STM8S TIM1寄存器 PWM呼吸灯: L, n v7 B! ~" D
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6 A( X3 G0 u+ K1.TIM1 初始化0 t) U; s" \+ X$ ^/ G( r% T
- void TIM1_Init(void)
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/ T" {* n% Q( j7 H% H+ [9 [ - TIM1_PSCRH = 0;' F* r# V. P2 O& p6 t) A: H( {- J
- TIM1_PSCRL = 15; //(15+1)分频为1M! H: f8 Q/ ?; M% S# e9 X) x( n
- TIM1_ARRH = 0x03;
& G, U( V a" f' M$ T9 w+ K4 \8 ] - TIM1_ARRL = 0xE8; //每1000us中断一次" s5 `$ {% L$ w' n0 R' J. A
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% {% t8 X0 a8 C5 [9 r( \3 J c - TIM1_CCMR2_OC2M = 6; //PWM2模式12 @$ Z! i3 \* B4 I% K& ?+ z3 Q
- TIM1_CCER1_CC2E = 1; //CC2引脚使能$ E$ n: N" [( `( M% f
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- TIM1_CCMR3_OC3M = 6; //PWM3模式1- P: m" ?3 K4 D' F! P
- TIM1_CCER2_CC3E = 1; //CC3引脚使能% `, [) S7 T0 h( \# [* ]% Y
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- TIM1_CCR2H = 0X00; //DUTY / s! `8 V) v( x8 z3 y
- TIM1_CCR2L = 0x00;
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- TIM1_CCR3H = 0X00; //DUTY
1 }1 i+ k: V! L& E! h: p$ [9 k - TIM1_CCR3L = 0x00;
8 w& b5 X7 S8 C - TIM1_BKR |= 0x80; //设置刹车寄存器4 W& f) a7 L1 |0 v* } |' ~
- TIM1_IER = 0x01; //允许更新中断
/ ~! }1 C* s5 P J# A" W - TIM1_CR1 = 0x01; //计数器使能,开始计数
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2.设置占空比
$ W8 G" b2 s; ?1 U8 T% a9 V3 @: A5 H- void pwm1_duty(u16 duty)
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9 J" j; S8 n' Z. ~ - TIM1_CCR2H=duty>>8;9 e, k* y, q O6 }3 k6 n
- TIM1_CCR2L=(u8)(duty); z3 i8 x; u5 q
- TIM1_CCR3H=duty>>8;
& J' ^ X7 v, Z0 M$ B* z" j6 l$ e - TIM1_CCR3L=(u8)(duty);
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3.呼吸, u# \0 E, s% t/ U! o5 B; K
- while(1)3 k, n+ f! V! Q
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- if(key_value>=1000) dir=0;
3 r' A' S' V, C8 }, q- Z7 r. r$ v - if(key_value<=1) dir=1;. M$ K% T* ~0 [) u4 D8 J( b
- if(dir) key_value++;
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`+ B+ ~; D r( J; T - pwm1_duty(key_value);* w+ B% ]1 k8 ~
- delay_ms(3);5 k: A$ u8 ]) ^
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: f2 P; ^% y: t2 P3 d: E% f4 S4.实验现象:0 F/ P) v0 Z3 K9 w* ~1 ?
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