I am using the following code:
while(HAL_I2C_Master_Transmit(&hi2c1, DEVICE_ADDR, i2cbuffer, 1, 1000) != HAL_OK)
{
/* Error_Handler() function is called when Timeout error occurs.
When Acknowledge failure occurs (Slave doesn't acknowledge its address)
Master restarts communication */
if (HAL_I2C_GetError(&hi2c1) != HAL_I2C_ERROR_AF)
{
errorcount = 20;
Error_Handler();
}
The routine error handler basically is a while(1) that toggles an led and never exits. I'm trying to trap the errors, mostly I'm getting a NACK error, with the following code:
/* I2C not acknowlege NACK flag ---------------------------------------------*/
if (I2C_CHECK_FLAG(itflags, I2C_FLAG_AF) != RESET)
{
hi2c1.ErrorCode |= HAL_I2C_ERROR_AF;
/* Clear NACK flag */
__HAL_I2C_CLEAR_FLAG(&hi2c1, I2C_FLAG_AF);
}
/* I2C Bus error interrupt occurred ------------------------------------*/
if (I2C_CHECK_FLAG(itflags, I2C_FLAG_BERR) != RESET)
{
hi2c1.ErrorCode |= HAL_I2C_ERROR_BERR;
/* Clear BERR flag */
__HAL_I2C_CLEAR_FLAG(&hi2c1, I2C_FLAG_BERR);
}
etc. Even though my mainline code sets the AF flag and errorcount to 20 the line
if (I2C_CHECK_FLAG(itflags, I2C_FLAG_AF) != RESET) checks good.
What registers should I look at to determine the source of the error and how do i reset that errror? I'm running as a master talking to one slave.
Thanks
