12864实现圆形模拟时钟及温度显示.docx
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12864实现圆形模拟时钟及温度显示
显示效果如下图
MCU:
STC89C52RC
LCD:
12864液晶
温度传感器:
DS18B20
程序如下：
#include
#include
#include
#include
#defineucharunsignedchar
#defineuintunsignedint
#definedelayNOP（）;{_nop_（）;_nop_（）;_nop_（）;_nop_（）;};
#definepi3.1415926
/*************12864LCD引脚定义*************/
#defineLCD_dataP0//数据口
sbitLCD_RS=P2^3;//寄存器选择输入
sbitLCD_RW=P2^2;//液晶读/写控制
sbitLCD_EN=P2^1;//液晶使能控制
sbitLCD_PSB=P2^4;//串/并方式控制
sbitLCD_RST=P2^5;//液晶复位端口
sbitk1=P3^5;//按键
sbitk2=P3^2;
sbitk3=P3^3;
sbitk4=P3^4;
sbitDQ=P2^0;//数据口defineinterface
uchara,b,c,count,num;
uinttemp;
uchartabbjsj[]="北京时间";
uchartabsswd[]="实时温度";
uchartab[]="01:
00:
00";
ucharcodetable[]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00};
/*******************************************************************/
/**/
/*延时函数*/
/**/
/*******************************************************************/
voiddelay（intms）
{
while（ms--）
{
uchari;
for（i=0;i<150;i++）
{
_nop_（）;
_nop_（）;
_nop_（）;
_nop_（）;
}
}
}
/*******************************************************************/
/**/
/*精确延时函数，延时1秒，软件算得*/
/**/
/*******************************************************************/
voidDelay_S（void）//延时1s误差0us
{
unsignedchara,b,c;
for（c=167;c>0;c--）
for（b=171;b>0;b--）
for（a=16;a>0;a--）;
_nop_（）;//ifKeil,requireuseintrins.h
}
/*******************************************************************/
/**/
/*检查LCD忙状态*/
/*lcd_busy为1时，忙，等待。
lcd-busy为0时,闲，可写指令与数据。
*/
/**/
/*******************************************************************/
bitlcd_busy（）
{
bitresult;
LCD_RS=0;
LCD_RW=1;
LCD_EN=1;
delayNOP（）;
result=（bit）（P0&0x80）;
LCD_EN=0;
return（result）;
}
/*******************************************************************/
/**/
/*写指令数据到LCD*/
/*RS=L，RW=L，E=高脉冲，D0-D7=指令码。
*/
/**/
/*******************************************************************/
voidlcd_wcmd（ucharcmd）
{
while（lcd_busy（））;
LCD_RS=0;
LCD_RW=0;
LCD_EN=0;
_nop_（）;
_nop_（）;
LCD_data=cmd;
delayNOP（）;
LCD_EN=1;
delayNOP（）;
LCD_EN=0;
}
/*******************************************************************/
/**/
/*写显示数据到LCD*/
/*RS=H，RW=L，E=高脉冲，D0-D7=数据。
*/
/**/
/*******************************************************************/
voidlcd_wdat（uchardat）
{
while（lcd_busy（））;
LCD_RS=1;
LCD_RW=0;
LCD_EN=0;
LCD_data=dat;
delayNOP（）;
LCD_EN=1;
delayNOP（）;
LCD_EN=0;
}
/*******************************************************************/
/**/
/*从lcd读取数据到data*/
/*RS=H，RW=L，E=高脉冲，D0-D7=数据。
*/
/**/
/*******************************************************************/
ucharlcd_rdat（）
{
uchardat;
while（lcd_busy（））;
LCD_data=0XFF;
LCD_RS=1;
LCD_RW=1;
LCD_EN=0;
LCD_EN=1;
dat=LCD_data;
LCD_EN=0;
return（dat）;
}
/*******************************************************************/
/**/
/*LCD初始化设定*/
/**/
/*******************************************************************/
voidlcd_init（）
{
LCD_PSB=1;//并口方式
LCD_RST=0;//液晶复位
delay（3）;
LCD_RST=1;
delay（3）;
lcd_wcmd（0x34）;//扩充指令操作
delay（5）;
lcd_wcmd（0x30）;//基本指令操作
delay（5）;
lcd_wcmd（0x0C）;//显示开，关光标
delay（5）;
lcd_wcmd（0x01）;//清除LCD的显示内容
delay（5）;
}
/***********************************************************
函数名：
DrawPoint
函数说明：
画点
传入参数：
打点位置（x0,y0）;color=1,点亮；color=0,擦除
传出参数：
无
返回值：
无
**********************************************************/
voidDrawPoint（unsignedcharx,unsignedchary,unsignedcharcolor）
{
unsignedcharrow,collum,cbite;
unsignedchartempH,tempL;
lcd_wcmd（0x34）;//打开扩充指令集
lcd_wcmd（0x36）;//打开图形显示
collum=x>>4;
cbite=x&0x0f;
if（y<32）
row=y;
else
{
row=y-32;
collum+=8;
}
lcd_wcmd（0x80+row）;//先写Y坐标
lcd_wcmd（0x80+collum）;//再写X坐标
lcd_rdat（）;
tempH=lcd_rdat（）;//先读出高字节
tempL=lcd_rdat（）;//再读出低字节
lcd_wcmd（0x80+row）;//先写Y坐标
lcd_wcmd（0x80+collum）;//再写X坐标
if（color）
{
if（cbite<8）
{
tempH|=（1<<（7-cbite））;
}
else
{
tempL|=（1<<（15-cbite））;
}
}
else
{
if（cbite<8）
{
tempH&=~（1<<（7-cbite））;
}
else
{
tempL&=~（1<<（15-cbite））;
}
}
lcd_wdat（tempH）;
lcd_wdat（tempL）;
lcd_wcmd（0x30）;
}
/***********************************************************
函数名：
line
函数说明：
画直线
传入参数：
直线起始位置（x0,y0）;终点（x1,y1）
传出参数：
无
返回值：
无
**********************************************************/
voidline（unsignedcharx0,unsignedchary0,unsignedcharx1,unsignedchary1,unsignedcharcolor）
{
intdx;/*直线x轴差值变量*/
intdy;/*直线y轴差值变量*/
chardx_sym;/*x轴增长方向，为-1时减值方向，为1时增值方向*/
ch
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