File content as of revision 9:1d1c57840c7e:

/*
 * 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
 *
 */
/* Single sensor: */
/*
#include "mbed.h"
#include "DS1820.h"

Serial      pc(USBTX, USBRX);
DigitalOut  led(LED1);
OneWire     oneWire(D8);    // substitute D8 with actual mbed pin name connected 1-wire bus
float       temp = 0;
int         result = 0;

int main()
{
    pc.printf("\r\n--Starting--\r\n");
    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");
}
*/

/*Several sensors connected to the same 1-wire bus:*/

#include "mbed.h"
#include "DS1820.h"

#define     SENSORS_COUNT   64      // number of DS1820 sensors to be connected to the 1-wire bus (max 256)

Serial      pc(USBTX, USBRX);
DigitalOut  led(LED1);
OneWire     oneWire(D8);            // substitute D8 with actual mbed pin name connected 1-wire bus
DS1820*     ds1820[SENSORS_COUNT];
int         sensors_found = 0;      // counts the actually found DS1820 sensors
float       temp = 0;
int         result = 0;

int main() {
    int i = 0;
    
    pc.printf("\r\n--Starting--\r\n");
    //Enumerate (i.e. detect) DS1820 sensors on the 1-wire bus
    for(i = 0; i < SENSORS_COUNT; i++) {
        ds1820[i] = new DS1820(&oneWire);
        if(!ds1820[i]->begin()) {
            delete ds1820[i];
            break;
        }
    }
    
    sensors_found = i;
    
    if (sensors_found == 0) {
        pc.printf("No DS1820 sensor found!\r\n");
        return -1;
    }
    else
        pc.printf("Found %d sensors.\r\n", sensors_found);
    
    while(1) {
        pc.printf("-------------------\r\n");
        for(i = 0; i < sensors_found; i++)
            ds1820[i]->startConversion();   // start temperature conversion from analog to digital       
        wait(1.0);                          // let DS1820s complete the temperature conversion
        for(int i = 0; i < sensors_found; i++) {
            if(ds1820[i]->isPresent())
                pc.printf("temp[%d] = %3.1f%cC\r\n", i, ds1820[i]->read(), 176);     // read temperature
        }
    }
}