STM32-输出PWM波程序.doc

这是main.c 主程序/这是STM32F103ZE的一个模板/在PA8 PB13 产生一个互补的PWM波，频率为10KHz,占空比为1/5#include stm32f10x.hBitAction bbt=0; /定义一个位变量 bbt,并清0u16 i;int main(void) u16 InitValue,Pre_Divide,ZKB; SystemInit(); /系统时钟初始化，调用该函数后，系统时钟为72M，函数原形在system_stm32f10x.c中 GPIO_init();/*TIM1_PWM波1通道设置* InitValue=7200; /初值1000 Pre_Divide=1; /预分频1 ZKB=1200; /占空比 TIM1_PWM_1_init(InitValue,Pre_Divide,ZKB); /TIM1-CCR1=2400; /修改占空比/*while(1) / 这是sysinit.c 系统程序#include stm32f10x.hvoid GPIO_init() GPIO_InitTypeDef GPIO_InitStructure; /声明端口结构，需要放在前面 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB,ENABLE); /开启相应端口时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);/*端口A8,A9,A10是TIM1_PWM波的输出端* GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; /PWM波设为复用推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; /端口频率可设为2，10，50 GPIO_Init(GPIOA, &GPIO_InitStructure); /启动A端口/*/*端口B13,B14,B15是TIM1_PWM波的互补输出端* GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15; GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; /端口频率可设为2，10，50 GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP; /PWM波的复用推挽输出 GPIO_Init(GPIOB,&GPIO_InitStructure); /启动B端口/*/*TIM1_PWM波1通道初始化*void TIM1_PWM_1_init(u16 InitValue, u16 Pre_Divide, u16 CCR1_Val) TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; TIM_BDTRInitTypeDef TIM_BDTRInitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); TIM_TimeBaseStructure.TIM_Period =InitValue; TIM_TimeBaseStructure.TIM_Prescaler =Pre_Divide-1; TIM_TimeBaseStructure.TIM_ClockDivision = 0; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Down; TIM_TimeBaseStructure.TIM_RepetitionCounter=0; TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); TIM_ARRPreloadConfig(TIM1,ENABLE); /使能TIM1在ARR上的预装载寄存器 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;/ 选择定时器模式 TIM脉冲宽度调制模式1 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; /选择输出比较状态 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;/选择互补输出比较状态 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; /选择输出极性 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; /选择互补输出极性 TIM_OCInitStructure.TIM_Pulse = CCR1_Val; /设置待装入捕获比较寄存器的脉冲值 TIM_OC1Init(TIM1, &TIM_OCInitStructure);/捕获比较匹配器结构1通道赋值 TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable); /使能TIM1在CCR1上的预装载寄存器/死区设置 TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;/TIM1_OSSRState设置在运行模式下非工作状态选项 TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;/TIM1_OSSIState设置在空闲模式下非工作状态选项(使能TIM1 OSSI状态) TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF; /TIM1_LOCKLevel设置了锁电平参数(不锁任何位) TIM_BDTRInitStructure.TIM_DeadTime = 0x90; /这里调整死区大小0-0xff,TIM1_DeadTIM1指定了输出打开和关闭状态之间的延时 TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable; /TIM1_Break使能或者失能TIM1刹车输入(失能TIM1刹车输入) TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;/TIM1_BreakPolarity设置TIM1刹车输入管脚极性（TIM1刹车输入管脚极性高） TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;/TIM1_AutomaticOutput使能或者失能自动输出功能（自动输出功能使能） TIM_BDTRConfig(