201 lines
6.6 KiB
C
201 lines
6.6 KiB
C
/**
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* INA3221 driver for esp-open-rtos.
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*
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* Copyright (c) 2016 Zaltora (https://github.com/Zaltora)
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*
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* MIT Licensed as described in the file LICENSE
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*
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* @todo Interupt system for critical and warning alert pin
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*/
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#include "ina3221.h"
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//#define INA3221_DEBUG true
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#ifdef INA3221_DEBUG
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#define debug(fmt, ...) printf("%s: " fmt "\n", "INA3221", ## __VA_ARGS__)
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#else
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#define debug(fmt, ...)
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#endif
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static int _wireWriteRegister (const i2c_dev_t* dev, uint8_t reg, uint16_t value)
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{
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uint8_t d[2] = { 0 , 0 };
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d[1] = value & 0x00FF;
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d[0] = (value >> 8) & 0x00FF;
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debug("Data write to bus %u at %02X : %02X+%04X\n",dev->bus, dev->addr, reg, value);
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return i2c_slave_write(dev->bus, dev->addr, ®, d, sizeof(d));
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}
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static int _wireReadRegister(const i2c_dev_t* dev, uint8_t reg, uint16_t *value)
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{
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uint8_t d[] = {0, 0};
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int error = i2c_slave_read(dev->bus, dev->addr, ®, d, sizeof(d))
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debug("Data read from bus %u at %02X: %02X+%04X\n",dev->bus, dev->addr, reg, *value);
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*value = d[1] | (d[0] << 8);
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return error;
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}
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int ina3221_trigger(ina3221_t *dev)
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{
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return _wireWriteRegister(&dev->i2c_dev, INA3221_REG_CONFIG, dev->config.config_register);
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}
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int ina3221_getStatus(ina3221_t *dev)
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{
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return _wireReadRegister(&dev->i2c_dev, INA3221_REG_MASK, &dev->mask.mask_register);
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}
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int ina3221_sync(ina3221_t *dev)
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{
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uint16_t ptr_data;
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int err = 0;
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//////////////////////// Sync config register
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if ((err = _wireReadRegister(&dev->i2c_dev, INA3221_REG_CONFIG, &ptr_data))) // Read config
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return err;
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if( ptr_data != dev->config.config_register) {
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if ((err = _wireWriteRegister(&dev->i2c_dev, INA3221_REG_CONFIG, dev->config.config_register))) // Update config
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return err;
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}
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//////////////////////// Sync mask register config
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if ((err = _wireReadRegister(&dev->i2c_dev, INA3221_REG_MASK, &ptr_data))) // Read mask
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return err;
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if( (ptr_data & INA3221_MASK_CONFIG) != (dev->mask.mask_register & INA3221_MASK_CONFIG)) {
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if ((err = _wireWriteRegister(&dev->i2c_dev, INA3221_REG_MASK, dev->mask.mask_register & INA3221_MASK_CONFIG))) // Update config
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return err;
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}
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return 0;
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}
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int ina3221_setting(ina3221_t *dev ,bool mode, bool bus, bool shunt)
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{
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dev->config.mode = mode;
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dev->config.ebus = bus;
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dev->config.esht = shunt;
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return _wireWriteRegister(&dev->i2c_dev, INA3221_REG_CONFIG, dev->config.config_register);
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}
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int ina3221_enableChannel(ina3221_t *dev ,bool ch1, bool ch2, bool ch3)
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{
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dev->config.ch1 = ch1;
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dev->config.ch2 = ch2;
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dev->config.ch3 = ch3;
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return _wireWriteRegister(&dev->i2c_dev, INA3221_REG_CONFIG, dev->config.config_register);
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}
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int ina3221_enableChannelSum(ina3221_t *dev ,bool ch1, bool ch2, bool ch3)
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{
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dev->mask.scc1 = ch1;
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dev->mask.scc2 = ch2;
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dev->mask.scc3 = ch3;
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return _wireWriteRegister(&dev->i2c_dev, INA3221_REG_MASK, dev->mask.mask_register & INA3221_MASK_CONFIG);
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}
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int ina3221_enableLatchPin(ina3221_t *dev ,bool warning, bool critical)
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{
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dev->mask.wen = warning;
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dev->mask.cen = critical;
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return _wireWriteRegister(&dev->i2c_dev, INA3221_REG_MASK, dev->mask.mask_register & INA3221_MASK_CONFIG);
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}
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int ina3221_setAverage(ina3221_t *dev, ina3221_avg_t avg)
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{
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dev->config.avg = avg;
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return _wireWriteRegister(&dev->i2c_dev, INA3221_REG_CONFIG, dev->config.config_register);
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}
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int ina3221_setBusConversionTime(ina3221_t *dev,ina3221_ct_t ct)
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{
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dev->config.vbus = ct;
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return _wireWriteRegister(&dev->i2c_dev, INA3221_REG_CONFIG, dev->config.config_register);
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}
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int ina3221_setShuntConversionTime(ina3221_t *dev,ina3221_ct_t ct)
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{
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dev->config.vsht = ct;
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return _wireWriteRegister(&dev->i2c_dev, INA3221_REG_CONFIG, dev->config.config_register);
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}
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int ina3221_reset(ina3221_t *dev)
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{
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dev->config.config_register = INA3221_DEFAULT_CONFIG ; //dev reset
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dev->mask.mask_register = INA3221_DEFAULT_CONFIG ; //dev reset
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dev->config.rst = 1 ;
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return _wireWriteRegister(&dev->i2c_dev, INA3221_REG_CONFIG, dev->config.config_register); // send reset to device
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}
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int ina3221_getBusVoltage(ina3221_t *dev, ina3221_channel_t channel, float *voltage)
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{
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int16_t raw_value;
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int err = 0;
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if ((err = _wireReadRegister(&dev->i2c_dev,INA3221_REG_BUSVOLTAGE_1+channel*2, (uint16_t*)&raw_value)))
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return err;
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*voltage = raw_value*0.001 ; //V 8mV step
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return 0;
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}
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int ina3221_getShuntValue(ina3221_t *dev, ina3221_channel_t channel, float *voltage, float *current)
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{
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int16_t raw_value;
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int err = 0;
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if ((err = _wireReadRegister(&dev->i2c_dev,INA3221_REG_SHUNTVOLTAGE_1+channel*2, (uint16_t*)&raw_value)))
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return err;
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*voltage = raw_value*0.005; //mV 40uV step
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if(!dev->shunt[channel])
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{
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debug("No shunt configured for channel %u. Dev:%u:%X\n",channel+1, dev->bus, dev->addr);
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return -EINVAL;
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}
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*current = (*voltage*1000.0)/dev->shunt[channel] ; //mA
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return 0;
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}
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int ina3221_getSumShuntValue(ina3221_t *dev, float *voltage)
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{
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int16_t raw_value;
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int err = 0;
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if ((err = _wireReadRegister(&dev->i2c_dev,INA3221_REG_SHUNT_VOLTAGE_SUM, (uint16_t*)&raw_value)))
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return err;
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*voltage = raw_value*0.02; //uV 40uV step
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return 0;
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}
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int ina3221_setCriticalAlert(ina3221_t *dev, ina3221_channel_t channel, float current)
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{
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int16_t raw_value = current*dev->shunt[channel]*0.2; // format
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return _wireWriteRegister(&dev->i2c_dev,INA3221_REG_CRITICAL_ALERT_1+channel*2, *(uint16_t*)&raw_value);
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}
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int ina3221_setWarningAlert(ina3221_t *dev, ina3221_channel_t channel, float current)
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{
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int16_t raw_value = current*dev->shunt[channel]*0.2 ; // format
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return _wireWriteRegister(&dev->i2c_dev,INA3221_REG_WARNING_ALERT_1+channel*2, *(uint16_t*)&raw_value);
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}
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int ina3221_setSumWarningAlert(ina3221_t *dev, float voltage)
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{
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int16_t raw_value = voltage*50.0 ; // format
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return _wireWriteRegister(&dev->i2c_dev,INA3221_REG_SHUNT_VOLTAGE_SUM_LIMIT, *(uint16_t*)&raw_value);
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}
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int ina3221_setPowerValidUpperLimit(ina3221_t *dev, float voltage)
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{
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if(!dev->config.ebus)
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{
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debug("Bus not enable. Dev:%u:%X\n", dev->bus, dev->addr);
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return -ENOTSUP;
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}
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int16_t raw_value = voltage*1000.0; //format
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return _wireWriteRegister(&dev->i2c_dev,INA3221_REG_VALID_POWER_UPPER_LIMIT, *(uint16_t*)&raw_value);
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}
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int ina3221_setPowerValidLowerLimit(ina3221_t *dev, float voltage)
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{
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if(!dev->config.ebus)
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{
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debug("Bus not enable. Dev:%u:%X\n", dev->bus, dev->addr);
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return -ENOTSUP;
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}
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int16_t raw_value = voltage*1000.0; // round and format
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return _wireWriteRegister(&dev->i2c_dev,INA3221_REG_VALID_POWER_LOWER_LIMIT, *(uint16_t*)&raw_value);
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}
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