STM8S TIM1寄存器 PWM呼吸灯
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1.TIM1 初始化
, A. Z, {! l: ]5 G# _+ m- |- void TIM1_Init(void) { v& F& T; s% L
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- TIM1_PSCRH = 0;2 y6 M' w8 H' ~' z/ N; p
- TIM1_PSCRL = 15; //(15+1)分频为1M
# t4 X. @& F6 U- { - TIM1_ARRH = 0x03;
! T: J( [9 Q- y* t) N7 k1 k - TIM1_ARRL = 0xE8; //每1000us中断一次2 y! l3 |3 X) L" o- l$ A; }+ g
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- TIM1_CCMR2_OC2M = 6; //PWM2模式17 f+ _ S9 Y# N8 N# j
- TIM1_CCER1_CC2E = 1; //CC2引脚使能/ p7 G, _1 t& d! O/ [
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- TIM1_CCMR3_OC3M = 6; //PWM3模式1
: }# c5 J+ S' j9 Z- I0 v6 h - TIM1_CCER2_CC3E = 1; //CC3引脚使能
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7 U1 P3 I8 N/ @ g5 W. t5 Z - TIM1_CCR2H = 0X00; //DUTY + P# ]$ {' Z0 N7 @0 W
- TIM1_CCR2L = 0x00;
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8 m' l# F9 h- L0 y+ o4 C$ v - TIM1_CCR3H = 0X00; //DUTY
) M' A+ v8 ~7 [' A; Q. R9 |/ u& X - TIM1_CCR3L = 0x00; * K8 t5 j0 e7 Y8 A5 x4 a9 u
- TIM1_BKR |= 0x80; //设置刹车寄存器
% W- Y# |% e& J- S - TIM1_IER = 0x01; //允许更新中断6 y* L9 S+ ~7 j6 L
- TIM1_CR1 = 0x01; //计数器使能,开始计数
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2.设置占空比& x H2 X# ^7 }* \/ `
- void pwm1_duty(u16 duty)( Q, e( B9 r! |- y1 m( N8 ?
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- TIM1_CCR2H=duty>>8;
# O& i7 G" q2 R; H1 b9 E - TIM1_CCR2L=(u8)(duty);& v: ~, m3 `+ D* N
- TIM1_CCR3H=duty>>8;& r( r8 @) [$ Q* u. ^
- TIM1_CCR3L=(u8)(duty);6 A" d7 M5 ]1 @: N- L2 ~2 `
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3.呼吸
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- if(key_value>=1000) dir=0;
8 h9 r# o4 G6 m. I5 L4 `) Q - if(key_value<=1) dir=1;* ^# @- ]/ b8 F F
- if(dir) key_value++;& G4 d9 ~2 K: X9 C+ v$ ~ b7 n- T
- else key_value--;' N0 J& t Q! ?* i# h/ q( P, w" Q, Q
- pwm1_duty(key_value);& t) l7 Y- [8 r
- delay_ms(3);% Z. u- j& L8 X9 r
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