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); } }
Diff: OneWireDevice.cpp
- Revision:
- 2:07da4deb7135
- Child:
- 3:7bd102cb73e0
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/OneWireDevice.cpp Tue Dec 18 11:40:28 2012 +0000 @@ -0,0 +1,18 @@ +#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]; +}