Stop core1

[Ana0211]

Hello,

Is there any function or any way to make sure that the core1 is stopped and no code is executing ? I would like to do this in order to write the PFLASH, from core0.

Thank you!

[µC_Wrangler · Accepted solution]

See Table 294 CPU Power Management in the TC3xx manual (PMCSRy.REQSLP=1).

In practice, it's a little tricky, because if you have a CPU watchdog enabled, it will likely expire if you force a CPU to idle.  Also, any interrupts for a CPU will also wake it up.  To be absolutely safe, it's best to execute from RAM.

This could also be handled with a higher level software routine, where a CPU polls a flag, and then disables interrupts and enters a very small loop (to avoid accessing PFLASH), polling the flag until it's released by the CPU doing the programming.