123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
#include "time.h"
|
|
#include "lcd.h"
|
|
#include "delay.h"
|
|
u32 temp=0;
|
|
u8 time3_flag=0,usart_time=0;
|
|
u8 time_hours=0,time_minutes=0,time_seconds=0;
|
|
//********************************************************************//
|
|
//! 函数名:time3_init
|
|
//! 功能:定时器3初始化
|
|
//! 输入:none
|
|
//! 输出:none
|
|
//********************************************************************//
|
|
void time3_init(u32 rcc,u32 psc)
|
|
{
|
|
//! 声明定时器结构体
|
|
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
|
|
//! 中断优先级配置结构体
|
|
NVIC_InitTypeDef NVIC_InitStructure;
|
|
|
|
//! 开启定时器时钟
|
|
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
|
|
//! 清除中断标志
|
|
TIM_ClearITPendingBit(TIM3,TIM_IT_Update);
|
|
//! 自动重装寄存器周期的值 10000*1/2000=5 秒
|
|
TIM_TimeBaseInitStructure.TIM_Period = rcc;
|
|
//! 预分频系数,2KHz计数频率,72*10e6/(35999+1) = 2000,每 1/2000 秒定时器计数加一
|
|
TIM_TimeBaseInitStructure.TIM_Prescaler = psc;
|
|
//! 设置时钟分割:TDTS = Tck_Tim
|
|
TIM_TimeBaseInitStructure.TIM_ClockDivision = 0;
|
|
//! 计数器向上计数模式
|
|
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
|
|
//! 初始化定时器
|
|
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStructure);
|
|
//! 使能定时器
|
|
TIM_Cmd(TIM3,ENABLE);
|
|
//! 使能定时器中断
|
|
TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE );
|
|
|
|
//! 配置定时器中断优先级
|
|
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
|
|
//!打开TIM_IRQn通道的中断
|
|
NVIC_InitStructure.NVIC_IRQChannel=TIM3_IRQn;
|
|
//!抢占优先级０
|
|
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;
|
|
//! 子优先级1
|
|
NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
|
|
//! 使能
|
|
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
|
|
NVIC_Init(&NVIC_InitStructure);
|
|
}
|
|
//********************************************************************//
|
|
//! 函数名:TIM3_IRQHandler
|
|
//! 功能:定时器3中断回调函数,更新LCD上的时间显示
|
|
//! 输入:none
|
|
//! 输出:none
|
|
//********************************************************************//
|
|
void TIM3_IRQHandler()
|
|
{
|
|
if(TIM_GetITStatus(TIM3,TIM_IT_Update)==SET)
|
|
{
|
|
USART_Cmd(USART1,DISABLE);
|
|
USART_Cmd(USART2,DISABLE);
|
|
|
|
time3_flag=1;
|
|
usart_time++;
|
|
time_seconds++;
|
|
if(time_seconds==60)
|
|
{
|
|
time_seconds=0;
|
|
time_minutes++;
|
|
}
|
|
if(time_minutes==60)
|
|
{
|
|
time_hours++;
|
|
time_minutes=0;
|
|
}
|
|
if(time_hours==24)
|
|
{
|
|
time_hours=0;
|
|
}
|
|
if(time_seconds<=9)
|
|
{
|
|
delay_ms(5);
|
|
LCD_ShowxNum(162,10,0,1,16,0); //154+8=162
|
|
delay_ms(5);
|
|
LCD_ShowxNum(170,10,time_seconds,1,16,0); //154+8+8=170
|
|
}
|
|
else
|
|
{
|
|
delay_ms(5);
|
|
LCD_ShowxNum(162,10,time_seconds,2,16,0);
|
|
}
|
|
if(time_minutes<=9)
|
|
{
|
|
delay_ms(5);
|
|
LCD_ShowxNum(138,10,0,1,16,0); //130+8=138
|
|
delay_ms(5);
|
|
LCD_ShowxNum(146,10,time_minutes,1,16,0); //130+8+8=146
|
|
}
|
|
else
|
|
{
|
|
delay_ms(5);
|
|
LCD_ShowxNum(138,10,time_minutes,2,16,0); //130+8=138
|
|
}
|
|
if(time_hours<=9)
|
|
{
|
|
delay_ms(5);
|
|
LCD_ShowxNum(114,10,0,1,16,0); //98+16=114
|
|
delay_ms(5);
|
|
LCD_ShowxNum(122,10,time_hours,1,16,0); //98+16+8=122
|
|
}
|
|
else
|
|
{
|
|
delay_ms(5);
|
|
LCD_ShowxNum(114,10,time_hours,2,16,0); //98+16=114
|
|
}
|
|
TIM_ClearITPendingBit(TIM3,TIM_IT_Update);
|
|
USART_Cmd(USART1,ENABLE);
|
|
USART_Cmd(USART2,ENABLE);
|
|
}
|
|
}
|
|
|