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7d17f50a
编写于
5月 14, 2016
作者:
armink_ztl
浏览文件
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电子邮件补丁
差异文件
[BSP] Add usart DMA Rx driver to stm32f10x.
上级
c3da9dda
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
226 addition
and
90 deletion
+226
-90
bsp/stm32f10x/drivers/usart.c
bsp/stm32f10x/drivers/usart.c
+226
-90
未找到文件。
bsp/stm32f10x/drivers/usart.c
浏览文件 @
7d17f50a
...
...
@@ -13,6 +13,7 @@
* 2010-03-29 Bernard remove interrupt Tx and DMA Rx mode
* 2013-05-13 aozima update for kehong-lingtai.
* 2015-01-31 armink make sure the serial transmit complete in putc()
* 2016-05-13 armink add DMA Rx mode
*/
#include "stm32f10x.h"
...
...
@@ -44,10 +45,22 @@
/* STM32 uart driver */
struct
stm32_uart
{
USART_TypeDef
*
uart_device
;
USART_TypeDef
*
uart_device
;
IRQn_Type
irq
;
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
;
/* last receive index */
rt_size_t
last_recv_len
;
}
dma
;
};
static
void
DMA_Configuration
(
struct
rt_serial_device
*
serial
);
static
rt_err_t
stm32_configure
(
struct
rt_serial_device
*
serial
,
struct
serial_configure
*
cfg
)
{
struct
stm32_uart
*
uart
;
...
...
@@ -93,6 +106,7 @@ static rt_err_t stm32_configure(struct rt_serial_device *serial, struct serial_c
static
rt_err_t
stm32_control
(
struct
rt_serial_device
*
serial
,
int
cmd
,
void
*
arg
)
{
struct
stm32_uart
*
uart
;
rt_uint32_t
ctrl_arg
=
(
rt_uint32_t
)(
arg
);
RT_ASSERT
(
serial
!=
RT_NULL
);
uart
=
(
struct
stm32_uart
*
)
serial
->
parent
.
user_data
;
...
...
@@ -113,8 +127,13 @@ static rt_err_t stm32_control(struct rt_serial_device *serial, int cmd, void *ar
/* enable interrupt */
USART_ITConfig
(
uart
->
uart_device
,
USART_IT_RXNE
,
ENABLE
);
break
;
/* USART config */
case
RT_DEVICE_CTRL_CONFIG
:
if
(
ctrl_arg
==
RT_DEVICE_FLAG_DMA_RX
)
{
DMA_Configuration
(
serial
);
}
break
;
}
return
RT_EOK
;
}
...
...
@@ -148,6 +167,91 @@ static int stm32_getc(struct rt_serial_device *serial)
return
ch
;
}
/**
* Serial port receive idle process. This need add to uart idle ISR.
*
* @param serial serial device
*/
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
;
}
uart
->
dma
.
last_recv_len
=
recv_total_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
);
}
/**
* DMA receive done process. This need add to DMA receive done ISR.
*
* @param serial serial device
*/
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
;
}
uart
->
dma
.
last_recv_len
=
recv_total_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
);
}
/**
* Uart common interrupt process. This need add to uart ISR.
*
* @param serial serial device
*/
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
);
if
(
USART_GetITStatus
(
uart
->
uart_device
,
USART_IT_RXNE
)
!=
RESET
)
{
rt_hw_serial_isr
(
serial
,
RT_SERIAL_EVENT_RX_IND
);
/* clear interrupt */
USART_ClearITPendingBit
(
uart
->
uart_device
,
USART_IT_RXNE
);
}
if
(
USART_GetITStatus
(
uart
->
uart_device
,
USART_IT_IDLE
)
!=
RESET
)
{
dma_uart_rx_idle_isr
(
serial
);
}
if
(
USART_GetITStatus
(
uart
->
uart_device
,
USART_IT_TC
)
!=
RESET
)
{
/* clear interrupt */
USART_ClearITPendingBit
(
uart
->
uart_device
,
USART_IT_TC
);
}
if
(
USART_GetFlagStatus
(
uart
->
uart_device
,
USART_FLAG_ORE
)
==
SET
)
{
stm32_getc
(
serial
);
}
}
static
const
struct
rt_uart_ops
stm32_uart_ops
=
{
stm32_configure
,
...
...
@@ -162,70 +266,68 @@ struct stm32_uart uart1 =
{
USART1
,
USART1_IRQn
,
{
DMA1_Channel5
,
DMA1_FLAG_GL5
,
DMA1_Channel5_IRQn
,
0
,
},
};
struct
rt_serial_device
serial1
;
void
USART1_IRQHandler
(
void
)
{
struct
stm32_uart
*
uart
;
/* enter interrupt */
rt_interrupt_enter
();
uart
=
&
uart1
;
uart_isr
(
&
serial1
);
/* leave interrupt */
rt_interrupt_leave
();
}
void
DMA1_Channel5_IRQHandler
(
void
)
{
/* enter interrupt */
rt_interrupt_enter
();
if
(
USART_GetITStatus
(
uart
->
uart_device
,
USART_IT_RXNE
)
!=
RESET
)
{
rt_hw_serial_isr
(
&
serial1
,
RT_SERIAL_EVENT_RX_IND
);
/* clear interrupt */
USART_ClearITPendingBit
(
uart
->
uart_device
,
USART_IT_RXNE
);
}
if
(
USART_GetITStatus
(
uart
->
uart_device
,
USART_IT_TC
)
!=
RESET
)
{
/* clear interrupt */
USART_ClearITPendingBit
(
uart
->
uart_device
,
USART_IT_TC
);
}
if
(
USART_GetFlagStatus
(
uart
->
uart_device
,
USART_FLAG_ORE
)
==
SET
)
{
stm32_getc
(
&
serial1
);
}
dma_rx_done_isr
(
&
serial1
);
/* leave interrupt */
rt_interrupt_leave
();
}
#endif
/* RT_USING_UART1 */
#if defined(RT_USING_UART2)
/* UART
1
device driver structure */
/* UART
2
device driver structure */
struct
stm32_uart
uart2
=
{
USART2
,
USART2_IRQn
,
{
DMA1_Channel6
,
DMA1_FLAG_GL6
,
DMA1_Channel6_IRQn
,
0
,
},
};
struct
rt_serial_device
serial2
;
void
USART2_IRQHandler
(
void
)
{
struct
stm32_uart
*
uart
;
/* enter interrupt */
rt_interrupt_enter
();
uart
=
&
uart2
;
uart
_isr
(
&
serial2
)
;
/* leave interrupt */
rt_interrupt_leave
();
}
void
DMA1_Channel6_IRQHandler
(
void
)
{
/* enter interrupt */
rt_interrupt_enter
();
if
(
USART_GetITStatus
(
uart
->
uart_device
,
USART_IT_RXNE
)
!=
RESET
)
{
rt_hw_serial_isr
(
&
serial2
,
RT_SERIAL_EVENT_RX_IND
);
/* clear interrupt */
USART_ClearITPendingBit
(
uart
->
uart_device
,
USART_IT_RXNE
);
}
if
(
USART_GetITStatus
(
uart
->
uart_device
,
USART_IT_TC
)
!=
RESET
)
{
/* clear interrupt */
USART_ClearITPendingBit
(
uart
->
uart_device
,
USART_IT_TC
);
}
if
(
USART_GetFlagStatus
(
uart
->
uart_device
,
USART_FLAG_ORE
)
==
SET
)
{
stm32_getc
(
&
serial2
);
}
dma_rx_done_isr
(
&
serial2
);
/* leave interrupt */
rt_interrupt_leave
();
...
...
@@ -238,32 +340,31 @@ struct stm32_uart uart3 =
{
USART3
,
USART3_IRQn
,
{
DMA1_Channel3
,
DMA1_FLAG_GL3
,
DMA1_Channel3_IRQn
,
0
,
},
};
struct
rt_serial_device
serial3
;
void
USART3_IRQHandler
(
void
)
{
struct
stm32_uart
*
uart
;
/* enter interrupt */
rt_interrupt_enter
();
uart
=
&
uart3
;
uart
_isr
(
&
serial3
)
;
/* leave interrupt */
rt_interrupt_leave
();
}
void
DMA1_Channel3_IRQHandler
(
void
)
{
/* enter interrupt */
rt_interrupt_enter
();
if
(
USART_GetITStatus
(
uart
->
uart_device
,
USART_IT_RXNE
)
!=
RESET
)
{
rt_hw_serial_isr
(
&
serial3
,
RT_SERIAL_EVENT_RX_IND
);
/* clear interrupt */
USART_ClearITPendingBit
(
uart
->
uart_device
,
USART_IT_RXNE
);
}
if
(
USART_GetITStatus
(
uart
->
uart_device
,
USART_IT_TC
)
!=
RESET
)
{
/* clear interrupt */
USART_ClearITPendingBit
(
uart
->
uart_device
,
USART_IT_TC
);
}
if
(
USART_GetFlagStatus
(
uart
->
uart_device
,
USART_FLAG_ORE
)
==
SET
)
{
stm32_getc
(
&
serial3
);
}
dma_rx_done_isr
(
&
serial3
);
/* leave interrupt */
rt_interrupt_leave
();
...
...
@@ -276,69 +377,66 @@ struct stm32_uart uart4 =
{
UART4
,
UART4_IRQn
,
{
DMA2_Channel3
,
DMA2_FLAG_GL3
,
DMA2_Channel3_IRQn
,
0
,
},
};
struct
rt_serial_device
serial4
;
void
UART4_IRQHandler
(
void
)
{
struct
stm32_uart
*
uart
;
/* enter interrupt */
rt_interrupt_enter
();
uart
=
&
uart4
;
uart
_isr
(
&
serial4
)
;
/* leave interrupt */
rt_interrupt_leave
();
}
void
DMA2_Channel3_IRQHandler
(
void
)
{
/* enter interrupt */
rt_interrupt_enter
();
if
(
USART_GetITStatus
(
uart
->
uart_device
,
USART_IT_RXNE
)
!=
RESET
)
{
rt_hw_serial_isr
(
&
serial4
,
RT_SERIAL_EVENT_RX_IND
);
/* clear interrupt */
USART_ClearITPendingBit
(
uart
->
uart_device
,
USART_IT_RXNE
);
}
if
(
USART_GetITStatus
(
uart
->
uart_device
,
USART_IT_TC
)
!=
RESET
)
{
/* clear interrupt */
USART_ClearITPendingBit
(
uart
->
uart_device
,
USART_IT_TC
);
}
if
(
USART_GetFlagStatus
(
uart
->
uart_device
,
USART_FLAG_ORE
)
==
SET
)
{
stm32_getc
(
&
serial4
);
}
dma_rx_done_isr
(
&
serial4
);
/* leave interrupt */
rt_interrupt_leave
();
}
#endif
/* RT_USING_UART3 */
#endif
/* RT_USING_UART4 */
static
void
RCC_Configuration
(
void
)
{
#if defined(RT_USING_UART1)
/* Enable UART GPIO clocks */
RCC_APB2PeriphClockCmd
(
RCC_APB2Periph_GPIOA
,
ENABLE
);
RCC_APB2PeriphClockCmd
(
RCC_APB2Periph_GPIOA
|
RCC_APB2Periph_AFIO
,
ENABLE
);
/* Enable UART clock */
RCC_APB2PeriphClockCmd
(
RCC_APB2Periph_USART1
,
ENABLE
);
#endif
/* RT_USING_UART1 */
#if defined(RT_USING_UART2)
/* Enable UART GPIO clocks */
RCC_APB2PeriphClockCmd
(
RCC_APB2Periph_GPIOA
,
ENABLE
);
RCC_APB2PeriphClockCmd
(
RCC_APB2Periph_GPIOA
|
RCC_APB2Periph_AFIO
,
ENABLE
);
/* Enable UART clock */
RCC_APB1PeriphClockCmd
(
RCC_APB1Periph_USART2
,
ENABLE
);
#endif
/* RT_USING_UART2 */
#if defined(RT_USING_UART3)
/* Enable UART GPIO clocks */
RCC_APB2PeriphClockCmd
(
RCC_APB2Periph_GPIOB
,
ENABLE
);
RCC_APB2PeriphClockCmd
(
RCC_APB2Periph_GPIOB
|
RCC_APB2Periph_AFIO
,
ENABLE
);
/* Enable UART clock */
RCC_APB1PeriphClockCmd
(
RCC_APB1Periph_USART3
,
ENABLE
);
#endif
/* RT_USING_UART3 */
#if defined(RT_USING_UART4)
/* Enable UART GPIO clocks */
RCC_APB2PeriphClockCmd
(
RCC_APB2Periph_GPIOC
,
ENABLE
);
RCC_APB2PeriphClockCmd
(
RCC_APB2Periph_GPIOC
|
RCC_APB2Periph_AFIO
,
ENABLE
);
/* Enable UART clock */
RCC_APB1PeriphClockCmd
(
RCC_APB1Periph_UART4
,
ENABLE
);
#endif
/* RT_USING_UART4 */
}
static
void
GPIO_Configuration
(
void
)
...
...
@@ -390,7 +488,6 @@ static void GPIO_Configuration(void)
GPIO_InitStructure
.
GPIO_Pin
=
UART4_GPIO_TX
;
GPIO_Init
(
UART4_GPIO
,
&
GPIO_InitStructure
);
#endif
/* RT_USING_UART4 */
}
static
void
NVIC_Configuration
(
struct
stm32_uart
*
uart
)
...
...
@@ -405,6 +502,46 @@ static void NVIC_Configuration(struct stm32_uart* uart)
NVIC_Init
(
&
NVIC_InitStructure
);
}
static
void
DMA_Configuration
(
struct
rt_serial_device
*
serial
)
{
struct
stm32_uart
*
uart
=
(
struct
stm32_uart
*
)
serial
->
parent
.
user_data
;
struct
rt_serial_rx_fifo
*
rx_fifo
=
(
struct
rt_serial_rx_fifo
*
)
serial
->
serial_rx
;
DMA_InitTypeDef
DMA_InitStructure
;
NVIC_InitTypeDef
NVIC_InitStructure
;
/* enable transmit idle interrupt */
USART_ITConfig
(
uart
->
uart_device
,
USART_IT_IDLE
,
ENABLE
);
/* DMA clock enable */
RCC_AHBPeriphClockCmd
(
RCC_AHBPeriph_DMA1
,
ENABLE
);
RCC_AHBPeriphClockCmd
(
RCC_AHBPeriph_DMA2
,
ENABLE
);
/* rx dma config */
DMA_DeInit
(
uart
->
dma
.
rx_ch
);
DMA_InitStructure
.
DMA_PeripheralBaseAddr
=
(
uint32_t
)
&
(
uart
->
uart_device
->
DR
);
DMA_InitStructure
.
DMA_MemoryBaseAddr
=
(
uint32_t
)
rx_fifo
->
buffer
;
DMA_InitStructure
.
DMA_DIR
=
DMA_DIR_PeripheralSRC
;
DMA_InitStructure
.
DMA_BufferSize
=
serial
->
config
.
bufsz
;
DMA_InitStructure
.
DMA_PeripheralInc
=
DMA_PeripheralInc_Disable
;
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_Priority
=
DMA_Priority_High
;
DMA_InitStructure
.
DMA_M2M
=
DMA_M2M_Disable
;
DMA_Init
(
uart
->
dma
.
rx_ch
,
&
DMA_InitStructure
);
DMA_ClearFlag
(
uart
->
dma
.
rx_gl_flag
);
DMA_ITConfig
(
uart
->
dma
.
rx_ch
,
DMA_IT_TC
,
ENABLE
);
USART_DMACmd
(
uart
->
uart_device
,
USART_DMAReq_Rx
,
ENABLE
);
DMA_Cmd
(
uart
->
dma
.
rx_ch
,
ENABLE
);
/* 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_IRQChannelCmd
=
ENABLE
;
NVIC_Init
(
&
NVIC_InitStructure
);
}
void
rt_hw_usart_init
(
void
)
{
struct
stm32_uart
*
uart
;
...
...
@@ -420,11 +557,11 @@ void rt_hw_usart_init(void)
serial1
.
ops
=
&
stm32_uart_ops
;
serial1
.
config
=
config
;
NVIC_Configuration
(
&
uart1
);
NVIC_Configuration
(
uart
);
/* register UART1 device */
rt_hw_serial_register
(
&
serial1
,
"uart1"
,
RT_DEVICE_FLAG_RDWR
|
RT_DEVICE_FLAG_INT_RX
,
RT_DEVICE_FLAG_RDWR
|
RT_DEVICE_FLAG_INT_RX
|
RT_DEVICE_FLAG_DMA_RX
,
uart
);
#endif
/* RT_USING_UART1 */
...
...
@@ -435,11 +572,11 @@ void rt_hw_usart_init(void)
serial2
.
ops
=
&
stm32_uart_ops
;
serial2
.
config
=
config
;
NVIC_Configuration
(
&
uart2
);
NVIC_Configuration
(
uart
);
/* register UART
1
device */
/* register UART
2
device */
rt_hw_serial_register
(
&
serial2
,
"uart2"
,
RT_DEVICE_FLAG_RDWR
|
RT_DEVICE_FLAG_INT_RX
,
RT_DEVICE_FLAG_RDWR
|
RT_DEVICE_FLAG_INT_RX
|
RT_DEVICE_FLAG_DMA_RX
,
uart
);
#endif
/* RT_USING_UART2 */
...
...
@@ -451,11 +588,11 @@ void rt_hw_usart_init(void)
serial3
.
ops
=
&
stm32_uart_ops
;
serial3
.
config
=
config
;
NVIC_Configuration
(
&
uart3
);
NVIC_Configuration
(
uart
);
/* register UART
1
device */
/* register UART
3
device */
rt_hw_serial_register
(
&
serial3
,
"uart3"
,
RT_DEVICE_FLAG_RDWR
|
RT_DEVICE_FLAG_INT_RX
,
RT_DEVICE_FLAG_RDWR
|
RT_DEVICE_FLAG_INT_RX
|
RT_DEVICE_FLAG_DMA_RX
,
uart
);
#endif
/* RT_USING_UART3 */
...
...
@@ -467,12 +604,11 @@ void rt_hw_usart_init(void)
serial4
.
ops
=
&
stm32_uart_ops
;
serial4
.
config
=
config
;
NVIC_Configuration
(
&
uart4
);
NVIC_Configuration
(
uart
);
/* register UART4 device */
rt_hw_serial_register
(
&
serial4
,
"uart4"
,
RT_DEVICE_FLAG_RDWR
|
RT_DEVICE_FLAG_INT_RX
,
RT_DEVICE_FLAG_RDWR
|
RT_DEVICE_FLAG_INT_RX
|
RT_DEVICE_FLAG_DMA_RX
,
uart
);
#endif
/* RT_USING_UART4 */
}
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