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TMS320F2808: SPI Communication Error

user4637774
Intellectual 550 points
Part Number: TMS320F2808
Other Parts Discussed in Thread: TMS320F2812

Tool/software:

TMS320F2812 and TMS320F2808 communicate with each other using SPI interface, 2812 is slave, 2808 is Main, 2808 sends data to 2812 in 500ms period. If 2812 can not receive SPI data, record SPI abnormal.If 2812 can receive data,  record SPI normal. After power-on,the board running for a period of time, began to appear SPI abnormal, normal, abnormal, normal, and then has been abnormal. repeated power-on,  SPI still abnormal.
After standing still for a period of time, after power-on,SPI is normal.

  • 0
    TI__Mastermind 23720 points

    Hello,

    I have a few questions to help me better understand the situation:

    • Can you please elaborate on the nature of the issue? Are you able to scope the 4 SPI lines? This is often the easiest way to help understand where the issue may lie. Are you seeing normal behavior on the 4 SPI lines? 
    • When you say "abnormal", what does this imply? Are you seeing specific error? Is it that you are just receiving incorrect data? Is there a similarity or pattern in when you see an "abnormal" behavior?
    • What is the context - what type of data and how much are you trying to exchange between the two devices?

    Best Regards,

    Allison