Juan Manuel Rodriguez Aguado
/
Ejer01
SensorCooler
main.cpp
- Committer:
- hudakz
- Date:
- 2019-01-26
- Revision:
- 6:d68db387a734
- Parent:
- 5:4f7330bb1b64
- Child:
- 7:8beaacebc82d
File content as of revision 6:d68db387a734:
/* * Simple DS1820 sensor demo * * Note: Don't forget to connect a 4.7k Ohm resistor * between the DS1820's data pin and the +3.3V pin * */ #include "mbed.h" #include "DS1820.h" Serial pc(USBTX, USBRX); DigitalOut led(LED1); DS1820 ds1820(PB_11); // substitute p8 with actual mbed pin name connected to the DS1820 data pin float temp = 0; int result = 0; int main() { if(ds1820.begin()) { while(1) { ds1820.startConversion(); // start temperature conversion from analog to digital wait(1.0); // let DS1820 complete the temperature conversion result = ds1820.read(temp); // read temperature from DS1820 and perform cyclic redundancy check (CRC) switch(result) { case 0: // no errors -> 'temp' contains the value of measured temperature pc.printf("temp = %3.1f%cC\r\n", temp, 176); break; case 1: // no sensor present -> 'temp' is not updated pc.printf("no sensor present\n\r"); break; case 2: // CRC error -> 'temp' is not updated pc.printf("CRC error\r\n"); } led = !led; } } else pc.printf("No DS1820 sensor found!\r\n"); } // Array of sensors: //int main() { // DS1820 ds1820[3] = {DS1820(PA_8), DS1820(PA_9), DS1820(PC_7)}; // // for(int i = 0; i < 3; i++) { // if(!ds1820[i].begin()) { // serial.printf("Cannot find sensor %d", i); // } else // ds1820[i].startConversion(); // } // wait(1.0); // let DS1820s complete the temperature conversion // while(1) { // for(int i = 0; i < 3; i++) { // if(ds1820[i].isPresent() { // serial.printf("temp%d = %3.1f\r\n", i, ds1820[i].read()); // read temperature // ds1820[i].startConversion(); // start temperature conversion // } // } // wait(1.0); // let DS1820s complete the temperature conversion // } //} //