Paul Staron / Mbed OS DS1820-example

DS1820, DS18B20 single and multi sensor OS6 compliant. Based on Erik's original code. Tested on ST's F767 and H743 platforms. Using single and multiple sensors up to 15 meters of cable length.

Dependencies:   DS1820

main.cpp@1:1aaf20a93f36, 2020-12-29 (annotated)

Committer:
star297
Date:
Tue Dec 29 13:13:48 2020 +0000
Revision:
1:1aaf20a93f36
Parent:
0:a3c589406dc4 
DS1820 single/multi sensor OS6 compliant.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
star297 0:a3c589406dc4 1 #include "mbed.h"
star297 0:a3c589406dc4 2 #include "DS1820.h"
star297 0:a3c589406dc4 3
star297 0:a3c589406dc4 4 DigitalOut led(LED1);
star297 0:a3c589406dc4 5
star297 0:a3c589406dc4 6 #define DATA_PIN A0
star297 0:a3c589406dc4 7 #define MAX_PROBES 16
star297 0:a3c589406dc4 8 DS1820* probe[MAX_PROBES];
star297 0:a3c589406dc4 9
star297 0:a3c589406dc4 10 Timer t;
star297 0:a3c589406dc4 11
star297 0:a3c589406dc4 12 int DS;
star297 0:a3c589406dc4 13 float Temp[16];
star297 0:a3c589406dc4 14
star297 0:a3c589406dc4 15 int main(){
star297 0:a3c589406dc4 16
star297 0:a3c589406dc4 17 printf("\033[0m\033[2J\033[HInitialise...!\n\n");
star297 0:a3c589406dc4 18
star297 0:a3c589406dc4 19 while (DS1820::unassignedProbe(DATA_PIN)) {
star297 0:a3c589406dc4 20 probe[DS] = new DS1820(DATA_PIN);
star297 0:a3c589406dc4 21 DS++;
star297 0:a3c589406dc4 22 if (DS == MAX_PROBES) {
star297 0:a3c589406dc4 23 break;
star297 0:a3c589406dc4 24 }
star297 0:a3c589406dc4 25 }
star297 0:a3c589406dc4 26
star297 0:a3c589406dc4 27 if (!DS) {
star297 0:a3c589406dc4 28 printf("No Sensors found!\n\n");
star297 0:a3c589406dc4 29 ThisThread::sleep_for(chrono::milliseconds(1000));
star297 0:a3c589406dc4 30 NVIC_SystemReset();
star297 0:a3c589406dc4 31 }
star297 0:a3c589406dc4 32
star297 0:a3c589406dc4 33 // set each probe resolution, default is 12bit (750ms)
star297 0:a3c589406dc4 34 probe[0]->setResolution(9);
star297 0:a3c589406dc4 35 // probe[0]->setResolution(10);
star297 0:a3c589406dc4 36 // probe[0]->setResolution(11);
star297 0:a3c589406dc4 37 // probe[0]->setResolution(12);
star297 0:a3c589406dc4 38 // probe[1]->setResolution(9);
star297 0:a3c589406dc4 39 // probe[2]->setResolution(10);
star297 0:a3c589406dc4 40
star297 0:a3c589406dc4 41 t.start();
star297 0:a3c589406dc4 42
star297 0:a3c589406dc4 43 while(1) {
star297 0:a3c589406dc4 44
star297 0:a3c589406dc4 45 printf("\033[0m\033[2J\033[HDS Sensor data..\n\n");
star297 0:a3c589406dc4 46
star297 0:a3c589406dc4 47 int DS_error = 0;
star297 0:a3c589406dc4 48 for (int i = 0; i < DS; i++) {
star297 0:a3c589406dc4 49 Temp[i] = probe[i]->temperature();
star297 0:a3c589406dc4 50 if(Temp[i]==-1000) {
star297 0:a3c589406dc4 51 Temp[i] = probe[i]->temperature(); // get read temp again if error
star297 0:a3c589406dc4 52 DS_error++;
star297 0:a3c589406dc4 53 }
star297 0:a3c589406dc4 54 printf("Probe %d: %3.2f %cc\r\n",i,Temp[i],0xb0);
star297 0:a3c589406dc4 55 }
star297 0:a3c589406dc4 56 printf("\nDS errors: %d\n\n", DS_error);
star297 0:a3c589406dc4 57
star297 0:a3c589406dc4 58 printf("Start conversion\n");
star297 0:a3c589406dc4 59 t.reset();
star297 0:a3c589406dc4 60 // don't wait for conversion, but do something that takes at least 750ms before reading the sensors
star297 0:a3c589406dc4 61 //if(DS>0){probe[0]->convertTemperature(0, DS1820::all_devices);}
star297 0:a3c589406dc4 62
star297 0:a3c589406dc4 63 // wait for conversion, can take up to 750ms(12 bit mode)
star297 0:a3c589406dc4 64 if(DS>0){probe[0]->convertTemperature(1, DS1820::all_devices);}
star297 0:a3c589406dc4 65
star297 0:a3c589406dc4 66 printf("\nConvert process time: %0.6f Seconds\n", chrono::duration<float>(t.elapsed_time()).count());
star297 0:a3c589406dc4 67
star297 0:a3c589406dc4 68 ThisThread::sleep_for(chrono::milliseconds(1000));
star297 0:a3c589406dc4 69 }
star297 0:a3c589406dc4 70 }