欧美极品高清xxxxhd,国产日产欧美最新,无码AV国产东京热AV无码,国产精品人与动性XXX,国产传媒亚洲综合一区二区,四库影院永久国产精品,毛片免费免费高清视频,福利所导航夜趣136

標(biāo)題: bsp_pwm_output [打印本頁(yè)]
作者: 小譚1111    時(shí)間: 2019-7-19 14:30
標(biāo)題: bsp_pwm_output
  1. #include "bsp_pwm_output.h"

  3. /**
  4.   * @brief  配置TIM3復(fù)用輸出PWM時(shí)用到的I/O
  5.   * @param  無
  6.   * @retval 無
  7.   */
  8. static void TIMx_GPIO_Config(void)
  9. {
  10.   GPIO_InitTypeDef GPIO_InitStructure;
  11.    
  12.     RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB| RCC_APB2Periph_AFIO,ENABLE);
  13.     GPIO_PinRemapConfig(GPIO_Remap_SWJ_NoJTRST, ENABLE);  //PB4
  14.     GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3, ENABLE);
  15.     GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
  16.     GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  17.     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  18.     GPIO_Init(GPIOB, &GPIO_InitStructure);

  20. //  /*GPIOB Configuration: TIM3 channel 2 as alternate function push-pull */
  21. //  GPIO_InitStructure.GPIO_Pin =  macTIM_CH2_PIN;
  22. //  GPIO_Init(macTIM_CH2_PORT, &GPIO_InitStructure);


  25. }

  27. /**
  28.   * @brief  配置TIM3輸出的PWM信號(hào)的模式，如周期、極性、占空比
  29.   * @param  無
  30.   * @retval 無
  31.   */
  32. /*
  33. * TIMxCLK/CK_PSC --> TIMxCNT --> TIMx_ARR --> TIMxCNT 重新計(jì)數(shù)
  34. *                    TIMx_CCR(電平發(fā)生變化)
  35. * 信號(hào)周期=(TIMx_ARR +1 ) * 時(shí)鐘周期
  36. * 占空比=TIMx_CCR/(TIMx_ARR +1)
  37. */
  38. static void TIMx_Mode_Config(void)
  39. {
  40.         TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  41.         TIM_OCInitTypeDef  TIM_OCInitStructure;

  43.         /* PWM信號(hào)電平跳變值 */
  44.         u16 CCR1_Val = 500;        
  45.         u16 CCR2_Val = 0;
  46. //         u16 CCR3_Val = 250;
  47. //         u16 CCR4_Val = 125;

  49. /* -----------------------------------------------------------------------
  50.     macTIMx Channel1 duty cycle = (macTIMx_CCR1/ macTIMx_ARR+1)* 100% = 50%
  51.     macTIMx Channel2 duty cycle = (macTIMx_CCR2/ macTIMx_ARR+1)* 100% = 37.5%
  52.     macTIMx Channel3 duty cycle = (macTIMx_CCR3/ macTIMx_ARR+1)* 100% = 25%
  53.     macTIMx Channel4 duty cycle = (macTIMx_CCR4/ macTIMx_ARR+1)* 100% = 12.5%
  54.   ----------------------------------------------------------------------- */

  56.   /* Time base configuration */                 
  57.   TIM_TimeBaseStructure.TIM_Period = 999;       //當(dāng)定時(shí)器從0計(jì)數(shù)到999，即為1000次，為一個(gè)定時(shí)周期
  58.   TIM_TimeBaseStructure.TIM_Prescaler = 0;            //設(shè)置預(yù)分頻：不預(yù)分頻，即為72MHz
  59.   TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1 ;        //設(shè)置時(shí)鐘分頻系數(shù)：不分頻(這里用不到)
  60.   TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //向上計(jì)數(shù)模式
  61.   TIM_TimeBaseInit(macTIMx, &TIM_TimeBaseStructure);

  63.   /* PWM1 Mode configuration: Channel1 */
  64.   TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;            //配置為PWM模式1
  65.   TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;       
  66.   TIM_OCInitStructure.TIM_Pulse = CCR1_Val;           //設(shè)置跳變值，當(dāng)計(jì)數(shù)器計(jì)數(shù)到這個(gè)值時(shí)，電平發(fā)生跳變
  67.   TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;  //當(dāng)定時(shí)器計(jì)數(shù)值小于CCR1_Val時(shí)為高電平
  68.   TIM_OC1Init(macTIMx, &TIM_OCInitStructure);         //使能通道1
  69.   TIM_OC1PreloadConfig(macTIMx, TIM_OCPreload_Enable);

  71. //  /* PWM1 Mode configuration: Channel2 */
  72.   TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  73.   TIM_OCInitStructure.TIM_Pulse = CCR2_Val;          //設(shè)置通道2的電平跳變值，輸出另外一個(gè)占空比的PWM
  74.   TIM_OC2Init(macTIMx, &TIM_OCInitStructure);          //使能通道2
  75.   TIM_OC2PreloadConfig(macTIMx, TIM_OCPreload_Enable);


  78.   TIM_ARRPreloadConfig(macTIMx, ENABLE);                         // 使能TIM3重載寄存器ARR

  80.   /* TIM3 enable counter */
  81.   TIM_Cmd(macTIMx, ENABLE);                   //使能定時(shí)器3
  82. }

  84. /**
  85.   * @brief  TIM3 輸出PWM信號(hào)初始化，只要調(diào)用這個(gè)函數(shù)
  86.   *         TIM3的四個(gè)通道就會(huì)有PWM信號(hào)輸出
  87.   * @param  無
  88.   * @retval 無
  89.   */
  90. void TIMx_PWM_Init(void)
  91. {
  92.         TIMx_GPIO_Config();
  93.         TIMx_Mode_Config();       
  94. }

  96. /*********************************************END OF FILE**********************/
復(fù)制代碼

PwmOutput.zip

2.27 KB, 下載次數(shù): 3, 下載積分: 黑幣 -5

作者: admin    時(shí)間: 2019-7-20 03:14
本帖需要重新編輯補(bǔ)全電路原理圖,源碼,詳細(xì)說明與圖片即可獲得100+黑幣(帖子下方有編輯按鈕)



歡迎光臨 (http://m.raoushi.com/bbs/) Powered by Discuz! X3.1