diff options
Diffstat (limited to 'os/hal/platforms/STM32/gpt_lld.c')
| -rw-r--r-- | os/hal/platforms/STM32/gpt_lld.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/os/hal/platforms/STM32/gpt_lld.c b/os/hal/platforms/STM32/gpt_lld.c index 0fd5dde73..af8737f04 100644 --- a/os/hal/platforms/STM32/gpt_lld.c +++ b/os/hal/platforms/STM32/gpt_lld.c @@ -401,6 +401,10 @@ void gpt_lld_start_timer(GPTDriver *gptp, gptcnt_t interval) { gptp->tim->ARR = interval - 1; /* Time constant. */
gptp->tim->EGR = TIM_EGR_UG; /* Update event. */
+ gptp->tim->CNT = 0; /* Reset counter. */
+ /* NOTE: After generating the UG event it takes several clock cycles before
+ SR bit 0 goes to 1. This is because the clearing of CNT has been inserted
+ before the clearing of SR, to give it some time.*/
gptp->tim->SR = 0; /* Clear pending IRQs (if any). */
gptp->tim->DIER = TIM_DIER_UIE; /* Update Event IRQ enabled. */
gptp->tim->CR1 = TIM_CR1_URS | TIM_CR1_CEN;
|