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不用FIFO的情况下,发送数据我可以用SpibRegs.SPISTS.bit.BUFFULL_FLAG 来判断数据是否发送出去,但是接收的时候用什么判断是否有数据需要读取呢?
SPI INT FLAG bit (SPISTS.6)
spruh18i_TMS320x2806x Microcontrollers Technical Reference Manual (Rev. I) Table 12-14. SPI Serial Input Buffer (SPIRXBUF) Register Field Descriptions
SPI INT FLAG bit (SPISTS.6) 这个位发送完成也会置位,如果我发送完一个字节,马上接收一个字节,那么我怎么去区分这个位是发送置位的还是接收置位的?