STM32 输出PWM波程序
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.h"
BitAction bbt=0; //定义一个位变量bbt,并清0
u16 i;
int main(void)
{
u16 InitV alue,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****************************************************************
InitV alue=7200; //初值1000
Pre_Divide=1; //预分频1
ZKB=1200; //占空比
TIM1_PWM_1_init(InitV alue,Pre_Divide,ZKB);
//TIM1->CCR1=2400; //修改占空比
//***************************************************************************** *********
while(1)
{
//
}
}
这是sysinit.c 系统程序
#include "stm32f10x.h"
void 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 InitV alue, u16 Pre_Divide, u16 CCR1_V al)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
TIM_TimeBaseStructure.TIM_Period =InitV alue;
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_V al;//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(TIM1, &TIM_BDTRInitStructure);//(设置刹车特性，死区时间，锁电平，OSSI，OSSR状态和AOE（自动输出使能）)
TIM_Cmd(TIM1, ENABLE); //使能或者失能指定的TIM1
TIM_CtrlPWMOutputs(TIM1, ENABLE); //使能或者失能TIM1外设的主输出
}