ST STM32L0x3 User Manual

Code examples RM0367
1000/1043 RM0367 Rev 7
enable preload register on OC1 (OC1PE = 1)
enable clearing on OC1 for ETR clearing (OC1CE = 1)*/
/* (5) Select active high polarity on OC1 (CC1P = 0, reset value),
enable the output on OC1 (CC1E = 1)*/
/* (6) Select ETR as OCREF clear source (reserved bit = 1)
select External Trigger Prescaler off (ETPS = 00, reset value)
disable external clock mode 2 (ECE = 0, reset value)
select active at high level (ETP = 0, reset value) */
/* (7) Enable counter (CEN = 1)
select edge aligned mode (CMS = 00, reset value)
select direction as upcounter (DIR = 0, reset value) */
/* (8) Force update generation (UG = 1) */
TIMx->PSC = 15; /* (1) */
TIMx->ARR = 8; /* (2) */
TIMx->CCR1 = 4; /* (3) */
TIMx->CCMR1 |= TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1PE \
| TIM_CCMR1_OC1CE; /* (4) */
TIMx->CCER |= TIM_CCER_CC1E; /* (5) */
TIMx->SMCR |= (1<<3); /* (6) */
TIMx->CR1 |= TIM_CR1_CEN; /* (7) */
TIMx->EGR |= TIM_EGR_UG; /* (8) */
A.11.11 Encoder interface code example
/* (1) Configure TI1FP1 on TI1 (CC1S = 01)
configure TI1FP2 on TI2 (CC2S = 01) */
/* (2) Configure TI1FP1 and TI1FP2 non inverted (CC1P = CC2P = 0, reset
value) */
/* (3) Configure both inputs are active on both rising and falling edges
(SMS = 011) */
/* (4) Enable the counter by writing CEN=1 in the TIMx_CR1 register. */
TIMx->CCMR1 |= TIM_CCMR1_CC1S_0 | TIM_CCMR1_CC2S_0; /* (1 */
//TIMx->CCER &= (uint16_t)(~(TIM_CCER_CC21 | TIM_CCER_CC2P); /* (2) */
TIMx->SMCR |= TIM_SMCR_SMS_0 | TIM_SMCR_SMS_1; /* (3) */
TIMx->CR1 |= TIM_CR1_CEN; /* (4) */
A.11.12 Reset mode code example
/* (1) Configure channel 1 to detect rising edges on the TI1 input
by writing CC1S = ‘01’,
and configure the input filter duration by writing the IC1F[3:0]
bits
in the TIMx_CCMR1 register (if no filter is needed, keep
IC1F=0000).*/

ST STM32L0x3 Specifications

General

Brand	ST
Model	STM32L0x3
Category	Microcontrollers
Language	English