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TMS570LC4357: 如何实现SCI的DMA不定长度发送

Part Number: TMS570LC4357


在第一次DMA发送时,设置如下:

g_dmaCTRLPKT_SCI1_TX.FRCNT = 4;
g_dmaCTRLPKT_SCI1_TX.ELCNT = 1; /* element destination offset */

在下一次DMA发送时,想发送数据长度为8;那么该如何操作。