I'm trying to blink one led but two led blinks

[ahmetgunduz]

Hi,

i'm trying to blink only one led. I have a problem with one of four leds. Because as you in my code, i'm trying to blink only 'green led'. But 'blue led' blinks also.

#include "stm32f4xx.h" // Device header
#include "stm32f4xx_hal_gpio.h"
 
int main ()
{
	RCC->AHB1ENR |= (4<<1); //initiliazing clock
	GPIO_InitTypeDef GPIO_InitStructure;	
	GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP; //push-pull 
 GPIO_InitStructure.Pin = GPIO_PIN_12; //green led
	HAL_GPIO_Init(GPIOD, &GPIO_InitStructure);
	HAL_GPIO_TogglePin(GPIOD, GPIO_PIN_12); //blue led blinks also!
	return 0;
}

[Tesla DeLorean]

GPIO_InitTypeDef GPIO_InitStructure = {0};

[ahmetgunduz]

it's working now. Thanks. But I didn't understand how it is works?

[Piranha]

Maybe actually learn C language? Read this and you will understand:

https://www.tutorialspoint.com/cprogramming/c_variables.htm