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本帖最后由 yxlk 于 2019-7-18 17:55 编辑 ' D4 U+ P0 S+ t: H, t
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void TIM4_Configuration(void)$ I) B% h5 n2 h: T
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u32 temp;' h; \5 @* X; u0 a
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;1 ~; A3 }3 `0 W. N% x5 I
TIM_OCInitTypeDef TIM_OCInitStruct;4 A7 m- r6 P7 ?% ]2 |7 p; k2 ^# R9 F- y8 G
" s/ P' d3 P5 T5 f temp = SystEMCoreClock / 1000000;+ P4 Z' f! z' ?; W. K) y
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
1 d# B/ X6 k' C- R6 G+ N5 E TIM_DeInit(TIM4);
$ g5 M& ^- N9 Z1 A" G6 M if(SystemCoreClock > 36000000)
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TIM_TimeBaseInitStruct.TIM_Prescaler = 1;0 f! [0 U. r+ y& l7 C
TIM_TimeBaseInitStruct.TIM_Period = PWM_Period * temp / 2;5 r1 Q5 {) j3 z5 ?5 q
TIM_OCInitStruct.TIM_Pulse = PWM_Recharge * temp / 2;* A7 J7 B0 }! O& X+ P; e: I
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else
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TIM_TimeBaseInitStruct.TIM_Prescaler = 0;
- i+ P% O. _ x& @, W3 }& ` TIM_TimeBaseInitStruct.TIM_Period = PWM_Period * temp;" z" D. v: X* k* J' l. n
TIM_OCInitStruct.TIM_Pulse = PWM_Recharge * temp;6 C' u1 N8 N; d# i) z
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TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
" x# x+ F* u2 u# ~' [( a: M TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;) ~4 E# ?7 E3 w- p$ \
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseInitStruct);
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5 O Q @% d. w; f- Q5 _ TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM1;
$ u! N$ G/ b9 m TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Disable;
2 ` S9 p) t& t1 {- z TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;
' i: {7 V5 N! q% t0 L( I TIM_OC1Init(TIM4, &TIM_OCInitStruct);4 l* f) W' J" t0 f! ^1 a; L
TIM_OC2Init(TIM4, &TIM_OCInitStruct);0 H$ X3 K ]' k) V2 L3 h% ~
TIM_OC3Init(TIM4, &TIM_OCInitStruct);
: s X1 \/ l3 q; e0 J, D8 y O TIM_OC4Init(TIM4, &TIM_OCInitStruct);9 l/ p9 l8 e& b4 q" z$ S$ N& U2 }
7 ~! h2 r3 p5 a0 a# i TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable);) P; P/ ~9 N: Y- F! @
TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);4 L8 u9 B, t/ n, @' b! P
TIM_OC3PreloadConfig(TIM4, TIM_OCPreload_Enable);
3 V! E! S$ b: F1 w TIM_OC4PreloadConfig(TIM4, TIM_OCPreload_Enable);
, K! E* F% J/ X: H7 t4 C e) g) m8 b TIM_CCxCmd(TIM4, TIM_Channel_1, TIM_CCx_Enable);
' M, d: v/ H. k- n TIM_CCxCmd(TIM4, TIM_Channel_2, TIM_CCx_Enable);3 D/ V6 k0 C& \* x- ]' ^' W
TIM_CCxCmd(TIM4, TIM_Channel_3, TIM_CCx_Enable);* _4 |* f2 D5 l2 Z
TIM_CCxCmd(TIM4, TIM_Channel_4, TIM_CCx_Enable);( q! h. D; v' q$ x$ F
TIM_ARRPreloadConfig(TIM4, ENABLE);
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TIM_CleaRFlag(TIM4, TIM_FLAG_Update);
. N2 L1 r7 y: y TIM_ITConfig(TIM4, TIM_IT_Update, ENABLE);/ M; z3 F# i R' N ^2 L3 H7 O3 }
TIM_Cmd(TIM4, ENABLE);
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. @% E5 A; N7 { TIM_CCxCmd(TIM4, TIM_Channel_2, TIM_CCx_Disable); //放在这里面起作用9 G; K' B; T8 H/ m/ ~
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。
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TIM4_Configuration();
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//期望随时单独失能某一通道，但这样不起作用： $ K4 l# f5 C7 s, h1 n
TIM_CCxCmd(TIM4, TIM_Channel_2, TIM_CCx_Disable);
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发表于 2019-7-18 17:26
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反对！