[serial] 优化发送非阻塞时，serial_close未执行rt_completion_done的问题。

bsp/stm32/libraries/HAL_Drivers/drv_usart_v2.c

@@ -456,6 +456,7 @@ static void uart_isr(struct rt_serial_device *serial)
     {
         if (__HAL_UART_GET_FLAG(&(uart->handle), UART_FLAG_ORE) != RESET)
         {
+            LOG_E("(%s) serial device Overrun error!", serial->parent.parent.name);
             __HAL_UART_CLEAR_OREFLAG(&uart->handle);
         }
         if (__HAL_UART_GET_FLAG(&(uart->handle), UART_FLAG_NE) != RESET)

components/drivers/include/drivers/serial_v2.h

@@ -118,8 +118,6 @@ struct rt_serial_rx_fifo
 {
     struct rt_ringbuffer rb;
 
-    rt_uint16_t rx_index;
-
     struct rt_completion rx_cpt;
 
     rt_uint16_t rx_cpt_index;

components/drivers/serial/SConscript

@@ -2,6 +2,7 @@ from building import *
 
 cwd = GetCurrentDir()
 CPPPATH = [cwd + '/../include']
+group = []
 if GetDepend(['RT_USING_SERIAL']):
     if GetDepend(['RT_USING_SERIAL_V2']):
         src = Glob('serial_v2.c')

components/drivers/serial/serial_v2.c

@@ -726,7 +726,6 @@ static rt_err_t rt_serial_rx_enable(struct rt_device        *dev,
     RT_ASSERT(rx_fifo != RT_NULL);
     rt_ringbuffer_init(&(rx_fifo->rb), rx_fifo->buffer, serial->config.rx_bufsz);
 
-    rx_fifo->rx_index = serial->config.rx_bufsz;
     serial->serial_rx = rx_fifo;
     dev->read = _serial_fifo_rx;
 
@@ -813,6 +812,9 @@ static rt_err_t rt_serial_tx_disable(struct rt_device        *dev,
     dev->write = RT_NULL;
     if (serial->serial_tx == RT_NULL) return RT_EOK;
 
+    tx_fifo = (struct rt_serial_tx_fifo *)serial->serial_tx;
+    RT_ASSERT(tx_fifo != RT_NULL);
+
     do
     {
         if (tx_oflag == RT_SERIAL_TX_NON_BLOCKING)
@@ -825,14 +827,13 @@ static rt_err_t rt_serial_tx_disable(struct rt_device        *dev,
             break;
         }
 
+        rt_completion_done(&(tx_fifo->tx_cpt));
         dev->open_flag &= ~ RT_SERIAL_TX_BLOCKING;
         serial->ops->control(serial,
                             RT_DEVICE_CTRL_CLR_INT,
                             (void *)RT_SERIAL_TX_BLOCKING);
     } while (0);
 
-    tx_fifo = (struct rt_serial_tx_fifo *)serial->serial_tx;
-    RT_ASSERT(tx_fifo != RT_NULL);
     rt_free(tx_fifo);
     serial->serial_tx = RT_NULL;
 
@@ -876,6 +877,13 @@ static rt_err_t rt_serial_open(struct rt_device *dev, rt_uint16_t oflag)
     RT_ASSERT(dev != RT_NULL);
     serial = (struct rt_serial_device *)dev;
 
+    /* Check that the device has been turned on */
+    if ((dev->open_flag) & (15 << 12))
+    {
+        LOG_D("(%s) serial device has already been opened, it will run in its original configuration", dev->parent.name);
+        return RT_EOK;
+    }
+
     LOG_D("open serial device: 0x%08x with open flag: 0x%04x",
         dev, oflag);