Skip to content
体验新版
项目
组织
正在加载...
登录
切换导航
打开侧边栏
码匠许师傅
rt-thread
提交
cebbee79
R
rt-thread
项目概览
码匠许师傅
/
rt-thread
与 Fork 源项目一致
Fork自
RT-Thread / rt-thread
通知
1
Star
0
Fork
0
代码
文件
提交
分支
Tags
贡献者
分支图
Diff
Issue
0
列表
看板
标记
里程碑
合并请求
0
DevOps
流水线
流水线任务
计划
Wiki
0
Wiki
分析
仓库
DevOps
项目成员
Pages
R
rt-thread
项目概览
项目概览
详情
发布
仓库
仓库
文件
提交
分支
标签
贡献者
分支图
比较
Issue
0
Issue
0
列表
看板
标记
里程碑
合并请求
0
合并请求
0
Pages
DevOps
DevOps
流水线
流水线任务
计划
分析
分析
仓库分析
DevOps
Wiki
0
Wiki
成员
成员
收起侧边栏
关闭侧边栏
动态
分支图
创建新Issue
流水线任务
提交
Issue看板
体验新版 GitCode,发现更多精彩内容 >>
提交
cebbee79
编写于
3月 17, 2017
作者:
armink_ztl
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
[BSP] Enhanced stm32f40x serial DMA rx driver reliability.
上级
afe3b161
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
35 addition
and
15 deletion
+35
-15
bsp/stm32f40x/drivers/usart.c
bsp/stm32f40x/drivers/usart.c
+35
-15
未找到文件。
bsp/stm32f40x/drivers/usart.c
浏览文件 @
cebbee79
...
...
@@ -70,7 +70,8 @@ struct stm32_uart
{
USART_TypeDef
*
uart_device
;
IRQn_Type
irq
;
struct
stm32_uart_dma
{
struct
stm32_uart_dma
{
/* dma stream */
DMA_Stream_TypeDef
*
rx_stream
;
/* dma channel */
...
...
@@ -200,7 +201,8 @@ static int stm32_getc(struct rt_serial_device *serial)
* @param mem_base_addr memory 0 base address for DMA stream
*/
static
void
dma_uart_config
(
struct
rt_serial_device
*
serial
,
uint32_t
setting_recv_len
,
void
*
mem_base_addr
)
{
void
*
mem_base_addr
)
{
struct
stm32_uart
*
uart
=
(
struct
stm32_uart
*
)
serial
->
parent
.
user_data
;
DMA_InitTypeDef
DMA_InitStructure
;
...
...
@@ -234,16 +236,26 @@ static void dma_uart_config(struct rt_serial_device *serial, uint32_t setting_re
static
void
dma_uart_rx_idle_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_base_t
level
;
/* 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
)
{
if
(
recv_total_index
>=
uart
->
dma
.
last_recv_index
)
{
recv_len
=
recv_total_index
-
uart
->
dma
.
last_recv_index
;
}
else
{
}
else
{
recv_len
=
uart
->
dma
.
setting_recv_len
-
uart
->
dma
.
last_recv_index
+
recv_total_index
;
}
uart
->
dma
.
last_recv_index
=
recv_total_index
;
/* enable interrupt */
rt_hw_interrupt_enable
(
level
);
rt_hw_serial_isr
(
serial
,
RT_SERIAL_EVENT_RX_DMADONE
|
(
recv_len
<<
8
));
if
(
recv_len
)
rt_hw_serial_isr
(
serial
,
RT_SERIAL_EVENT_RX_DMADONE
|
(
recv_len
<<
8
));
/* read a data for clear receive idle interrupt flag */
USART_ReceiveData
(
uart
->
uart_device
);
...
...
@@ -254,28 +266,35 @@ static void dma_uart_rx_idle_isr(struct rt_serial_device *serial) {
*
* @param serial serial device
*/
static
void
dma_rx_done_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_base_t
level
;
if
(
DMA_GetFlagStatus
(
uart
->
dma
.
rx_stream
,
uart
->
dma
.
rx_flag
)
!=
RESET
)
{
/* disable dma, stop receive data */
DMA_Cmd
(
uart
->
dma
.
rx_stream
,
DISABLE
);
if
(
DMA_GetFlagStatus
(
uart
->
dma
.
rx_stream
,
uart
->
dma
.
rx_flag
)
!=
RESET
)
{
/* 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
)
{
if
(
recv_total_index
>=
uart
->
dma
.
last_recv_index
)
{
recv_len
=
recv_total_index
-
uart
->
dma
.
last_recv_index
;
}
else
{
}
else
{
recv_len
=
uart
->
dma
.
setting_recv_len
-
uart
->
dma
.
last_recv_index
+
recv_total_index
;
uart
->
dma
.
last_recv_index
=
recv_total_index
;
}
uart
->
dma
.
last_recv_index
=
recv_total_index
;
/* enable interrupt */
rt_hw_interrupt_enable
(
level
);
rt_hw_serial_isr
(
serial
,
RT_SERIAL_EVENT_RX_DMADONE
|
(
recv_len
<<
8
));
if
(
recv_len
)
rt_hw_serial_isr
(
serial
,
RT_SERIAL_EVENT_RX_DMADONE
|
(
recv_len
<<
8
));
/* start receive data */
DMA_ClearFlag
(
uart
->
dma
.
rx_stream
,
uart
->
dma
.
rx_flag
);
DMA_Cmd
(
uart
->
dma
.
rx_stream
,
ENABLE
);
}
}
...
...
@@ -284,7 +303,8 @@ static void dma_rx_done_isr(struct rt_serial_device *serial) {
*
* @param serial serial device
*/
static
void
uart_isr
(
struct
rt_serial_device
*
serial
)
{
static
void
uart_isr
(
struct
rt_serial_device
*
serial
)
{
struct
stm32_uart
*
uart
=
(
struct
stm32_uart
*
)
serial
->
parent
.
user_data
;
RT_ASSERT
(
uart
!=
RT_NULL
);
...
...
编辑
预览
Markdown
is supported
0%
请重试
或
添加新附件
.
添加附件
取消
You are about to add
0
people
to the discussion. Proceed with caution.
先完成此消息的编辑!
取消
想要评论请
注册
或
登录