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Update drv_usart.c 

修复dma_config里面rcc的bug。
This commit is contained in:
周传福 2019-05-22 09:48:13 +08:00 committed by GitHub
parent 56e83fe735
commit 1e10891f37
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1 changed files with 4 additions and 4 deletions
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8
bsp/stm32/libraries/HAL_Drivers/drv_usart.c
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@ -660,12 +660,12 @@ static void stm32_dma_config(struct rt_serial_device *serial, rt_ubase_t flag)
#if defined(SOC_SERIES_STM32F1) || defined(SOC_SERIES_STM32F0) || defined(SOC_SERIES_STM32G0) \
|| defined(SOC_SERIES_STM32L0)
/* enable DMA clock && Delay after an RCC peripheral clock enabling*/
SET_BIT(RCC->AHBENR, uart->config->dma_rx->dma_rcc);
tmpreg = READ_BIT(RCC->AHBENR, uart->config->dma_rx->dma_rcc);
SET_BIT(RCC->AHBENR, dma_config->dma_rcc);
tmpreg = READ_BIT(RCC->AHBENR, dma_config->dma_rcc);
#elif defined(SOC_SERIES_STM32F4) || defined(SOC_SERIES_STM32F7) || defined(SOC_SERIES_STM32L4)
/* enable DMA clock && Delay after an RCC peripheral clock enabling*/
SET_BIT(RCC->AHB1ENR, uart->config->dma_rx->dma_rcc);
tmpreg = READ_BIT(RCC->AHB1ENR, uart->config->dma_rx->dma_rcc);
SET_BIT(RCC->AHB1ENR, dma_config->dma_rcc);
tmpreg = READ_BIT(RCC->AHB1ENR, dma_config->dma_rcc);
#endif
UNUSED(tmpreg); /* To avoid compiler warnings */
}