charge_controller_v7/i2c_target.c

#include "i2c_target.h"
#include "battery.h"
#include "adc.h"
#include "ti/driverlib/dl_i2c.h"
#include "ti_msp_dl_config.h"
#include <stdio.h>
#include <stdint.h>

//Global buffer for I2C 

BatteryData battery_data;
BatteryLimitMsg battery_limits;

//Flag for Pi INTERRUPTS:
volatile bool piRxComplete;
volatile bool piTxComplete;

uint8_t piTxPacket[I2C_TX_MAX_PACKET_SIZE_PI];
uint8_t piRxPacket[I2C_RX_MAX_PACKET_SIZE_PI];

uint32_t piTxLen, piTxCount;
uint32_t piRxLen, piRxCount;
/*
- command: as defined in the Wiki for Pi 0x01, 0x02, 0x03, refer to i2c_target.h file
- slot_id: battery slot numner from 0 to NUM_SLOTS-1
- data: pointer to SET battery limits
- len: length of the data

*/


// for testing:
//Battery batteries[NUM_SLOTS] = {
//    {0, STATE_BATTERY_DETECTED, 3700, 500, 25, 3000, 4200, 2000, 10000, 80}
//};


void Battery_ReadState(uint8_t slot_id){
    
    uint16_t voltage_mv= batteries[slot_id].voltage;
    uint16_t min_voltage= batteries[slot_id].min_voltage;
    uint16_t max_voltage= batteries[slot_id].max_voltage;

    //Testing:
    if(voltage_mv< 500){
        batteries[slot_id].state= STATE_EMPTY;
    }

    else if(voltage_mv>=500 && voltage_mv< 3000){
        batteries[slot_id].state= STATE_BATTERY_DETECTED;
    }
    else if(voltage_mv >=3000 && voltage_mv< 4200){
        batteries[slot_id].state= STATE_MEASUREMENT_IN_PROGRESS;
    }
    // once MCU is done reading ADC:
    else if(!(DL_I2C_getControllerStatus(I2C_controller_INST) & DL_I2C_CONTROLLER_STATUS_BUSY_BUS)) {
        batteries[slot_id].state= STATE_MEASUREMENT_DONE;
    }
    else{
        batteries[slot_id].state= STATE_OVERCHARGING;
    }    
}