STM32定时器控制方波.docx

/* |/ - - / ( )+-oOOo-(_)-oOOo-+| 奋斗版STM32开发板试验程序 | TIM1-PWM实验 | Sun68 | 2009.12.8 | 演示通过示波器观察TIM1的1通道的PWM波形 | 奋斗STM32嵌入式开发工作室 | http:/OutSTM.5 | | QQ: 9191274 | Oooo |+-oooO-( )-+ ( ) ) / ( (_/ _) */*引脚A0、A1、A3*/* Includes -*/#include stm32f10x.h#include stm32f10x_tim.h#include stm32f10x_rcc.h#include stm32f10x_flash.h#include stm32f10x_gpio.h#include misc.h/* Private typedef -*/* Private define -*/* Private macro -*/* Private variables -*/ TIM_TimeBaseInitTypeDef TIM2_TimeBaseStructure;TIM_TimeBaseInitTypeDef TIM3_TimeBaseStructure;TIM_OCInitTypeDef TIM2_OCInitStructure;TIM_BDTRInitTypeDef TIM2_BDTRInitStructure;TIM_OCInitTypeDef TIM3_OCInitStructure;TIM_BDTRInitTypeDef TIM3_BDTRInitStructure;NVIC_InitTypeDef NVIC_InitStructure;u16 capture = 0;u16 CCR1_Val = 20 * 200 / 100;u16 CCR2_Val = 320 * 200 / 1000;u16 CCR3_Val = 20 * 200 / 100;ErrorStatus HSEStartUpStatus; /* Private function prototypes -*/void RCC_Configuration(void);void GPIO_Configuration(void);void NVIC_Configuration(void);void TIM2_Config(u16 T);void TIM2_Configuration(u16 T);void TIM3_Configuration(void); /* Private functions -*/* Function Name : main* Description : Main program* Input : None* Output : None* Return : None*/int main(void)#ifdef DEBUG debug();#endif /时钟设置 RCC_Configuration(); /GPIO设置 GPIO_Configuration(); /中断设置 NVIC_Configuration(); TIM2_Config(5);/设置定时器 /TIM3_Configuration(); while(1) /* Function Name : RCC_Configuration* Description : Configures the different system clocks.* Input : None* Output : None* Return : None*/void RCC_Configuration(void) /* RCC system reset(for debug purpose) */ RCC_DeInit(); /* Enable HSE */ RCC_HSEConfig(RCC_HSE_ON); /* Wait till HSE is ready */ HSEStartUpStatus = RCC_WaitForHSEStartUp(); if(HSEStartUpStatus = SUCCESS) /* HCLK = SYSCLK */ RCC_HCLKConfig(RCC_SYSCLK_Div1); /* PCLK2 = HCLK */ RCC_PCLK2Config(RCC_HCLK_Div1); /* PCLK1 = HCLK/2 */ RCC_PCLK1Config(RCC_HCLK_Div2); /* Flash 2 wait state */ FLASH_SetLatency(FLASH_Latency_2); /* Enable Prefetch Buffer */ FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); /* PLLCLK = 8MHz * 9 = 72 MHz */ RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9); /* Enable PLL */ RCC_PLLCmd(ENABLE); /* Wait till PLL is ready */ while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) = RESET) /* Select PLL as system clock source */ RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); /* Wait till PLL is used as system clock source */ while(RCC_GetSYSCLKSource() != 0x08) /* TIM2、TIM3, GPIOA and GPIOB clock enable */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2|RCC_APB1Periph_TIM3, ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOA, ENABLE);/* Function Name : GPIO_Configuration* Description : Configure the TIM1 Pins.* Input : None* Output : None* Return : None*/void GPIO_Configuration(void) GPIO_InitTypeDef GPIO_InitStructure; GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3|GPIO_FullRemap_TIM2, ENABLE);GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_4|GPIO_Pin_1|GPIO_Pin_0|GPIO_Pin_3|GPIO_Pin_10|GPIO_Pin_11|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;GPIO_Init(GPIOB,&GPIO_InitStructure);GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_4|GPIO_Pin_1|GPIO_Pin_0|GPIO_Pin_3|GPIO_Pin_10|GPIO_Pin_11|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_15; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;GPIO_Init(GPIOA,&GPIO_InitStructure);/* Function Name : NVIC_Configuration* Description : Configure the nested vectored interrupt controller.* Input : None* Output : None* Return : None*/void NVIC_Configuration(void) #ifdef VECT_TAB_RAM /* Set the Vector Table base location at 0x20000000 */ NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0); #else /* VECT_TAB_FLASH */ /* Set the Vector Table base location at 0x08000000 */ NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0); #endifNVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);/指定中断源NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;/ 抢占式优先级别 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;/指定响应优先级别NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;NVIC_Init(&NVIC_InitStructure);void TIM2_Config(u16 T)if(T = 5)TIM2_Configuration(5); /周期为5毫秒else if(T = 10)TIM2_Configuration(10);/周期为十毫秒else if(T = 20)TIM2_Configuration(20);/周期为20毫秒void TIM2_Configuration(u16 T) TIM_DeInit(TIM2);/将外设TIM2寄存器重设为缺省值 TIM_InternalClockConfig(TIM2); /设置TIM2内部时钟 /* Time Base configuration */ TIM2_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;/时间分割值 TIM2_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;/定时器模式 向上计数/设置周期 if(T = 5) TIM2_TimeBaseStructure.TIM_Prescaler = 1799; TIM2_TimeBaseStructure.TIM_Period = 199;else if(T = 10)TIM2_TimeBaseStructure.TIM_Prescaler = 3599; TIM2_TimeBaseStructure.TIM_Period = 199;else if(T = 20)TIM2_TimeBaseStructure.TIM_Prescaler = 7199; TIM2_TimeBaseStructure.TIM_Period = 199; TIM_TimeBaseInit(TIM2,&TIM2_TimeBaseStructure); /初始化定时器TIM_ClearFlag(TIM2, TIM_FLAG_Update);/清除TIM2的待处理标志位TIM_Cmd(TIM2,ENABLE); /打开定时器 /* Channel 1, 2,3 and 4 Configuration in PWM mode */TIM_OCStructInit(&TIM2_OCInitStructure);/设置缺省值 TIM2_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;/设置PWM模式2输出 /使能输出状态 TIM2_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM2_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; /TIM输出比较极性高 TIM2_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; TIM2_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; TIM2_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; TIM2_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset; /设置占空比if(T = 5)TIM2_OCInitStructure.TIM_Pulse = CCR1_Val;else if(T = 10)TIM2_OCInitStructure.TIM_Pulse = CCR2_Val;else if(T = 20)TIM2_OCInitStructure.TIM_Pulse = CCR3_Val; /TIM2的CH2输出TIM_OC2Init(TIM2, &TIM2_OCInitStructure);TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable); if(T = 5)TIM2_OCInitStructure.TIM_Pulse = CCR1_Val;else if(T = 10)TIM2_OCInitStructure.TIM_Pulse = CCR2_Val;else if(T = 20)TIM2_OCInitStructure.TIM_Pulse = CCR3_Val; TIM_OC1Init(TIM2, &TIM2_OCInitStructure);TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable); if(T = 5)TIM2_OCInitStructure.TIM_Pulse = CCR1_Val;else if(T = 10)TIM2_OCInitStructure.TIM_Pulse = CCR2_Val;else if(T = 20)TIM2_OCInitStructure.TIM_Pulse = CCR3_Val; TIM_OC3Init(TIM2, &TIM2_OCInitStructure);TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Enable); if(T = 5)TIM2_OCInitStructure.TIM_Pulse = CCR1_Val;else if(T = 10)TIM2_OCInitStructure.TIM_Pulse = CCR2_Val;else if(T = 20)TIM2_OCInitStructure.TIM_Pulse = CCR3_Val; TIM_OC4Init(TIM2, &TIM2_OCInitStructure);TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Enable); TIM_CtrlPWMOutputs(TIM2,ENABLE);TIM_ARRPreloadConfig(TIM2, ENABLE);void TIM3_Configuration(void)TIM_DeInit(TIM3);TIM_InternalClockConfig(TIM2);/ Time Base configuration TIM3_TimeBaseStructure.TIM_Prescaler = 7199;TIM3_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;TIM3_TimeBaseStructure.TIM_Period = 199;TIM3_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;TIM3_TimeBaseStructure.TIM_RepetitionCounter = 0x0;TIM_TimeBaseInit(TIM3,&TIM2_TimeBaseStructure);TIM_ClearFlag(TIM3, TIM_FLAG_Update); TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE); / Channel 1, 2,3 and 4 Configuration in PWM mode TIM3_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; TIM3_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM3_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; TIM3_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM3_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low; TIM3_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;TIM3_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset; TIM3_OCInitStructure.TIM_Pulse = CCR3_Val; TIM_OC1Init(TIM3,&TIM3_OCInitStructure); TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Disable);TIM3_OCInitStructure.TIM_Pulse = CCR3_Val;TIM_OC2Init(TIM3,&TIM3_OCInitStructure);TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);TIM3_OCIn