STM32G070 software reset issue

[aravindpv]

I was doing reset through SPI command and expected results are not happening.

this is the line i was expecting to reset the MCU

SCB->AIRCR = (NVIC_AIRCR_VECTKEY | (SCB->AIRCR & (0x700)) | (1 << NVIC_SYSRESETREQ));

where

#define NVIC_AIRCR_VECTKEY (0x05FA << 16)

#define NVIC_SYSRESETREQ    2

also my watchdog is running and expected to reset the system.
code snippet

FLASH_Unlock();
FLASH_ErasePage(0x08013000);
FLASH_ProgramWord(0x08013000, (uint64_t)0x0000000000000000ULL);
FLASH_Lock();

FLASH_Unlock();
FLASH_ErasePage(0x08013008);
FLASH_Lock();

SCB->AIRCR = (NVIC_AIRCR_VECTKEY | (SCB->AIRCR & (0x700)) | (1 << NVIC_SYSRESETREQ));
__DSB();

while (1);

---

Edited to apply proper source code formatting - please see How to insert source code for future reference.

[aravindpv]

Hi i have tried toggle a gpio  as you mentioned and it didnt reset. As I mentioned some hung state or something which i couldnt trace. And i will let you know about the NRST pin since i am lacking the setup as of now

[aravindpv]

@TDK @mƎALLEm @Andrew Neil 
Hi I found that, it's not issue with reset it's purely related to the flash operations I am doing. Once I commented those operations I am able to proper reset.
these are the operations I am perform 

FLASH_Unlock();
FLASH_ErasePage(0x08013000); // newly added

FLASH_ProgramWord(0x08013000, (uint64_t)0x0000000000000000ULL);

FLASH_Lock();
FLASH_Unlock();
FLASH_ErasePage(0x08013800);
FLASH_Lock();

were the related functions are

void FLASH_Unlock(void)
{
  /* (1) Wait till no operation is on going */
  /* (2) Check that the Flash is unlocked */
  /* (3) Perform unlock sequence */
	/* (4) Set EOPIE otherwise EOP bit will never be set */
  Flash_WaitIfBusy();

  if ((FLASH->CR & FLASH_CR_LOCK) != 0) /* (2) */
    {
      FLASH->KEYR = FLASH_KEY1; /* (3) */
      FLASH->KEYR = FLASH_KEY2;
    }

	FLASH->CR |= FLASH_CR_EOPIE; /* (4) */
  FLASH->SR = FLASH_SR_PGSERR|FLASH_SR_SIZERR|FLASH_SR_PGAERR|FLASH_SR_WRPERR|FLASH_SR_PROGERR|FLASH_SR_EOP|FLASH_SR_OPERR; // Clean all registers
}

void FLASH_ErasePage(uint32_t Page_Address)
{

	Page_Address = Page_Address & 0xFFFF;
	Page_Address = Page_Address/C_PAGE_SIZE; /* (0) */
  Flash_WaitIfBusy();

  /* If the previous operation is completed, proceed to erase the page */
  FLASH->CR |= FLASH_CR_PER; /* (1) */
  FLASH->CR &= ~(FLASH_CR_PNB); /* (2) */
  FLASH->CR |= (Page_Address << FLASH_CR_PNB_Pos); /* (2) */
  FLASH->CR |= FLASH_CR_STRT; /* (3) */

  __NOP();
  __NOP();


  Flash_WaitIfBusy(); /* (4) */

  FLASH->CR &= ~FLASH_CR_PER; /* (5)*/

}
void FLASH_ProgramWord(uint32_t Address, uint64_t Data)
{
  __IO uint32_t tmp = 0;

  Flash_WaitIfBusy();

  /* If the previous operation is completed, proceed to program the new first
     half word */
  FLASH->CR |= FLASH_CR_PG;

  *(__IO uint32_t*)Address = (uint32_t)Data;


  /* If the previous operation is completed, proceed to program the new second
     half word */
  tmp = Address + 4;

  *(__IO uint32_t*) tmp = (uint32_t)(Data >> 32);

  /* Wait for last operation to be completed */
  Flash_WaitIfBusy();

  if ((FLASH->SR & FLASH_SR_EOP) != 0)
  {
		FLASH->SR = FLASH_SR_EOP;
  }
  else
  {
    // If for some reason EOP is not set, error occured while writing
    dbglog(0xFE);
    error_type = ERR_FLASH_PRG_EOP;
  }

  /* Disable the PG Bit */
  FLASH->CR &= ~FLASH_CR_PG;
}

void FLASH_Lock(void)
{
  FLASH->CR |= FLASH_CR_LOCK;
}
void Flash_WaitIfBusy(void)
{
  /* (1) Wait till no operation is on going */
    while ((FLASH->SR & FLASH_SR_BSY1) != 0) /* (1) */
    {
      __NOP();
    }
}

Please Help me with this scenario

[TDK]

This looks like AI generated code with the comments. Maybe stick to the working HAL implementations to modify flash.