TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure; //¶¨ÒåÒ»¸öÉèÖö¨Ê±Æ÷µÄ±äÁ¿ NVIC_InitTypeDef NVIC_InitStructure;
时间: 2024-06-05 08:08:57 浏览: 70
这是一段代码,使用了STM32的标准库,其中定义了两个结构体变量TIM_TimeBaseInitStructure和NVIC_InitStructure,分别用于设置定时器和中断控制器。TIM_TimeBaseInitStructure用于设置定时器的时钟源、预分频系数、计数器模式、计数器周期等参数;NVIC_InitStructure用于设置中断优先级、中断线路等参数。这些参数的具体设置可以根据实际需求进行调整。
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void PWM_Int(u16 arr,u16 psc) { GPIO_InitTypeDef GPIO_InitStructure; //¶¨Òå½á¹¹ÌåGPIO_InitStructure TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; //¶¨Òå½á¹¹ÌåTIM_TimeBaseStructure TIM_OCInitTypeDef TIM_OCInitStructure; //¶¨Òå½á¹¹ÌåTIM_OCInitStructure RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);//ʹÄÜPB¶Ë¿ÚʱÖÓ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);//ʹÄܶ¨Ê±Æ÷3 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //¸´ÓÃģʽÊä³ö GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1; //PB0 ¡¢PB1 GPIO_InitStructure.GPIO_Speed= GPIO_Speed_50MHz; //IO¿ÚËÙ¶È GPIO_Init(GPIOB,&GPIO_InitStructure); //GPIO³õʼ»¯ TIM_TimeBaseStructure.TIM_Period = arr; //ÉèÖÃÏÂÒ»¸ö¸üлµÄ×Ô¶¯ÖØ×°ÔؼĴæÆ÷µÄÖµ TIM_TimeBaseStructure.TIM_Prescaler = psc; //Ô¤·ÖÅäÖµ TIM_TimeBaseStructure.TIM_ClockDivision = 0; //ʱÖÓ·Ö¸î TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //ÏòÉϼÆÊý TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure); TIM_OCInitStructure.TIM_OCMode= TIM_OCMode_PWM1; //PWMÂö³å¿í¶Èµ÷ÖÆ1 TIM_OCInitStructure.TIM_Pulse = 0; //ÉèÖôý×°È벶»ñ±È½Ï¼Ä´æÆ÷µÄÂö³åÖµ TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //ÉèÖÃTIMÊä³ö¼«ÐÔΪ¸ß TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;//±È½ÏÊä³öʹÄÜ TIM_OC3Init(TIM3,&TIM_OCInitStructure); TIM_OC4Init(TIM3,&TIM_OCInitStructure); TIM_CtrlPWMOutputs(TIM3,ENABLE);//Ö÷Êä³öʹÄÜ TIM_OC3PreloadConfig(TIM3,TIM_OCPreload_Enable); TIM_OC4PreloadConfig(TIM3,TIM_OCPreload_Enable);//ʹÄÜԤװÔؼĴæÆ÷ TIM_ARRPreloadConfig(TIM3,ENABLE); //ʹÄÜ×Ô¶¯×°ÔØÔÊÐíλ TIM_Cmd(TIM3,ENABLE);//Æô¶¯¶¨Ê±Æ÷3 } void Set_PWMA(int PWM) { TIM_SetCompare3(TIM3,PWM);//ÉèÖÃTIM3ͨµÀ3µÄÕ¼¿Õ±È 3000/7200 } void Set_PWMB(int PWM) { TIM_SetCompare4(TIM3,PWM); 这段代码是一个pwm驱动还是两个pwm驱动欸
这段代码是一个具有两个PWM通道的驱动程序。使用了TIM3定时器和GPIOB引脚的PB0和PB1作为输出。其中,函数`void PWM_Int(u16 arr, u16 psc)`用于初始化PWM的定时器和GPIO引脚,设置PWM的周期和预分频值。而函数`void Set_PWMA(int PWM)`和`void Set_PWMB(int PWM)`则用于设置PWM的占空比,即设置TIM3通道3和通道4的输出值。
void Delay_Init(void) { TIM_TimeBaseInitTypeDef TIM_7; NVIC_InitTypeDef TIM7_UPIT; //¿ªÆôTIM6ΪÏòÉϼÆÊý£¬ÒòΪ¶¨Ê±Æ÷ʱÖÓ»áÓб¶Æµ£¬Æä¹ÒÔÚAPB1 42MHZÉÏ£¬µ«ÊÇÆä´óСΪ84MHZ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM7,ENABLE); TIM_7.TIM_ClockDivision=TIM_CKD_DIV1; TIM_7.TIM_CounterMode=TIM_CounterMode_Up; TIM_7.TIM_Period=19999;//É趨ʱ¼äΪ2ms TIM_7.TIM_Prescaler=83; TIM_7.TIM_RepetitionCounter=0; TIM_TimeBaseInit(TIM7,&TIM_7); TIM_Cmd(TIM7,ENABLE); //¿ªÆôTIM6ÏàÓ¦Öжϣ¬ÉèÖÃÇÀÕ¼ÓÅÏȼ¶Îª×î¸ß£¬ÏìÓ¦ÓÅÏȼ¶Í¬Ñù NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); TIM7_UPIT.NVIC_IRQChannel=TIM7_IRQn; TIM7_UPIT.NVIC_IRQChannelCmd=ENABLE; TIM7_UPIT.NVIC_IRQChannelPreemptionPriority=0; TIM7_UPIT.NVIC_IRQChannelSubPriority=0; NVIC_Init(&TIM7_UPIT); TIM_ITConfig(TIM7,TIM_IT_Update,ENABLE); }
这段代码是用来初始化TIM7定时器的,它的时钟频率为APB1的一半(即42MHz),预分频器为83,所以计数器每计数一次需要的时间为2us。定时器的计数模式为向上计数,计数到19999时产生中断,中断优先级为最高,中断服务函数为TIM7_IRQHandler。这段代码还开启了TIM7定时器和TIM7中断。
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