Hi,
Greetings,
I would like to freeze the IWDG in stop 2 mode.
Code is available here:
// Read bit and regitster
LOG_Print("Flash->OPTR Value(Before):%#x\n",READ_BIT(FLASH->OPTR, FLASH_OPTR_IWDG_STOP));
value = READ_REG(FLASH->OPTR);
LOG_Print("Read value of reg is:%#x",value);
osDelay(5000);
//claer the FLASH_OPTR_IWDG_STOP bit to freez the IWDG Counter:
value &= ~(FLASH_OPTR_IWDG_STOP);
LOG_Print("Updated value of reg is:%#x",value);
FLASH_If_WriteProtectionClear();
osDelay(5000);
WRITE_REG(FLASH->OPTR,value);
osDelay(5000);
// Rechecking the written value & Bit
LOG_Print("Flash->OPTR Value(After):%#x\n",READ_BIT(FLASH->OPTR, FLASH_OPTR_IWDG_STOP));
value = READ_REG(FLASH->OPTR);
LOG_Print("Read value of reg is:%#x",value);
osDelay(5000);
HAL_PWREx_EnterSTOP2Mode(PWR_STOPENTRY_WFI);
Below is the Output:
Flash->OPTR Value(Before):0x20000
Read value of reg is:0xffeff8aa
Updated value of reg is:0xffedf8aa
Flash->OPTR Value(After):0
Read value of reg is:0xffedf8aa
As per the manual, if the bit is zero counter does freeze, but I see my MCU is restarring as the counter watchdog counter goes off.
