/**
* @file BSP_INA.c
* @brief Driver for the BSP INA219 module
*
* This file provides a driver for the BSP INA219 module, which is used to measure voltage and current values.
* The driver includes functions for initializing the module, reading the current and voltage values, and calculating the power value.
* All of these functions are wrapped in a mutex lock to ensure consistent reading of the values.
*/

#include "BSP_INA.h"
#include "i2c.h"
#include "INA219.h"
#include "cmsis_os2.h"

#define BSP_INA_I2C &hi2c1
#define BSP_INA_ADDRESS INA219_ADDRESS | 0x05
#define BSP_INA_MUTEX_TIMEOUT osWaitForever

static INA219_t hina = {0}; 
static osMutexId_t ina_lock = NULL;

/**
* @brief Initializes the INA219 module and sets up the I2C bus.
*/
void BSP_INA_Init(void) {
    INA219_Init(&hina, BSP_INA_I2C, BSP_INA_ADDRESS);

    ina_lock = osMutexNew(NULL);
    // default done by Init
    // INA219_Reset(ina219);
    // INA219_setCalibration_32V_2A(&hina);
}


/**
* @brief Reads the voltage value from the INA219.
* 
* This function acquires a mutex to ensure that the voltage value is read consistently.
* The mutex is released after the value has been read.
*
* @return The voltage value in milli Volts (mV)
*/
uint16_t BSP_INA_Voltage() {
    osMutexAcquire(ina_lock,BSP_INA_MUTEX_TIMEOUT);
    uint16_t result = INA219_ReadBusVoltage(&hina);
    osMutexRelease(ina_lock);
    return result;
}

/**
* @brief Reads the current value from the INA219.
* 
* This function acquires a mutex to ensure that the current value is read consistently.
* The mutex is released after the value has been read.
*
* @return The current value in 10 milli Amperes (10mA)
*/
uint16_t BSP_INA_Current() {
    osMutexAcquire(ina_lock,BSP_INA_MUTEX_TIMEOUT);
    uint16_t result = INA219_ReadCurrent(&hina);
    osMutexRelease(ina_lock);
    return result;
}

/**
* @brief Reads the power value from the INA219.
* 
* This function acquires a mutex to ensure that the power value is read consistently.
* The mutex is released after the value has been read.
*
* @return The power value in micro Watts (uW)
*/
uint32_t BSP_INA_Power() {
    osMutexAcquire(ina_lock,BSP_INA_MUTEX_TIMEOUT);
    uint16_t result_current = INA219_ReadCurrent(&hina);
    uint16_t result_voltage = INA219_ReadBusVoltage(&hina);
    osMutexRelease(ina_lock);
    return (result_current*10) * result_voltage;
}