版权声明:转载记得声明~~~ :) https://blog.csdn.net/ReCclay/article/details/87685802
工程可见Github<传送门>
一、主要代码
main.c
/*******************************************************************************
* 文件名:main.c
* 描 述:
* 作 者:CLAY
* 版本号:v1.0.0
* 日 期: 2019年2月19日
* 备 注:修改后的LCD例程
* 采用定时器实现的简单1s计时,并显示到LCD上
*******************************************************************************
*/
#include "stm32f10x.h"
#include "lcd.h"
#include "e2prom.h"
#include "stdio.h"
#include "i2c.h"
#include "adc.h"
#include "rtc.h"
#include "usart2.h"
#include "pwm.h"
#include "pwm_oc.h"
#include "pwm_ic.h"
#include "timer.h"
u32 TimingDelay = 0;
u8 RxdCnt = 0;
u8 RxdOver = 0;
u8 RxdBuf[20];
void Delay_Ms(u32 nTime);
u8 RTC_Flag = 0;
u32 tmr = 0;
//Main Body
int main(void)
{
u8 str[20];
STM3210B_LCD_Init();
LCD_Clear(Blue);
LCD_SetBackColor(Blue);
LCD_SetTextColor(White);
SysTick_Config(SystemCoreClock/1000);
//PWM_Init(500, 60);//500Hz 60%方波//PA1
PWM_OC_Init(500, 60);//500Hz 60%方波 PA1
PWM_IC_Init();//PA7
TIM4_Init(10000, 7200);//定时1s
while(1)
{
sprintf((char *)str, " %d ", tmr);
LCD_DisplayStringLine(Line5, str);
}
}
//
void Delay_Ms(u32 nTime)
{
TimingDelay = nTime;
while(TimingDelay != 0);
}
timer.c
#include "stm32f10x.h"
void TIM4_Init(u16 period, u16 prescaler)
{
NVIC_InitTypeDef NVIC_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
TIM_TimeBaseStructure.TIM_Period = period-1;//总的值设置为0xFFFF
TIM_TimeBaseStructure.TIM_Prescaler = prescaler-1;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
TIM_Cmd(TIM4, ENABLE);//开启定时器
TIM_ITConfig(TIM4, TIM_IT_Update, ENABLE);//开启定时器更新中断
}
timer.h
#ifndef _TIMER_H
#define _TIMER_H
void TIM4_Init(u16 period, u16 prescaler);
#endif
stm32f10x_it.c
...
extern u32 tmr;
void TIM4_IRQHandler(void)
{
if(TIM_GetITStatus(TIM4, TIM_IT_Update) == SET)
{
TIM_ClearITPendingBit(TIM4, TIM_IT_Update);
tmr++;
if(tmr >= 9999)
{
tmr = 0;
}
}
}
...