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TMS320F28379D: CPU2 reset from CPU1

HS FAE Germany
Mastermind 31710 points
Part Number: TMS320F28379D

Hello,
customer needs a CPU2 SW reset from CPU1 (CPU1 shouldn't be reseted). I know you can soft reset the CPUs with SysCtrlRegs.WDCR = 0x00 but I don't know if this is possible from CPU1 for CPU2.
Application is a firmware update for CPU2 executed by CPU1.

Regards, Holger

  • 0
    TI__Guru** 113855 points

    Hi Holger,

    CPU1 has reset control bit for CPU2 (CPU2RESCTL.RESET) (refer Table 3-144. CPU2RESCTL Register Field Descriptions in device TRM) which can be used to reset the CPU2.

    Regards,

    Vivek Singh

  • 0 in reply to Vivek Singh
    TI__Mastermind 31710 points

    Hello Vivek,
    thanks for this info. This is needed for firmware update of CPU2. Is there something else for CPU1? Or should CPU1 be reseted by a watchdog reset?

    In case CPU2 gets an firmware update and has to be rested by CPU1. Does the boot process of CPU2 be monitored by CPU1? How should it be done? Is there C examples or app note?

    Regards, Holger

  • 0 in reply to HS FAE Germany
    TI__Guru** 113855 points

    Hi Holger,

    HS FAE Germany said:
    Is there something else for CPU1? Or should CPU1 be reseted by a watchdog reset?

    For CPU1, watchdog is the easy option.

    HS FAE Germany said:
    In case CPU2 gets an firmware update and has to be rested by CPU1. Does the boot process of CPU2 be monitored by CPU1? How should it be done? Is there C examples or app note?

    After reset, CPU2 will boot as per the boot flow mentioned in TRM (Figure 4-3. CPU2 Device Boot Flow).  I don't think we have any app note on this specific topic.

    Regards,

    Vivek Singh

  • 0 in reply to Vivek Singh
    TI__Mastermind 31710 points

    Hello Vivek,

    in case CPU1 has reseted CPU2 through control bit CPU2RESCTL.RESET. Does CPU1 do something more? Release CPU2 reset or something else?

    Regards, Holger

  • 0 in reply to HS FAE Germany
    TI__Guru** 113855 points

    It'll just issue reset and then release the reset for CPU2.