diff options
Diffstat (limited to 'nuttx/arch/arm/src/stm32/stm32_serial.c')
| -rw-r--r-- | nuttx/arch/arm/src/stm32/stm32_serial.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/stm32/stm32_serial.c b/nuttx/arch/arm/src/stm32/stm32_serial.c index 01c519b39..265abfbf3 100644 --- a/nuttx/arch/arm/src/stm32/stm32_serial.c +++ b/nuttx/arch/arm/src/stm32/stm32_serial.c @@ -132,6 +132,30 @@ */ # define RXDMA_BUFFER_SIZE 32 + +/* DMA priority */ + +# ifndef CONFIG_USART_DMAPRIO +# if defined(CONFIG_STM32_STM32F10XX) +# define CONFIG_USART_DMAPRIO DMA_CCR_PRIMED +# elif defined(CONFIG_STM32_STM32F20XX) || defined(CONFIG_STM32_STM32F40XX) +# define CONFIG_USART_DMAPRIO DMA_SCR_PRIMED +# else +# error "Unknown STM32 DMA" +# endif +# endif +# if defined(CONFIG_STM32_STM32F10XX) +# if (CONFIG_USART_DMAPRIO & ~DMA_CCR_PL_MASK) != 0 +# error "Illegal value for CONFIG_USART_DMAPRIO" +# endif +# elif defined(CONFIG_STM32_STM32F20XX) || defined(CONFIG_STM32_STM32F40XX) +# if (CONFIG_USART_DMAPRIO & ~DMA_SCR_PL_MASK) != 0 +# error "Illegal value for CONFIG_USART_DMAPRIO" +# endif +# else +# error "Unknown STM32 DMA" +# endif + #endif /* Power management definitions */ @@ -975,6 +999,7 @@ static int up_dma_setup(struct uart_dev_s *dev) DMA_SCR_MINC | DMA_SCR_PSIZE_8BITS | DMA_SCR_MSIZE_8BITS | + CONFIG_USART_DMAPRIO | DMA_SCR_PBURST_SINGLE | DMA_SCR_MBURST_SINGLE); |