Code examples RM0367
1008/1043 RM0367 Rev 7
+ ((((uint32_t)(&TIM2->CCR2)) - ((uint32_t)(&TIM2->CR1))) >> 2)
; /* (7) */
TIMx->DIER |= TIM_DIER_UDE; /* (8) */
TIMx->CR1 |= TIM_CR1_CEN; /* (9) */
DMA1_Channel2->CCR |= DMA_CCR_EN; /* (10) */
A.12 Low-power timer (LPTIM)
A.12.1 Pulse counter configuration code example
/* (1) Configure LPTimer in Counter on External Input1.*/
/* (2) Enable interrupt on Autoreload match */
/* (3) Enable LPTimer */
/* (4) Set Autoreload to 4 in order to get an interrupt after 10 pulses
because the 5 first pulses don't increment the counter */
LPTIM1->CFGR |= LPTIM_CFGR_COUNTMODE | LPTIM_CFGR_CKSEL; /* (1 */
LPTIM1->IER |= LPTIM_IER_ARRMIE; /* (2) */
LPTIM1->CR |= LPTIM_CR_ENABLE; /* (3) */
LPTIM1->ARR = 4; /* (4) */
LPTIM1->CR |= LPTIM_CR_CNTSTRT; /* start the counter in continuous */
A.13 IWDG code example
A.13.1 IWDG configuration code example
/* (1) Activate IWDG (not needed if done in option bytes) */
/* (2) Enable write access to IWDG registers */
/* (3) Set prescaler by 8 */
/* (4) Set reload value to have a rollover each 100ms */
/* (5) Check if flags are reset */
/* (6) Refresh counter */
IWDG->KR = IWDG_START; /* (1) */
IWDG->KR = IWDG_WRITE_ACCESS; /* (2) */
IWDG->PR = IWDG_PR_PR_0; /* (3) */
IWDG->RLR = IWDG_RELOAD; /* (4) */
while(IWDG->SR) /* (5) */
{
/* add time out here for a robust application */
}
IWDG->KR = IWDG_REFRESH; /* (6) */
A.13.2 IWDG configuration with window code example
/* (1) Activate IWDG (not needed if done in option bytes) */
/* (2) Enable write access to IWDG registers */
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