Hirofumi Otori / INA226PRC

ストロベリー・リナックスで扱ってるINA226PRC用のライブラリです。 https://strawberry-linux.com/catalog/items?code=12226

Dependents:   SITB_INA226PRC

INA226.cpp@0:c81a0493eb46, 2015-12-09 (annotated)

Committer:
leibun
Date:
Wed Dec 09 16:02:25 2015 +0000
Revision:
0:c81a0493eb46
first commit.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
leibun 0:c81a0493eb46 1 /**
leibun 0:c81a0493eb46 2 * @section LICENSE
leibun 0:c81a0493eb46 3 * Released under the MIT License: http://mbed.org/license/mit
leibun 0:c81a0493eb46 4 * Copyright (C) 2012 tosihisa
leibun 0:c81a0493eb46 5 *
leibun 0:c81a0493eb46 6 * @section DESCRIPTION
leibun 0:c81a0493eb46 7 * INA226 - Bi-Directional CURRENT/POWER MONITOR with I2C
leibun 0:c81a0493eb46 8 * http://strawberry-linux.com/catalog/items?code=12031
leibun 0:c81a0493eb46 9 *
leibun 0:c81a0493eb46 10 */
leibun 0:c81a0493eb46 11 #include "mbed.h"
leibun 0:c81a0493eb46 12 #include "INA226.hpp"
leibun 0:c81a0493eb46 13
leibun 0:c81a0493eb46 14 INA226::INA226(I2C &i2c_,int addr_,int freq_) : i2c(i2c_),i2c_addr(addr_),freq(freq_)
leibun 0:c81a0493eb46 15 {
leibun 0:c81a0493eb46 16 i2c.frequency(freq);
leibun 0:c81a0493eb46 17 }
leibun 0:c81a0493eb46 18
leibun 0:c81a0493eb46 19 int INA226::isExist(void)
leibun 0:c81a0493eb46 20 {
leibun 0:c81a0493eb46 21 char p_addr = 0; //Select Configuration Register.
leibun 0:c81a0493eb46 22 i2c.frequency(freq);
leibun 0:c81a0493eb46 23 if(i2c.write(i2c_addr | 0,&p_addr,sizeof(p_addr)) == 0){
leibun 0:c81a0493eb46 24 return 1;
leibun 0:c81a0493eb46 25 }
leibun 0:c81a0493eb46 26 return 0;
leibun 0:c81a0493eb46 27 }
leibun 0:c81a0493eb46 28
leibun 0:c81a0493eb46 29 int INA226::rawWrite(char pointer_addr,unsigned short val_)
leibun 0:c81a0493eb46 30 {
leibun 0:c81a0493eb46 31 char val[3];
leibun 0:c81a0493eb46 32 val[0] = pointer_addr;
leibun 0:c81a0493eb46 33 val[1] = static_cast<char>((val_ >> 8) & 0x00ff);
leibun 0:c81a0493eb46 34 val[2] = static_cast<char>(val_ & 0x00ff);
leibun 0:c81a0493eb46 35 i2c.frequency(freq);
leibun 0:c81a0493eb46 36 if(i2c.write(i2c_addr | 0,val,sizeof(val)) == 0){
leibun 0:c81a0493eb46 37 return 0;
leibun 0:c81a0493eb46 38 }
leibun 0:c81a0493eb46 39 return 1;
leibun 0:c81a0493eb46 40 }
leibun 0:c81a0493eb46 41
leibun 0:c81a0493eb46 42 int INA226::rawRead(char pointer_addr,unsigned short *val_)
leibun 0:c81a0493eb46 43 {
leibun 0:c81a0493eb46 44 char p_addr = pointer_addr;
leibun 0:c81a0493eb46 45 char val[2];
leibun 0:c81a0493eb46 46 i2c.frequency(freq);
leibun 0:c81a0493eb46 47 if(i2c.write(i2c_addr | 0,&p_addr,sizeof(p_addr)) == 0){
leibun 0:c81a0493eb46 48 if(i2c.read(i2c_addr | 0x01,val,sizeof(val)) == 0){
leibun 0:c81a0493eb46 49 *val_ = static_cast<unsigned short>(val[0]);
leibun 0:c81a0493eb46 50 *val_ = (*val_ << 8) | static_cast<unsigned short>(val[1]);
leibun 0:c81a0493eb46 51 return 0;
leibun 0:c81a0493eb46 52 }
leibun 0:c81a0493eb46 53 }
leibun 0:c81a0493eb46 54 return 1;
leibun 0:c81a0493eb46 55 }
leibun 0:c81a0493eb46 56
leibun 0:c81a0493eb46 57 int INA226::getVoltage(double *V_)
leibun 0:c81a0493eb46 58 {
leibun 0:c81a0493eb46 59 unsigned short val;
leibun 0:c81a0493eb46 60 if(rawRead(0x02,&val) == 0){
leibun 0:c81a0493eb46 61 *V_ = static_cast<double>(val) * 1.25;
leibun 0:c81a0493eb46 62 return 0;
leibun 0:c81a0493eb46 63 }
leibun 0:c81a0493eb46 64 return 1;
leibun 0:c81a0493eb46 65 }
leibun 0:c81a0493eb46 66
leibun 0:c81a0493eb46 67 int INA226::getCurrent(double *I_)
leibun 0:c81a0493eb46 68 {
leibun 0:c81a0493eb46 69 unsigned short val;
leibun 0:c81a0493eb46 70 if(rawRead(0x04,&val) == 0){
leibun 0:c81a0493eb46 71 char *s_p = reinterpret_cast<char *>(&val);
leibun 0:c81a0493eb46 72 short d_s;
leibun 0:c81a0493eb46 73 char *d_p = reinterpret_cast<char *>(&d_s);
leibun 0:c81a0493eb46 74 *(d_p + 0) = *(s_p + 0);
leibun 0:c81a0493eb46 75 *(d_p + 1) = *(s_p + 1);
leibun 0:c81a0493eb46 76 *I_ = (static_cast<double>(d_s)) / 10.0; // [mA]
leibun 0:c81a0493eb46 77 return 0;
leibun 0:c81a0493eb46 78 }
leibun 0:c81a0493eb46 79 return 1;
leibun 0:c81a0493eb46 80 }
leibun 0:c81a0493eb46 81
leibun 0:c81a0493eb46 82 int INA226::setCurrentCalibration(unsigned short val)
leibun 0:c81a0493eb46 83 {
leibun 0:c81a0493eb46 84 return rawWrite(0x05,val);
leibun 0:c81a0493eb46 85 }