INA226 (Texas Instruments) High-or Low-Side Measurement,Bi-Directional CURRENT/POWER MONITOR with I2C Interface
INA226.cpp@3:d4affcc81306, 2017-08-23 (annotated)
- Committer:
- kenjiArai
- Date:
- Wed Aug 23 09:25:12 2017 +0000
- Revision:
- 3:d4affcc81306
- Parent:
- 2:b1e759cb121e
countermeasure for NonCopyable
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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kenjiArai | 0:d17469a618b3 | 1 | /* |
kenjiArai | 0:d17469a618b3 | 2 | * mbed library program |
kenjiArai | 0:d17469a618b3 | 3 | * INA226 High-or Low-Side Measurement,Bi-Directional CURRENT/POWER MONITOR with I2C Interface |
kenjiArai | 0:d17469a618b3 | 4 | * by Texas Instruments |
kenjiArai | 0:d17469a618b3 | 5 | * |
kenjiArai | 3:d4affcc81306 | 6 | * Copyright (c) 2015,'17 Kenji Arai / JH1PJL |
kenjiArai | 0:d17469a618b3 | 7 | * http://www.page.sannet.ne.jp/kenjia/index.html |
kenjiArai | 0:d17469a618b3 | 8 | * http://mbed.org/users/kenjiArai/ |
kenjiArai | 3:d4affcc81306 | 9 | * Created: January 25th, 2015 |
kenjiArai | 3:d4affcc81306 | 10 | * Revised: August 23rd, 2017 |
kenjiArai | 0:d17469a618b3 | 11 | */ |
kenjiArai | 0:d17469a618b3 | 12 | |
kenjiArai | 0:d17469a618b3 | 13 | #include "mbed.h" |
kenjiArai | 0:d17469a618b3 | 14 | #include "INA226.h" |
kenjiArai | 0:d17469a618b3 | 15 | |
kenjiArai | 3:d4affcc81306 | 16 | INA226::INA226 (PinName p_sda, PinName p_scl, const INA226_TypeDef *ina226_parameter) |
kenjiArai | 3:d4affcc81306 | 17 | : _i2c_p(new I2C(p_sda, p_scl)), _i2c(*_i2c_p) |
kenjiArai | 0:d17469a618b3 | 18 | { |
kenjiArai | 0:d17469a618b3 | 19 | _i2c.frequency(400000); |
kenjiArai | 0:d17469a618b3 | 20 | ina226_set_data = *ina226_parameter; |
kenjiArai | 0:d17469a618b3 | 21 | initialize(); |
kenjiArai | 0:d17469a618b3 | 22 | } |
kenjiArai | 0:d17469a618b3 | 23 | |
kenjiArai | 3:d4affcc81306 | 24 | INA226::INA226 (PinName p_sda, PinName p_scl, uint8_t addr) |
kenjiArai | 3:d4affcc81306 | 25 | : _i2c_p(new I2C(p_sda, p_scl)), _i2c(*_i2c_p) |
kenjiArai | 0:d17469a618b3 | 26 | { |
kenjiArai | 0:d17469a618b3 | 27 | _i2c.frequency(400000); |
kenjiArai | 0:d17469a618b3 | 28 | // Use standard setting |
kenjiArai | 0:d17469a618b3 | 29 | ina226_set_data = ina226_std_paramtr; |
kenjiArai | 0:d17469a618b3 | 30 | // Change user defined address |
kenjiArai | 0:d17469a618b3 | 31 | ina226_set_data.addr = addr; |
kenjiArai | 0:d17469a618b3 | 32 | initialize(); |
kenjiArai | 0:d17469a618b3 | 33 | } |
kenjiArai | 0:d17469a618b3 | 34 | |
kenjiArai | 3:d4affcc81306 | 35 | INA226::INA226 (PinName p_sda, PinName p_scl) |
kenjiArai | 3:d4affcc81306 | 36 | : _i2c_p(new I2C(p_sda, p_scl)), _i2c(*_i2c_p) |
kenjiArai | 0:d17469a618b3 | 37 | { |
kenjiArai | 0:d17469a618b3 | 38 | _i2c.frequency(400000); |
kenjiArai | 0:d17469a618b3 | 39 | // Use standard setting |
kenjiArai | 0:d17469a618b3 | 40 | ina226_set_data = ina226_std_paramtr; |
kenjiArai | 0:d17469a618b3 | 41 | initialize(); |
kenjiArai | 0:d17469a618b3 | 42 | } |
kenjiArai | 0:d17469a618b3 | 43 | |
kenjiArai | 3:d4affcc81306 | 44 | INA226::INA226 (I2C& p_i2c, const INA226_TypeDef *ina226_parameter) |
kenjiArai | 3:d4affcc81306 | 45 | : _i2c(p_i2c) |
kenjiArai | 0:d17469a618b3 | 46 | { |
kenjiArai | 0:d17469a618b3 | 47 | _i2c.frequency(400000); |
kenjiArai | 0:d17469a618b3 | 48 | ina226_set_data = *ina226_parameter; |
kenjiArai | 0:d17469a618b3 | 49 | initialize(); |
kenjiArai | 0:d17469a618b3 | 50 | } |
kenjiArai | 0:d17469a618b3 | 51 | |
kenjiArai | 3:d4affcc81306 | 52 | INA226::INA226 (I2C& p_i2c, uint8_t addr) |
kenjiArai | 3:d4affcc81306 | 53 | : _i2c(p_i2c) |
kenjiArai | 0:d17469a618b3 | 54 | { |
kenjiArai | 0:d17469a618b3 | 55 | _i2c.frequency(400000); |
kenjiArai | 0:d17469a618b3 | 56 | // Use standard setting |
kenjiArai | 0:d17469a618b3 | 57 | ina226_set_data = ina226_std_paramtr; |
kenjiArai | 0:d17469a618b3 | 58 | // Change user defined address |
kenjiArai | 0:d17469a618b3 | 59 | ina226_set_data.addr = addr; |
kenjiArai | 0:d17469a618b3 | 60 | initialize(); |
kenjiArai | 0:d17469a618b3 | 61 | } |
kenjiArai | 0:d17469a618b3 | 62 | |
kenjiArai | 3:d4affcc81306 | 63 | INA226::INA226 (I2C& p_i2c) |
kenjiArai | 3:d4affcc81306 | 64 | : _i2c(p_i2c) |
kenjiArai | 0:d17469a618b3 | 65 | { |
kenjiArai | 0:d17469a618b3 | 66 | _i2c.frequency(400000); |
kenjiArai | 0:d17469a618b3 | 67 | // Use standard setting |
kenjiArai | 0:d17469a618b3 | 68 | ina226_set_data = ina226_std_paramtr; |
kenjiArai | 0:d17469a618b3 | 69 | initialize(); |
kenjiArai | 0:d17469a618b3 | 70 | } |
kenjiArai | 0:d17469a618b3 | 71 | |
kenjiArai | 0:d17469a618b3 | 72 | /////////////// Read Current ////////////////////////////// |
kenjiArai | 0:d17469a618b3 | 73 | float INA226::read_current() |
kenjiArai | 0:d17469a618b3 | 74 | { |
kenjiArai | 0:d17469a618b3 | 75 | dt[0] = INA226_CURRENT; |
kenjiArai | 0:d17469a618b3 | 76 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 1, true); |
kenjiArai | 0:d17469a618b3 | 77 | _i2c.read((int)ina226_set_data.addr, (char *)dt, 2, false); |
kenjiArai | 0:d17469a618b3 | 78 | int16_t data = (dt[0] << 8) | dt[1]; |
kenjiArai | 0:d17469a618b3 | 79 | return (float)data /1000; |
kenjiArai | 0:d17469a618b3 | 80 | } |
kenjiArai | 0:d17469a618b3 | 81 | |
kenjiArai | 0:d17469a618b3 | 82 | /////////////// Read Power //////////////////////////////// |
kenjiArai | 0:d17469a618b3 | 83 | float INA226::read_power() |
kenjiArai | 0:d17469a618b3 | 84 | { |
kenjiArai | 0:d17469a618b3 | 85 | dt[0] = INA226_POWER; |
kenjiArai | 0:d17469a618b3 | 86 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 1, true); |
kenjiArai | 0:d17469a618b3 | 87 | _i2c.read((int)ina226_set_data.addr, (char *)dt, 2, false); |
kenjiArai | 0:d17469a618b3 | 88 | int16_t data = (dt[0] << 8) | dt[1]; |
kenjiArai | 0:d17469a618b3 | 89 | return (float)data * 25 / 1000; |
kenjiArai | 0:d17469a618b3 | 90 | } |
kenjiArai | 0:d17469a618b3 | 91 | |
kenjiArai | 0:d17469a618b3 | 92 | /////////////// Read Bus_volt ///////////////////////////// |
kenjiArai | 0:d17469a618b3 | 93 | float INA226::read_bus_voltage() |
kenjiArai | 0:d17469a618b3 | 94 | { |
kenjiArai | 0:d17469a618b3 | 95 | dt[0] = INA226_BUS_VOLT; |
kenjiArai | 0:d17469a618b3 | 96 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 1, true); |
kenjiArai | 0:d17469a618b3 | 97 | _i2c.read((int)ina226_set_data.addr, (char *)dt, 2, false); |
kenjiArai | 0:d17469a618b3 | 98 | int16_t data = (dt[0] << 8) | dt[1]; |
kenjiArai | 3:d4affcc81306 | 99 | return (float)data * 1.25f / 1000.0f; |
kenjiArai | 0:d17469a618b3 | 100 | } |
kenjiArai | 0:d17469a618b3 | 101 | |
kenjiArai | 0:d17469a618b3 | 102 | /////////////// Read Shunt volt /////////////////////////// |
kenjiArai | 0:d17469a618b3 | 103 | float INA226::read_shunt_voltage() |
kenjiArai | 0:d17469a618b3 | 104 | { |
kenjiArai | 0:d17469a618b3 | 105 | dt[0] = INA226_SHUNT_V; |
kenjiArai | 0:d17469a618b3 | 106 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 1, true); |
kenjiArai | 0:d17469a618b3 | 107 | _i2c.read((int)ina226_set_data.addr, (char *)dt, 2, false); |
kenjiArai | 0:d17469a618b3 | 108 | int16_t data = (dt[0] << 8) | dt[1]; |
kenjiArai | 3:d4affcc81306 | 109 | return (float)data * 2.5f / 1000.0f; |
kenjiArai | 0:d17469a618b3 | 110 | } |
kenjiArai | 0:d17469a618b3 | 111 | |
kenjiArai | 0:d17469a618b3 | 112 | float INA226::read_current_by_shuntvolt() |
kenjiArai | 0:d17469a618b3 | 113 | { |
kenjiArai | 0:d17469a618b3 | 114 | dt[0] = INA226_SHUNT_V; |
kenjiArai | 0:d17469a618b3 | 115 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 1, true); |
kenjiArai | 0:d17469a618b3 | 116 | _i2c.read((int)ina226_set_data.addr, (char *)dt, 2, false); |
kenjiArai | 0:d17469a618b3 | 117 | int16_t data = (dt[0] << 8) | dt[1]; |
kenjiArai | 0:d17469a618b3 | 118 | return (float)data / 10; |
kenjiArai | 0:d17469a618b3 | 119 | // return ((float)data / ina226_set_data.shunt_register) / 1000; |
kenjiArai | 0:d17469a618b3 | 120 | } |
kenjiArai | 0:d17469a618b3 | 121 | |
kenjiArai | 2:b1e759cb121e | 122 | int16_t INA226::read_shunt_raw_voltage() |
kenjiArai | 2:b1e759cb121e | 123 | { |
kenjiArai | 2:b1e759cb121e | 124 | dt[0] = INA226_SHUNT_V; |
kenjiArai | 2:b1e759cb121e | 125 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 1, true); |
kenjiArai | 2:b1e759cb121e | 126 | _i2c.read((int)ina226_set_data.addr, (char *)dt, 2, false); |
kenjiArai | 2:b1e759cb121e | 127 | int16_t data = (dt[0] << 8) | dt[1]; |
kenjiArai | 2:b1e759cb121e | 128 | return data; |
kenjiArai | 2:b1e759cb121e | 129 | } |
kenjiArai | 2:b1e759cb121e | 130 | |
kenjiArai | 0:d17469a618b3 | 131 | /////////////// Read configulation //////////////////////// |
kenjiArai | 0:d17469a618b3 | 132 | uint16_t INA226::read_config() |
kenjiArai | 0:d17469a618b3 | 133 | { |
kenjiArai | 0:d17469a618b3 | 134 | dt[0] = INA226_CONFIG; |
kenjiArai | 0:d17469a618b3 | 135 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 1, true); |
kenjiArai | 0:d17469a618b3 | 136 | _i2c.read((int)ina226_set_data.addr, (char *)dt, 2, false); |
kenjiArai | 0:d17469a618b3 | 137 | uint16_t data = (dt[0] << 8) | dt[1]; |
kenjiArai | 0:d17469a618b3 | 138 | return data; |
kenjiArai | 0:d17469a618b3 | 139 | } |
kenjiArai | 0:d17469a618b3 | 140 | |
kenjiArai | 0:d17469a618b3 | 141 | /////////////// Set configulation ///////////////////////// |
kenjiArai | 0:d17469a618b3 | 142 | uint16_t INA226::set_config(uint16_t cfg) |
kenjiArai | 0:d17469a618b3 | 143 | { |
kenjiArai | 0:d17469a618b3 | 144 | uint16_t data = cfg; |
kenjiArai | 0:d17469a618b3 | 145 | dt[0] = INA226_CONFIG; |
kenjiArai | 0:d17469a618b3 | 146 | dt[1] = data >> 8; // MSB 1st |
kenjiArai | 0:d17469a618b3 | 147 | dt[2] = data & 0xff; // LSB 2nd |
kenjiArai | 0:d17469a618b3 | 148 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 3, false); |
kenjiArai | 0:d17469a618b3 | 149 | return data; |
kenjiArai | 0:d17469a618b3 | 150 | } |
kenjiArai | 0:d17469a618b3 | 151 | |
kenjiArai | 0:d17469a618b3 | 152 | /////////////// Read Calibration reg. ///////////////////// |
kenjiArai | 0:d17469a618b3 | 153 | uint16_t INA226::read_calb(void) |
kenjiArai | 0:d17469a618b3 | 154 | { |
kenjiArai | 0:d17469a618b3 | 155 | dt[0] = INA226_CALBLATION; |
kenjiArai | 0:d17469a618b3 | 156 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 1, true); |
kenjiArai | 0:d17469a618b3 | 157 | _i2c.read((int)ina226_set_data.addr, (char *)dt, 2, false); |
kenjiArai | 0:d17469a618b3 | 158 | uint16_t data = (dt[0] << 8) | dt[1]; |
kenjiArai | 0:d17469a618b3 | 159 | return data; |
kenjiArai | 0:d17469a618b3 | 160 | } |
kenjiArai | 0:d17469a618b3 | 161 | |
kenjiArai | 0:d17469a618b3 | 162 | /////////////// Set Calibration reg. ////////////////////// |
kenjiArai | 0:d17469a618b3 | 163 | uint16_t INA226::set_calb(uint16_t clb) |
kenjiArai | 0:d17469a618b3 | 164 | { |
kenjiArai | 0:d17469a618b3 | 165 | uint16_t data = clb; |
kenjiArai | 0:d17469a618b3 | 166 | dt[0] = INA226_CALBLATION; |
kenjiArai | 0:d17469a618b3 | 167 | dt[1] = data >> 8; // MSB 1st |
kenjiArai | 0:d17469a618b3 | 168 | dt[2] = data & 0xff; // LSB 2nd |
kenjiArai | 0:d17469a618b3 | 169 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 3, false); |
kenjiArai | 0:d17469a618b3 | 170 | return data; |
kenjiArai | 0:d17469a618b3 | 171 | } |
kenjiArai | 0:d17469a618b3 | 172 | |
kenjiArai | 0:d17469a618b3 | 173 | /////////////// Read Mask/Enable reg. ///////////////////// |
kenjiArai | 0:d17469a618b3 | 174 | uint16_t INA226::read_msk_enbl(void) |
kenjiArai | 0:d17469a618b3 | 175 | { |
kenjiArai | 0:d17469a618b3 | 176 | dt[0] = INA226_MASK_EN; |
kenjiArai | 0:d17469a618b3 | 177 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 1, true); |
kenjiArai | 0:d17469a618b3 | 178 | _i2c.read((int)ina226_set_data.addr, (char *)dt, 2, false); |
kenjiArai | 0:d17469a618b3 | 179 | uint16_t data = (dt[0] << 8) | dt[1]; |
kenjiArai | 0:d17469a618b3 | 180 | return data; |
kenjiArai | 0:d17469a618b3 | 181 | } |
kenjiArai | 0:d17469a618b3 | 182 | |
kenjiArai | 0:d17469a618b3 | 183 | /////////////// Set Mask/Enable reg. ///////////////////// |
kenjiArai | 1:91ce58cd3489 | 184 | uint16_t INA226::set_msk_enbl(uint16_t msk_enable) |
kenjiArai | 0:d17469a618b3 | 185 | { |
kenjiArai | 0:d17469a618b3 | 186 | uint16_t data = msk_enable; |
kenjiArai | 0:d17469a618b3 | 187 | dt[0] = INA226_MASK_EN; |
kenjiArai | 0:d17469a618b3 | 188 | dt[1] = data >> 8; // MSB 1st |
kenjiArai | 0:d17469a618b3 | 189 | dt[2] = data & 0xff; // LSB 2nd |
kenjiArai | 0:d17469a618b3 | 190 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 3, false); |
kenjiArai | 0:d17469a618b3 | 191 | return data; |
kenjiArai | 0:d17469a618b3 | 192 | } |
kenjiArai | 0:d17469a618b3 | 193 | |
kenjiArai | 0:d17469a618b3 | 194 | uint8_t INA226::read_ID() |
kenjiArai | 0:d17469a618b3 | 195 | { |
kenjiArai | 0:d17469a618b3 | 196 | dt[0] = INA226_DIE_ID; |
kenjiArai | 0:d17469a618b3 | 197 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 1, true); |
kenjiArai | 0:d17469a618b3 | 198 | _i2c.read((int)ina226_set_data.addr, (char *)dt, 1, false); |
kenjiArai | 0:d17469a618b3 | 199 | id_number = dt[0]; |
kenjiArai | 0:d17469a618b3 | 200 | return id_number; |
kenjiArai | 0:d17469a618b3 | 201 | } |
kenjiArai | 0:d17469a618b3 | 202 | |
kenjiArai | 0:d17469a618b3 | 203 | /////////////// Read/Write specific register ////////////// |
kenjiArai | 0:d17469a618b3 | 204 | uint8_t INA226::read_reg(uint8_t addr) |
kenjiArai | 0:d17469a618b3 | 205 | { |
kenjiArai | 0:d17469a618b3 | 206 | dt[0] = addr; |
kenjiArai | 0:d17469a618b3 | 207 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 1, true); |
kenjiArai | 0:d17469a618b3 | 208 | _i2c.read((int)ina226_set_data.addr, (char *)dt, 1, false); |
kenjiArai | 0:d17469a618b3 | 209 | return dt[0]; |
kenjiArai | 0:d17469a618b3 | 210 | } |
kenjiArai | 0:d17469a618b3 | 211 | |
kenjiArai | 0:d17469a618b3 | 212 | uint8_t INA226::write_reg(uint8_t addr, uint8_t data) |
kenjiArai | 0:d17469a618b3 | 213 | { |
kenjiArai | 0:d17469a618b3 | 214 | dt[0] = addr; |
kenjiArai | 0:d17469a618b3 | 215 | dt[1] = data; |
kenjiArai | 0:d17469a618b3 | 216 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 2, false); |
kenjiArai | 0:d17469a618b3 | 217 | return dt[1]; |
kenjiArai | 0:d17469a618b3 | 218 | } |
kenjiArai | 0:d17469a618b3 | 219 | |
kenjiArai | 0:d17469a618b3 | 220 | /////////////// Initialize //////////////////////////////// |
kenjiArai | 0:d17469a618b3 | 221 | void INA226::initialize() |
kenjiArai | 0:d17469a618b3 | 222 | { |
kenjiArai | 0:d17469a618b3 | 223 | uint16_t data = 0; |
kenjiArai | 0:d17469a618b3 | 224 | data = (ina226_set_data.average & 0x07) << 9; |
kenjiArai | 0:d17469a618b3 | 225 | data |= (ina226_set_data.b_volt_cnv_time & 0x07) << 6; |
kenjiArai | 0:d17469a618b3 | 226 | data |= (ina226_set_data.s_volt_cnv_time & 0x07) << 3; |
kenjiArai | 0:d17469a618b3 | 227 | data |= (ina226_set_data.mode & 0x07); |
kenjiArai | 0:d17469a618b3 | 228 | dt[0] = INA226_CONFIG; |
kenjiArai | 0:d17469a618b3 | 229 | dt[1] = data >> 8; // MSB 1st |
kenjiArai | 0:d17469a618b3 | 230 | dt[2] = data & 0xff; // LSB 2nd |
kenjiArai | 0:d17469a618b3 | 231 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 3, false); |
kenjiArai | 0:d17469a618b3 | 232 | dt[0] = INA226_CALBLATION; |
kenjiArai | 0:d17469a618b3 | 233 | dt[1] = ina226_set_data.calibration_data >> 8; // MSB 1st |
kenjiArai | 0:d17469a618b3 | 234 | dt[2] = ina226_set_data.calibration_data & 0xff; // LSB 2nd |
kenjiArai | 0:d17469a618b3 | 235 | _i2c.write((int)ina226_set_data.addr, (char *)dt, 3, false); |
kenjiArai | 0:d17469a618b3 | 236 | scale_factor = 0; |
kenjiArai | 0:d17469a618b3 | 237 | read_ID(); |
kenjiArai | 0:d17469a618b3 | 238 | } |
kenjiArai | 0:d17469a618b3 | 239 | |
kenjiArai | 0:d17469a618b3 | 240 | /////////////// I2C Freq. ///////////////////////////////// |
kenjiArai | 0:d17469a618b3 | 241 | void INA226::frequency(int hz) |
kenjiArai | 0:d17469a618b3 | 242 | { |
kenjiArai | 0:d17469a618b3 | 243 | _i2c.frequency(hz); |
kenjiArai | 0:d17469a618b3 | 244 | } |
kenjiArai | 3:d4affcc81306 | 245 |