SPORT as SPI slave | Analog Devices DSPs

Technical discussions related to Analog Devices DSPs (including Blackfin, TigerSHARC, SHARC and ADSP-21xx DSPs).

Hi, I've been trying to use a SHARC (21065 and 21262) SPORT as a SPI slave. I have observed that when I receive data, it is right shifted by a couple of bits (usually 3, but not always). If I send a "dummy byte", ie a byte in which the Sharc is not selected (selection determined by a externally generated frame sync), then the data will be received correctly. However, my new hardware platform is incapable of sending the "dummy byte". The SPORT is configured to use an external clock and external frame sync. SPI devices only send out clocks when necessary, so there is not a continuous clock, like the SPORT would prefer. I've tried changing the Late Frame Sync, data independent frame sync, frame sync required, etc. Does anyone have any ideas how to get the SPORT to perform like a SPI port? Dan

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SPORT as SPI slave - djthurin - Aug 11 16:11:00 2004