用STM32定時(shí)器控制步進(jìn)電機(jī)實(shí)現(xiàn)頻率任意調(diào)節(jié)

//定時(shí)器1初始化 可調(diào)節(jié)頻率/////////

//輸入?yún)?shù)PWM1_Val掌控頻率參數(shù)//

//////////////////////////////////////////

void TIM1_PWM(unsigned int PWM1_Val)

{

vu16 tim1_Val = PWM1_Val;

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

TIM_OCInitTypeDef TIM_OCInitStructure;

GPIO_InitTypeDef GPIO_InitStructure;

 

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_TIM1 , ENABLE); //RCC_APB2Periph_AFIO

 

TIM_TimeBaseStructure.TIM_Period = tim1_Val;//TIM_Period=65535，計(jì)數(shù)器向上計(jì)數(shù)到65535后產(chǎn)生更新事件，計(jì)數(shù)值歸零

TIM_TimeBaseStructure.TIM_Prescaler = 2; //設(shè)置預(yù)分頻器分頻系數(shù)0

TIM_TimeBaseStructure.TIM_ClockDivision = 0;//設(shè)置了時(shí)鐘分割

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//選擇向上計(jì)數(shù)

TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;

 

TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);//根據(jù)TIM_TimeBaseInitStruct中指定的參數(shù)初始化TIMx

 

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2 ;//定時(shí)模式

TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;//輸出使能

//TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;

TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;//TIM輸出比較極性

//TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;//TIM輸出比較極性

//TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;

//TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;

 

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOA, &GPIO_InitStructure);

 

 

TIM_OCInitStructure.TIM_Pulse = tim1_Val*0.5;//比較數(shù)

TIM_OC1Init(TIM1, &TIM_OCInitStructure);//初始化定時(shí)1

//TIM_OC1PreloadConfig(TIM1, ENABLE);//使能或者失能TIMx在ARR上的自動(dòng)裝載寄存器

 

TIM_OCInitStructure.TIM_Pulse = tim1_Val*0.5;

TIM_OC2Init(TIM1, &TIM_OCInitStructure);//初始化定時(shí)1

//TIM_OC2PreloadConfig(TIM1, ENABLE);//使能或者失能TIMx在ARR上的自動(dòng)裝載寄存器

 

TIM_OCInitStructure.TIM_Pulse = tim1_Val*0.5;

TIM_OC3Init(TIM1, &TIM_OCInitStructure);//初始化定時(shí)1

//TIM_OC3PreloadConfig(TIM1, ENABLE);//使能或者失能TIMx在ARR上的自動(dòng)裝載寄存器

 

TIM_OCInitStructure.TIM_Pulse = tim1_Val*0.5;

TIM_OC4Init(TIM1, &TIM_OCInitStructure);//初始化定時(shí)1

//TIM_OC4PreloadConfig(TIM1, ENABLE);//使能或者失能TIMx在ARR上的自動(dòng)裝載寄存器

 

 

TIM_Cmd(TIM1, ENABLE);//使能定時(shí)器

 

TIM_CtrlPWMOutputs(TIM1,ENABLE);

}

 

這個(gè)已經(jīng)在項(xiàng)目中使用而且效果很好，雖然比較簡單但是很實(shí)用，對(duì)于做一般項(xiàng)目基本上都能達(dá)到控制的要求。

 

控制的實(shí)質(zhì)是用高級(jí)定時(shí)器TIM1輸出50%的可調(diào)PWM，實(shí)現(xiàn)通斷電的轉(zhuǎn)換實(shí)現(xiàn)步進(jìn)電機(jī)的控制，最近時(shí)間好緊，沒有時(shí)間去把這個(gè)好好的整理，等這段時(shí)間過去了 ，一定要好好的把這里整理下。