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標(biāo)題: stm32高級(jí)定時(shí)器應(yīng)用—PWM互補(bǔ)輸出帶死區(qū)時(shí)間 [打印本頁(yè)]

作者: 無妨 時(shí)間: 2018-8-30 16:40
標(biāo)題: stm32高級(jí)定時(shí)器應(yīng)用—PWM互補(bǔ)輸出帶死區(qū)時(shí)間
/************高級(jí)定時(shí)器TIM參數(shù)定義，只限TIM1和TIM8************/
// 當(dāng)使用不同的定時(shí)器的時(shí)候，對(duì)應(yīng)的GPIO是不一樣的，這點(diǎn)要注意
// 這里我們使用高級(jí)控制定時(shí)器TIM1

#define          ADVANCE_TIM                TIM1
#define          ADVANCE_TIM_APBxClock_FUN    RCC_APB2PeriphClockCmd
#define          ADVANCE_TIM_CLK             RCC_APB2Periph_TIM1
// PWM 信號(hào)的頻率 F = TIM_CLK/{(ARR+1)*(PSC+1)}
#define          ADVANCE_TIM_PERIOD          (8-1)
#define          ADVANCE_TIM_PSC             (9-1)
#define          ADVANCE_TIM_PULSE          6

#define          ADVANCE_TIM_IRQ             TIM1_UP_IRQn
#define          ADVANCE_TIM_IRQHandler       TIM1_UP_IRQHandler

// TIM1 輸出比較通道
#define          ADVANCE_TIM_CH1_GPIO_CLK    RCC_APB2Periph_GPIOA
#define          ADVANCE_TIM_CH1_PORT       GPIOA
#define          ADVANCE_TIM_CH1_PIN          GPIO_Pin_8

// TIM1 輸出比較通道的互補(bǔ)通道
#define          ADVANCE_TIM_CH1N_GPIO_CLK    RCC_APB2Periph_GPIOB
#define          ADVANCE_TIM_CH1N_PORT       GPIOB
#define          ADVANCE_TIM_CH1N_PIN          GPIO_Pin_13

// TIM1 輸出比較通道的剎車通道
#define          ADVANCE_TIM_BKIN_GPIO_CLK    RCC_APB2Periph_GPIOB
#define          ADVANCE_TIM_BKIN_PORT       GPIOB
#define          ADVANCE_TIM_BKIN_PIN          GPIO_Pin_12
static void ADVANCE_TIM_GPIO_Config(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  // 輸出比較通道 GPIO 初始化
      RCC_APB2PeriphClockCmd(ADVANCE_TIM_CH1_GPIO_CLK, ENABLE);
  GPIO_InitStructure.GPIO_Pin =  ADVANCE_TIM_CH1_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(ADVANCE_TIM_CH1_PORT, &GPIO_InitStructure);

  // 輸出比較通道互補(bǔ)通道 GPIO 初始化
      RCC_APB2PeriphClockCmd(ADVANCE_TIM_CH1N_GPIO_CLK, ENABLE);
  GPIO_InitStructure.GPIO_Pin =  ADVANCE_TIM_CH1N_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(ADVANCE_TIM_CH1N_PORT, &GPIO_InitStructure);

  // 輸出比較通道剎車通道 GPIO 初始化
      RCC_APB2PeriphClockCmd(ADVANCE_TIM_BKIN_GPIO_CLK, ENABLE);
  GPIO_InitStructure.GPIO_Pin =  ADVANCE_TIM_BKIN_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(ADVANCE_TIM_BKIN_PORT, &GPIO_InitStructure);
      // BKIN引腳默認(rèn)先輸出低電平
      GPIO_ResetBits(ADVANCE_TIM_BKIN_PORT,ADVANCE_TIM_BKIN_PIN);
}

///*
// * 注意：TIM_TimeBaseInitTypeDef結(jié)構(gòu)體里面有5個(gè)成員，TIM6和TIM7的寄存器里面只有
// * TIM_Prescaler和TIM_Period，所以使用TIM6和TIM7的時(shí)候只需初始化這兩個(gè)成員即可，
// * 另外三個(gè)成員是通用定時(shí)器和高級(jí)定時(shí)器才有.
// *-----------------------------------------------------------------------------
// *typedef struct
// *{ TIM_Prescaler          都有
// *       TIM_CounterMode                            TIMx,x[6,7]沒有，其他都有
// *  TIM_Period             都有
// *  TIM_ClockDivision       TIMx,x[6,7]沒有，其他都有
// *  TIM_RepetitionCounter TIMx,x[1,8,15,16,17]才有
// *}TIM_TimeBaseInitTypeDef;
// *-----------------------------------------------------------------------------
// */

/* ---------------- PWM信號(hào) 周期和占空比的計(jì)算--------------- */
// ARR ：自動(dòng)重裝載寄存器的值
// CLK_cnt：計(jì)數(shù)器的時(shí)鐘，等于 Fck_int / (psc+1) = 72M/(psc+1)
// PWM 信號(hào)的周期 T = (ARR+1) * (1/CLK_cnt) = (ARR+1)*(PSC+1) / 72M
// 占空比P=CCR/(ARR+1)

static void ADVANCE_TIM_Mode_Config(void)
{
  // 開啟定時(shí)器時(shí)鐘,即內(nèi)部時(shí)鐘CK_INT=72M
      ADVANCE_TIM_APBxClock_FUN(ADVANCE_TIM_CLK,ENABLE);

/*--------------------時(shí)基結(jié)構(gòu)體初始化-------------------------*/
      TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
      // 自動(dòng)重裝載寄存器的值，累計(jì)TIM_Period+1個(gè)頻率后產(chǎn)生一個(gè)更新或者中斷
      TIM_TimeBaseStructure.TIM_Period=ADVANCE_TIM_PERIOD;
      // 驅(qū)動(dòng)CNT計(jì)數(shù)器的時(shí)鐘 = Fck_int/(psc+1)
      TIM_TimeBaseStructure.TIM_Prescaler= ADVANCE_TIM_PSC;
      // 時(shí)鐘分頻因子，配置死區(qū)時(shí)間時(shí)需要用到
      TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
      // 計(jì)數(shù)器計(jì)數(shù)模式，設(shè)置為向上計(jì)數(shù)
      TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
      // 重復(fù)計(jì)數(shù)器的值，沒用到不用管
      TIM_TimeBaseStructure.TIM_RepetitionCounter=0;
      // 初始化定時(shí)器
      TIM_TimeBaseInit(ADVANCE_TIM, &TIM_TimeBaseStructure);

      /*--------------------輸出比較結(jié)構(gòu)體初始化-------------------*/
      TIM_OCInitTypeDef  TIM_OCInitStructure;
      // 配置為PWM模式1
      TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
      // 輸出使能
      TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
      // 互補(bǔ)輸出使能
      TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
      // 設(shè)置占空比大小
      TIM_OCInitStructure.TIM_Pulse = ADVANCE_TIM_PULSE;
      // 輸出通道電平極性配置
      TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
      // 互補(bǔ)輸出通道電平極性配置
      TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
      // 輸出通道空閑電平極性配置
      TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
      // 互補(bǔ)輸出通道空閑電平極性配置
      TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
      TIM_OC1Init(ADVANCE_TIM, &TIM_OCInitStructure);
      TIM_OC1PreloadConfig(ADVANCE_TIM, TIM_OCPreload_Enable);

      /*-------------------剎車和死區(qū)結(jié)構(gòu)體初始化-------------------*/
      // 有關(guān)剎車和死區(qū)結(jié)構(gòu)體的成員具體可參考BDTR寄存器的描述
      TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
  TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
  TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
  TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1;
      // 輸出比較信號(hào)死區(qū)時(shí)間配置，具體如何計(jì)算可參考 BDTR:UTG[7:0]的描述
      // 這里配置的死區(qū)時(shí)間為152ns
  TIM_BDTRInitStructure.TIM_DeadTime = 11;
  TIM_BDTRInitStructure.TIM_Break = TIM_Break_Enable;
      // 當(dāng)BKIN引腳檢測(cè)到高電平的時(shí)候，輸出比較信號(hào)被禁止，就好像是剎車一樣
  TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
  TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
  TIM_BDTRConfig(ADVANCE_TIM, &TIM_BDTRInitStructure);

      // 使能計(jì)數(shù)器
      TIM_Cmd(ADVANCE_TIM, ENABLE);
      // 主輸出使能，當(dāng)使用的是通用定時(shí)器時(shí)，這句不需要
      TIM_CtrlPWMOutputs(ADVANCE_TIM, ENABLE);
}

void ADVANCE_TIM_Init(void)
{
      ADVANCE_TIM_GPIO_Config();
      ADVANCE_TIM_Mode_Config();
}

/*********************************************END OF FILE**********************/

作者: admin 時(shí)間: 2018-8-30 16:49
工程包能分享嗎？

作者: 春風(fēng)十里吹 時(shí)間: 2019-6-8 22:06
這都很好了，做人不能太貪！要真想別人的成果有時(shí)還真有請(qǐng)別人吃過飯的！

作者: lanmanck 時(shí)間: 2020-3-12 16:35
死區(qū)占的高電平時(shí)間還是低電平時(shí)間？

作者: FFF阿貍 時(shí)間: 2020-8-18 10:07

lanmanck 發(fā)表于 2020-3-12 16:35
死區(qū)占的高電平時(shí)間還是低電平時(shí)間？

他有一個(gè)比較觸發(fā)的，基本上頻率不變的

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