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体验新版 GitCode,发现更多精彩内容 >>
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98c830f3
编写于
5月 24, 2017
作者:
armink_ztl
浏览文件
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电子邮件补丁
差异文件
[BSP] Fix a bug on stm32f4xx uart rx DMA driver when first receive data filled the FIFO.
上级
9b7d2023
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
8 addition
and
24 deletion
+8
-24
bsp/stm32f40x/drivers/usart.c
bsp/stm32f40x/drivers/usart.c
+8
-24
未找到文件。
bsp/stm32f40x/drivers/usart.c
浏览文件 @
98c830f3
...
...
@@ -242,15 +242,7 @@ static void dma_uart_rx_idle_isr(struct rt_serial_device *serial) {
level
=
rt_hw_interrupt_disable
();
recv_total_index
=
uart
->
dma
.
setting_recv_len
-
DMA_GetCurrDataCounter
(
uart
->
dma
.
rx_stream
);
if
(
recv_total_index
>=
uart
->
dma
.
last_recv_index
)
{
recv_len
=
recv_total_index
-
uart
->
dma
.
last_recv_index
;
}
else
{
recv_len
=
uart
->
dma
.
setting_recv_len
-
uart
->
dma
.
last_recv_index
+
recv_total_index
;
}
recv_len
=
recv_total_index
-
uart
->
dma
.
last_recv_index
;
uart
->
dma
.
last_recv_index
=
recv_total_index
;
/* enable interrupt */
rt_hw_interrupt_enable
(
level
);
...
...
@@ -269,7 +261,7 @@ static void dma_uart_rx_idle_isr(struct rt_serial_device *serial) {
static
void
dma_rx_done_isr
(
struct
rt_serial_device
*
serial
)
{
struct
stm32_uart
*
uart
=
(
struct
stm32_uart
*
)
serial
->
parent
.
user_data
;
rt_size_t
recv_
total_index
,
recv_
len
;
rt_size_t
recv_len
;
rt_base_t
level
;
if
(
DMA_GetFlagStatus
(
uart
->
dma
.
rx_stream
,
uart
->
dma
.
rx_flag
)
!=
RESET
)
...
...
@@ -277,17 +269,9 @@ static void dma_rx_done_isr(struct rt_serial_device *serial)
/* disable interrupt */
level
=
rt_hw_interrupt_disable
();
recv_total_index
=
uart
->
dma
.
setting_recv_len
-
DMA_GetCurrDataCounter
(
uart
->
dma
.
rx_stream
);
if
(
recv_total_index
>=
uart
->
dma
.
last_recv_index
)
{
recv_len
=
recv_total_index
-
uart
->
dma
.
last_recv_index
;
}
else
{
recv_len
=
uart
->
dma
.
setting_recv_len
-
uart
->
dma
.
last_recv_index
+
recv_total_index
;
}
uart
->
dma
.
last_recv_index
=
recv_total_index
;
recv_len
=
uart
->
dma
.
setting_recv_len
-
uart
->
dma
.
last_recv_index
;
/* reset last recv index */
uart
->
dma
.
last_recv_index
=
0
;
/* enable interrupt */
rt_hw_interrupt_enable
(
level
);
...
...
@@ -639,8 +623,8 @@ static void NVIC_Configuration(struct stm32_uart *uart)
/* Enable the USART1 Interrupt */
NVIC_InitStructure
.
NVIC_IRQChannel
=
uart
->
irq
;
NVIC_InitStructure
.
NVIC_IRQChannelPreemptionPriority
=
3
;
NVIC_InitStructure
.
NVIC_IRQChannelSubPriority
=
0
;
NVIC_InitStructure
.
NVIC_IRQChannelPreemptionPriority
=
0
;
NVIC_InitStructure
.
NVIC_IRQChannelSubPriority
=
1
;
NVIC_InitStructure
.
NVIC_IRQChannelCmd
=
ENABLE
;
NVIC_Init
(
&
NVIC_InitStructure
);
}
...
...
@@ -668,7 +652,7 @@ static void DMA_Configuration(struct rt_serial_device *serial) {
/* rx dma interrupt config */
NVIC_InitStructure
.
NVIC_IRQChannel
=
uart
->
dma
.
rx_irq_ch
;
NVIC_InitStructure
.
NVIC_IRQChannelPreemptionPriority
=
0
;
NVIC_InitStructure
.
NVIC_IRQChannelSubPriority
=
1
;
NVIC_InitStructure
.
NVIC_IRQChannelSubPriority
=
0
;
NVIC_InitStructure
.
NVIC_IRQChannelCmd
=
ENABLE
;
NVIC_Init
(
&
NVIC_InitStructure
);
}
...
...
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