[drivers][serial_v2]修复DMA+TX阻塞模式异常 (#6781)

wdfk-prog · web-flow · commit 8f0cef3a87ef · 2023-01-05T01:25:16.000-05:00
* [drivers][serial_v2]修复DMA+TX阻塞模式异常
diff --git a/components/drivers/serial/serial_v2.c b/components/drivers/serial/serial_v2.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006-2021, RT-Thread Development Team
+ * Copyright (c) 2006-2022, RT-Thread Development Team
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -694,6 +694,7 @@ static rt_err_t rt_serial_tx_enable(struct rt_device        *dev,
 
         tx_fifo->activated = RT_FALSE;
         tx_fifo->put_size = 0;
+        rt_memset(&tx_fifo->rb, RT_NULL, sizeof(tx_fifo->rb));
         rt_completion_init(&(tx_fifo->tx_cpt));
         dev->open_flag |= RT_SERIAL_TX_BLOCKING;
 

Original file line number	Diff line number	Diff line change
`@@ -1,5 +1,5 @@`
`1`	`1`	`/*`
`2`		`- * Copyright (c) 2006-2021, RT-Thread Development Team`
	`2`	`+ * Copyright (c) 2006-2022, RT-Thread Development Team`
`3`	`3`	`*`
`4`	`4`	`* SPDX-License-Identifier: Apache-2.0`
`5`	`5`	`*`
`@@ -694,6 +694,7 @@ static rt_err_t rt_serial_tx_enable(struct rt_device *dev,`
`694`	`694`
`695`	`695`	`tx_fifo->activated = RT_FALSE;`
`696`	`696`	`tx_fifo->put_size = 0;`
	`697`	`+ rt_memset(&tx_fifo->rb, RT_NULL, sizeof(tx_fifo->rb));`
`697`	`698`	`rt_completion_init(&(tx_fifo->tx_cpt));`
`698`	`699`	`dev->open_flag \|= RT_SERIAL_TX_BLOCKING;`
`699`	`700`