本帖最后由 寞明 于 2016-8-7 08:52 编辑
[mw_shl_code=c,true]void TIM1_PWM_Init(u16 arr2,u16 psc2)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
//NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA|RCC_AHB1Periph_GPIOB, ENABLE); //ê1ÄüGPIOíaéèoíAFIO¸′óÃ1|ÄüÄ£¿éê±Öó
GPIO_PinAFConfig(GPIOA,GPIO_PinSource8,GPIO_AF_TIM1);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource13,GPIO_AF_TIM1);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //¸′óÃíÆíìêä3ö
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);//3õê¼»ˉGPIO
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //¸′óÃíÆíìêä3ö
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);//3õê¼»ˉGPIO
TIM_TimeBaseStructure.TIM_Period = arr2-1; //éèÖÃÔúÏÂò»¸ö¸üDÂê¼t×°èë»î¶ˉμÄ×Ô¶ˉÖØ×°ÔؼÄ′æÆ÷ÖüÆúμÄÖμ
TIM_TimeBaseStructure.TIM_Prescaler =psc2-1; //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_TimeBaseStructure.TIM_RepetitionCounter=0;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //¸ù¾YTIM_TimeBaseInitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉTIMxμÄê±¼ä»ùêyμ¥λ
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //Ñ¡Ôñ¶¨ê±Æ÷Ä£ê½:TIMÂö3å¿í¶èμ÷ÖÆÄ£ê½2
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //±è½Ïêä3öê1Äü
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; //TIM1_OutputN
TIM_OCInitStructure.TIM_Pulse = 1440; //éèÖÃ′y×°èë2¶»ñ±è½Ï¼Ä′æÆ÷μÄÂö3åÖμ
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //êä3ö¼«DÔ:TIMêä3ö±è½Ï¼«DÔ¸ß
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; //êä3ö¼«DÔ:TIMêä3ö±è½Ï¼«DÔ¸ß
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
TIM_OC1Init(TIM1, &TIM_OCInitStructure); //¸ù¾YTIM_OCInitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèTIMx
//siqu/////////////////////////////////////////////////////////////////////////////////////////////////
TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
//bit7~5 = 111,Ôòdeadtime = (32 + (bit4~bit0)* 16*1/fosc)ns = (32+31)*16*1/72000000 = 14us
TIM_BDTRInitStructure.TIM_DeadTime = 40; //Õaàïμ÷ÕûËàÇø′óD¡0-0xff ËàÇø×î′ó14us
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);
TIM_CtrlPWMOutputs(TIM1,ENABLE); //MOE Ö÷êä3öê1Äü
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); //CH1ԤװÔØê1Äü
TIM_ARRPreloadConfig(TIM1, ENABLE); //ê1ÄüTIMxÔúARRéÏμÄԤװÔؼÄ′æÆ÷
TIM_Cmd(TIM1, ENABLE); //ê1ÄüTIM1
}
[/mw_shl_code]从F103的程序移植F407后,波形就变成这个样子了
友情提示: 此问题已得到解决,问题已经关闭,关闭后问题禁止继续编辑,回答。
一周热门 更多>