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AM263P4-Q1: the timeout period for MCAN_setOpMode

Imaoka Daisaku
Intellectual 390 points

Part Number: AM263P4-Q1

I am trying to set an appropriate timeout period for verifying with MCAN_getOpMode() after calling MCAN_setOpMode(). How long does it usually take to switch to initialization mode or normal mode with MCAN_setOpMode()? Also, what would be the worst-case duration?
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    TI__Mastermind 33633 points

    Hi Imaoka,

    Thanks for reaching out with this excellent question. There is some synchronization that occurs during a CPU write to the MCAN registers to account for the differences in the internal operating clock and functional CAN bus clock. I was unable to find a hard defined number or value for the common or worst-case timings for switching between INIT and NORMAL operating modes. Most of the timeout example codes I have seen, use a max timeout value of 1 second. This seems like a valid option, though my recommendation would be to implement a test timer in your code to measure the actual time taken for the switch in your application. You can then determine a more accurate timeout period accounting for typical case + guardbands.

    Best Regards,

    Zackary Fleenor