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可以 用一个定时器的多个 通道 输出 多个 PWM波 void TIM4_PWM_Init(u16 arr,u16 psc) { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); //ê1Äü¶¨ê±Æ÷4ê±Öó RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE); //ê1ÄüGPIOíaéèoíAFIO¸′óÃ1|ÄüÄ￡¿éê±Öó GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; //TIM_CH1 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //¸′óÃíÆíìêä3ö GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOB, &GPIO_InitStructure);//3õê¼»ˉGPIO PB6 //3õê¼»ˉTIM4 TIM_TimeBaseStructure.TIM_Period = arr; //éèÖÃÔúÏÂò»¸ö¸üDÂê¼t×°èë»î¶ˉμÄ×Ô¶ˉÖØ×°ÔؼÄ′æÆ÷ÖüÆúμÄÖμ TIM_TimeBaseStructure.TIM_Prescaler =psc; //éèÖÃóÃà′×÷ÎaTIMxê±ÖóÆμÂê3yêyμÄÔ¤·ÖÆμÖμ TIM_TimeBaseStructure.TIM_ClockDivision = 0; //éèÖÃê±Öó·Ö¸î:TDTS = Tck_tim TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIMÏòéϼÆêyÄ￡ê½ TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure); //¸ù¾YTIM_TimeBaseInitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉTIMxμÄê±¼ä»ùêyμ￥λ //3õê¼»ˉTIM4 Channel2 PWMÄ￡ê½ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //Ñ¡Ôñ¶¨ê±Æ÷Ä￡ê½:TIMÂö3å¿í¶èμ÷ÖÆÄ￡ê½2 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //±è½Ïêä3öê1Äü //TIM_OCInitStructure.TIM_Pulse=300; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //êä3ö¼«DÔ:TIMêä3ö±è½Ï¼«DÔ¸ß TIM_OC1Init(TIM4, &TIM_OCInitStructure); //¸ù¾YTÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèTIM4 OC1 TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable); //ê1ÄüTIM4ÔúCCR2éÏμÄԤװÔؼÄ′æÆ÷ // // TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //±è½Ïêä3öê1Äü // TIM_OCInitStructure.TIM_Pulse=300; // TIM_OC4Init(TIM4, &TIM_OCInitStructure); //¸ù¾YTÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèTIM3 OC2 // TIM_OC4PreloadConfig(TIM4, TIM_OCPreload_Enable); //ê1ÄüTIM4ÔúCCR2éÏμÄԤװÔؼÄ′æÆ÷ // //TIM_CtrlPWMOutputs(TIM4,ENABLE); //TIM_ARRPreloadConfig(TIM4,ENABLE); TIM_Cmd(TIM4, ENABLE); //ê1ÄüTIM4 TIM_SetCompare1(TIM4,35999); } |
