Why Reset_Handler() generated by CubeMX2 set PSP not MSP
Hi, I find the startup file generated by CubeMX2 for my STM32C551xx MCU doing something weird that I couldn’t understand.
/**
* @brief This function is the Reset Handler called on controller reset.
* @param None
* @retval None
*/
__WEAK __NO_RETURN void Reset_Handler(void)
{
__set_PSP((uint32_t)(&__INITIAL_SP));
__set_MSPLIM((uint32_t)(&__STACK_LIMIT));
__set_PSPLIM((uint32_t)(&__STACK_LIMIT));
SystemInit(); /* CMSIS System Initialization */
__PROGRAM_START(); /* Enter PreMain (C library entry point) */
}
The code shown above reset the PSP pointer rather than MSP. I’m not sure if I do some misunderstanding about the stack pointer, as PM0264 indicated that MSP should be the one reset to the value retrieved by the reset handler.
