mirror of https://github.com/arendst/Tasmota.git
Added support for multiple INA219 devices on single I2C buss.
This commit is contained in:
Jon Little
parent
56383d3758
commit
ad294e6b01
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@ -84,20 +84,19 @@
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#define INA219_REG_CURRENT (0x04)
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#define INA219_REG_CALIBRATION (0x05)
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uint8_t ina219_type = 0;
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uint8_t ina219_address;
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uint8_t ina219_type[4] = {0,0,0,0};
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uint8_t ina219_addresses[] = { INA219_ADDRESS1, INA219_ADDRESS2, INA219_ADDRESS3, INA219_ADDRESS4 };
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uint32_t ina219_cal_value = 0;
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// The following multiplier is used to convert raw current values to mA, taking into account the current config settings
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uint32_t ina219_current_divider_ma = 0;
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uint8_t ina219_valid = 0;
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float ina219_voltage = 0;
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float ina219_current = 0;
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uint8_t ina219_valid[4] = {0,0,0,0};
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float ina219_voltage[4] = {0,0,0,0};
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float ina219_current[4] = {0,0,0,0};
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char ina219_types[] = "INA219";
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bool Ina219SetCalibration(uint8_t mode)
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bool Ina219SetCalibration(uint8_t mode, uint16_t addr)
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{
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uint16_t config = 0;
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@ -120,40 +119,40 @@ bool Ina219SetCalibration(uint8_t mode)
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break;
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}
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// Set Calibration register to 'Cal' calculated above
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bool success = I2cWrite16(ina219_address, INA219_REG_CALIBRATION, ina219_cal_value);
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bool success = I2cWrite16(addr, INA219_REG_CALIBRATION, ina219_cal_value);
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if (success) {
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// Set Config register to take into account the settings above
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I2cWrite16(ina219_address, INA219_REG_CONFIG, config);
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I2cWrite16(addr, INA219_REG_CONFIG, config);
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}
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return success;
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}
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float Ina219GetShuntVoltage_mV(void)
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float Ina219GetShuntVoltage_mV(uint16_t addr)
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{
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// raw shunt voltage (16-bit signed integer, so +-32767)
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int16_t value = I2cReadS16(ina219_address, INA219_REG_SHUNTVOLTAGE);
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int16_t value = I2cReadS16(addr, INA219_REG_SHUNTVOLTAGE);
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// shunt voltage in mV (so +-327mV)
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return value * 0.01;
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}
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float Ina219GetBusVoltage_V(void)
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float Ina219GetBusVoltage_V(uint16_t addr)
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{
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// Shift to the right 3 to drop CNVR and OVF and multiply by LSB
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// raw bus voltage (16-bit signed integer, so +-32767)
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int16_t value = (int16_t)(((uint16_t)I2cReadS16(ina219_address, INA219_REG_BUSVOLTAGE) >> 3) * 4);
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int16_t value = (int16_t)(((uint16_t)I2cReadS16(addr, INA219_REG_BUSVOLTAGE) >> 3) * 4);
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// bus voltage in volts
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return value * 0.001;
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}
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float Ina219GetCurrent_mA(void)
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float Ina219GetCurrent_mA(uint16_t addr)
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{
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// Sometimes a sharp load will reset the INA219, which will reset the cal register,
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// meaning CURRENT and POWER will not be available ... avoid this by always setting
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// a cal value even if it's an unfortunate extra step
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I2cWrite16(ina219_address, INA219_REG_CALIBRATION, ina219_cal_value);
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I2cWrite16(addr, INA219_REG_CALIBRATION, ina219_cal_value);
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// Now we can safely read the CURRENT register!
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// raw current value (16-bit signed integer, so +-32767)
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float value = I2cReadS16(ina219_address, INA219_REG_CURRENT);
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float value = I2cReadS16(addr, INA219_REG_CURRENT);
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value /= ina219_current_divider_ma;
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// current value in mA, taking into account the config settings and current LSB
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return value;
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@ -161,9 +160,15 @@ float Ina219GetCurrent_mA(void)
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bool Ina219Read(void)
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{
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ina219_voltage = Ina219GetBusVoltage_V() + (Ina219GetShuntVoltage_mV() / 1000);
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ina219_current = Ina219GetCurrent_mA() / 1000;
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ina219_valid = SENSOR_MAX_MISS;
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for (int i=0; i<sizeof(ina219_type); i++) {
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if (!ina219_type[i])
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continue;
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uint16_t addr = ina219_addresses[i];
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ina219_voltage[i] = Ina219GetBusVoltage_V(addr) + (Ina219GetShuntVoltage_mV(addr) / 1000);
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ina219_current[i] = Ina219GetCurrent_mA(addr) / 1000;
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ina219_valid[i] = SENSOR_MAX_MISS;
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// AddLogMissed(ina219_types, ina219_valid);
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}
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return true;
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}
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@ -192,14 +197,13 @@ bool Ina219CommandSensor(void)
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void Ina219Detect(void)
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{
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if (ina219_type) { return; }
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for (uint32_t i = 0; i < sizeof(ina219_addresses); i++) {
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ina219_address = ina219_addresses[i];
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if (Ina219SetCalibration(Settings.ina219_mode)) {
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ina219_type = 1;
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AddLog_P2(LOG_LEVEL_DEBUG, S_LOG_I2C_FOUND_AT, ina219_types, ina219_address);
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break;
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for (int i=0; i<sizeof(ina219_type); i++) {
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if (ina219_type[i])
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continue;
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uint16_t addr = ina219_addresses[i];
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if (Ina219SetCalibration(Settings.ina219_mode, addr)) {
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ina219_type[i] = 1;
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AddLog_P2(LOG_LEVEL_DEBUG, S_LOG_I2C_FOUND_AT, ina219_types, addr);
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}
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}
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}
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@ -207,41 +211,50 @@ void Ina219Detect(void)
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void Ina219EverySecond(void)
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{
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if (87 == (uptime %100)) {
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// 2mS
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// 4 x 2mS
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Ina219Detect();
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}
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else {
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// 3mS
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if (ina219_type) {
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if (!Ina219Read()) {
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AddLogMissed(ina219_types, ina219_valid);
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// if (!ina219_valid) { ina219_type = 0; }
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}
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}
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// 4 x 3mS
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Ina219Read();
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}
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}
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#ifdef USE_WEBSERVER
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const char HTTP_SNS_INA219_DATA[] PROGMEM =
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"{s}INA219 " D_VOLTAGE "{m}%s " D_UNIT_VOLT "{e}"
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"{s}INA219 " D_CURRENT "{m}%s " D_UNIT_AMPERE "{e}"
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"{s}INA219 " D_POWERUSAGE "{m}%s " D_UNIT_WATT "{e}";
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"{s}%s " D_VOLTAGE "{m}%s " D_UNIT_VOLT "{e}"
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"{s}%s " D_CURRENT "{m}%s " D_UNIT_AMPERE "{e}"
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"{s}%s " D_POWERUSAGE "{m}%s " D_UNIT_WATT "{e}";
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#endif // USE_WEBSERVER
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void Ina219Show(bool json)
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{
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if (ina219_valid) {
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float fpower = ina219_voltage * ina219_current;
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char voltage[33];
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dtostrfd(ina219_voltage, Settings.flag2.voltage_resolution, voltage);
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char power[33];
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dtostrfd(fpower, Settings.flag2.wattage_resolution, power);
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char current[33];
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dtostrfd(ina219_current, Settings.flag2.current_resolution, current);
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int num_found=0;
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for (int i=0; i<sizeof(ina219_type); i++)
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if (ina219_type[i] && ina219_valid[i])
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num_found++;
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int sensor_num = 0;
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for (int i=0; i<sizeof(ina219_type); i++) {
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if (!ina219_type[i] || !ina219_valid[i])
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continue;
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sensor_num++;
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char voltage[16];
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dtostrfd(ina219_voltage[i], Settings.flag2.voltage_resolution, voltage);
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char current[16];
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dtostrfd(ina219_current[i], Settings.flag2.current_resolution, current);
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char power[16];
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dtostrfd(ina219_voltage[i] * ina219_current[i], Settings.flag2.wattage_resolution, power);
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char name[16];
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if (num_found>1)
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snprintf_P(name, sizeof(name), PSTR("%s%c%d"), ina219_types, IndexSeparator(), sensor_num);
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else
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snprintf_P(name, sizeof(name), PSTR("%s"), ina219_types);
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if (json) {
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ResponseAppend_P(PSTR(",\"%s\":{\"" D_JSON_VOLTAGE "\":%s,\"" D_JSON_CURRENT "\":%s,\"" D_JSON_POWERUSAGE "\":%s}"),
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ina219_types, voltage, current, power);
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ResponseAppend_P(PSTR(",\"%s\":{\"Id\":%02x,\"" D_JSON_VOLTAGE "\":%s,\"" D_JSON_CURRENT "\":%s,\"" D_JSON_POWERUSAGE "\":%s}"),
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name, ina219_addresses[i], voltage, current, power);
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#ifdef USE_DOMOTICZ
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if (0 == tele_period) {
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DomoticzSensor(DZ_VOLTAGE, voltage);
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@ -250,7 +263,7 @@ void Ina219Show(bool json)
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#endif // USE_DOMOTICZ
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#ifdef USE_WEBSERVER
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} else {
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WSContentSend_PD(HTTP_SNS_INA219_DATA, voltage, current, power);
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WSContentSend_PD(HTTP_SNS_INA219_DATA, name, voltage, name, current, name, power);
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#endif // USE_WEBSERVER
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}
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}
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