KIT Solar Car Project / Mbed OS BMS_3029_T1

BMS_T2

Dependencies:   INA226

max6675.cpp@2:3bbbe439ec11, 2020-10-13 (annotated)

Committer:
takuma1
Date:
Tue Oct 13 06:26:34 2020 +0000
Revision:
2:3bbbe439ec11
BMS_NO_CAN;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
takuma1 2:3bbbe439ec11 1
takuma1 2:3bbbe439ec11 2 #include <mbed.h>
takuma1 2:3bbbe439ec11 3 #include "max6675.h"
takuma1 2:3bbbe439ec11 4
takuma1 2:3bbbe439ec11 5 max6675::max6675(SPI& _spi, PinName _ncs) : spi(_spi), ncs(_ncs) {
takuma1 2:3bbbe439ec11 6
takuma1 2:3bbbe439ec11 7 }
takuma1 2:3bbbe439ec11 8
takuma1 2:3bbbe439ec11 9 float max6675::read_temp() {
takuma1 2:3bbbe439ec11 10 short value = 0;
takuma1 2:3bbbe439ec11 11 float temp = 0;
takuma1 2:3bbbe439ec11 12
takuma1 2:3bbbe439ec11 13 uint8_t highByte=0;
takuma1 2:3bbbe439ec11 14 uint8_t lowByte=0;
takuma1 2:3bbbe439ec11 15
takuma1 2:3bbbe439ec11 16 select();
takuma1 2:3bbbe439ec11 17 wait(.25); //This delay is needed else it does'nt seem to update the temp
takuma1 2:3bbbe439ec11 18
takuma1 2:3bbbe439ec11 19 highByte = spi.write(0);
takuma1 2:3bbbe439ec11 20 lowByte = spi.write(0);
takuma1 2:3bbbe439ec11 21 deselect();
takuma1 2:3bbbe439ec11 22
takuma1 2:3bbbe439ec11 23
takuma1 2:3bbbe439ec11 24 if (lowByte & (1<<2)) {
takuma1 2:3bbbe439ec11 25 error("No Probe");
takuma1 2:3bbbe439ec11 26 } else {
takuma1 2:3bbbe439ec11 27 value = (highByte << 5 | lowByte>>3);
takuma1 2:3bbbe439ec11 28 }
takuma1 2:3bbbe439ec11 29
takuma1 2:3bbbe439ec11 30 temp = (value*0.25); // Multiply the value by 0.25 to get temp in ˚C or
takuma1 2:3bbbe439ec11 31 // * (9.0/5.0)) + 32.0; // Convert value to ˚F (ensure proper floats!)
takuma1 2:3bbbe439ec11 32
takuma1 2:3bbbe439ec11 33 return temp;
takuma1 2:3bbbe439ec11 34 }
takuma1 2:3bbbe439ec11 35
takuma1 2:3bbbe439ec11 36 void max6675::select() {
takuma1 2:3bbbe439ec11 37 ncs = 0;
takuma1 2:3bbbe439ec11 38 }
takuma1 2:3bbbe439ec11 39
takuma1 2:3bbbe439ec11 40 void max6675::deselect() {
takuma1 2:3bbbe439ec11 41 ncs = 1;
takuma1 2:3bbbe439ec11 42 }