想问一下为什么这样开时钟3的四个通道失败了，最后好像只有两个通道输出了

kkkk233

1. 
   

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想问一下为什么这样开TIM3的四个通道失败了，而且最后好像只有两个通道输出了pwm波.是这个RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
          RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
不能写一起吗？

peng1554

看不到代码~

A571157242

可以写一起

狼里个狼121

写一起不影响的，检查一下是不是代码哪里有问题导致的

kkkk233

1. #include "timer.h"
   
2. #include "led.h"
   
3. #include "usart.h"
   
4. //////////////////////////////////////////////////////////////////////////////////         
   
5. //±¾3ìDòÖ»1©Ñ§Ï°ê1óÃ￡¬Î′¾-×÷ÕßDí¿é￡¬2»μÃóÃóúÆäËüèÎoÎóÃí¾
   
6. //ALIENTE¾«ó￠STM32¿a·￠°å
   
7. //¶¨ê±Æ÷ Çy¶ˉ′úÂë          
   
8. //ÕyμãÔ-×ó@ALIENTEK
   
9. //¼¼êõÂÛì3:www.openedv.com
   
10. //DT¸ÄèÕÆú:2012/9/4
    
11. //°æ±¾￡oV1.1
    
12. //°æè¨ËùóD￡¬μá°æ±Ø¾¿¡￡
    
13. //Copyright(C) 1ãÖYêDDÇòíμç×ó¿Æ¼¼óDÏT1«Ë¾ 2009-2019
    
14. //All rights reserved                                                                          
    
15. //********************************************************************************
    
16. 
    
17. //TIM3 PWM2¿·Ö3õê¼»ˉ
    
18. //PWMêä3ö3õê¼»ˉ
    
19. //arr￡o×Ô¶ˉÖØ×°Öμ
    
20. //psc￡oê±ÖóÔ¤·ÖÆμêy
    
21. void TIM3_PWM_Init(u16 arr,u16 psc)
    
22. {  
    
23.         GPIO_InitTypeDef GPIO_InitStructure;
    
24.         TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    
25.         TIM_OCInitTypeDef  TIM_OCInitStructure;
    
26. 
    
27.         RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);   //ê1Äü¶¨ê±Æ÷3
    
28.         RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);  //ê1ÄüGPIOíaéèoíAFIO¸′óÃ1|ÄüÄ￡¿éê±Öó
    
29.         RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
    
30.        
    
31.         GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7; //TIM_3CH1|2
    
32.         GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //¸′óÃíÆíìêä3ö
    
33.         GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    
34.         GPIO_Init(GPIOA, &GPIO_InitStructure); //3õê¼»ˉGPIO.A
    
35.        
    
36.         GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1; //TIM_3CH13|4
    
37.         GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //¸′óÃíÆíìêä3ö
    
38.         GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    
39.         GPIO_Init(GPIOB, &GPIO_InitStructure); //3õê¼»ˉGPIO.B
    
40. 
    
41.         TIM_TimeBaseStructure.TIM_Period = arr; //éèÖÃÔúÏÂò»¸ö¸üDÂê¼t×°èë»î¶ˉμÄ×Ô¶ˉÖØ×°ÔؼÄ′æÆ÷ÖüÆúμÄÖμ         80K
    
42.         TIM_TimeBaseStructure.TIM_Prescaler =psc; //éèÖÃóÃà′×÷ÎaTIMxê±ÖóÆμÂê3yêyμÄÔ¤·ÖÆμÖμ  2»·ÖÆμ
    
43.         TIM_TimeBaseStructure.TIM_ClockDivision = 0; //éèÖÃê±Öó·Ö¸î:TDTS = Tck_tim
    
44.         TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIMÏòéϼÆêyÄ￡ê½
    
45.         TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //¸ù¾YTIM_TimeBaseInitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉTIMxμÄê±¼ä»ùêyμ￥λ
    
46. 
    
47.   //3õê¼»ˉTIM2 Channel2 PWMÄ￡ê½         
    
48.         TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //Ñ¡Ôñ¶¨ê±Æ÷Ä￡ê½:TIMÂö3å¿í¶èμ÷ÖÆÄ￡ê½2
    
49.         TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //±è½Ïêä3öê1Äü
    
50.         TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //êä3ö¼«DÔ:TIMêä3ö±è½Ï¼«DÔ¸ß
    
51.         TIM_OC1Init(TIM3, &TIM_OCInitStructure);  //¸ù¾YTÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèTIM3 OC1
    
52.         TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);  //ê1ÄüTIM2ÔúCCR1éÏμÄԤװÔؼÄ′æÆ÷
    
53. 
    
54.         TIM_OC2Init(TIM3, &TIM_OCInitStructure);  //¸ù¾YTÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèTIM3 OC2
    
55.         TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);  //ê1ÄüTIM2ÔúCCR2éÏμÄԤװÔؼÄ′æÆ÷
    
56.        
    
57.         TIM_OC3Init(TIM3, &TIM_OCInitStructure);  //¸ù¾YTÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèTIM3 OC3
    
58.         TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);  //ê1ÄüTIM2ÔúCCR3éÏμÄԤװÔؼÄ′æÆ÷
    
59. 
    
60.         TIM_OC4Init(TIM3, &TIM_OCInitStructure);  //¸ù¾YTÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèTIM3 OC4
    
61.         TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);  //ê1ÄüTIM2ÔúCCR4éÏμÄԤװÔؼÄ′æÆ÷
    
62.        
    
63.         TIM_Cmd(TIM3, ENABLE);  //ê1ÄüTIM3
    
64. 
    
65. }
    
66. 
    
67. 
    
68. void TIM3_Int_Init(u16 arr,u16 psc)
    
69. {
    
70.   TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    
71.         NVIC_InitTypeDef NVIC_InitStructure;
    
72. 
    
73.         RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //ê±Öóê1Äü
    
74. 
    
75.         TIM_TimeBaseStructure.TIM_Period = arr; //éèÖÃÔúÏÂò»¸ö¸üDÂê¼t×°èë»î¶ˉμÄ×Ô¶ˉÖØ×°ÔؼÄ′æÆ÷ÖüÆúμÄÖμ         ¼Æêyμ½5000Îa500ms
    
76.         TIM_TimeBaseStructure.TIM_Prescaler =psc; //éèÖÃóÃà′×÷ÎaTIMxê±ÖóÆμÂê3yêyμÄÔ¤·ÖÆμÖμ  10KhzμļÆêyÆμÂê  
    
77.         TIM_TimeBaseStructure.TIM_ClockDivision = 0; //éèÖÃê±Öó·Ö¸î:TDTS = Tck_tim
    
78.         TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIMÏòéϼÆêyÄ￡ê½
    
79.         TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //¸ù¾YTIM_TimeBaseInitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉTIMxμÄê±¼ä»ùêyμ￥λ
    
80. 
    
81.         TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //ê1ÄüÖ¸¶¨μÄTIM3ÖD¶Ï,ÔêDí¸üDÂÖD¶Ï
    
82. 
    
83.         NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;  //TIM3ÖD¶Ï
    
84.         NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  //ÏèÕ¼óÅÏ輶0¼¶
    
85.         NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;  //′óóÅÏ輶3¼¶
    
86.         NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μà±»ê1Äü
    
87.         NVIC_Init(&NVIC_InitStructure);  //¸ù¾YNVIC_InitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèNVIC¼Ä′æÆ÷
    
88. 
    
89.         TIM_Cmd(TIM3, ENABLE);  //ê1ÄüTIMxíaéè
    
90.                                                          
    
91. }
    
92. //¶¨ê±Æ÷3ÖD¶Ï·tÎñ3ìDò
    
93. void TIM3_IRQHandler(void)   //TIM3ÖD¶Ï
    
94. {
    
95.         if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) //¼ì2éÖ¸¶¨μÄTIMÖD¶Ï·￠éúóë·ñ:TIM ÖD¶ÏÔ′
    
96.                 {
    
97.                 TIM_ClearITPendingBit(TIM3, TIM_IT_Update  );  //Çå3yTIMxμÄÖD¶Ï′y′|àíλ:TIM ÖD¶ÏÔ′
    
98.                 LED1=!LED1;
    
99.                 }
    
100. }
     
101. 
     

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