//计数模式
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //初始TIM3
/***************************通道1 ********************************/
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //PWM2
#endif
TIM.c
#include "STM32Lib\\stm32f10x.h"
void Tim1_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
#define GET_RIGHT() (GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_9))
extern void USART1_Putc(u8 c);
extern void USART_Configuration(void);
extern void USART1_Puts(char * str);
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //正向通道有效
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;//反向通道无效
TIM_OCInitStructure.TIM_Pulse = 300; //占空时间
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
hal.h
#ifndef HAL_H
#define HAL_H
//硬件初始化
extern void ChipHalInit(void);
extern void ChipOutHalInit(void);
//输入宏定义
#define GET_LEFT() (GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_8))
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //PWM功能使能
TIM_OCInitStructure.TIM_Pulse = CCR1_Val; //写比较值(占空比
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数
TIM_TimeBaseStructure.TIM_Period = 2000; //装载值1000k/2000=500hz
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
GPIO_InitTypeDef GPIO_InitStructure;
/* PA8设置为功能脚(PWM) */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue; //分频
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //时钟分割
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
int main(void)
{
RCC_Configuration();
GPIO_Configuration();
PrescalerValue = (uint16_t) (SystemCoreClock / 24000000) - 1;
TIM_TimeBaseStructure.TIM_Period = 1000; //周期
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
/* PC8按键输入*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
}
if(GET_RIGHT()==0)
{
while(GET_RIGHT()==0);
if(pulse<=2000)
{
pulse-=60;
}
else
{
pulse=1800;
}
d_2_char(pulse);
USART1_Puts(buffer);
USART1_Puts("\r\n");
}
SetT1Pwm1(pulse);
u8 table[11]={"0123456789 "};
char buffer[10]={"0000000000"};
void Delay(u16 n);
void d_2_char(u32 x)
{
buffer[SIZE+0]=table[x%10000000000/100000];
buffer[SIZE+1]=table[x%1000000000/100000];
{
u16 i;
while(speed!=0)
{
speed--;
for(i=0;i<400;i++);
}
}
extern void SetT1Pwm1(u16 pulse);
int main(void)
{
u16 pulse=300;
ChipHalInit(); //片内硬件初始化
ChipOutHalInit(); //片外硬件初始化
/* TIM1 Main Output Enable */
);
}
//设置捕获寄存器1
void SetT1Pwm1(u16 pulse)
{
TIM1->CCR1=pulse;
}
main.c
/************************************************************
}
}
#include "stm32f10x.h"
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
uint16_t CCR1_Val = 250;
uint16_t CCR2_Val = 500;
* Function Name : GPIO_Configuration
*设置PD3,PD4,PD5,PD6为键盘输入
*设置PB0,5,8,9; PC5,7; PD7 ;PA8为输出LED灯
*******************************************************************************/
STM32+按键调控PWM输出+串口输出占空比(2010-09-20 21:59)
分类：STM32学习笔记
GPIO.c
#include "STM32Lib\\stm32f10x.h"
#include "hal.h"
/*******************************************************************************
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0;
TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);
/* Channel 1 Configuration in PWM mode */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //PWM模式2
**实验名称:PWM
**功能:是PA8产生PWM输出,按键调节占空比
*************************************************************/
#include "STM32Lib\\stm32f10x.h"
#include "hal.h"
#define SIZE 0
buffer[SIZE+6]=table[x%10000/1000];
buffer[SIZE+7]=table[x%1000/100];
buffer[SIZE+8]=table[x%100/10];
buffer[SIZE+9]=table[x%10];
}
//延迟函数
void Delay(u16 speed)
GPIO_Init(GPIOA, &GPIO_InitStructure);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);
TIM_DeInit(TIM1);
/*TIM1时钟配置*/