In transmission mode, once the DMA has written all the data to be transmitted (the TCIF flag is set in the
DMA_ISR register), the TC flag can be monitored to make sure that the USART communication is
complete. This is required to avoid corrupting the last transmission before disabling the USART or
entering the Stop mode. The software must wait until TC=1. The TC flag remains cleared during all data
transfers and it is set by hardware at the last frame’s end of transmission。
原来如此，明白了，谢谢大家！
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DMA_ISR register), the TC flag can be monitored to make sure that the USART communication is
complete. This is required to avoid corrupting the last transmission before disabling the USART or
entering the Stop mode. The software must wait until TC=1. The TC flag remains cleared during all data
transfers and it is set by hardware at the last frame’s end of transmission。
原来如此，明白了，谢谢大家！
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