标题: STM32F103互补PWM带死区频率占空比可调源程序 [打印本页]
作者: 涂覆莉娜    时间: 2019-8-29 08:35
标题: STM32F103互补PWM带死区频率占空比可调源程序
最近做了STM32F103互补PWM带死区频率占空比可调，现在来分享一下。
从STM32的datashee可以看到下图

互补PWM我现在选择的是TIM1的通道1通道2通道3
上图可看出复用脚PA6 PA7 PB0 PB1
不复用的脚PB12 PB13 PB14 PB15,可以根据自己的引脚需求选择复用或者不复用，这些脚是输出互补的引脚，正向PWM引脚为PA8 PA9 PA10 PA11
这个功能其实也挺简单的，下面直接看附件代码。

单片机源程序如下:
  1. #include "PWM_Deadline.h"

  3. uint16_t CC1_Value = 1000,CC2_Value = 10000,CC3_Value = 20000;

  5. void TIM3_PWMShiftInit(void)
  6. {
  7.         TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  8.         TIM_OCInitTypeDef  TIM_OCInitStructure;
  9.         GPIO_InitTypeDef  GPIO_InitStruct;
  10.         TIM_BDTRInitTypeDef      TIM1_BDTRInitStruct;
  11.        
  12.         RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
  13.         RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB, ENABLE);
  14.        
  15.         GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;
  16.         GPIO_InitStruct.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_6 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12;
  17.         GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
  18.         GPIO_Init(GPIOA,&GPIO_InitStruct);
  19.        
  20.         GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;
  21.         GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
  22.         GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
  23.         GPIO_Init(GPIOB,&GPIO_InitStruct);
  24.        
  25.         GPIO_PinRemapConfig(GPIO_PartialRemap_TIM1, ENABLE);
  26. ////        GPIO_PinRemapConfig(GPIO_FullRemap_TIM1, ENABLE);
  27.         //TIM1_TIM2_TIM16
  28.         TIM_TimeBaseStructure.TIM_Period = 65534;//计数1000
  29.         TIM_TimeBaseStructure.TIM_Prescaler = 71;//48/n
  30.         TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
  31.         TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  32.         TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;

  34.         TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

  36.         TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  37.         TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  38.         TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  39.         TIM_OCInitStructure.TIM_Pulse = 100;
  40.         TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  41.         TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
  42.         TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
  43.         TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
  44.        
  45.         //配置死区
  46.         TIM1_BDTRInitStruct.TIM_OSSRState = TIM_OSSRState_Disable;
  47.         TIM1_BDTRInitStruct.TIM_OSSIState = TIM_OSSIState_Disable;
  48.         TIM1_BDTRInitStruct.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
  49.         TIM1_BDTRInitStruct.TIM_DeadTime = 10;
  50.         TIM1_BDTRInitStruct.TIM_Break = TIM_Break_Disable;
  51.         TIM1_BDTRInitStruct.TIM_BreakPolarity = TIM_BreakPolarity_High;
  52.         TIM1_BDTRInitStruct.TIM_AutomaticOutput = TIM_AutomaticOutput_Disable;
  53.         TIM_BDTRConfig(TIM1,&TIM1_BDTRInitStruct);

  55. //        TIM_OCInitStructure.TIM_Pulse = 900;
  56. //        TIM_ICInit(TIM1, &TIM_OCInitStructure);
  57. //        TIM_CCPreloadControl(TIM1, TIM_OCPreload_Enable);

  59.   TIM_OCInitStructure.TIM_Pulse = CC1_Value;
  60.         TIM_OC1Init(TIM1, &TIM_OCInitStructure);
  61.         TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
  62. //        TIM_Cmd(TIM1, ENABLE);
  63. //        TIM_CtrlPWMOutputs(TIM1, ENABLE);
  64.        
  65.         TIM_OCInitStructure.TIM_Pulse = CC2_Value;
  66.         TIM_OC2Init(TIM1, &TIM_OCInitStructure);//CH4可以正确输出，但CH1不行，全速转动，为什么？
  67.         TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
  68.        
  69.         TIM_OCInitStructure.TIM_Pulse = CC3_Value;
  70.         TIM_OC3Init(TIM1, &TIM_OCInitStructure);
  71.         TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
  72.        
  73.         TIM_Cmd(TIM1, ENABLE);
  74.         TIM_CtrlPWMOutputs(TIM1, ENABLE);
  75.        
  76. //        TIM_ITConfig(TIM1, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3, ENABLE);
  77.        
  78. //        TIM_ARRPreloadConfig(TIM1, ENABLE);

  80. }

  82. uint16_t Fre;
  83. void Dynami_Fre(void)
  84. {
  85.         TIM1->ARR = Fre;   //可调频率
  86.         if (Fre > 10000) Fre = 10000;
  87.         if (Fre < 1000) Fre = 1000;
  88.         Fre ++;
  89.         TIM_SetCompare1(TIM1, 100);  //占空比 = 100 / TIM1->ARR；
  90.         TIM_SetCompare2(TIM1, 200);  //占空比 = 200 / TIM1->ARR；
  91.         TIM_SetCompare3(TIM1, 300);  //占空比 = 300 / TIM1->ARR；
  92.        
  93. }


  96. uint16_t value1 = 0;
  97. void TIM1_CC_IRQHandler(void)
  98. {
  99.         uint16_t capture;
  100.         if (TIM_GetITStatus(TIM1, TIM_IT_CC1) != RESET)
  101.         {
  102.                 TIM_ClearITPendingBit(TIM1, TIM_IT_CC1 );
  103.                 capture = TIM_GetCapture1(TIM1);
  104.                 if (value1 > 20000) value1 = 20000;
  105.                 TIM_SetCompare1(TIM1, 10000);
  106.                 TIM1->ARR = 15000;
  107.         }
  108. //        if (TIM_GetITStatus(TIM1, TIM_IT_CC2) != RESET)
  109. //        {
  110. //                TIM_ClearITPendingBit(TIM1, TIM_IT_CC2 );
  111. //                capture = TIM_GetCapture2(TIM1);
  112. //                if (value1 > 20000) value1 = 20000;
  113. //                TIM_SetCompare1(TIM1, capture + CC2_Value/2);
  114. //        }
  115. //        if (TIM_GetITStatus(TIM1, TIM_IT_CC3) != RESET)
  116. //        {
  117. //                TIM_ClearITPendingBit(TIM1, TIM_IT_CC3 );
  118. //                capture = TIM_GetCapture3(TIM1);
  119. //                if (value1 > 20000) value1 = 20000;
  120. //                TIM_SetCompare1(TIM1, capture + CC3_Value/2);
  121. //        }
  122. }

  124. void NVIC_Configuration(void)
  125. {
  126. NVIC_InitTypeDef NVIC_InitStructure;




  131. NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);


  134. NVIC_InitStructure.NVIC_IRQChannel=TIM1_CC_IRQn;
  135. NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;
  136. NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
  137. NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
  138. NVIC_Init(&NVIC_InitStructure);
  139. }
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作者: waerdeng    时间: 2019-9-16 19:36

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