stm32f030 pwm驱动

/** ***************************************************************************** *文件： pwm.c *作者： binfran *时间： 2015.05.10 *描述： 产生200KHZ的PWM和按键音 *版本： V1.0 *其他： ***************************************************************************** */ #include "pwm.h" void Pwm200KHGpioConfig(void) //产生200KH的引脚配置 PA4 TIM14 CH1 { GPIO_InitTypeDef io; RCC_AHBPeriphClockCmd(Pwm200KHz_RCC_AHB, ENABLE); io.GPIO_Mode=GPIO_Mode_AF; io.GPIO_Speed=GPIO_Speed_50MHz; io.GPIO_OType=GPIO_OType_PP; io.GPIO_PuPd=GPIO_PuPd_UP; io.GPIO_Pin=Pwm200KHz_GPIO_PIN; GPIO_Init(Pwm200KHz_GPIO, &io); GPIO_PinAFConfig(Pwm200KHz_GPIO,Pwm200KHz_GPIO_PinSource,Pwm200KHz_GPIO_AF); } //void Pwm200KHModeConfig(void) //产生200KH的定时器配置 PA4 TIM14 CH1 //入口参数，主晶振分频(需大于0)，要产生的HZ频率 void Pwm200KHModeConfig(UINT16 prescaler, UINT32 HZ) //产生200KH的定时器配置 PA4 TIM14 CH1 { /* ----------------------------------------------------------------------- TIM14 Configuration: generate 4 PWM signals with 4 different duty cycles: TIM14CLK = 48 MHz, Prescaler = 0x0, TIM14 counter clock = 48 MHz TIM14 ARR Register = 239 => TIM14 Frequency = TIM14 counter clock/(ARR + 1) TIM14 Frequency = 200 KHz. TIM14 Channel1 duty cycle = (TIM14_CCR1/ TIM14_ARR)* 100 = 50% TIM14 Channel2 duty cycle = (TIM14_CCR2/ TIM14_ARR)* 100 = 37.5% TIM14 Channel3 duty cycle = (TIM14_CCR3/ TIM14_ARR)* 100 = 25% TIM14 Channel4 duty cycle = (TIM14_CCR4/ TIM14_ARR)* 100 = 12.5% ----------------------------------------------------------------------- */ TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; UINT16 timerPeriod=0; UINT32 timerPulse=0; timerPeriod=((SystemCoreClock/prescaler)/HZ); /*PWM信号电平跳变值*/ timerPulse = timerPeriod/2; //一半的占空比 /* PWM信号电平跳变值 */ // UINT16 CCR1_Val = 120; //一半的占空比 //UINT16 CCR2_Val = 45; //37.5% //UINT16 CCR3_Val = 30; //25% //UINT16 CCR4_Val = 15; //12.5% RCC_APB1PeriphClockCmd(Pwm200kHZ_RCC_APB, ENABLE); /* Time base configuration */ TIM_TimeBaseStructure.TIM_Period = timerPeriod-1; //当定时器从0计数到239，即为240次，为一个定时周期 TIM_TimeBaseStructure.TIM_Prescaler = prescaler-1; // // TIM_TimeBaseStructure.TIM_Period = 239; //当定时器从0计数到239，即为240次，为一个定时周期 // TIM_TimeBaseStructure.TIM_Prescaler = 0; //设置预分频：不预分频，即为48MHz TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1 ; //设置时钟分频系数：不分频 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数模式 TIM_TimeBaseInit(TIM14, &TIM_TimeBaseStructure); /* PWM1 Mode configuration: Channel1 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //配置为PWM模式1 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = timerPulse; // // TIM_OCInitStructure.TIM_Pulse = CCR1_Val; //设置跳变值，当计数器计数到这个值时，电平发生跳变 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //当定时器计数值小于CCR1_Val时为高电平 TIM_OC1Init(Pwm200KHz_TIM, &TIM_OCInitStructure); //使能通道1 TIM_OC1PreloadConfig(Pwm200KHz_TIM, TIM_OCPreload_Enable); TIM_ARRPreloadConfig(Pwm200KHz_TIM, ENABLE); // 使能TIM14重载寄存器ARR /* TIM14 enable counter */ //TIM_Cmd(TIM14, ENABLE); //使能定时器14 } void Pwm200KHZ_init(void) { Pwm200KHGpioConfig(); // Pwm200KHModeConfig(); Pwm200KHModeConfig(PWM_CAMERA_PRESCALER,PWM_CAMERA_FREQUENCY); } void KeyToneGpioConfig(void) //产生按键音PWM引脚配置，PA8 TIM1 CH1 { GPIO_InitTypeDef io; RCC_AHBPeriphClockCmd(keyPwmTone_RCC_AHB, ENABLE); io.GPIO_Mode=GPIO_Mode_AF; io.GPIO_Speed=GPIO_Speed_50MHz; io.GPIO_OType=GPIO_OType_PP; io.GPIO_PuPd=GPIO_PuPd_UP; io.GPIO_Pin=keyPwmTone_GPIO_PIN; GPIO_Init(keyPwmTone_GPIO, &io); GPIO_PinAFConfig(keyPwmTone_GPIO,keyPwmTone_GPIO_PinSource,keyPwmTone_GPIO_AF); } //入口参数，主晶振分频(需大于0)，要产生的HZ频率 void KeyTonePwmModeConfig(UINT16 prescaler, UINT16 HZ) //产生按键音PWM引脚配置，PA8 TIM1 CH1 { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; UINT16 timerPeriod=0; UINT32 timerPulse=0; timerPeriod=((SystemCoreClock/prescaler)/HZ); /*PWM信号电平跳变值*/ timerPulse = timerPeriod/2; //一半的占空比 RCC_APB2PeriphClockCmd(keyPwmTone_RCC_APB, ENABLE); /* Time base configuration */ TIM_TimeBaseStructure.TIM_Period = timerPeriod-1; //当定时器从0计数到239，即为240次，为一个定时周期 TIM_TimeBaseStructure.TIM_Prescaler = prescaler-1; // TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1 ; // TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; // TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); /* PWM1 Mode configuration: Channel1 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; // TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; // TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset; TIM_OCInitStructure.TIM_Pulse = timerPulse; // TIM_OC1Init(keyPwmTone_TIM, &TIM_OCInitStructure); // TIM_CtrlPWMOutputs(keyPwmTone_TIM,ENABLE); } void KeyTonePwmInit(void) { KeyToneGpioConfig(); KeyTonePwmModeConfig(2,600); }