用IDE里编程可以向串口调试助手发送数据，并在串口调试助手的接收区准确接收到所发信息-Using IDE in programming can send data to serial debugging aides and assistants in the reception area debugging serial port receive accurate information issued

基于DMA通过UART发送和接收数据的例子，注意DMA_0为接受通道，DMA_1为发送通道。当然可以将dma的read_master和writer_master同时连在uart_0和sdram_0的从端口上，这样是可以用一个dma对两者读写操作，但是不能同时做双向传输。-Based on DMA send and receive data through the UART example, attention DMA_0 accepted channels, DMA_1 to send the

AIMA Exercises Answers book