Ivan Kravets / OneWire

OneWire Library lets you access 1-wire devices made by Maxim/Dallas, such as temperature sensors

Dependents:   OneWireTest mbed_blinky Affich_Lum_Moist Projetv0 ... more 

#include "mbed.h"
#include "OneWire.h"

OneWire owBus(p21);

int main()
{
    char _id[16];
    DeviceAddresses* devAddresses = owBus.getFoundDevAddresses();
    uint8_t foundNum = owBus.getFoundDevNum();
    printf("OneWire: found %d devices\r\n", foundNum);

    while(1) {
        OneWireDeviceTemperature::startConversationForAll(&owBus, OWTEMP_11_BIT);
        for (uint8_t i = 0; i < foundNum; i++) {
            OneWireDevice* owDevice = OneWireDeviceFactory::init(&owBus, (*devAddresses)[i]);
            
            if (owDevice->getFamily() != ONEWIRE_DS18B20_FAMILY)    // currently only DS18B20 supports
                continue;

            owDevice->generateId(_id);
            printf("OneWire: device #%s = %.4f*C\r\n", _id, (float) owDevice->sendGetCommand(GET_TEMPERATURE));
            delete owDevice;            
        }
        
        wait(5);
    }
 }

OneWireDevice.cpp

Committer:
ivank
Date:
2012-12-18
Revision:
2:07da4deb7135
Child:
3:7bd102cb73e0

File content as of revision 2:07da4deb7135:

#include "OneWireDevice.h"

OneWireDevice::OneWireDevice(OneWire* ow, DeviceAddress devAddr)
{
    owBus = ow;
    for (uint8_t i = 0; i < 8; i++)
        address[i] = devAddr[i];
}

void OneWireDevice::generateId(char* id)
{
    sprintf(id, "%02X%02X%02X%02X%02X%02X%02X%02X", address[0], address[1],address[2],address[3],address[4],address[5],address[6],address[7]);
}

uint8_t OneWireDevice::getFamily()
{
    return address[0];
}