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体验新版 GitCode,发现更多精彩内容 >>
提交
08f861f8
编写于
3月 18, 2017
作者:
B
Bernard Xiong
提交者:
GitHub
3月 18, 2017
浏览文件
操作
浏览文件
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差异文件
Merge pull request #706 from armink/serial_rx_dma
[DeviceDrivers] 增强串口 DMA 接收驱动的可靠性
上级
282c2f22
82930906
变更
3
隐藏空白更改
内联
并排
Showing
3 changed file
with
137 addition
and
82 deletion
+137
-82
bsp/stm32f10x/drivers/usart.c
bsp/stm32f10x/drivers/usart.c
+54
-37
bsp/stm32f40x/drivers/usart.c
bsp/stm32f40x/drivers/usart.c
+35
-15
components/drivers/serial/serial.c
components/drivers/serial/serial.c
+48
-30
未找到文件。
bsp/stm32f10x/drivers/usart.c
浏览文件 @
08f861f8
...
...
@@ -48,15 +48,18 @@ struct stm32_uart
{
USART_TypeDef
*
uart_device
;
IRQn_Type
irq
;
struct
stm32_uart_dma
{
struct
stm32_uart_dma
{
/* dma channel */
DMA_Channel_TypeDef
*
rx_ch
;
/* dma global flag */
uint32_t
rx_gl_flag
;
/* dma irq channel */
uint8_t
rx_irq_ch
;
/* setting receive len */
rt_size_t
setting_recv_len
;
/* last receive index */
rt_size_t
last_recv_
len
;
rt_size_t
last_recv_
index
;
}
dma
;
};
...
...
@@ -145,15 +148,15 @@ static int stm32_putc(struct rt_serial_device *serial, char c)
RT_ASSERT
(
serial
!=
RT_NULL
);
uart
=
(
struct
stm32_uart
*
)
serial
->
parent
.
user_data
;
if
(
serial
->
parent
.
open_flag
&
RT_DEVICE_FLAG_INT_TX
)
if
(
serial
->
parent
.
open_flag
&
RT_DEVICE_FLAG_INT_TX
)
{
if
(
!
(
uart
->
uart_device
->
SR
&
USART_FLAG_TXE
))
{
USART_ITConfig
(
uart
->
uart_device
,
USART_IT_TC
,
ENABLE
);
return
-
1
;
}
uart
->
uart_device
->
DR
=
c
;
USART_ITConfig
(
uart
->
uart_device
,
USART_IT_TC
,
ENABLE
);
if
(
!
(
uart
->
uart_device
->
SR
&
USART_FLAG_TXE
))
{
USART_ITConfig
(
uart
->
uart_device
,
USART_IT_TC
,
ENABLE
);
return
-
1
;
}
uart
->
uart_device
->
DR
=
c
;
USART_ITConfig
(
uart
->
uart_device
,
USART_IT_TC
,
ENABLE
);
}
else
{
...
...
@@ -188,24 +191,31 @@ static int stm32_getc(struct rt_serial_device *serial)
*/
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_len
,
recv_len
;
/* disable dma, stop receive data */
DMA_Cmd
(
uart
->
dma
.
rx_ch
,
DISABLE
);
recv_total_len
=
serial
->
config
.
bufsz
-
DMA_GetCurrDataCounter
(
uart
->
dma
.
rx_ch
);
if
(
recv_total_len
>
uart
->
dma
.
last_recv_len
)
{
recv_len
=
recv_total_len
-
uart
->
dma
.
last_recv_len
;
}
else
{
recv_len
=
recv_total_len
;
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_ch
);
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_len
=
recv_total_len
;
rt_hw_serial_isr
(
serial
,
RT_SERIAL_EVENT_RX_DMADONE
|
(
recv_len
<<
8
));
uart
->
dma
.
last_recv_index
=
recv_total_index
;
/* enable interrupt */
rt_hw_interrupt_enable
(
level
);
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
);
DMA_ClearFlag
(
uart
->
dma
.
rx_gl_flag
);
DMA_Cmd
(
uart
->
dma
.
rx_ch
,
ENABLE
);
}
/**
...
...
@@ -215,24 +225,29 @@ 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_len
,
recv_len
;
/* disable dma, stop receive data */
DMA_Cmd
(
uart
->
dma
.
rx_ch
,
DISABLE
);
recv_total_len
=
serial
->
config
.
bufsz
-
DMA_GetCurrDataCounter
(
uart
->
dma
.
rx_ch
);
if
(
recv_total_len
>
uart
->
dma
.
last_recv_len
)
{
recv_len
=
recv_total_len
-
uart
->
dma
.
last_recv_len
;
}
else
{
recv_len
=
recv_total_len
;
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_ch
);
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_len
=
recv_total_len
;
rt_hw_serial_isr
(
serial
,
RT_SERIAL_EVENT_RX_DMADONE
|
(
recv_len
<<
8
));
uart
->
dma
.
last_recv_index
=
recv_total_index
;
/* enable interrupt */
rt_hw_interrupt_enable
(
level
);
if
(
recv_len
)
rt_hw_serial_isr
(
serial
,
RT_SERIAL_EVENT_RX_DMADONE
|
(
recv_len
<<
8
));
DMA_ClearFlag
(
uart
->
dma
.
rx_gl_flag
);
/* reload */
DMA_SetCurrDataCounter
(
uart
->
dma
.
rx_ch
,
serial
->
config
.
bufsz
);
DMA_Cmd
(
uart
->
dma
.
rx_ch
,
ENABLE
);
}
/**
...
...
@@ -527,6 +542,8 @@ static void DMA_Configuration(struct rt_serial_device *serial) {
DMA_InitTypeDef
DMA_InitStructure
;
NVIC_InitTypeDef
NVIC_InitStructure
;
uart
->
dma
.
setting_recv_len
=
serial
->
config
.
bufsz
;
/* enable transmit idle interrupt */
USART_ITConfig
(
uart
->
uart_device
,
USART_IT_IDLE
,
ENABLE
);
...
...
@@ -544,7 +561,7 @@ static void DMA_Configuration(struct rt_serial_device *serial) {
DMA_InitStructure
.
DMA_MemoryInc
=
DMA_MemoryInc_Enable
;
DMA_InitStructure
.
DMA_PeripheralDataSize
=
DMA_PeripheralDataSize_Byte
;
DMA_InitStructure
.
DMA_MemoryDataSize
=
DMA_MemoryDataSize_Byte
;
DMA_InitStructure
.
DMA_Mode
=
DMA_Mode_
Normal
;
DMA_InitStructure
.
DMA_Mode
=
DMA_Mode_
Circular
;
DMA_InitStructure
.
DMA_Priority
=
DMA_Priority_High
;
DMA_InitStructure
.
DMA_M2M
=
DMA_M2M_Disable
;
DMA_Init
(
uart
->
dma
.
rx_ch
,
&
DMA_InitStructure
);
...
...
bsp/stm32f40x/drivers/usart.c
浏览文件 @
08f861f8
...
...
@@ -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
);
...
...
components/drivers/serial/serial.c
浏览文件 @
08f861f8
...
...
@@ -166,14 +166,15 @@ rt_inline int _serial_int_tx(struct rt_serial_device *serial, const rt_uint8_t *
*
* @return length
*/
static
rt_size_t
rt_dma_calc_recved_len
(
struct
rt_serial_device
*
serial
)
{
static
rt_size_t
rx_length
;
struct
rt_serial_rx_fifo
*
rx_fifo
=
(
struct
rt_serial_rx_fifo
*
)
serial
->
serial_rx
;
static
rt_size_t
rt_dma_calc_recved_len
(
struct
rt_serial_device
*
serial
)
{
rt_size_t
rx_length
;
struct
rt_serial_rx_fifo
*
rx_fifo
=
(
struct
rt_serial_rx_fifo
*
)
serial
->
serial_rx
;
RT_ASSERT
(
rx_fifo
!=
RT_NULL
);
rx_length
=
(
rx_fifo
->
put_index
>=
rx_fifo
->
get_index
)
?
(
rx_fifo
->
put_index
-
rx_fifo
->
get_index
)
:
(
serial
->
config
.
bufsz
-
(
rx_fifo
->
get_index
-
rx_fifo
->
put_index
));
rx_length
=
(
rx_fifo
->
put_index
>=
rx_fifo
->
get_index
)
?
(
rx_fifo
->
put_index
-
rx_fifo
->
get_index
)
:
(
serial
->
config
.
bufsz
-
(
rx_fifo
->
get_index
-
rx_fifo
->
put_index
));
return
rx_length
;
}
...
...
@@ -183,14 +184,16 @@ static rt_size_t rt_dma_calc_recved_len(struct rt_serial_device *serial) {
* @param serial serial device
* @param len get data length for this operate
*/
static
void
rt_dma_recv_update_get_index
(
struct
rt_serial_device
*
serial
,
rt_size_t
len
)
{
struct
rt_serial_rx_fifo
*
rx_fifo
=
(
struct
rt_serial_rx_fifo
*
)
serial
->
serial_rx
;
static
void
rt_dma_recv_update_get_index
(
struct
rt_serial_device
*
serial
,
rt_size_t
len
)
{
struct
rt_serial_rx_fifo
*
rx_fifo
=
(
struct
rt_serial_rx_fifo
*
)
serial
->
serial_rx
;
RT_ASSERT
(
rx_fifo
!=
RT_NULL
);
RT_ASSERT
(
len
<=
rt_dma_calc_recved_len
(
serial
));
rx_fifo
->
get_index
+=
len
;
if
(
rx_fifo
->
get_index
>
serial
->
config
.
bufsz
)
{
if
(
rx_fifo
->
get_index
>
serial
->
config
.
bufsz
)
{
rx_fifo
->
get_index
-=
serial
->
config
.
bufsz
;
}
}
...
...
@@ -201,37 +204,41 @@ static void rt_dma_recv_update_get_index(struct rt_serial_device *serial, rt_siz
* @param serial serial device
* @param len received length for this transmit
*/
static
void
rt_dma_recv_update_put_index
(
struct
rt_serial_device
*
serial
,
rt_size_t
len
)
{
static
void
rt_dma_recv_update_put_index
(
struct
rt_serial_device
*
serial
,
rt_size_t
len
)
{
struct
rt_serial_rx_fifo
*
rx_fifo
=
(
struct
rt_serial_rx_fifo
*
)
serial
->
serial_rx
;
rt_size_t
i
;
RT_ASSERT
(
rx_fifo
!=
RT_NULL
);
if
(
rx_fifo
->
get_index
<=
rx_fifo
->
put_index
)
{
if
(
rx_fifo
->
get_index
<=
rx_fifo
->
put_index
)
{
rx_fifo
->
put_index
+=
len
;
/* beyond the fifo end */
if
(
rx_fifo
->
put_index
>=
serial
->
config
.
bufsz
)
{
for
(
i
=
0
;
i
<=
len
/
serial
->
config
.
bufsz
;
i
++
)
{
rx_fifo
->
put_index
-=
serial
->
config
.
bufsz
;
}
if
(
rx_fifo
->
put_index
>=
serial
->
config
.
bufsz
)
{
rx_fifo
->
put_index
%=
serial
->
config
.
bufsz
;
/* force overwrite get index */
if
(
rx_fifo
->
put_index
>=
rx_fifo
->
get_index
)
{
if
(
rx_fifo
->
put_index
>=
rx_fifo
->
get_index
)
{
rx_fifo
->
get_index
=
rx_fifo
->
put_index
+
1
;
}
}
}
else
{
}
else
{
rx_fifo
->
put_index
+=
len
;
if
(
rx_fifo
->
put_index
>=
rx_fifo
->
get_index
)
{
if
(
rx_fifo
->
put_index
>=
rx_fifo
->
get_index
)
{
/* beyond the fifo end */
if
(
rx_fifo
->
put_index
>=
serial
->
config
.
bufsz
)
{
for
(
i
=
0
;
i
<=
len
/
serial
->
config
.
bufsz
;
i
++
)
{
rx_fifo
->
put_index
-=
serial
->
config
.
bufsz
;
}
if
(
rx_fifo
->
put_index
>=
serial
->
config
.
bufsz
)
{
rx_fifo
->
put_index
%=
serial
->
config
.
bufsz
;
}
/* force overwrite get index */
rx_fifo
->
get_index
=
rx_fifo
->
put_index
+
1
;
}
}
if
(
rx_fifo
->
get_index
>=
serial
->
config
.
bufsz
)
rx_fifo
->
get_index
=
0
;
}
/*
...
...
@@ -607,17 +614,17 @@ static rt_err_t rt_serial_control(struct rt_device *dev,
if
(
args
)
{
struct
serial_configure
*
pconfig
=
(
struct
serial_configure
*
)
args
;
if
(
pconfig
->
bufsz
!=
serial
->
config
.
bufsz
&&
serial
->
parent
.
ref_count
)
if
(
pconfig
->
bufsz
!=
serial
->
config
.
bufsz
&&
serial
->
parent
.
ref_count
)
{
/*can not change buffer size*/
return
RT_EBUSY
;
}
/* set serial configure */
serial
->
config
=
*
pconfig
;
if
(
serial
->
parent
.
ref_count
)
if
(
serial
->
parent
.
ref_count
)
{
/* serial device has been opened, to configure it */
serial
->
ops
->
configure
(
serial
,
(
struct
serial_configure
*
)
args
);
serial
->
ops
->
configure
(
serial
,
(
struct
serial_configure
*
)
args
);
}
}
...
...
@@ -754,25 +761,36 @@ void rt_hw_serial_isr(struct rt_serial_device *serial, int event)
case
RT_SERIAL_EVENT_RX_DMADONE
:
{
int
length
;
rt_base_t
level
;
/* get DMA rx length */
length
=
(
event
&
(
~
0xff
))
>>
8
;
if
(
serial
->
config
.
bufsz
==
0
)
{
if
(
serial
->
config
.
bufsz
==
0
)
{
struct
rt_serial_rx_dma
*
rx_dma
;
rx_dma
=
(
struct
rt_serial_rx_dma
*
)
serial
->
serial_rx
;
rx_dma
=
(
struct
rt_serial_rx_dma
*
)
serial
->
serial_rx
;
RT_ASSERT
(
rx_dma
!=
RT_NULL
);
RT_ASSERT
(
serial
->
parent
.
rx_indicate
!=
RT_NULL
);
serial
->
parent
.
rx_indicate
(
&
(
serial
->
parent
),
length
);
rx_dma
->
activated
=
RT_FALSE
;
}
else
{
}
else
{
/* disable interrupt */
level
=
rt_hw_interrupt_disable
();
/* update fifo put index */
rt_dma_recv_update_put_index
(
serial
,
length
);
/* calculate received total length */
length
=
rt_dma_calc_recved_len
(
serial
);
/* enable interrupt */
rt_hw_interrupt_enable
(
level
);
/* invoke callback */
if
(
serial
->
parent
.
rx_indicate
!=
RT_NULL
)
{
serial
->
parent
.
rx_indicate
(
&
(
serial
->
parent
),
rt_dma_calc_recved_len
(
serial
));
if
(
serial
->
parent
.
rx_indicate
!=
RT_NULL
)
{
serial
->
parent
.
rx_indicate
(
&
(
serial
->
parent
),
length
);
}
}
break
;
...
...
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