📄 lcd_main.c
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/*----------------------------------------------------------------
***LCD显示温控器*** 2004-8-12
参考资料：《温度控制器V1.5》、《使用1602液晶显示和PS/2键盘的示例》
本软件仅供学习与参考，引用时请注明版权
本程序源码只供学习参考，不得应用于商业用途，如有需要请联系作者。
http://www.cdle.net
明浩 2004/1/2
pnzwzw@cdle.net
----------------------------------------------------------------*/
#include <REGX51.H>
#include <string.h>
#include <intrins.h>
#define LCM_RW P2_0 //定义引脚
#define LCM_RS P2_1
#define LCM_E P2_2
#define LCM_Data P1
#define Busy 0x80 //用于检测LCM状态字中的Busy标识
#define Key_UP P2_3 //上调温度
#define Key_DOWN P2_5 //下调温度
#define Key_SET P2_4 //设定键（温度设定，长按开电源）
#define RelayOutPort P2_6 //继电器输出
#define TMPort P2_7 //DS1820 DataPort
unsigned char code LCDDis[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x20,0x2d}; //0-9的ASCII码,0x20为空,0x2d为负号
unsigned char i;
static unsigned char bdata StateREG; //可位寻址的状态寄存器
sbit DS1820ON = StateREG^0; //DS1820是否存在
sbit SetTF = StateREG^1; //是否是在温度设置状态
sbit KeySETDown = StateREG^2; //是否已按过SET键标识
sbit PowTF = StateREG^3; //电源标识
sbit KeyTF = StateREG^4; //键盘是否允许
//sbit KeySETDowning = StateREG^5; //SET是否正在按下
static unsigned char bdata TLV _at_ 0x0029; //温度变量高低位
static unsigned char bdata THV _at_ 0x0028;
static signed char TMV; //转换后的温度值
static unsigned char KeyV,TempKeyV; //键值
static signed char TMRomV _at_ 0x0027; //高温限制
static signed char TMSetV _at_ 0x0026; //温度设定值
static unsigned char KSDNum; //SET键连按时的采集次数
static unsigned char IntNum,IntNum2,IntNum3; //中断发生次数，IntNum用于SET长按检测，IntNum2用于设定状态时LCD闪烁
static signed char LCD_One,LCD_Two,LCD_Three; //LCD的显示位 LCD_One为十位，LCD_Two为个位
static signed char LCD_One_set,LCD_Two_set,LCD_Three_set; //设置时的LCD值
static unsigned char Sign, Sign_Set; //负号标识
void WriteDataLCM(unsigned char WDLCM);
void WriteCommandLCM(unsigned char WCLCM,BuysC);
unsigned char ReadDataLCM(void);
unsigned char ReadStatusLCM(void);
void LCMInit(void);
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);
void Delay5Ms(void);
void Delay400Ms(void);
unsigned char code cdle_net[] = {" WellCome! "};
unsigned char code email[] = {" Press Power Key"};
unsigned char cur_temper[]={"Current Temp: "};
unsigned char cur_temper_set[]={"T_Set: "};
unsigned char BF = 0; //定时中断标志，=1时显示当前温度值，=0显示欢迎
void main(void)
{
void InitDS1820(void); //定义函数
void ROMDS1820(void);
void TMVDS1820(void);
void TMRDS1820(void);
void TMWDS1820(void);
void TMREDS1820(void);
void TMERDS1820(void);
void ReadDS1820(void);
void WriteDS1820(void);
void Delay_510(void);
void Delay_110(void);
void Delay_10ms(void);
void Delay_4s(void);
void V2ToV(void);
StateREG = 0; //初始化变量
//SetTF = 1;
PowTF = 1; //关电源
//KeyTF = 1;
THV = 0;
TLV = 0;
TMV = 0;
KeyV = 0;
TempKeyV = 0;
KSDNum = 0;
IntNum = 0;
IntNum2 = 0;
IntNum3 = 0;
InitDS1820(); //初始化
ROMDS1820(); //跳过ROM
TMERDS1820(); //E2PRAM中温度上限值调入RAM
InitDS1820(); //初始化
ROMDS1820(); //跳过ROM
TMRDS1820(); //读出温度指令
ReadDS1820(); //读出温度值和上限值
TMSetV = TMRomV; //拷贝保存在DS18B20ROM里的上限值到TMSetV
Delay400Ms(); //启动等待，等LCM讲入工作状态
LCMInit(); //LCM初始化
Delay5Ms(); //延时片刻(可不要)
EA = 1; //允许CPU中断
ET0 = 1; //定时器0中断打开
TMOD = 0x1; //设定时器0为模式1，16位模式
TH0=0xB1;
TL0=0xDF; //设定时值为20000us（20ms）
TR0 = 1; //开始定时
do
{
if (BF==0)
{
DisplayListChar(0, 0, cdle_net); //显示欢迎信息
DisplayListChar(0, 1, email);
Delay_4s();
//PowTF = 1;
EA=1;
}
if (BF==1)
{
for (i=0;i<16;i++)
{
DisplayOneChar(i,0,cur_temper[i]);//LCD的第1行显示当前温度
}
for (i=0;i<16;i++)
{
DisplayOneChar(i,1,cur_temper_set[i]);//LCD的第二行显示设置温度和继电器状态
}
//ReadDataLCM();//测试用句无意义
EA=1;
}
}
while(1);
}
//定时器0中断外理中键扫描和处理要显示的值
void KeyAndDis_Time0(void) interrupt 1 using 2
{
TH0=0xB1;
TL0=0xDF; //设定时值为20000us（20ms)
if (!Key_UP) KeyV = 1;
if (!Key_DOWN) KeyV = 2;
if (!Key_SET) KeyV = 3;
//KeySETDowning = 0; //清除
if (KeyV != 0) //有键按下
{
Delay_10ms(); //延时防抖 按下10ms再测
if (!Key_UP) TempKeyV = 1;
if (!Key_DOWN) TempKeyV = 2;
if (!Key_SET) TempKeyV = 3;
if (KeyV == TempKeyV) //两次值相等为确定接下了键
{
if (KeyV == 3) //按下SET键，如在SET状态就退出，否则进入
{
//KeySETDowning = 1; //表明SET正在按下
PowTF = 0; //电源标识开
if (!KeyTF) //KeyTF=0,键盘允许
if (SetTF)
{
SetTF = 0; //标识位标识退出设定
InitDS1820(); //初始化
ROMDS1820(); //跳过ROM
TMWDS1820(); //写温度上限指令
WriteDS1820(); //写温度上限到DS18B20ROM
WriteDS1820(); //写温度上限到DS18B20ROM
WriteDS1820(); //写温度上限到DS18B20ROM
InitDS1820(); //初始化
ROMDS1820(); //跳过ROM
TMREDS1820(); //温度上限值COPY回E2PRAM
// V2ToV();
}
else
SetTF = 1;
if (!KeySETDown) //没有第一次按下SET时，KeySETDown标识置1
KeySETDown = 1;
else
KSDNum = KSDNum + 1; //前一秒内有按过SET则开始计数
}
if (SetTF==1) //在SET状态下
{
cur_temper_set[9]=0x3d; //"=" 显示set标志
cur_temper_set[10]=0x73; //"s"
cur_temper_set[11]=0x65; //"e"
cur_temper_set[12]=0x74; //"t"
if ((KeyV == 1) && (!KeyTF))
TMSetV = TMSetV + 1; //上调温度
if ((KeyV == 2) && (!KeyTF))
TMSetV = TMSetV - 1; //下调温度
if (TMSetV <= -55) //限制温度上下限
TMSetV = -55;
if (TMSetV >= 125)
TMSetV = 125;
}
if ((!KeyTF) && (IntNum3 == 0))
{
KeyTF = 1; //当键盘处于可用时，锁定
cur_temper_set[9]=0x20; // 显示空白
cur_temper_set[10]=0x20;
cur_temper_set[11]=0x20;
cur_temper_set[12]=0x20;
}
}
if (KeySETDown) //在2秒内按下了SET则计中断发生次数用于长按SET时计时用
IntNum = IntNum + 1;
if (IntNum > 55) //中断发生了55次时（大约1.2秒）75为1.5秒左右
{
IntNum = 0;
KeySETDown = 0;
if (KSDNum == 55) //如一直长按了SET1.2秒左右
{
RelayOutPort = 1; //关闭继电器输出
PowTF = 1; //电源标识关
//Delay_4s(); //延时
IntNum = 0;
IntNum2 = 0;
IntNum3 = 0;
BF = 0; //显示欢迎信息
EA=0;
}
KSDNum = 0;
}
}
KeyV = 0;
TempKeyV = 0; //清空变量准备下次键扫描
if (PowTF==0)
{
InitDS1820(); //初始化
ROMDS1820(); //跳过ROM
TMVDS1820(); //温度转换指令
Delay_510();
Delay_510(); //延时等待转换完成
InitDS1820(); //初始化
ROMDS1820(); //跳过ROM
TMRDS1820(); //读出温度指令
ReadDS1820(); //读出温度值
V2ToV(); //转换显示值
if (TMV > TMSetV) //根据采集到的温度值控制继电器
{
RelayOutPort = 0;
cur_temper_set[13]=0x20; //" "
cur_temper_set[14]=0x4f; //"O"
cur_temper_set[15]=0x4e; //"N"
}
else
{
RelayOutPort = 1;
cur_temper_set[13]=0x4f; //"O"
cur_temper_set[14]=0x46; //"F"
cur_temper_set[15]=0x46; //"F"
}
if (SetTF) IntNum2 = IntNum2 + 1; //用于闪烁计数
if (IntNum2 > 50 ) IntNum2 = 0;
if (KeyTF) IntNum3 = IntNum3 + 1; //用于防止按键连按
if (IntNum3 > 25)
{
IntNum3 = 0;
KeyTF = 0;
}
if ((SetTF) && (IntNum2 < 25)) goto InitEnd; //计数在后半段时显示
BF=1; //让显示温度值
EA=0; //关中断
}
InitEnd:;
}
void V2ToV(void) //数值转换
{
TLV = TLV >> 4;
THV = THV << 4; //读出的高低位数值移位
TMV = TLV | THV; //合并高低位放入TM为实际温度值
Sign = 0; Sign_Set=0;
Sign_Set = TMSetV >> 7; //取符号
Sign = TMV >> 7;
if (Sign)
{
LCD_One = (~TMV) / 100; //转换百位值
LCD_Two = ((~TMV) - LCD_One * 100)/10;
LCD_Three = (~TMV) - LCD_One * 100 - LCD_Two * 10;
}
else
{
LCD_One = (TMV) / 100; //转换百位值
LCD_Two = (TMV - LCD_One * 100)/10;
LCD_Three = TMV - LCD_One * 100 - LCD_Two * 10;
}
if (Sign_Set)
{
LCD_One_set = (~(TMSetV-1)) / 100; //SET状态下显示设定值
LCD_Two_set = ((~(TMSetV-1)) - LCD_One_set * 100)/10;
LCD_Three_set = (~(TMSetV-1)) - LCD_One_set * 100 - LCD_Two_set * 10;
}
else
{
LCD_One_set = (TMSetV) / 100; //SET状态下显示设定值
LCD_Two_set = (TMSetV - LCD_One_set * 100)/10;
LCD_Three_set = TMSetV - LCD_One_set * 100 - LCD_Two_set * 10;
}
//转LCD字段 温度值
if (LCD_One) //超过百时十位的处理
LCD_Two = LCDDis[LCD_Two];
else
{
if (LCD_Two == 0)
LCD_Two = LCDDis[10];
else
LCD_Two = LCDDis[LCD_Two];
}
if (Sign)
LCD_One = LCDDis[11];
else
{
if (LCD_One == 0)
LCD_One = LCDDis[10];
else
LCD_One = LCDDis[LCD_One];
}
LCD_Three = LCDDis[LCD_Three];
cur_temper[13]=LCD_One; //把温度值的ASCII码放入cur_temper的13，14，15位
cur_temper[14]=LCD_Two;
cur_temper[15]=LCD_Three;
//转LCD字段 设置值
if (LCD_One_set) //超过百时十位的处理
LCD_Two_set = LCDDis[LCD_Two_set];
else
{
if (LCD_Two_set == 0)
LCD_Two_set = LCDDis[10];
else
LCD_Two_set = LCDDis[LCD_Two_set];
}
if (Sign_Set)
LCD_One_set = LCDDis[11];
else
{
if (LCD_One_set == 0)
LCD_One_set = LCDDis[10];
else
LCD_One_set = LCDDis[LCD_One_set];
}
LCD_Three_set = LCDDis[LCD_Three_set];
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