IZU2020 / PQINA226

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Dependents:   IZU2020_AVIONICS IZU2020_AVIONICS

PQINA226.cpp@2:2a98c184354f, 2019-12-04 (annotated)

Committer:
tanahashi
Date:
Wed Dec 04 08:18:37 2019 +0000
Revision:
2:2a98c184354f
Parent:
1:13a0acb5a366
Child:
3:252d161776cc
fixed WHO_AM_I address

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tanahashi 0:a88db0ffce6e 1 #include "mbed.h"
tanahashi 0:a88db0ffce6e 2 #include "PQINA226.h"
tanahashi 0:a88db0ffce6e 3
tanahashi 0:a88db0ffce6e 4 INA226::INA226(I2C &i2c, A0_t A0, A1_t A1)
tanahashi 0:a88db0ffce6e 5 {
tanahashi 0:a88db0ffce6e 6 _i2c = &i2c;
tanahashi 1:13a0acb5a366 7 _addr = (0b1000000 | A1 << 2 | A0) << 1;
tanahashi 0:a88db0ffce6e 8 _i2c->frequency(400000);
tanahashi 0:a88db0ffce6e 9 }
tanahashi 0:a88db0ffce6e 10
tanahashi 0:a88db0ffce6e 11 void INA226::begin(){
tanahashi 0:a88db0ffce6e 12 cmd[0] = CALIBRATION;
tanahashi 0:a88db0ffce6e 13 cmd[1] = 0x0A;
tanahashi 0:a88db0ffce6e 14 cmd[2] = 0x00;
tanahashi 0:a88db0ffce6e 15 _i2c->write(_addr, cmd, 3);
tanahashi 0:a88db0ffce6e 16 }
tanahashi 0:a88db0ffce6e 17
tanahashi 0:a88db0ffce6e 18 bool INA226::test()
tanahashi 0:a88db0ffce6e 19 {
tanahashi 0:a88db0ffce6e 20 cmd[0] = WHO_AM_I;
tanahashi 0:a88db0ffce6e 21 _i2c->write(_addr, cmd, 1);
tanahashi 2:2a98c184354f 22 _i2c->read(_addr, buff, 1);
tanahashi 2:2a98c184354f 23 if(buff[0] == 0x22) {
tanahashi 0:a88db0ffce6e 24 return true;
tanahashi 0:a88db0ffce6e 25 } else {
tanahashi 0:a88db0ffce6e 26 return false;
tanahashi 0:a88db0ffce6e 27 }
tanahashi 0:a88db0ffce6e 28 }
tanahashi 0:a88db0ffce6e 29
tanahashi 0:a88db0ffce6e 30 void INA226::read(float *voltage, float *current, float *power)
tanahashi 0:a88db0ffce6e 31 {
tanahashi 0:a88db0ffce6e 32 read_voltage(voltage);
tanahashi 0:a88db0ffce6e 33 read_current(current);
tanahashi 0:a88db0ffce6e 34 read_power(power);
tanahashi 0:a88db0ffce6e 35 }
tanahashi 0:a88db0ffce6e 36
tanahashi 0:a88db0ffce6e 37 void INA226::read_voltage(float *voltage){
tanahashi 0:a88db0ffce6e 38 cmd[0] = BUS_VOLTAGE;
tanahashi 0:a88db0ffce6e 39 _i2c->write(_addr, cmd, 1);
tanahashi 0:a88db0ffce6e 40 _i2c->read(_addr, buff, 2);
tanahashi 0:a88db0ffce6e 41 *voltage = (short)(buff[0] << 8 | buff[1]) * VOLTAGE_LSB;
tanahashi 0:a88db0ffce6e 42 }
tanahashi 0:a88db0ffce6e 43
tanahashi 0:a88db0ffce6e 44 void INA226::read_current(float *current){
tanahashi 0:a88db0ffce6e 45 cmd[0] = CURRENT;
tanahashi 0:a88db0ffce6e 46 _i2c->write(_addr, cmd, 1);
tanahashi 0:a88db0ffce6e 47 _i2c->read(_addr, buff, 2);
tanahashi 0:a88db0ffce6e 48 *current = (short)(buff[0] << 8 | buff[1]);
tanahashi 0:a88db0ffce6e 49 }
tanahashi 0:a88db0ffce6e 50
tanahashi 0:a88db0ffce6e 51 void INA226::read_power(float *power)
tanahashi 0:a88db0ffce6e 52 {
tanahashi 0:a88db0ffce6e 53 cmd[0] = POWER;
tanahashi 0:a88db0ffce6e 54 _i2c->write(_addr, cmd, 1);
tanahashi 0:a88db0ffce6e 55 _i2c->read(_addr, buff, 2);
tanahashi 0:a88db0ffce6e 56 *power = (short)(buff[0] << 8 | buff[1]);
tanahashi 0:a88db0ffce6e 57 }