uVision Led lights - stm32

Question

This is the first time i am programming a mikrokontroler, i'm using uVison and have an stm32 to program on.,
I have two LED light on it on the pins: PIN_4 and PIN_5 with a tutorial i know how to make one blink (the code below) but i dont know how to make them bot blink with not the same delay. Like i want to make PIN_4 led be wit a delay of 100ms and PIN:5 led with a delay of 50ms. The code below is the code for one Led light.
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_4); //Toggle the state of pin PC9
HAL_Delay(100); //delay 100ms
}
/* USER CODE END 3 */
}

Answer 1

You have 2 options.
First, you can set a timer for counting milliseconds. You can generate a code from STMCubeMX for 50ms timer. Then, in timer callback function, you should set pins to high or low.
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
timer_counter++; //50ms
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_5);
if(timer_counter>=2) //100ms
{
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_4);
timer_counter = 0;
}
}
Second option is that delay in main.
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_5); //Toggle the state of pin PB5
HAL_Delay(50); //delay 50ms
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_4); //Toggle the state of pin PB4
HAL_GPIO_TogglePin(GPIOB, GPIO_PIN_5); //Toggle the state of pin PB5
HAL_Delay(50); // delay 50ms
}
/* USER CODE END 3 */
}