[笔记]apm32f003 pwm输出,使用ch1和ch2需要重映射,需注意

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apm32f003 pwm输出,使用ch3,ch4不用重映射,但是使用ch1和ch2需要重映射,需要特别注意,否则ch1和ch无输出
TIM1-ch3  pc3  不需重映射
TIM1-ch4  pc4  不需重映射

TIM1-ch1  pc6  需重映射
TIM1-ch2  pc7  需重映射

1. void AFConfig(void)
   
2. {
   
3.     FMC_AFRConfig_T AFRConfig;
   
4. 
   
5.     /* Set PC6 alternate function = TMR1_CH1 */
   
6.     AFRConfig.AFR0 = FMC_OB_AFR_ENABLE;
   
7.     AFRConfig.AFR1 = FMC_OB_AFR_DISABLE;
   
8.     AFRConfig.AFR3 = FMC_OB_AFR_DISABLE;
   
9.     AFRConfig.AFR4 = FMC_OB_AFR_DISABLE;
   
10.     AFRConfig.AFR5 = FMC_OB_AFR_DISABLE;
    
11.     /* Set PC3 alternate function = TMR1_CH1N */
    
12.     AFRConfig.AFR7 = FMC_OB_AFR_ENABLE;
    
13. 
    
14.     FMC_Unlock();
    
15.     FMC_EraseOptionByte();
    
16.     FMC_ConfigOptionByteAFR(&AFRConfig);
    
17.     FMC_Lock();
    
18. }
    
19. 
    
20. void TMR1_Init(void)
    
21. {
    
22.     TMR1_OCConfig_T ocConfigStruct;
    
23.     TMR1_TimeBaseConfig_T timeBaseConfig;
    
24.        
    
25. 
    
26.     /* Up-counter */
    
27.     timeBaseConfig.cntMode = TMR1_CNT_MODE_UP;
    
28.     /* Set counter = 500 */
    
29.     timeBaseConfig.count = 500;
    
30.     /* Set divider = 47.So TMR1 clock freq ~= 24/(47 + 1) = 500KHZ */
    
31.     timeBaseConfig.divider = 47;
    
32.     /* Repetition counter = 0x0 */
    
33.     timeBaseConfig.repetitionCount = 0;
    
34.     TMR1_ConfigTimerBase(TMR1, &timeBaseConfig);
    
35. 
    
36.     /* Select channen1 3 */
    
37.     ocConfigStruct.channel = TMR1_CHANNEL_1;
    
38.     /* Set compare value = 250 */
    
39.     ocConfigStruct.count = 250;
    
40.     /* PWM1 mode */
    
41.     ocConfigStruct.mode = TMR1_OC_MODE_PWM1;
    
42.     /* Idle State is reset */
    
43.     ocConfigStruct.OCxIdleState = TMR1_OC_IDLE_RESET;
    
44.     /* Idle State is reset */
    
45.     ocConfigStruct.OCxNIdleState = TMR1_OC_IDLE_RESET;
    
46.     /* Disable CH1N ouput */
    
47.     ocConfigStruct.OCxNOutputState = TMR1_OC_OUTPUT_DISABLE;
    
48.     /* Enable CH1 ouput */
    
49.     ocConfigStruct.OCxOutputState = TMR1_OC_OUTPUT_ENABLE;
    
50.     /* CH1N polarity is high */
    
51.     ocConfigStruct.OCxNPolarity = TMR1_OC_POLARITY_HIGH;
    
52.     /* CH1 polarity is high */
    
53.     ocConfigStruct.OCxPolarity = TMR1_OC_POLARITY_HIGH;
    
54.     TMR1_ConfigOutputCompare(TMR1, &ocConfigStruct);
    
55. 
    
56.     /* Enable PWM output */
    
57.     TMR1_EnableOutputPWM(TMR1);
    
58. 
    
59.     /* Enable TMR1  */
    
60.     TMR1_Enable(TMR1);
    
61. }

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