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STELLARIS LM3S8962 eval kit , Micro Sd + OLED multiplexing

Aamir Ali
Expert 2525 points

Can I multiplex sd card with oled on eval kit using libraries provided by steallarisware & using CS pins for both

what is function of SPI0FSS in case of OLED connection. It should be chip selcet, but I noticed it goes only low after all data is send over SPI bus while sending data over SPI bus to OLED

  • 0
    TI__Genius 17225 points

    The SSI0FSS pin is controlled the SSI hardware peripheral.  It can only be used to control one SSI device slave.

    To use both the SD card and the OLED in the same software project configure both chip selects as GPIO and manually control them in the software depending on which device you want to talk to at that moment.  There is not a hardware assisted way to control the chip selects of more than one device on the same SSI peripheral.

    Dexter