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采用piccolo 2803x 中的SPI例程(sprc892 DSP2803x_examples\spi_loopback)file-->load program设置断点运行时通过观测SpiaRegs.SPIRXBUF和SpiaRegs.SPITXBUF的地址,数据是在不停的刷新,为什么此时我用示波器观测对应的SPICLKA/B、SPISIMOA/B、SPISOMIA/B以及SPISTEA/B都没有信号?请问是什么原因造成的,是观测方法不对还是官方例程需要重新配置?谢谢!