Implementing a delay using timers in STM32

Question

Simply, I want to implement a delay function using stm32 timers, like the one in AVR microcontrollers "Normal mode". Can anybody help ? I just can't find that in the stm32 datasheet! It only supports PWM, input capture, output compare and one-pulse mode output! N.B: I forgot to mention that I'm using stm32F401 microcontroller

Answer 1

You have very special timer for this purpose called SysTick. Set it to overflow every 1ms. In its handler

static volatile uint32_t counter;

void SysTick_Handler(void)
{
    counter++;
}

inline uint32_t __attribute__((always_inline)) GetCounter(void)
{
    return counter;
}

void Dealy(uint32_t ms)
{
  uint32_t tickstart = GetCounter();

  while((GetCounter() - tickstart) < ms);
}