STM32一定时器产生不同频率的PWM.doc

STM32PWM2011-05-05 12:07? ? STM32PWM1RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);2GPIO/* PA2,3,4,5,6-Key_Up,Key_Down,Key_Left,Key_Right,Key_Ctrl */GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; /GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; /50MGPIO_Init(GPIOA, &GPIO_InitStructure);/* PA7PWM, */GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;?GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; /50MGPIO_Init(GPIOA, &GPIO_InitStructure);3PWMPWMTIM_Configuration()TIM_Cmd(TIM3,ENABLE);/* TIM1 Main Output Enable */TIM_CtrlPWMOutputs(TIM1,ENABLE);PWM? PWMPWM ? ? I/OPWMTIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Disable); if (TIM_GetITStatus(TIM3, TIM_IT_CC2) != RESET)? ? ? ? TIM_ClearITPendingBit(TIM3, TIM_IT_CC2);? capture = TIM_GetCapture2(TIM3);? ? TIM_SetCompare2(TIM3, capture + Key_Value);vu16 CCR1_Val = 32768;vu16 CCR2_Val = 16384;vu16 CCR3_Val = 8192;vu16 CCR4_Val = 4096;void TIM_Configuration(void)TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;TIM_OCInitTypeDef TIM_OCInitStructure;/* TIM2 clock enable */RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);/* -TIM2 Configuration: Output Compare Toggle Mode:TIM2CLK = 36 MHz, Prescaler = 0x2, TIM2 counter clock = 12 MHzCC1 update rate = TIM2 counter clock / CCR1_Val = 366.2 HzCC2 update rate = TIM2 counter clock / CCR2_Val = 732.4 HzCC3 update rate = TIM2 counter clock / CCR3_Val = 1464.8 HzCC4 update rate = TIM2 counter clock / CCR4_Val = 2929.6 Hz- */* Time base configuration */TIM_TimeBaseStructure.TIM_Period = 65535;? ? ? ?TIM_TimeBaseStructure.TIM_Prescaler = 2;? ? ?TIM_TimeBaseStructure.TIM_ClockDivision = 0;?TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);/* Channel 1 Configuration in PWM mode */TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;? ? ? /PWM2TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; /TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;/TIM_OCInitStructure.TIM_Pulse = CCR1_Val;? ? ? ? /TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;? ? /TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;? ? /TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;TIM_OC1Init(TIM2,&TIM_OCInitStructure);? ? ? ? /1TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Disable);TIM_OCInitStructure.TIM_Pulse = CCR2_Val;? ? ? ? /TIM_OC2Init(TIM2,&TIM_OCInitStructure);? ? ? ? /2TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Disable);TIM_OCInitStructure.TIM_Pulse = CCR3_Val;? ? ? ? /TIM_OC3Init(TIM2,&TIM_OCInitStructure);? ? ? ? /3TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Disable);TIM_OCInitStructure.TIM_Pulse = CCR4_Val;? ? ? ? /TIM_OC4Init(TIM2,&TIM_OCInitStructure);? ? ? ? /4TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Disable);/* TIM2 counter enable */TIM_Cmd(TIM2,ENABLE);/* TIM2 Main Output Enable */TIM_CtrlPWMOutputs(TIM2,ENABLE);? /* TIM IT enable */TIM_ITConfig(TIM2, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4, ENABLE);void GPIO_Configuration(void)GPIO_InitTypeDef GPIO_InitStructure;/*CLOCK,GPIO.STM32,STM32,*/RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);/* PA2,3,4,5,6,7-LED1,LED2,LED3,LED4,LED5,LED6 */GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD; /GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; /50MGPIO_Init(GPIOA, &GPIO_InitStructure);/* PB0,1-LED7,LED8*/GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD; /GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; /50MGPIO_Init(GPIOB, &GPIO_InitStructure);/* PA0,1-KEY_LEFT,KEY_RIGHT*/GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;? /GPIO_Init(GPIOA, &GPIO_InitStructure);/* PC13-KEY_UP*/GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;? /GPIO_Init(GPIOC, &GPIO_InitStructure);/* PB5-KEY_DOWN*/GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;? /GPIO_Init(GPIOB, &GPIO_InitStructure);/* GPIOA Configuration:TIM2 Channel1, 2, 3 and 4 in Output */GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_Init(GPIOA, &GPIO_InitStructure);void NVIC_Configuration(void)NVIC_InitTypeDef NVIC_InitStructure;/* Configure one bit for preemption priority */NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);NVIC_InitStructure.NVIC_IRQChannel=TIM2_IRQn;NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;NVIC_Init(&NVIC_InitStructure);u16 capture = 0;extern vu16 CCR1_Val;extern vu16 CCR2_Val;extern vu16 CCR3_Val;extern vu16 CCR4_Val;void TIM2_IRQHandler(void)/* TIM2_CH1 toggling with frequency = 183.1 Hz */if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)? ? TIM_ClearITPendingBit(TIM2, TIM_IT_CC1 );capture = TIM_GetCapture1(TIM2);TIM_SetCompare1(TIM2, capture + CCR1_Val );/* TIM2_CH2 toggling with frequency = 366.2 Hz */if (TIM_GetITStatus(TIM2, TIM_IT_CC2) != RESET)? ? TIM_ClearITPendingBit(TIM2, TIM_IT_CC2);capture = TIM_GetCapture2(TIM2);? ? TIM_SetCompare2(TIM2, capture + CCR2_Val);/* TIM2_CH3 toggling with frequency = 732.4 Hz */if (TIM_GetITStatus(TIM2, TIM_IT_CC3) != RESET)? ? TIM_ClearITPendingBit(TIM2, TIM_IT_CC3);capture = TIM_GetCapture3(TIM2);? ? TIM_SetCompare3(TIM2, capture + CCR3_Val);/* TIM2_CH4 toggling with frequency = 1464.8 Hz */if (TIM_GetITStatus(TIM2, TIM_IT_CC4) != RESET)? ? TIM_ClearITPendingBit(TIM2, TIM_IT_CC4);capture = TIM_GetCapture4(TIM2);? ? TIM_SetCompare4(TIM2, capture + CCR4_Val);#include stm32libstm32f10x.h#include hal.hvolatile u16 Key_Value=1000;? /PWMint main(void)ChipHalInit();ChipOutHalInit();while(1)? if( (!Get_Key_Up)&(!Get_Key_Down)&(!Get_Key_Left)&(!Get_Key_Right)&(!Get_Key_Ctrl) )? ? ? Key_Value=12000;? ? else? ? ? if(Get_Key_Up)? ? / ,1kHz? ? ? ? Key_Value=6000;? ? ? ? else if(Get_Key_Down)? / ,2kHz? ? ? ? ? Key_Value=3000;? ? ? ? Delay_Ms(20);? ? ? /10ms? ? if(Get_Key_Left)? ? /,3kHz? ? ? ? Key_Value=2000;? ? ? ? else if(Get_Key_Right) /,4kHz? ? ? ? ? Key_Value=1500;? ? ? ? Delay_Ms(20);? ? ? /10ms? ? if(Get_Key_Ctrl)? ? /,5kHz? ? ? ? ? Key_Value=1200;? ? ? ? Delay_Ms(20);? ? ? /10ms? extern volatile u16 Key_Value;u16 capture=0;void TIM3_IRQHandler(void)/* TIM2_CH2 toggling with frequency = 366.2 Hz */if (TIM_GetITStatus(TIM3, TIM_IT_CC2) != RESET)? ? TIM_ClearITPendingBit(TIM3, TIM_IT_CC2);capture = TIM_GetCapture2(TIM3);? ? TIM_SetCompare2(TIM3, capture + Key_Value);void TIM3_Configuration(void)TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;TIM_OCInitTypeDef TIM_OCInitStructure;/* TIM2 clock enable */RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);/*TIM1*/TIM_TimeBaseStructure.TIM_Prescaler = 5;? ? ? /()72M/6=12MTIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;? /TIM_TimeBaseStructure.TIM_Period = 65535;? ? ? ? /TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0;TIM_TimeBaseIni