Shenzhen East guide technology on DSP chips have a profound study, DSP chips, with its excellent performance in the field of high-speed computing has great application prospects. But the knowledge of its application is very heterogeneous.
    The actual communication applications, a sudden, the program must be for the next burst to prepare. Generally use the serial port DMA multi-frame mode to send or stop sending or loading data in the interrupt handler. However, the DMA mode in the serial transmission of data Shique there are some issues to be discussed. First, the DMA transfer synchronization events should be set to the McBSP transmit event XEVT, so that after a byte transfer automatically to prepare another byte (McBSP READY rising edge triggered DMA transfer). Interrupt occurs, means that a block transfer has finished, when DMA is enabled to automatically turn off the McBSP READY will always maintain a high state. But the next burst transmission directly to the DMA to Shique start can not transfer (I believe there will be many people encounter such problems). This is because they can not produce the McBSP to trigger the need to get started READY rising edge. The solution is to first shut down in the interrupt program McBSP send the READY = 0, and subsequently sent in the program to enable the DMA, and then sent to open the McBSP. Open after the first open McBSP send the DMA, but also will not work. Because the McBSP READY has changed from 0 to 1, can no longer produce READY rising edge.
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