求教，TIM1互补输出模式，互补通道的占空比不能改变

woobruce

问题已解决，是在其他地方的疏忽以及自己观察不仔细造成的，属于愚蠢的错误，惭愧惭愧。。。。
无论如何，谢谢回复的朋友。
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大家好，最近在看网上的教程自学STM32，今天在试验高级定时器的互补输出时，遇到了一个问题。

具体是，输出通道和互补输出通道各接上一个LED来直观的观察效果。
按照例程配置和初始化定时器和通道后，CH1和CH1N上接的LED会根据初始化时设定的TIM_Pulse值，有不同的明暗度，CH1和CH1N的明暗度相反，这应该符合互补输出的特性。

但是，如果在main函数里修改TIM1->CCR1的值，主通道LED的亮度会变化，但接互补通道的LED亮度没有变化。

请问这是为什么？
希望大家指点一下。

初始化的代码：

1. RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);
   
2. 
   
3. /*--------------------时基结构体初始化-------------------------*/
   
4.         TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
   
5.         TIM_TimeBaseStructure.TIM_Period=(1000-1);               
   
6.         TIM_TimeBaseStructure.TIM_Prescaler= (72-1);               
   
7.         TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;               
   
8.         TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;               
   
9.         TIM_TimeBaseStructure.TIM_RepetitionCounter=0;        
   
10.         TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
    
11. 
    
12.         /*--------------------输出比较结构体初始化-------------------*/               
    
13.         TIM_OCInitTypeDef  TIM_OCInitStructure;
    
14.         TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    
15.         TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    
16.         TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;         //反向通道有效
    
17.         TIM_OCInitStructure.TIM_Pulse = 4;               
    
18.         TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
    
19.         TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
    
20.         TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
    
21.         TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
    
22.         TIM_OC1Init(ADVANCE_TIM, &TIM_OCInitStructure);
    
23.         TIM_OC1PreloadConfig(ADVANCE_TIM, TIM_OCPreload_Enable);               
    
24. 
    
25.         /*-------------------刹车和死区结构体初始化-------------------*/
    
26.         TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
    
27.   TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
    
28.   TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
    
29.   TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1;
    
30.   TIM_BDTRInitStructure.TIM_DeadTime = 11;
    
31.   TIM_BDTRInitStructure.TIM_Break = TIM_Break_Enable;
    
32.   TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
    
33.   TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
    
34.   TIM_BDTRConfig(ADVANCE_TIM, &TIM_BDTRInitStructure);
    
35.          
    
36.         // 使能计数器
    
37.         TIM_Cmd(ADVANCE_TIM, ENABLE);        
    
38.         TIM_CtrlPWMOutputs(ADVANCE_TIM, ENABLE);

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Main函数中的代码：实验结果是 只有主通道的LED出来呼吸灯效果，互补通道的LED一直不会动

1. if((Millis()-recMillis)<=(PWMLightCycle/2))
   
2.                 {
   
3.                         TIM1->CCR1=PWMmax*((Millis()-recMillis)/((float)PWMLightCycle/2));
   
4.                 }
   
5.                 else if((Millis()-recMillis)<=(PWMLightCycle))
   
6.                 {
   
7.                         TIM1->CCR1=PWMmax*(1-((Millis()-recMillis-(PWMLightCycle/2))/((float)PWMLightCycle/2)));
   
8.                 }
   
9.                 else
   
10.                 {
    
11.                         recMillis=Millis();
    
12.                 }

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toofree

首先对应的GPIO要配置为Alternate function push-pull模式，其次你的正向引作用，反向不起作用的话。
请检查输出模式是否正确。

toofree

请参考标准函数库例程“STM32F10x_StdPeriph_Examples\TIM\7PWM_Output”

1. /* Includes ------------------------------------------------------------------*/
   
2. #include "stm32f10x.h"
   
3. 
   
4. /** @addtogroup STM32F10x_StdPeriph_Examples
   
5.   * @{
   
6.   */
   
7. 
   
8. /** @addtogroup TIM_7PWM_Output
   
9.   * @{
   
10.   */
    
11. 
    
12. /* Private typedef -----------------------------------------------------------*/
    
13. /* Private define ------------------------------------------------------------*/
    
14. /* Private macro -------------------------------------------------------------*/
    
15. /* Private variables ---------------------------------------------------------*/
    
16. TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    
17. TIM_OCInitTypeDef  TIM_OCInitStructure;
    
18. uint16_t TimerPeriod = 0;
    
19. uint16_t Channel1Pulse = 0, Channel2Pulse = 0, Channel3Pulse = 0, Channel4Pulse = 0;
    
20. 
    
21. /* Private function prototypes -----------------------------------------------*/
    
22. void RCC_Configuration(void);
    
23. void GPIO_Configuration(void);
    
24. 
    
25. /* Private functions ---------------------------------------------------------*/
    
26. 
    
27. /**
    
28.   * @brief   Main program
    
29.   * @param  None
    
30.   * @retval None
    
31.   */
    
32. int main(void)
    
33. {
    
34.   /*!< At this stage the microcontroller clock setting is already configured,
    
35.        this is done through SystemInit() function which is called from startup
    
36.        file (startup_stm32f10x_xx.s) before to branch to application main.
    
37.        To reconfigure the default setting of SystemInit() function, refer to
    
38.        system_stm32f10x.c file
    
39.      */     
    
40.       
    
41.   /* System Clocks Configuration */
    
42.   RCC_Configuration();
    
43. 
    
44.   /* GPIO Configuration */
    
45.   GPIO_Configuration();
    
46. 
    
47.   /* TIM1 Configuration ---------------------------------------------------
    
48.    Generate 7 PWM signals with 4 different duty cycles:
    
49.    TIM1CLK = SystemCoreClock, Prescaler = 0, TIM1 counter clock = SystemCoreClock
    
50.    SystemCoreClock is set to 72 MHz for Low-density, Medium-density, High-density
    
51.    and Connectivity line devices and to 24 MHz for Low-Density Value line and
    
52.    Medium-Density Value line devices
    
53.    
    
54.    The objective is to generate 7 PWM signal at 17.57 KHz:
    
55.      - TIM1_Period = (SystemCoreClock / 17570) - 1
    
56.    The channel 1 and channel 1N duty cycle is set to 50%
    
57.    The channel 2 and channel 2N duty cycle is set to 37.5%
    
58.    The channel 3 and channel 3N duty cycle is set to 25%
    
59.    The channel 4 duty cycle is set to 12.5%
    
60.    The Timer pulse is calculated as follows:
    
61.      - ChannelxPulse = DutyCycle * (TIM1_Period - 1) / 100
    
62.   ----------------------------------------------------------------------- */
    
63.   /* Compute the value to be set in ARR regiter to generate signal frequency at 17.57 Khz */
    
64.   TimerPeriod = (SystemCoreClock / 17570 ) - 1;
    
65.   /* Compute CCR1 value to generate a duty cycle at 50% for channel 1 and 1N */
    
66.   Channel1Pulse = (uint16_t) (((uint32_t) 5 * (TimerPeriod - 1)) / 10);
    
67.   /* Compute CCR2 value to generate a duty cycle at 37.5%  for channel 2 and 2N */
    
68.   Channel2Pulse = (uint16_t) (((uint32_t) 375 * (TimerPeriod - 1)) / 1000);
    
69.   /* Compute CCR3 value to generate a duty cycle at 25%  for channel 3 and 3N */
    
70.   Channel3Pulse = (uint16_t) (((uint32_t) 25 * (TimerPeriod - 1)) / 100);
    
71.   /* Compute CCR4 value to generate a duty cycle at 12.5%  for channel 4 */
    
72.   Channel4Pulse = (uint16_t) (((uint32_t) 125 * (TimerPeriod- 1)) / 1000);
    
73. 
    
74.   /* Time Base configuration */
    
75.   TIM_TimeBaseStructure.TIM_Prescaler = 0;
    
76.   TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    
77.   TIM_TimeBaseStructure.TIM_Period = TimerPeriod;
    
78.   TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    
79.   TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
    
80. 
    
81.   TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
    
82. 
    
83.   /* Channel 1, 2,3 and 4 Configuration in PWM mode */
    
84.   TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
    
85.   TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    
86.   TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
    
87.   TIM_OCInitStructure.TIM_Pulse = Channel1Pulse;
    
88.   TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
    
89.   TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
    
90.   TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
    
91.   TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
    
92. 
    
93.   TIM_OC1Init(TIM1, &TIM_OCInitStructure);
    
94. 
    
95.   TIM_OCInitStructure.TIM_Pulse = Channel2Pulse;
    
96.   TIM_OC2Init(TIM1, &TIM_OCInitStructure);
    
97. 
    
98.   TIM_OCInitStructure.TIM_Pulse = Channel3Pulse;
    
99.   TIM_OC3Init(TIM1, &TIM_OCInitStructure);
    
100. 
     
101.   TIM_OCInitStructure.TIM_Pulse = Channel4Pulse;
     
102.   TIM_OC4Init(TIM1, &TIM_OCInitStructure);
     
103. 
     
104.   /* TIM1 counter enable */
     
105.   TIM_Cmd(TIM1, ENABLE);
     
106. 
     
107.   /* TIM1 Main Output Enable */
     
108.   TIM_CtrlPWMOutputs(TIM1, ENABLE);
     
109. 
     
110.   while (1)
     
111.   {}
     
112. }
     
113. 
     
114. /**
     
115.   * @brief  Configures the different system clocks.
     
116.   * @param  None
     
117.   * @retval None
     
118.   */
     
119. void RCC_Configuration(void)
     
120. {
     
121.   /* TIM1, GPIOA, GPIOB, GPIOE and AFIO clocks enable */
     
122.   RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOE|
     
123.                          RCC_APB2Periph_GPIOB |RCC_APB2Periph_AFIO, ENABLE);
     
124. }
     
125. 
     
126. /**
     
127.   * @brief  Configure the TIM1 Pins.
     
128.   * @param  None
     
129.   * @retval None
     
130.   */
     
131. void GPIO_Configuration(void)
     
132. {
     
133.   GPIO_InitTypeDef GPIO_InitStructure;
     
134. 
     
135. #ifdef STM32F10X_CL
     
136.   /* GPIOE Configuration: Channel 1/1N, 2/2N, 3/3N and 4 as alternate function push-pull */
     
137.   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_11|GPIO_Pin_13|GPIO_Pin_14|
     
138.                                 GPIO_Pin_8|GPIO_Pin_10|GPIO_Pin_12;
     
139.   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
     
140.   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
     
141. 
     
142.   GPIO_Init(GPIOE, &GPIO_InitStructure);
     
143. 
     
144.   /* TIM1 Full remapping pins */
     
145.   GPIO_PinRemapConfig(GPIO_FullRemap_TIM1, ENABLE);
     
146. 
     
147. #else
     
148.   /* GPIOA Configuration: Channel 1, 2 and 3 as alternate function push-pull */
     
149.   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
     
150.   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
     
151.   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
     
152.   GPIO_Init(GPIOA, &GPIO_InitStructure);
     
153. 
     
154.   /* GPIOB Configuration: Channel 1N, 2N and 3N as alternate function push-pull */
     
155.   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
     
156.   GPIO_Init(GPIOB, &GPIO_InitStructure);
     
157. 
     
158. #endif
     
159. }

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1. 
   

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stm1024

修改配置前：
TIM_Cmd(TIM1, DIABLE);
然后再修改配置，改完以后：
TIM_Cmd(TIM1, ENABLE);