lib for realtimeMM funcs
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Diff: sensor_base.cpp
- Revision:
- 1:13301255d95a
- Parent:
- 0:9f82ee1feae7
--- a/sensor_base.cpp Mon Oct 02 11:18:47 2017 +0000 +++ b/sensor_base.cpp Thu Feb 15 16:35:50 2018 +0000 @@ -223,6 +223,63 @@ { } +///////////////////////////////////////// Start of sensor_max6675 /////////////// + +//sensor_max6675::sensor_max6675() : spi(p11,p12,p13), ncs(p18) { +//} + +sensor_max6675::sensor_max6675(SPI _spi, PinName _ncs) : spi(_spi), ncs(_ncs) { +//sensor_max6675::sensor_max6675(PinName _cs, PinName _so, PinName _sck, PinName _ncs) : spi(_cs, _so, _sck), ncs(_ncs) { + +} + +sensor_max6675::~sensor_max6675() +{ +} + +char * sensor_max6675::read_data() +{ + //char mretval[50]; + sprintf(data_sample, "[%d;%f]", sensor_id, read_temp()); + return data_sample; + //mretval[0] = 68; +} + +float sensor_max6675::read_temp() { + short value = 0; + float temp = 0; + + uint8_t highByte=0; + uint8_t lowByte=0; + + select(); + wait(.25); //This delay is needed else it does'nt seem to update the temp + + highByte = spi.write(0); + lowByte = spi.write(0); + deselect(); + + + if (lowByte & (1<<2)) { + error("No Probe"); + } else { + value = (highByte << 5 | lowByte>>3); + } + + temp = (value*0.25); // Multiply the value by 0.25 to get temp in ˚C or + // * (9.0/5.0)) + 32.0; // Convert value to ˚F (ensure proper floats!) + +return temp; +} + +void sensor_max6675::select() { + ncs = 0; +} + +void sensor_max6675::deselect() { + ncs = 1; +} + /* class Counter {