Hi,
Currently I am implementing the smbalert functionality for ltc4015 based battery charger.
But when I am using the below mentioned code(commented section) inside isr it is returning communication error.
//SMBALERT interrupt from ltc4015 to stm32l0
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
HAL_StatusTypeDef ret;
uint8_t buf[1];
uint8_t read_buf_word[2];
smbalert_flag = 1;//set the smbalert_flag
//step-1
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_7,GPIO_PIN_RESET);//RESET PIN cleared of PCA9546A
//HAL_Delay(1);//put some delay
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_7,GPIO_PIN_SET);//RESET PIN set of PCA9546A
//HAL_Delay(1);//put some delay
//step-2
buf[0] = CONTROL_REG1;
ret = HAL_I2C_Master_Transmit(&hi2c1,PCA9546A_DEVICE_ADDRESS,buf,1,HAL_MAX_DELAY);//select channel 0 for i2c switch
if (ret != HAL_OK)
{
Error_Handler();
}
// //read limit_alerts
// ret = HAL_I2C_Mem_Read(&hi2c1,LTC4015_DEVICE_ADDRESS_READ,0x36,I2C_MEMADD_SIZE_8BIT,read_buf_word, 2,HAL_MAX_DELAY);
// if (ret != HAL_OK)
// {
// Error_Handler();
// }
// limit_alert_value = ((uint16_t)read_buf_word[0] | ((uint16_t)read_buf_word[1] << 8));
}
so kindly inform me as soon as possible what could be the possible reason for this. And how to solve this problem.
Thanks & Regards
Satyabrata Senapati(vasmed)
