Posted on October 13, 2016 at 12:24Hi everybody
I have read something about GPIOx_LCKR register in RM0008 page 173-174.
Those pages are about pin lock configuration in STM32f0xx.
As you know when we lock a pin, it's state should not be changed by configuring as high or low in pushpull. but my codes can't achieve that goal. Can you tell me what the problem is?
int main(void)
{
HAL_GPIO_LockPin(GPIOD,GPIO_PIN_7);
while (1)
{
HAL_GPIO_TogglePin(GPIOD,GPIO_PIN_7);
HAL_Delay(200);
}
}
/////////////////////////////////////////////////////
int main()
{
uint32_t tmp = 0x00010000;
tmp |= 0x00000080;
// Set LCKK bit
GPIOD->LCKR = tmp;
// Reset LCKK bit
GPIOD->LCKR = 0x00000080;
// Set LCKK bit
GPIOD->LCKR = tmp;
// Read LCKK bit
tmp = GPIOD->LCKR;
// Read LCKK bit
tmp = GPIOD->LCKR;
while(1)
{
GPIOD->BSRR &= ~0x00000080;
GPIOD->BSRR |= 0x00000080;
delay(1000000);
GPIOD->BSRR &= ~0x00800000;
GPIOD->BSRR |= 0x00800000;
delay(1000000);
}
}
//////////////////////////////////////////////////
at above codes LED PD.7 keeps blinking.
