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体验新版 GitCode,发现更多精彩内容 >>
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e9a6050e
编写于
1月 19, 2019
作者:
S
SummerGift
浏览文件
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电子邮件补丁
差异文件
[bsp][stm32] Fixed an error when SPI transfers data larger than 65535
上级
3b98ff13
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
32 addition
and
8 deletion
+32
-8
bsp/stm32/libraries/HAL_Drivers/drv_spi.c
bsp/stm32/libraries/HAL_Drivers/drv_spi.c
+32
-8
未找到文件。
bsp/stm32/libraries/HAL_Drivers/drv_spi.c
浏览文件 @
e9a6050e
...
...
@@ -248,6 +248,10 @@ static rt_err_t stm32_spi_init(struct stm32_spi *spi_drv, struct rt_spi_configur
static
rt_uint32_t
spixfer
(
struct
rt_spi_device
*
device
,
struct
rt_spi_message
*
message
)
{
HAL_StatusTypeDef
state
;
rt_size_t
message_length
,
already_send_length
;
rt_uint16_t
send_length
;
rt_uint8_t
*
recv_buf
;
const
rt_uint8_t
*
send_buf
;
RT_ASSERT
(
device
!=
RT_NULL
);
RT_ASSERT
(
device
->
bus
!=
RT_NULL
);
...
...
@@ -269,41 +273,61 @@ static rt_uint32_t spixfer(struct rt_spi_device *device, struct rt_spi_message *
(
uint32_t
)
message
->
send_buf
,
(
uint32_t
)
message
->
recv_buf
,
message
->
length
);
if
(
message
->
length
)
message_length
=
message
->
length
;
recv_buf
=
message
->
recv_buf
;
send_buf
=
message
->
send_buf
;
while
(
message_length
)
{
/* the HAL library use uint16 to save the data length */
if
(
message_length
>
65535
)
{
send_length
=
65535
;
message_length
=
message_length
-
65535
;
}
else
{
send_length
=
message_length
;
message_length
=
0
;
}
/* calculate the start address */
already_send_length
=
message
->
length
-
send_length
-
message_length
;
send_buf
=
(
rt_uint8_t
*
)
message
->
send_buf
+
already_send_length
;
recv_buf
=
(
rt_uint8_t
*
)
message
->
recv_buf
+
already_send_length
;
/* start once data exchange in DMA mode */
if
(
message
->
send_buf
&&
message
->
recv_buf
)
{
if
((
spi_drv
->
spi_dma_flag
&
SPI_USING_TX_DMA_FLAG
)
&&
(
spi_drv
->
spi_dma_flag
&
SPI_USING_RX_DMA_FLAG
))
{
state
=
HAL_SPI_TransmitReceive_DMA
(
spi_handle
,
(
uint8_t
*
)
message
->
send_buf
,
(
uint8_t
*
)
message
->
recv_buf
,
message
->
length
);
state
=
HAL_SPI_TransmitReceive_DMA
(
spi_handle
,
(
uint8_t
*
)
send_buf
,
(
uint8_t
*
)
recv_buf
,
send_
length
);
}
else
{
state
=
HAL_SPI_TransmitReceive
(
spi_handle
,
(
uint8_t
*
)
message
->
send_buf
,
(
uint8_t
*
)
message
->
recv_buf
,
message
->
length
,
1000
);
state
=
HAL_SPI_TransmitReceive
(
spi_handle
,
(
uint8_t
*
)
send_buf
,
(
uint8_t
*
)
recv_buf
,
send_
length
,
1000
);
}
}
else
if
(
message
->
send_buf
)
{
if
(
spi_drv
->
spi_dma_flag
&
SPI_USING_TX_DMA_FLAG
)
{
state
=
HAL_SPI_Transmit_DMA
(
spi_handle
,
(
uint8_t
*
)
message
->
send_buf
,
message
->
length
);
state
=
HAL_SPI_Transmit_DMA
(
spi_handle
,
(
uint8_t
*
)
send_buf
,
send_
length
);
}
else
{
state
=
HAL_SPI_Transmit
(
spi_handle
,
(
uint8_t
*
)
message
->
send_buf
,
message
->
length
,
1000
);
state
=
HAL_SPI_Transmit
(
spi_handle
,
(
uint8_t
*
)
send_buf
,
send_
length
,
1000
);
}
}
else
{
memset
(
message
->
recv_buf
,
0xff
,
message
->
length
);
memset
(
(
uint8_t
*
)
recv_buf
,
0xff
,
send_
length
);
if
(
spi_drv
->
spi_dma_flag
&
SPI_USING_RX_DMA_FLAG
)
{
state
=
HAL_SPI_Receive_DMA
(
spi_handle
,
(
uint8_t
*
)
message
->
recv_buf
,
message
->
length
);
state
=
HAL_SPI_Receive_DMA
(
spi_handle
,
(
uint8_t
*
)
recv_buf
,
send_
length
);
}
else
{
state
=
HAL_SPI_Receive
(
spi_handle
,
(
uint8_t
*
)
message
->
recv_buf
,
message
->
length
,
1000
);
state
=
HAL_SPI_Receive
(
spi_handle
,
(
uint8_t
*
)
recv_buf
,
send_
length
,
1000
);
}
}
...
...
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