->setResolution(9);
00035 //    probe[0]->setResolution(10);
00036 //    probe[0]->setResolution(11);
00037 //    probe[0]->setResolution(12);
00038 //    probe[1]->setResolution(9);
00039 //    probe[2]->setResolution(10);
00040 
00041     t.start();
00042 
00043     while(1) {
00044         
00045         printf("\033[0m\033[2J\033[HDS Sensor data..\n\n");
00046 
00047         int DS_error = 0;
00048         for (int i = 0; i < DS; i++) {
00049             Temp[i] = probe[i]->temperature();
00050             if(Temp[i]==-1000) {
00051                 Temp[i] = probe[i]->temperature();  // get read temp again if error
00052                 DS_error++;
00053             }
00054             printf("Probe %d:  %3.2f %cc\r\n",i,Temp[i],0xb0);
00055         }
00056         printf("\nDS errors:  %d\n\n", DS_error);
00057 
00058         printf("Start conversion\n");
00059         t.reset();
00060         // don't wait for conversion, but do something that takes at least 750ms before reading the sensors
00061         //if(DS>0){probe[0]->convertTemperature(0, DS1820::all_devices);}
00062         
00063         // wait for conversion, can take up to 750ms(12 bit mode)
00064         if(DS>0){probe[0]->convertTemperature(1, DS1820::all_devices);}        
00065         
00066         printf("\nConvert process time: %0.6f Seconds\n", chrono::duration<float>(t.elapsed_time()).count());
00067 
00068         ThisThread::sleep_for(chrono::milliseconds(1000));
00069     }
00070 }