ECSM's software watchdog？

[huafang]

I want to use MPC5554 chip ECSM module software watchdog, related documents?

[davidtosenovjan]

ECSM's software watchdog timer is not recommended to use on MPC5554 device.

For core watchdog you may see following appnote:

https://www.nxp.com/docs/en/application-note/AN2817.pdf

If you want only disable core watchdog, you may use following function:

asm
{
    mfhid0  r11               /* Move from spr HID0 to r11 (copies HID0) */
    li      r12, 0xBFFF       /* Load immed. data of ~0x4000 to r12 */
    oris    r12, r12, 0xFFFF
    and     r11, r12, r11     /* OR r12 (~0x00004000) with r11 (HID0 value) */
    mthid0  r11               /* Move result to HID0 */

    lis     r12, 0x00
    mtspr   tcr, r12          /* clear SPR TCR register */
}