Posted on March 20, 2015 at 11:39Hello,
In multiple places in the UART HAL (in all the variants of HAL_UART_Receive) one can find the following code:
/* Check if a transmit process is ongoing or not */
if(huart->State == HAL_UART_STATE_BUSY_TX)
{
huart->State = HAL_UART_STATE_BUSY_TX_RX;
}
else
{
huart->State = HAL_UART_STATE_BUSY_RX;
}
This code may be interrupted in case of completion of transmit buffer, and the interrupt service routine may change the value of huart->State .
The above code should be either protected from interrupt or better replaced by an atomic instruction (which seems fairly easy looking at the possible values of huart->state.
Gerard
