TI M4 (Cortex M4) MCU DMA Operation

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TI M4 (Cortex M4) MCU DMA Operation [Copy link]

The following records the DMA operation of TI M4C129 MCU, using the serial port UART1 (DMA) to send and receive data with the host PC software. The MCU's serial port reception uses the DMA ping-pong mode, with two receiving Byte BufferA[128] and BufferB[128], and one sending Byte BufferSend[128]. When using the emulator breakpoint debugging Halt, the MCU's DMA is still working and has not stopped. The Receive Buffer can receive the data sent by the PC through the serial port and fill BufferA[128] -> BufferB[128] in sequence. When both receiving buffers are filled by DMA, a Uart1 interrupt will be triggered. In the Uart1 interrupt, data can be processed and the Send Buffer can be triggered to send data to the PC.