uart: Fix unwanted processing of TX_DONE interrupt immediately after calling uart_wait_tx_done()
In previous transmission(s), the TX_DONE interrupt raw bit may be raised, but never been cleared.
TX_DONE interrrupt status bit should be cleared before enabling it to check the new transmission.
Introduced in
@@ -1142,6 +1142,9 @@ esp_err_t uart_wait_tx_done(uart_port_t uart_num, TickType_t ticks_to_wait)
xSemaphoreGive(p_uart_obj[uart_num]->tx_mux);
return ESP_OK;
}
+ if (!UART_IS_MODE_SET(uart_num, UART_MODE_RS485_HALF_DUPLEX)) {
+ uart_hal_clr_intsts_mask(&(uart_context[uart_num].hal), UART_INTR_TX_DONE);
+ }
UART_ENTER_CRITICAL(&(uart_context[uart_num].spinlock));
uart_hal_ena_intr_mask(&(uart_context[uart_num].hal), UART_INTR_TX_DONE);
UART_EXIT_CRITICAL(&(uart_context[uart_num].spinlock));
