FTM2 PWM 输出设置

只看该作者 · 2016-1-26 13:01

本帖最后由 zhangqi123zq 于 2016-1-26 15:04 编辑

您好，新人求助，FTM2 PWM输出设置，独立模式，输出相同。
void FTM2_Init(u16 val,u8 interrupt_EN)
{
FTM_OVERTIME_DISEN_typ interrupt_en;

interrupt_en = (FTM_OVERTIME_DISEN_typ) (interrupt_EN&0x01);
   SIM->SCGC |=0x80;  //¿ªÆôFTM2 Ê±ÖÓ
  //SIM->SOPT|=4000; //FTM2 ×Ô¶¯Í¬²½
//FTM2->POL|=0x20;    //ÏµÍ³Ê±ÖÓ
   FTM2->SC =0X00;    //Çå³ýÅäÖÃ
   FTM2->MOD=val ;    //×î´ó¼ÆÊýÖµ
   FTM2->CNT = 0;    //Çå³ý¼ÆÊýÆ÷
   FTM2->SC&=~0x20;    //ÏòÉÏ¼ÆÊýÄ£Ê½
   FTM2->SC &=~ 0x07; //Ê±ÖÓ²»·ÖÆµ 128
// FTM2->SC|=0x08;    //ÏµÍ³Ê±ÖÓ
   FTM2->SC&=~0x80;  //Çå³ýÖÐ¶Ï±ê¼Ç
if(interrupt_en==FTM_OVERTIME_EN)
{
   FTM2->SC&=~0x80;  //Çå³ýÖÐ¶Ï±ê¼Ç
   FTM2->SC |=0x60; //Ê¹ÄÜÒç³öÖÐ¶Ï
   NVIC_EnableIRQ(FTM2_IRQn); //Ê¹ÄÜÖÐ¶ÏÏß
}
}
void FTM2_PWM_Init(u8 CHannels,u8 CH_SW,u8 interrupt_EN)
{
      u8 i=0;
      FTM_CH_typ    channels;
      FTM2_PWM_SW_typ  CH_sw;
      FTM_CH_EN_typ interrupt_en;

      channels    = (FTM_CH_typ)    (CHannels&0X3F)    ;
  CH_sw       = (FTM2_PWM_SW_typ) (CH_SW&0X3F)       ;
      interrupt_en  = (FTM_CH_EN_typ) (interrupt_EN&0X3F) ;
      for(i=0;i<6;i++)
      {
      if((channels&(0x01<<i))>0)
      {
      if(( FTM2->MODE&0x04)==0)
      {
               if(FTM2->FMS & 0x40)
               {
               FTM2->MODE |= 0x04;

               }
      }

      //É¨ÃèÒý½ÅÇÐ»»-------------------------------------
            switch(i)
            {
               case 2:
                                 if(CH_sw&FTM2_PWM_CH2_PTC4)
                                             {
                                                SIM->PINSEL |=  0x4000;
                                             }
                                             else
                                             {
                                                SIM->PINSEL &=~ 0x4000;
                                             }
                     break;

         case 3:
                                             if(CH_sw&FTM2_PWM_CH3_PTC5)
                                             {
            SIM->PINSEL |=  0x1000;  //FTM2 Í¨µÀ 3  Ó³Éäµ½ PTC5
                                             }
                                             else
                                             {
                                                SIM->PINSEL &=~ 0x1000;  //FTM2 Í¨µÀ 3  Ó³Éäµ½ PTC3
                                             }
                     break;
            }
            //Í¨µÀÅäÖÃ---------------------------------------
         FTM2->CONTROLS.CnSC=0;
         FTM2->CONTROLS.CnSC |= 0x20;  //±ßÔµ¶ÔÆë PWM Ä£Ê½
         FTM2->CONTROLS.CnSC |= 0x08;  // ¸ßµçÆ½ÓÐÐ§
         FTM2->CONTROLS.CnV =1000 ; //PWMÕ¼¿Õ±È

   FTM2->MODE=0x04;
               FTM2->POL|=0x20;
               FTM2->FMS|=0x60;

//ÖÐ¶ÏÅäÖÃ----------------------------------------
            if(interrupt_en&(FTM_CH2_EN<<i))
      {
         FTM2->CONTROLS.CnSC &=~0X80; //Çå³ýÖÐ¶Ï±ê¼Ç
   FTM2->CONTROLS.CnSC |=0X40;    //ÔÊÐíPWM ÖÐ¶Ï
      }
      }
      }
}
void MY_PWM_VAl_SET(FTM_Type *FTMx,u8 CHannels,u16 VAL)
{
   PWM_CH_typ    channels;
   if((FTMx!=FTM0)&&(FTMx!=FTM2))
   {
   return;
   }
   if(FTMx==FTM0)
   {
      channels  = (PWM_CH_typ) (CHannels);
   FTM0->CONTROLS[channels].CnV=VAL;
   }
   else
   {
      channels  = (PWM_CH_typ) (CHannels);
      //
FTM2->CONTROLS[channels].CnV=VAL;
   FTM2->PWMLOAD |= 0x200;  //¿ªÆôÍ¬²½
      //
   }
}
为什么输出FTM2 CH4 与CH5 始终为互补输出。
运行：COMBINE =0；
CSC4=0xA8;
CSC5=0xA8;
SC =0x88;
MOD=0x54c0;
占空比设置30%，CH5 输出30%，CH4 输出70%，互补，为什么？

FTM2 PWM 输出设置

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