/** Abort the ongoing TX transaction. It disables the enabled interupt for TX and
* flushes the TX hardware buffer if TX FIFO is used
*
* @param obj The serial object
*/
void serial_tx_abort_asynch(serial_t *obj)
{
struct serial_s *p_obj = GET_SERIAL_S(obj);
usart_interrupt_disable(p_obj->uart, USART_INT_TC);
usart_interrupt_disable(p_obj->uart, USART_INT_TBE);
usart_flag_clear(p_obj->uart, USART_FLAG_TC);
p_obj->tx_count = 0;
p_obj->tx_state = OP_STATE_READY;
}
/**
* Uart common interrupt process. This need add to uart ISR.
*
* @param serial serial device
*/
static void uart_isr(struct rt_serial_device *serial)
{
struct gd32_uart *uart = (struct gd32_uart *) serial->parent.user_data;
RT_ASSERT(uart != RT_NULL);
/* UART in mode Receiver */
if ((usart_interrupt_flag_get(uart->uart_periph, USART_INT_FLAG_RBNE) != RESET) &&
(usart_flag_get(uart->uart_periph, USART_FLAG_RBNE) != RESET))
{
rt_hw_serial_isr(serial, RT_SERIAL_EVENT_RX_IND);
/* Clear RXNE interrupt flag */
usart_flag_clear(uart->uart_periph, USART_FLAG_RBNE);
}
}
/** Abort the ongoing RX transaction. It disables the enabled interrupt for RX and
* flushes the RX hardware buffer if RX FIFO is used
*
* @param obj The serial object
*/
void serial_rx_abort_asynch(serial_t *obj)
{
struct serial_s *p_obj = GET_SERIAL_S(obj);
/* disable interrupts */
usart_interrupt_disable(p_obj->uart, USART_INT_RBNE);
usart_interrupt_disable(p_obj->uart, USART_INT_PERR);
usart_interrupt_disable(p_obj->uart, USART_INT_ERR);
/* clear USART_FLAG_RBNE flag */
usart_flag_clear(p_obj->uart, USART_FLAG_RBNE);
/* clear errors flag by reading USART STATx register and then USART DATA register */
usart_flag_get(p_obj->uart, USART_FLAG_PERR);
usart_flag_get(p_obj->uart, USART_FLAG_FERR);
usart_flag_get(p_obj->uart, USART_FLAG_ORERR);
USART_DATA(p_obj->uart);
/* reset rx transfer count */
p_obj->rx_count = 0;
/* reset rx state */
p_obj->rx_state = OP_STATE_READY;
}
