diff options
| -rw-r--r-- | bsp/stm32f10x/usart.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/bsp/stm32f10x/usart.c b/bsp/stm32f10x/usart.c index c4b2b757a8..17d0f4c241 100644 --- a/bsp/stm32f10x/usart.c +++ b/bsp/stm32f10x/usart.c @@ -239,8 +239,12 @@ static void DMA_Configuration(void) DMA_DeInit(UART3_TX_DMA);
DMA_InitStructure.DMA_PeripheralBaseAddr = USART3_DR_Base;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
+ /* As we will set them before DMA actually enabled, the DMA_MemoryBaseAddr
+ * and DMA_BufferSize are meaningless. So just set them to proper values
+ * which could make DMA_Init happy.
+ */
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)0;
- DMA_InitStructure.DMA_BufferSize = 0;
+ DMA_InitStructure.DMA_BufferSize = 1;
DMA_Init(UART3_TX_DMA, &DMA_InitStructure);
DMA_ITConfig(UART3_TX_DMA, DMA_IT_TC | DMA_IT_TE, ENABLE);
DMA_ClearFlag(DMA1_FLAG_TC2);
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