ST STM32L0x3 User Manual

RM0367 Rev 7 1005/1043
RM0367 Code examples
1020
/* (3) Configure TIMy in slave mode using ITR1 as internal trigger
by writing TS = 000 in TIMy_SMCR (reset value)
Configure TIMy in gated mode, by writing SMS=101 in the
TIMy_SMCR register. */
/* (4) Set TIMx prescaler to 2 */
/* (5) Set TIMy prescaler to 2 */
/* (6) Set TIMx Autoreload to 99 in order to get an overflow (so an UEV)
each 10ms */
/* (7) Set capture compare register to a value between 0 and 99 */
TIMx->CR2 |= TIM_CR2_MMS_0; /* (1 */
TIMx->CCMR1 |= TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC1M_1; /* (2) */
TIMy->SMCR |= TIM_SMCR_SMS_2 | TIM_SMCR_SMS_0; /* (3) */
TIMx->PSC = 2; /* (4) */
TIMy->PSC = 2; /* (5) */
TIMx->ARR = 99; /* (6) */
TIMx-> CCR1 = 25; /* (7) */
/* Configure the slave timer Channel 1 as PWM as Timer to show
synchronicity */
/* (1) Configure the Timer y in PWM mode 1 (write OC1M = 110) */
/* (2) Set TIMx Autoreload to 99 */
/* (3) Set capture compare register to 25 */
TIMy->CCMR1 |= TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC1M_1; /* (1) */
TIMy->ARR = 99; /* (2) */
TIMy-> CCR1 = 25; /* (3) */
/* Enable the output of TIMx OC1 */
/* (1) Select active high polarity on OC1 (CC1P = 0, reset value),
enable the output on OC1 (CC1E = 1 */
/* (2) Enable output (MOE = 1 */
TIMx->CCER |= TIM_CCER_CC1E;
/* Enable the output of TIMy OC1 */
/* (1) Select active high polarity on OC1 (CC1P = 0, reset value),
enable the output on OC1 (CC1E = 1 */
/* (2) Enable output (MOE = 1 */
TIMy->CCER |= TIM_CCER_CC1E;
/* (1) Reset Timer x by writing ‘1 in UG bit (TIMx_EGR register) */
/* (2) Reset Timer y by writing ‘1 in UG bit (TIMy_EGR register) */
TIMx->EGR |= TIM_EGR_UG;
TIMy->EGR |= TIM_EGR_UG;
/* (1) Enable the slave counter first by writing CEN=1
in the TIMy_CR1 register.
TIMy will start synchronously with the master timer*/
/* (2) Start the master counter by writing CEN=1 in the TIMx_CR1
register. */

ST STM32L0x3 Specifications

General

Brand	ST
Model	STM32L0x3
Category	Microcontrollers
Language	English