使用DS1302的时钟单片机程序 Lcd1602液晶显示 -

#include<reg52.h>
struct sTime{ //日期时间结构体申明
unsigned int year;
unsigned char mon;
unsigned char day;
unsigned char hour;
unsigned char min;
unsigned char sec;
unsigned char week;
};
bit flag200ms = 1; //200ms 定时标志
struct sTime bufTime; //日期时间缓冲区
unsigned char setIndex = 0; //时间设置索引 0 0 就表示正常运行，
unsigned char T0RH, T0RL;
void RefreshTimeShow();
void ConfigTimer0(unsigned int ms);
extern void KeyScan();
extern void KeyDriver();
extern void InitLcd1602();
extern void LcdOpenCursor();
extern void LcdCloseCursor();
extern void LcdSetCursor(unsigned char x, unsigned char y);
extern void LcdShowStr(unsigned char x, unsigned char y, unsigned char *str);
extern void InitDS1302();
extern void SetRealTime(struct sTime *time);
extern void GetRealTime(struct sTime *time);
void main()
{
unsigned char psec = 0xaa; //秒备份，初值 AA 确保首次读取时间后刷新显示
EA = 1;
ConfigTimer0(1);
InitLcd1602();
InitDS1302();
LcdShowStr(0, 0, "20 - - Week "); //初始化屏幕上固定不变的内容
LcdShowStr(4, 1, " : : ");
while(1)
{
KeyDriver(); //调用按键驱动
if(flag200ms && (setIndex == 0))
{
flag200ms = 0; //每隔200ms且未处于设置状态时，
GetRealTime(&bufTime); //获取当前时间
if(psec != bufTime.sec) //检测到时间有变化时刷新显示
{
RefreshTimeShow();
psec = bufTime.sec; //用当前值更新上次秒数
}
}
}
}
/* 将一个BCD码字节显示到屏幕上，(x,y)-屏幕起始坐标，bcd-待显示BCD码 */
void ShowBCDByte(unsigned char x, unsigned char y, unsigned char bcd)
{
unsigned char str[4];
str[0] = (bcd >> 4) + '0';
str[1] = (bcd & 0x0f) + '0';
str[2] = '\0';
LcdShowStr(x, y, str);
}
void ShowBCDWeek(unsigned char x, unsigned char y, unsigned char bcd)
{
unsigned char str[3];
str[0] = (bcd & 0x0f) + '0';
str[1] = '\0';
LcdShowStr(x, y, str);
}
/* 刷新日期时间的显示 */
void RefreshTimeShow()
{
ShowBCDByte(2, 0, bufTime.year);
ShowBCDByte(5, 0, bufTime.mon);
ShowBCDByte(8, 0, bufTime.day);
ShowBCDByte(4, 1, bufTime.hour);
ShowBCDByte(7, 1, bufTime.min);
ShowBCDByte(10, 1, bufTime.sec);
ShowBCDWeek(15, 0, bufTime.week);
}
/* 刷新当前设置位的光标指示 */
void RefreshSetCursorShow()
{
switch(setIndex)
{
case 1: LcdSetCursor(2, 0); break;
case 2: LcdSetCursor(3, 0); break;
case 3: LcdSetCursor(5, 0); break;
case 4: LcdSetCursor(6, 0); break;
case 5: LcdSetCursor(8, 0); break;
case 6: LcdSetCursor(9, 0); break;
case 7: LcdSetCursor(4, 1); break;
case 8: LcdSetCursor(5, 1); break;
case 9: LcdSetCursor(7, 1); break;
case 10: LcdSetCursor(8, 1); break;
case 11: LcdSetCursor(15, 0); break;
default: break;
}
}
unsigned char DecrBCDHight(unsigned char bcd)
{
if((bcd & 0xf0) > 0x00)
{
bcd -= 0x10;
}
else
{
if(setIndex == 1)
bcd |= 0x90;
else if(setIndex == 3)
bcd |= 0x10;
else if(setIndex == 5)
bcd |= 0x30;
else if(setIndex == 7)
bcd |= 0x20;
else if((setIndex == 9))
bcd |= 0x60;
}
return bcd;
}
unsigned char DecrBCDLow(unsigned char bcd)
{
if((bcd & 0x0f) > 0x00)
{
bcd -= 0x01;
}
else if(setIndex == 11)
{
bcd |= 0x07;
}
else
{
bcd |= 0x09;
}
return bcd;
}
unsigned char IncrBCDHight(unsigned char bcd)
{
if((setIndex == 1)&&((bcd & 0xf0)< 0x90))
{
bcd += 0x10;
}
else if((setIndex == 3)&&(bcd < 0x10))
{
bcd +=0x10;
}
else if((setIndex == 5)&&(bcd < 0x30))
{
bcd += 0x10;
}
else if((setIndex == 7)&&(bcd < 0x20))
{
bcd += 0x10;
}
else if(setIndex == 9)
{
bcd += 0x10;
}
else if(setIndex == 11)
{
if(bcd < 0x07)
{
bcd++;
}
else
{
bcd = 0x01;
}
}
else
{
bcd &= 0x0f;
}
return bcd;
}
unsigned char IncrBCDLow(unsigned char bcd)
{
if(setIndex != 11)
{
if ((bcd&0x0F) < 0x09)
bcd += 0x01;
else
bcd &= 0xF0;
}
else
{
if ((bcd&0x0F) < 0x07)
bcd += 0x01;
else
bcd &= 0x01;
}
return bcd;
}
/* 递增当前设置位的值 */
void IncrSetTime()
{
switch(setIndex)
{
case 1: bufTime.year = IncrBCDHight(bufTime.year); break;
case 2: bufTime.year = IncrBCDLow(bufTime.year); break;
case 3: bufTime.mon = IncrBCDHight(bufTime.mon); break;
case 4: bufTime.mon = IncrBCDLow(bufTime.mon); break;
case 5: bufTime.day = IncrBCDHight(bufTime.day); break;
case 6: bufTime.day = IncrBCDLow(bufTime.day); break;
case 7: bufTime.hour = IncrBCDHight(bufTime.hour); break;
case 8: bufTime.hour = IncrBCDLow(bufTime.hour); break;
case 9: bufTime.min = IncrBCDHight(bufTime.min); break;
case 10: bufTime.min = IncrBCDLow(bufTime.min); break;
case 11: bufTime.week = IncrBCDLow(bufTime.week); break;
default: break;
}
RefreshTimeShow();
RefreshSetCursorShow();
}
/* 递减当前设置位的值 */
void DecrSetTime()
{
switch(setIndex)
{
case 1: bufTime.year = DecrBCDHight(bufTime.year); break;
case 2: bufTime.year = DecrBCDLow(bufTime.year); break;
case 3: bufTime.mon = DecrBCDHight(bufTime.mon); break;
case 4: bufTime.mon = DecrBCDLow(bufTime.mon); break;
case 5: bufTime.day = DecrBCDHight(bufTime.day); break;
case 6: bufTime.day = DecrBCDLow(bufTime.day); break;
case 7: bufTime.hour = DecrBCDHight(bufTime.hour); break;
case 8: bufTime.hour = DecrBCDLow(bufTime.hour); break;
case 9: bufTime.min = DecrBCDHight(bufTime.min); break;
case 10: bufTime.min = DecrBCDLow(bufTime.min); break;
case 11: bufTime.week = DecrBCDLow(bufTime.week); break;
default: break;
}
RefreshTimeShow();
RefreshSetCursorShow();
}
/* 左移设置位 */
void LeftShiftTimeSet()
{
if(setIndex != 0)
{
if(setIndex > 1)
setIndex--;
else
setIndex = 11;
RefreshSetCursorShow();
}
}
/* 右移设置位 */
void RightShifTimeSet()
{
if(setIndex != 0)
{
if(setIndex < 11)
setIndex++;
else
setIndex = 1;
RefreshSetCursorShow();
}
}
/* 进入设置状态 */
void EnterTimeSet()
{
setIndex = 2; //把设置索引设置为2，即可进入设置状态
LeftShiftTimeSet(); //再利用现成的左移操作移到位置1并完成显示刷新
LcdOpenCursor(); //打开光标闪烁效果
}
/* 退出设置状态，save-是否保存当前设置的时间值 */
void ExitTimeSet(bit save) //save = 1 保存，save = 0 不保存
{
setIndex = 0; //把设置索引设置为0，即可退出设置状态
if(save) //需保存时即把当前设置时间写入DS1302
SetRealTime(&bufTime);
LcdCloseCursor(); //关闭光标显示
}
/* 按键动作函数，根据键码执行相应的操作，keycode-按键键码 */
void KeyAction(unsigned char keycode)
{
if((keycode >= '0')&&(keycode <= '9'))//不响应字符键
{}
else if((keycode == 0x26)) //向上键，递增当前设置位的值
{
IncrSetTime();
}
else if(keycode == 0x28) //向下键，递减当前设置位的值
{
DecrSetTime();
}
else if(keycode == 0x25) //向左键，向左切换设置位
{
LeftShiftTimeSet();
}
else if(keycode == 0x27) //向右键，向右切换设置位
{
RightShifTimeSet();
}
else if(keycode == 0x0d) //回车键，进入设置模式/启用当前设置值
{
if(setIndex == 0) //不处于设置状态时，进入设置状态
{
EnterTimeSet();
}
else //已处于设置状态时，保存时间并退出设置状态
{
ExitTimeSet(1);
}
}
else if(keycode == 0x1b) //Esc键，取消当前设置
{
ExitTimeSet(0);
}
}
void ConfigTimer0(unsigned int ms)
{
unsigned long tmp;
tmp = 11059200 / 12;
tmp = tmp * ms / 1000;
tmp = 65536 - tmp;
tmp = tmp + 28;
T0RH = (unsigned char)(tmp >> 8);
T0RL = (unsigned char)tmp;
TMOD = (TMOD & 0xf0)|0x01;
TH0 = T0RH;
TL0 = T0RL;
ET0 = 1;
TR0 = 1;
}
void IntTimer0() interrupt 1
{
static unsigned char tmr200ms = 0;
TH0 = T0RH;
TL0 = T0RL;
KeyScan();
tmr200ms++;
if(tmr200ms >= 200)
{
tmr200ms = 0;
flag200ms = 1;
}
}

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