為什么按鍵加，設(shè)置時(shí)間999分鐘為上限，為什么加到255自動(dòng)復(fù)位從0開始？附單片機(jī)代碼

ID:858009 · 發(fā)表于 2021-12-10 16:42

代碼設(shè)置的上限是999分鐘，為什么加到255分鐘之后，再按加就變?yōu)?了，求解原因

代碼：

#include "CH554.H"
#include "Debug.H"
#include "GPIO.H"
#include "HT1621.H"
#include "Timer.H"
#include "stdio.h"
#include <string.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
// // 0 1 2 3 4 5 6 7 8 9
uchar code tabe1[11] = {0xF0,0x00,0xD0,0x90,0x20,0xB0,0xF0,0x10,0xF0,0xB0};
uchar code tabe2[11] = {0xA0,0xA0,0x60,0xE0,0xE0,0xC0,0xC0,0xA0,0xE0,0xE0};
sbit key1 = P3^3; //分鐘加
sbit key2 = P3^4; //分鐘減
uchar min,min0,min1,min2,sec,sec1,sec2,count;
void delay_ms(uint z) //延時(shí)程序1
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
/*******************************************************************************
* Function Name : void Display_Init()
* Description : 時(shí)間顯示
*******************************************************************************/
void Display_Init(uchar min0,uchar min1,uchar min2,uchar sec1,uchar sec2)
{
Write_1621(3,tabe1[min0],4);
Write_1621(4,tabe2[min0],4);
Write_1621(5,tabe1[min1],4);
Write_1621(6,tabe2[min1],4);
Write_1621(7,tabe1[min2],4);
Write_1621(8,tabe2[min2],4);
Write_1621(11,tabe1[sec1],4);
Write_1621(12,tabe2[sec1],4);
Write_1621(13,tabe1[sec2],4);
Write_1621(14,tabe2[sec2],4);
}
/*******************************************************************************
* Function Name : void Timer0_Init()
* Description : 定時(shí)器初始化
*******************************************************************************/
void Time0_Init()
{
count = 0;
min = 0;
sec = 59;
mTimer0Clk12DivFsys(); //T0定時(shí)器時(shí)鐘設(shè)置
mTimer_x_ModInit(0,1); //T0定時(shí)器模式設(shè)置
mTimer_x_SetData(0,0xC350); //T0定時(shí)器賦值
mTimer0RunCTL(1); //T0定時(shí)器啟動(dòng)
ET0 = 1; //T0定時(shí)器中斷開啟
EA = 1;
}
/*******************************************************************************
* Function Name : mTimer0Interrupt()
* Description : CH554定時(shí)計(jì)數(shù)器0定時(shí)計(jì)數(shù)器中斷處理函數(shù)
*******************************************************************************/
void mTimer0Interrupt( void ) interrupt INT_NO_TMR0 using 1 //timer0中斷服務(wù)程序,使用寄存器組1
{
mTimer_x_SetData(0,0xC350); //非自動(dòng)重載方式需重新給TH0和TL0賦值
count++;
if(count==10)
{
count=0;
if(sec==0)
{
if(min!=0)
{
sec=59;
min--;
}
else
{
mTimer0RunCTL(0); //T0定時(shí)器停止
}
}
else sec--;
}
}
void main( )
{
Time0_Init();
Init_1621(); //初始化HT1621
HT1621_all_off(); //清空LCD顯示
while(1)
{
if(key1==0)
{
delay_ms(100);
if(key1==0)
{
if(min!=999)
{
min++;
}
}
while(!key2);
delay_ms(1000);
while(!key2);
}
if(key2==0)
{
delay_ms(100);
if(key2==0)
{
if(min!=0)
{
min--;
}
}
while(!key1);
delay_ms(1000);
while(!key1);
}
min0=min/100;
min1=min%100/10;
min2=min%10;
sec1=sec/10;
sec2=sec%10;
Display_Init(min0,min1,min2,sec1,sec2);
}
}