How to get soft restart and hard restart

[1009427882]

Hi，

I want to distinguish between soft and hard restarts, and I plan to use a piece of RAM that is not initialized by soft restarts to mark soft restarts. Is there such an example? Or how to make a soft restart of a RAM area without initialization?

[davidtosenovjan]

Hi, could you specify used device?

[1009427882]

Hi，I use MPC5748G chip.Is there any example for reference?

[davidtosenovjan]

You can use the MC_ME module to enter the RESET mode (SW functional reset):

/* software functional reset */   

ME.MCTL.R = 0x00005AF0;

ME.MCTL.R = 0x0000A50F;

or for SW destructive reset

ME.MCTL.R = 0xF0005AF0;

ME.MCTL.R = 0xF000A50F;

After functional reset SRAM content is preserved. You need to add to the initialization code checking of RGM module statuses to distinguish whether reset cause was destructive/functional reset and based on that perform or omit SRAM initialization.