STM32F407IGT6 PB9无法输出PWM波

chenbingjy

上程序

1. #include "main.h"
   
2. #include "Board.h"
   
3. 
   
4. /* Private includes *******************************************************/
   
5. 
   
6. /* Private macro **********************************************************/
   
7. 
   
8. /* printf function configs to USART1*/
   
9. #define DEBUG_USART  USART1
   
10. 
    
11. #define DIV 83
    
12. 
    
13. /* Private typedef ********************************************************/
    
14. 
    
15. /* Private variables ******************************************************/
    
16. 
    
17. /* Private function prototypes ********************************************/
    
18. 
    
19. /* External variables *****************************************************/
    
20. 
    
21. /* External functions *****************************************************/
    
22. 
    
23. /*!
    
24. * @brief       Main program
    
25. *
    
26. * [url=home.php?mod=space&uid=271674]@param[/url]       None
    
27. *
    
28. * @retval      None
    
29. */
    
30. int main(void)
    
31. {
    
32.     GPIO_Config_T GPIO_ConfigStruct;
    
33.     TMR_BaseConfig_T TMR_TimeBaseStruct;
    
34.     TMR_OCConfig_T OCcongigStruct;
    
35. 
    
36.     RCM_EnableAPB1PeriphClock(RCM_APB1_PERIPH_TMR4);
    
37.     RCM_EnableAHB1PeriphClock(RCM_AHB1_PERIPH_GPIOB);
    
38. 
    
39.     /* TMR2_CH1 */
    
40.     GPIO_ConfigPinAF(GPIOB, GPIO_PIN_SOURCE_0, GPIO_AF_TMR4);
    
41.     /* TMR2_CH2 */
    
42.     GPIO_ConfigPinAF(GPIOB, GPIO_PIN_SOURCE_1, GPIO_AF_TMR4);
    
43.     /* TMR2_CH3 */
    
44.     GPIO_ConfigPinAF(GPIOB, GPIO_PIN_SOURCE_2, GPIO_AF_TMR4);
    
45.     /* TMR2_CH4 */
    
46.     GPIO_ConfigPinAF(GPIOB, GPIO_PIN_SOURCE_3, GPIO_AF_TMR4);
    
47. 
    
48.     /* Config TMR2 GPIO for output PWM */
    
49.     GPIO_ConfigStruct.pin = GPIO_PIN_0|GPIO_PIN_1| GPIO_PIN_2| GPIO_PIN_9;
    
50.     GPIO_ConfigStruct.mode = GPIO_MODE_AF;
    
51.     GPIO_ConfigStruct.otype = GPIO_OTYPE_PP;
    
52.     GPIO_ConfigStruct.speed = GPIO_SPEED_100MHz;
    
53.     GPIO_Config(GPIOB, &GPIO_ConfigStruct);
    
54. 
    
55.     /* config TMR2 */
    
56.     TMR_TimeBaseStruct.clockDivision = TMR_CLOCK_DIV_1;
    
57.     TMR_TimeBaseStruct.countMode = TMR_COUNTER_MODE_UP;
    
58.     TMR_TimeBaseStruct.division = DIV;
    
59.     TMR_TimeBaseStruct.period = 999;
    
60.     TMR_ConfigTimeBase(TMR4, &TMR_TimeBaseStruct);
    
61. 
    
62.     /* Configure channel1 */
    
63.     TMR_ConfigOCStructInit(&OCcongigStruct);
    
64. 
    
65.     OCcongigStruct.mode = TMR_OC_MODE_PWM1;
    
66.     OCcongigStruct.outputState = TMR_OC_STATE_ENABLE;
    
67.     OCcongigStruct.polarity = TMR_OC_POLARITY_HIGH;
    
68. 
    
69.     OCcongigStruct.pulse = 800;
    
70.     TMR_ConfigOC1(TMR4, &OCcongigStruct);
    
71.     TMR_ConfigOC1Preload(TMR4, TMR_OC_PRELOAD_ENABLE);
    
72. 
    
73.     /* Configure channel2 */
    
74.     OCcongigStruct.pulse = 700;
    
75.     TMR_ConfigOC2(TMR4, &OCcongigStruct);
    
76.     TMR_ConfigOC2Preload(TMR4, TMR_OC_PRELOAD_ENABLE);
    
77. 
    
78.     /* Configure channel3 */
    
79.     OCcongigStruct.pulse = 600;
    
80.     TMR_ConfigOC3(TMR4, &OCcongigStruct);
    
81.     TMR_ConfigOC3Preload(TMR4, TMR_OC_PRELOAD_ENABLE);
    
82. 
    
83.     /* Configure channel4 */
    
84.     OCcongigStruct.pulse = 500;
    
85.     TMR_ConfigOC4(TMR4, &OCcongigStruct);
    
86.     TMR_ConfigOC4Preload(TMR4, TMR_OC_PRELOAD_ENABLE);
    
87. 
    
88.     TMR_EnableAutoReload(TMR4);
    
89.     TMR_Enable(TMR4);
    
90. 
    
91.     while(1)
    
92.     {
    
93.     }
    
94. }
    

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请问高手，如何解决？谢谢