中断是开的
/* Enable DMA1 Channel3 Transfer Complete interrupt */
DMA_ITConfig(DMA1_Channel3, DMA_IT_TC, ENABLE);
/* Enable SPI1 DMA Tx request */
SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE);
/* Enable SPI1 CRC calculation */
SPI_CalculateCRC(SPI1, ENABLE);
/* Enable SPI1 */
SPI_Cmd(SPI1, ENABLE);
/* Enable DMA1 channel3 */
DMA_Cmd(DMA1_Channel3, ENABLE);
中断设置
/* Configure one bit for preemption priority */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
/* Enable DMA1 channel3 IRQ Channel */
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel3_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
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楼主
