KS0108的LCD12864实际显示数据虚读是怎样的

Question

KS0108的LCD12864仿真时成功，但是实际显示时却不能成功，只是亮着，看前辈说要虚读一次，有能详细明白的一点吗

Answer 1

#include
#include
#include
#include"lcd12864.h"
#include"cncode.h"
#include"encode.h"

uchar xdata dispbuf[8][128];//1024Byte用于存放显示数据

void LcdInit() //lcd初始化
{
cs1 = 1;
cs2 = 1;
WriteCmd(DISP_OFF);
WriteCmd(DISP_Y);
WriteCmd(DISP_ON);
}

void WriteCmd(uchar cmd) //lcd写命令
{
WaiteBusy();
e=0;
rw = 0;
rs = 0;
DBPort = cmd;
e = 1;
nop();
nop();
e = 0;
}

void WriteData(uchar wdata) //lcd写数据
{
WaiteBusy();
rs = 1;
rw = 0;
DBPort = wdata; //数据送入总线
e = 1;
nop();
nop();
e = 0;
}

/*从LCD读取状态*/
uchar getState(void)

{
uchar temp; //定义状态变量
DBPort = 0xFF; //黑屏0xff
e=0; //准备读取
rs=0; //选择命令寄存器
rw=1; //选择读取方式
e=1; //使能输出
nop();
e=0; //停止读取
temp = DBPort; //读取数据端口总线
return temp; //返回
}

void WaiteBusy()
{
uchar temp; //状态信息变量（用于判断是否忙）
while(1)
{
temp = getState(); //读取LCD状态
temp &= 0x80; //与运算，检查第7位busy信号
if(temp == 0) //若状态值为0，则循环结束
break;
}
}

void DisPlay16(unsigned char line, unsigned char column , unsigned char LorR , unsigned char addr)
{
unsigned char i;
unsigned char j;

cs1 = 0;
cs2 = 0;
if(LorR == 0)
{
    cs1 = 1;
}
else
{
    cs2 = 1;
}

for(i=0; i<2 ;i++)     //每个字符占2页，所以写2次
{
    for(j=0; j<16 ;j++)  //连续16次（上下半字各16个编码）
    {
        WriteCmd(DISP_PAGE|(i+line));    //写入显示页地址
        WriteCmd(DISP_X|(j+column));      //写入显示列地址
        WriteData(Hzk[addr*32 + j + 16*i]);  //每页写入16个字节的汉字编码数据
    }
}
cs1 = 0;
cs2 = 0;

}

void DisPlay8(unsigned char line, unsigned char column , unsigned char LorR , unsigned char addr)
{
unsigned char i;
unsigned char j;

cs1 = 0;
cs2 = 0;
if(LorR == 0)
{
    cs1 = 1;
}
else
{
    cs2 = 1;
}

for(i=0; i<2 ;i++)     //每个字符占2页，所以写2次
{
    for(j=0; j<8 ;j++)    //连续8次（上下半字各8个编码）
    {
        WriteCmd(DISP_PAGE|(i+line));   //写入显示页地址
        WriteCmd(DISP_X|(j+column));     //写入显示列地址
        WriteData(Ezk[addr*16 + j + 8*i]);  //每页写入8个字节编码数据
    }
}
cs1 = 0;
cs2 = 0;    

}

void DisPlay8_not(unsigned char line, unsigned char column , unsigned char LorR , unsigned char addr)
{
unsigned char i;
unsigned char j;

cs1 = 0;
cs2 = 0;
if(LorR == 0)
{
    cs1 = 1;
}
else
{
    cs2 = 1;
}

for(i=0; i<2 ;i++)
{
    for(j=0; j<8 ;j++)
    {
        WriteCmd(DISP_PAGE|(i+line));
        WriteCmd(DISP_X|(j+column));
        WriteData(~Ezk[(addr*16 + j + 8*i)]);
    }
}
cs1 = 0;
cs2 = 0;    

}

/****************************************
函数功能：将显示缓冲区所有数据送到12864显示
****************************************/
void Show()
{
uchar i,j;
LcdInit();
for(j=0;j<8;j++)
{

cs1=0;
cs2=1;
WriteCmd(DISP_PAGE+j);
WriteCmd(DISP_X);
for(i=64;i<128;i++)
WriteData(dispbuf[j][i]);

}
}

void ClearBuff()//清空显存,0x00
{
uchar i,j;
for(j=0;j<8;j++)
{
for(i=0;i<128;i++)
dispbuf[j][i] = 0x00;
}

}
void ClearScreen() //清屏
{
uchar i,j;

for(j=0;j<8;j++)
{       
    cs1=1;
    cs2=1;
    WriteCmd(DISP_PAGE+j);
    WriteCmd(DISP_X);
    for(i=64;i<128;i++)
        WriteData(0x00);    
}

}
/*********************************************
函数功能：drawflag = 1:在12864任意位置画点
drawflag = 0:在12864任意位置清除点

*********************************************/
void DrawPixel(uchar x,uchar y,bit drawflag)
{
uchar a,b;
a = y/0x08; //根据所在行位置，将该字节对应位置1（显）
b = y&0x07; //根据所在行位置，将该字节对应位置0（擦除）
if(drawflag)
dispbuf[a][x] |= BIT(b);
else
dispbuf[a][x] &= ~BIT(b);

}

/********************************************************************************
**函数功能描述:画直函数,采用非浮点型变量计算，显著提高了运算速度
**输 入:x0,y0,x1,y1:起始,结束点(坐标)

        ***注意坐标不要越界***
        x:0-127
        y:0-63

**输 出:无

坐标如图所示

|(0,0) (127,0)|
| |
| |
| |
| |
| |
| |

|(0,63) (127,63)|

*******************************************************************************/

void Line(uchar x0,uchar y0,uchar x1,uchar y1)
{

//使用Bresenham算法画直线
char dx,dy,x_increase,y_increase;
int error;
uchar x,y;
uchar i;
dx = x1-x0;
dy = y1-y0;
if(dx>=0)//判断x增长方向
x_increase = 1;
else
x_increase = -1;
if(dy>=0)//判断y增长方向
y_increase = 1;
else
y_increase = -1;

x = x0;
y = y0;
dx = cabs(dx);
dy = cabs(dy);
if(dx > dy)
{
    error = -dx;
    for(i=0;i<dx+1;i++)
    {
        DrawPixel(x,y,1);
        x += x_increase;
        error += 2*dy;
        if(error >= 0)
        {
            y += y_increase;
            error -= 2*dx;
        }
    }
}
else
{
    error = -dy;
    for(i=0;i<dy+1;i++)
    {
        DrawPixel(x,y,1);
        y += y_increase;
        error += 2*dx;
        if(error >= 0)
        {
            x += x_increase;
            error -= 2*dy;
        }
    }
}

}

/*****************************************************
函数功能：指定的位置按传入的数据画一条长度为len(len= *****************************************************/
void DrawVerticalLine(uchar x,uchar y,uchar len,uchar d)
{
uchar i;
for(i=0;i {
if(d&0x01)
DrawPixel(x,y+i,1);
d >>= 1;
}
}

#define CLK_X 95//时钟中心点坐标
#define CLK_Y 31

//秒针结束点坐标，起点坐标(x0,y0)=(31，31);
uchar code secondpointerx[]=//x1
{
//0-15秒
CLK_X+ 0,CLK_X+ 2,CLK_X+ 4,CLK_X+ 7,CLK_X+ 9,CLK_X+11,CLK_X+13,CLK_X+14,CLK_X+16,CLK_X+18,
CLK_X+19,CLK_X+20,CLK_X+21,CLK_X+21,CLK_X+21,CLK_X+22,
//16-30秒
CLK_X+22,CLK_X+21,CLK_X+21,CLK_X+20,CLK_X+19,CLK_X+18,CLK_X+16,CLK_X+14,CLK_X+13,CLK_X+11,
CLK_X+ 9,CLK_X+ 7,CLK_X+ 4,CLK_X+ 2,CLK_X+ 0,
//31-45秒
CLK_X- 2,CLK_X- 4,CLK_X- 7,CLK_X- 9,CLK_X-11,CLK_X-13,CLK_X-14,CLK_X-16,CLK_X-18,CLK_X-19,
CLK_X-20,CLK_X-21,CLK_X-21,CLK_X-21,CLK_X-22,
//46-59秒
CLK_X-22,CLK_X-21,CLK_X-21,CLK_X-20,CLK_X-19,CLK_X-18,CLK_X-16,CLK_X-14,CLK_X-13,CLK_X-11,
CLK_X- 9,CLK_X- 7,CLK_X- 4,CLK_X- 2,

};
uchar code secondpointery[]=//y1
{
//0-15秒
CLK_Y-22,CLK_Y-22,CLK_Y-21,CLK_Y-21,CLK_Y-20,CLK_Y-19,CLK_Y-18,CLK_Y-16,CLK_Y-14,CLK_Y-13,
CLK_Y-11,CLK_Y- 9,CLK_Y- 7,CLK_Y- 4,CLK_Y- 2,CLK_Y- 0,
//16-30秒
CLK_Y+ 2,CLK_Y+ 4,CLK_Y+ 7,CLK_Y+ 9,CLK_Y+11,CLK_Y+13,CLK_Y+14,CLK_Y+16,CLK_Y+18,CLK_Y+19,
CLK_Y+20,CLK_Y+21,CLK_Y+21,CLK_Y+22,CLK_Y+22,
//31-45秒
CLK_Y+22,CLK_Y+21,CLK_Y+21,CLK_Y+20,CLK_Y+19,CLK_Y+18,CLK_Y+16,CLK_Y+14,CLK_Y+13,CLK_Y+11,
CLK_Y+ 9,CLK_Y+ 7,CLK_Y+ 4,CLK_Y+ 2,CLK_Y+ 0,
//46-59秒
CLK_Y- 2,CLK_Y- 4,CLK_Y- 7,CLK_Y- 9,CLK_Y-11,CLK_Y-13,CLK_Y-14,CLK_Y-16,CLK_Y-18,CLK_Y-19,
CLK_Y-20,CLK_Y-21,CLK_Y-21,CLK_Y-22,

};

//分针结束点坐标，起点坐标(x0,y0)=(31，31);
uchar code minpointerx[]=//x1
{
//0-15分
CLK_X+ 0,CLK_X+ 2,CLK_X+ 4,CLK_X+ 6,CLK_X+ 8,CLK_X+ 9,CLK_X+11,CLK_X+12,CLK_X+14,CLK_X+15,
CLK_X+16,CLK_X+17,CLK_X+18,CLK_X+19,CLK_X+20,CLK_X+20,
//16-30分
CLK_X+20,CLK_X+19,CLK_X+18,CLK_X+17,CLK_X+16,CLK_X+15,CLK_X+14,CLK_X+12,CLK_X+11,CLK_X+ 9,
CLK_X+ 8,CLK_X+ 6,CLK_X+ 4,CLK_X+ 2,CLK_X+ 0,
//31-45分
CLK_X- 2,CLK_X- 4,CLK_X- 6,CLK_X- 8,CLK_X- 9,CLK_X-11,CLK_X-12,CLK_X-14,CLK_X-15,CLK_X-16,
CLK_X-17,CLK_X-18,CLK_X-19,CLK_X-20,CLK_X-20,
//46-59分
CLK_X-20,CLK_X-19,CLK_X-18,CLK_X-17,CLK_X-16,CLK_X-15,CLK_X-14,CLK_X-12,CLK_X-11,CLK_X- 9,
CLK_X- 8,CLK_X- 6,CLK_X- 4,CLK_X- 2,
};
uchar code minpointery[]=//y1
{
//0-15分
CLK_Y-20,CLK_Y-20,CLK_Y-19,CLK_Y-18,CLK_Y-17,CLK_Y-16,CLK_Y-15,CLK_Y-14,CLK_Y-12,CLK_Y-11,
CLK_Y- 9,CLK_Y- 8,CLK_Y- 6,CLK_Y- 4,CLK_Y- 2,CLK_Y- 0,
//16-30分
CLK_Y+ 2,CLK_Y+ 4,CLK_Y+ 6,CLK_Y+ 8,CLK_Y+ 9,CLK_Y+11,CLK_Y+12,CLK_Y+14,CLK_Y+15,CLK_Y+16,
CLK_Y+17,CLK_Y+18,CLK_Y+19,CLK_Y+20,CLK_Y+20,
//31-45分
CLK_Y+20,CLK_Y+19,CLK_Y+18,CLK_Y+17,CLK_Y+16,CLK_Y+15,CLK_Y+14,CLK_Y+12,CLK_Y+11,CLK_Y+ 9,
CLK_Y+ 8,CLK_Y+ 6,CLK_Y+ 4,CLK_Y+ 2,CLK_Y+ 0,
//46-59分
CLK_Y- 2,CLK_Y- 4,CLK_Y- 6,CLK_Y- 8,CLK_Y- 9,CLK_Y-11,CLK_Y-12,CLK_Y-14,CLK_Y-15,CLK_Y-16,
CLK_Y-17,CLK_Y-18,CLK_Y-19,CLK_Y-20,
};

//时针结束点坐标，起点坐标(x0,y0)=(31，31);

uchar code hourpointerx[]=//x1
{
CLK_X+ 0,CLK_X+ 1,CLK_X+ 3,CLK_X+ 5,CLK_X+ 6,CLK_X+ 8,CLK_X+ 9,CLK_X+11,CLK_X+12,CLK_X+13,
CLK_X+14,CLK_X+14,CLK_X+15,CLK_X+16,CLK_X+16,CLK_X+16,

CLK_X+16,CLK_X+16,CLK_X+15,CLK_X+14,CLK_X+14,CLK_X+13,CLK_X+12,CLK_X+11,CLK_X+ 9,CLK_X+ 8,
CLK_X+ 6,CLK_X+ 5,CLK_X+ 3,CLK_X+ 1,CLK_X+ 0,

CLK_X- 1,CLK_X- 3,CLK_X- 5,CLK_X- 6,CLK_X- 8,CLK_X- 9,CLK_X-11,CLK_X-12,CLK_X-13,CLK_X-14,
CLK_X-14,CLK_X-15,CLK_X-16,CLK_X-16,CLK_X-16,

CLK_X-16,CLK_X-16,CLK_X-15,CLK_X-14,CLK_X-14,CLK_X-13,CLK_X-12,CLK_X-11,CLK_X- 9,CLK_X- 8,
CLK_X- 6,CLK_X- 5,CLK_X- 3,CLK_X- 1,

};
uchar code hourpointery[]=//y1
{
CLK_Y-16,CLK_Y-16,CLK_Y-16,CLK_Y-15,CLK_Y-14,CLK_Y-14,CLK_Y-13,CLK_Y-12,CLK_Y-11,CLK_Y- 9,
CLK_Y- 8,CLK_Y- 6,CLK_Y- 5,CLK_Y- 3,CLK_Y- 1,CLK_Y- 0,

CLK_Y+1,CLK_Y+ 3,CLK_Y+ 5,CLK_Y+ 6,CLK_Y+ 8,CLK_Y+ 9,CLK_Y+11,CLK_Y+12,CLK_Y+13,CLK_Y+14,
CLK_Y+14,CLK_Y+15,CLK_Y+16,CLK_Y+16,CLK_Y+16,

CLK_Y+16,CLK_Y+16,CLK_Y+15,CLK_Y+14,CLK_Y+14,CLK_Y+13,CLK_Y+12,CLK_Y+11,CLK_Y+ 9,
CLK_Y+ 8,CLK_Y+ 6,CLK_Y+ 5,CLK_Y+ 3,CLK_Y+ 1,CLK_Y+ 0,

CLK_Y-1,CLK_Y- 3,CLK_Y- 5,CLK_Y- 6,CLK_Y- 8,CLK_Y- 9,CLK_Y-11,CLK_Y-12,CLK_Y-13,CLK_Y-14,
CLK_Y-14,CLK_Y-15,CLK_Y-16,CLK_Y-16,
};
uchar code clkbmp[]=//时钟图
{
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0xC0,0x60,0x20,0x30,
0x38,0xC8,0x0C,0x04,0x04,0x06,0x02,0x02,0x02,0x03,0x01,0x01,0x21,0xF1,0x01,0x07,
0x21,0x91,0x51,0x21,0x01,0x03,0x02,0x02,0x02,0x06,0x04,0x04,0x0C,0xC8,0x38,0x30,
0x20,0x60,0xC0,0x80,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x80,0xE0,0x30,0x1C,0x06,0x03,0x01,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x01,0x01,0x00,
0x01,0x01,0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x01,0x03,0x06,0x1C,0x30,0xE0,0x80,0x00,0x00,0x00,0x00,0x00,
0x00,0xE0,0x3C,0x07,0x01,0x01,0x02,0x02,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x04,0x02,0x02,0x01,0x01,0x07,0x3C,0xE0,0x00,0x00,
0xFE,0x83,0x80,0x00,0x40,0xA0,0xA0,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0xE0,0xE0,
0xE0,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xA0,0xA0,0x40,0x00,0x80,0x83,0xFE,0x00,
0x3F,0xE0,0x00,0x00,0x00,0x02,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x03,0x03,
0x03,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x02,0x01,0x00,0x00,0xE0,0x3F,0x00,
0x00,0x03,0x1E,0x70,0xC0,0xC0,0x20,0x20,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x10,0x20,0x20,0xC0,0xC0,0x70,0x1E,0x03,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x03,0x06,0x1C,0x30,0x60,0xC0,0x80,0x80,0x00,0x00,0x00,
0x00,0x80,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x40,
0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x40,0x80,0x00,0x00,
0x00,0x00,0x80,0x80,0xC0,0x60,0x30,0x1C,0x06,0x03,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x03,0x02,0x06,
0x0E,0x09,0x18,0x10,0x10,0x30,0x20,0x20,0x20,0x60,0x40,0x40,0x40,0x40,0x43,0x75,
0x45,0x42,0x40,0x40,0x40,0x60,0x20,0x20,0x20,0x30,0x10,0x10,0x18,0x09,0x0E,0x06,
0x02,0x03,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

void WriteClkBmp(uchar code *image) //送一幅64x64点阵图像到显存
{
uchar i,j;
for(j=0;j<8;j++)
{
for(i=64;i<128;i++)
dispbuf[j][i] = image[j*64+i-64];
}
}
void TimeDisp(uchar hour,uchar min,uchar sec)
{
uchar hp;
hp = hour*5+min/12;
WriteClkBmp(clkbmp);
Line(CLK_X,31,secondpointerx[sec],secondpointery[sec]);//秒针
Line(CLK_X,31,minpointerx[min],minpointery[min]);//分针
Line(CLK_X,31,hourpointerx[hp],hourpointery[hp]);//时针
}