AN4776 TIM6 delay loop

AN4776_TIM6_delay_loop.c

#define ANY_DELAY_RQUIRED 0x0FFF

/* Hardware-precision delay loop implementation using TIM6 timer
peripheral. Any other STM32 timer can be used to fulfill this function, but
TIM6 timer was chosen as it has the less integration level. Other timer
peripherals may be reserved for more complicated tasks */

/* Clear the update event flag */
TIM6->SR = 0

/* Set the required delay */
/* The timer presclaer reset value is 0. If a longer delay is required the
presacler register may be configured to */
/*TIM6->PSC = 0 */
TIM6->ARR = ANY_DELAY_RQUIRED

/* Start the timer counter */
TIM6->CR1 |= TIM_CR1_CEN

/* Loop until the update event flag is set */
while (!(TIM6->SR & TIM_SR_UIF));

/* The required time delay has been elapsed */
/* User code can be executed */