ST STM32F102 series User Manual

General-purpose timer (TIMx) RM0008
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timers. Timer 2 stops when Timer 1 is disabled by writing ‘0’ to the CEN bit in the TIM1_CR1
register:
● Configure Timer 1 master mode to send its Output Compare 1 Reference (OC1REF)
signal as trigger output (MMS=100 in the TIM1_CR2 register).
● Configure the Timer 1 OC1REF waveform (TIM1_CCMR1 register).
● Configure Timer 2 to get the input trigger from Timer 1 (TS=000 in the TIM2_SMCR
register).
● Configure Timer 2 in gated mode (SMS=101 in TIM2_SMCR register).
● Reset Timer 1 by writing ‘1’ in UG bit (TIM1_EGR register).
● Reset Timer 2 by writing ‘1’ in UG bit (TIM2_EGR register).
● Initialize Timer 2 to 0xE7 by writing ‘0xE7’ in the timer 2 counter (TIM2_CNTL).
● Enable Timer 2 by writing ‘1’ in the CEN bit (TIM2_CR1 register).
● Start Timer 1 by writing ‘1’ in the CEN bit (TIM1_CR1 register).
● Stop Timer 1 by writing ‘0’ in the CEN bit (TIM1_CR1 register).
Figure 137. Gating timer 2 with Enable of timer 1
TIMER 2-TIF
Write TIF=0
75 00 01
CK_INT
TIMER1-CEN=CNT_EN
TIMER1-CNT
TIMER2-CNT
02
TIMER1-CNT_INIT
AB 00 E7 E8 E9
TIMER2-CNT_INIT
TIMER2
write CNT

ST STM32F102 series Specifications

General

Brand	ST
Model	STM32F102 series
Category	Microcontrollers
Language	English