HAL I2C timeout flag

[Filipx.87]

I have a simple function that reads one byte from I2C and I need the RxdFlag variable to be cleared in case of unsuccessful transfer (timeout) and I don't know how to get it from the HAL_StatusTypeDef structure. Thanx for your help.

uint8_t  GetSlaveInfo (uint8_t *value)
{
 uint8_t RxdFlag = 1;
 HAL_I2C_Master_Receive(&hi2c1, EE_I2C_ADDR << 1, value, 1, 50);
 return RxdFlag;
}

[Pavel A. · Accepted solution]

uint8_t  GetSlaveInfo (uint8_t *value)
{
 uint8_t RxdFlag = 0;
 HAL_StatusTypeDef st =
 HAL_I2C_Master_Receive(&hi2c1, EE_I2C_ADDR << 1, value, 1, 50);
 if (st == HAL_OK)
    RxdFlag = 1;
 return RxdFlag;
}

What should your function return in case of other errors besides of timeout?

[Piranha]

uint8_t GetSlaveInfo(uint8_t *value)
{
	HAL_StatusTypeDef st = HAL_I2C_Master_Receive(&hi2c1, EE_I2C_ADDR << 1, value, 1, 50);
	return (st == HAL_OK);
}

uint8_t GetSlaveInfo(uint8_t *value)
{
	return (HAL_I2C_Master_Receive(&hi2c1, EE_I2C_ADDR << 1, value, 1, 50) == HAL_OK);
}

 Often I don't understand why people write so much useless code...