求助大佬，我屏幕不正常工作。

6668*** · 发表于 2023-5-29 08:44:42

有没有大佬知道，怎样让这块屏幕正常工作，是在屠龙刀上用的，屏幕的规格书我也放下面了，我试了几次，屏幕是亮了，但没显示任何字符，我是新手，还请各位大佬帮帮忙，

乘风*** · 发表于 2023-5-29 09:22:44

实验箱上有这种屏的接口，屠龙刀板子需要飞线，可以参考实验箱对应接口进行飞线测试：

6668*** · 发表于 2023-5-29 09:41:08

好的，谢谢，等下班了，我回家继续试试。

ang*** · 发表于 2023-5-29 10:13:08

你这个屏幕是ST7920驱动的。

/*---------------------------------------------------------------------*/
/* --- STC MCU Limited ------------------------------------------------*/
/* --- STC 1T Series MCU Demo Programme -------------------------------*/
/* --- Mobile: (86)13922805190 ----------------------------------------*/
/* --- Fax: 86-0513-55012956,55012947,55012969 ------------------------*/
/* --- Tel: 86-0513-55012928,55012929,55012966 ------------------------*/
/* --- Web: www.STCAI.com ---------------------------------------------*/
/* --- Web: www.STCMCUDATA.com  ---------------------------------------*/
/* --- BBS: www.STCAIMCU.com  -----------------------------------------*/
/* --- QQ:  800003751 -------------------------------------------------*/
/* 如果要在程序中使用此代码,请在程序中注明使用了STC的资料及程序        */
/*---------------------------------------------------------------------*/


/*************  功能说明    **************

本例程基于STC8H8K64U为主控芯片的实验箱9进行编写测试，STC8G、STC8H系列芯片可通用参考.

128*64的LCD显示程序

显示图形，汉字，英文，数字

下载时, 选择时钟 24MHz (用户可自行修改频率).

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


#include "stc8h.h"       //包含此头文件后，不需要再包含"reg51.h"头文件
#include "intrins.h"

#define     MAIN_Fosc       24000000L   //定义主时钟

typedef     unsigned char   u8;
typedef     unsigned int    u16;
typedef     unsigned long   u32;


sbit    LCD_RS = P4^5;  //定义引脚
sbit    LCD_RW = P4^2;
sbit    LCD_E  = P4^4;
sbit    PSB    = P3^5;      //PSB脚为12864的串、并通讯功能切换，我们使用8位并行接口，PSB=1
sbit    LCD_RESET   =   P3^4;   //  17---RESET  L-->Enable
#define LCD_Data P6


#define Busy    0x80 //用于检测LCD状态字中的Busy标识
void    delay_ms(u16 ms);
void    WriteDataLCD(u8 WDLCD);
void    WriteCommandLCD(u8 WCLCD,BuysC);
u8      ReadDataLCD(void);
u8      ReadStatusLCD(void);
void    LCDInit(void);
void    LCDClear(void);
void    LCDFlash(void);
void    DisplayOneChar(u8 X, u8 Y, u8 DData);
void    DisplayListChar(u8 X, u8 Y, u8 code *DData);
void    DisplayImage (u8 code *DData);

u8  code uctech[] = {"南通国芯微电子  "};
u8  code net[]    = {" stcmcudata.com "};
u8  code mcu[]    = {"专业制造51单片机"};
u8  code qq[]     = {" QQ: 800003751  "};

    //128*64点阵图形数据
code u8 gImage_gxw[1024] = { /* 0X10,0X01,0X00,0X80,0X00,0X40, */
0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
0X00,0X3F,0X03,0XF0,0X3F,0X03,0XF0,0X00,0X00,0X00,0X0C,0X00,0X00,0X00,0XC0,0X00,
0X00,0X21,0X02,0X10,0X21,0X02,0X10,0X00,0X00,0X00,0X0C,0X00,0X18,0XFF,0XE0,0X00,
0X00,0X21,0X02,0X10,0X21,0X02,0X10,0X00,0X00,0X00,0X08,0X1C,0X1C,0X1B,0X00,0X00,
0X00,0X21,0X02,0X10,0X21,0X02,0X10,0X00,0X00,0X1F,0XFF,0XFE,0X0C,0X0E,0X00,0X00,
0X00,0X21,0X02,0X10,0X21,0X02,0X10,0X00,0X00,0X00,0X0C,0X00,0X00,0X8C,0X60,0X00,
0X00,0X21,0X02,0X10,0X21,0X02,0X10,0X00,0X00,0X04,0X0C,0X10,0X00,0XFF,0XF0,0X00,
0X00,0X21,0X02,0X10,0X21,0X02,0X10,0X00,0X00,0X07,0XFF,0XF8,0X0C,0XCC,0X60,0X00,
0X00,0X21,0X02,0X10,0X21,0X02,0X10,0X00,0X00,0X06,0X63,0X18,0X7E,0XCC,0X60,0X00,
0X7F,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XF8,0X00,0X06,0X33,0X98,0X0C,0XFF,0XE0,0X00,
0X7F,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XF8,0X00,0X06,0X32,0X18,0X0C,0XCC,0X60,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X06,0X05,0XD8,0X0C,0XCC,0X60,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X06,0XFF,0X78,0X0C,0XFF,0XE0,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X06,0X08,0XD8,0X0C,0XCC,0X60,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X07,0XFF,0XF8,0X0C,0XCC,0X60,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X06,0X0C,0X18,0X0C,0XCF,0XE0,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X06,0X0C,0X18,0X3E,0X80,0X40,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X06,0X0C,0X18,0X73,0XC0,0X00,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X06,0X0D,0XF0,0X20,0X7F,0XF8,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X06,0X00,0X30,0X00,0X00,0X00,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X06,0X00,0X18,0X01,0X84,0X00,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X07,0XFF,0XFC,0X01,0XC6,0X00,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X06,0X00,0X58,0X01,0X86,0X30,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X07,0XFF,0XD8,0X7F,0XFF,0XF8,0X00,
0X60,0X00,0XFD,0X1F,0XF0,0X7A,0X00,0X18,0X00,0X06,0X0C,0X18,0X01,0X86,0X00,0X00,
0X60,0X01,0X87,0X13,0X30,0XC6,0X00,0X18,0X00,0X06,0X0C,0X18,0X01,0X86,0X00,0X00,
0X60,0X03,0X03,0X33,0X11,0X83,0X00,0X18,0X00,0X06,0X0C,0X18,0X00,0X40,0X00,0X00,
0X60,0X03,0X03,0X03,0X01,0X83,0X00,0X18,0X00,0X06,0X0C,0XD8,0X00,0X30,0X00,0X00,
0X60,0X03,0X80,0X03,0X03,0X80,0X00,0X18,0X00,0X06,0XFF,0XF8,0X03,0X38,0X00,0X00,
0X60,0X01,0XC0,0X03,0X03,0X00,0X00,0X18,0X00,0X06,0X0F,0X18,0X0B,0X98,0X80,0X00,
0X60,0X00,0X78,0X03,0X03,0X00,0X00,0X18,0X00,0X06,0X0D,0X98,0X0B,0X18,0XC0,0X00,
0X60,0X00,0X1E,0X03,0X03,0X00,0X00,0X18,0X00,0X06,0X0C,0XD8,0X1B,0X00,0X70,0X00,
0X60,0X00,0X07,0X03,0X03,0X00,0X00,0X18,0X00,0X06,0X0C,0X18,0X1B,0X01,0X30,0X00,
0X60,0X00,0X03,0X03,0X03,0X80,0X00,0X18,0X00,0X06,0X0C,0XD8,0X3B,0X01,0X30,0X00,
0X60,0X03,0X03,0X03,0X03,0X83,0X00,0X18,0X00,0X07,0XF7,0XB8,0X33,0X01,0X80,0X00,
0X60,0X03,0X03,0X03,0X01,0X82,0X00,0X18,0X00,0X06,0X00,0X18,0X03,0X01,0X80,0X00,
0X60,0X01,0XC6,0X03,0X01,0XC6,0X00,0X18,0X00,0X07,0XFF,0XF8,0X01,0XFF,0X80,0X00,
0X60,0X01,0X7C,0X07,0XC0,0X7C,0X00,0X18,0X00,0X06,0X00,0X18,0X00,0X00,0X00,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X04,0X00,0X00,0X00,0X00,0X00,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X21,0X86,0X00,0X07,0X00,0X00,0X00,0X10,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X31,0X86,0X00,0X07,0X00,0X03,0XFF,0XF8,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X65,0X66,0X00,0X02,0X00,0X00,0X00,0X68,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0XC7,0X7C,0X00,0X02,0X08,0X00,0X00,0XC0,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X95,0X6C,0X41,0XFF,0XFC,0X00,0X03,0X80,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X19,0X3D,0X6F,0XE1,0X82,0X0C,0X00,0X0E,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X3E,0XE9,0XA1,0X82,0X0C,0X00,0X0E,0X00,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X60,0X59,0X81,0X82,0X0C,0X00,0X0C,0X0C,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0X6F,0XFD,0X81,0XFF,0XFC,0X1F,0XFF,0XFE,
0X60,0X00,0X00,0X00,0X00,0X00,0X00,0X18,0XE0,0X15,0X81,0X82,0X0C,0X00,0X0C,0X02,
0X7F,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XF8,0XA6,0X45,0X81,0X82,0X0C,0X00,0X0C,0X00,
0X7F,0XFF,0XFF,0XFF,0XFF,0XFF,0XFF,0XF9,0X27,0XC7,0X01,0X82,0X0C,0X00,0X0C,0X00,
0X00,0X21,0X02,0X10,0X21,0X02,0X10,0X00,0X26,0X47,0X01,0XFF,0XFC,0X00,0X0C,0X00,
0X00,0X21,0X02,0X10,0X21,0X02,0X10,0X00,0X26,0X5F,0X01,0X82,0X0B,0X00,0X0C,0X00,
0X00,0X21,0X02,0X10,0X21,0X02,0X10,0X00,0X26,0X77,0X01,0X02,0X03,0X00,0X0C,0X00,
0X00,0X21,0X02,0X10,0X21,0X02,0X10,0X00,0X26,0XEF,0X80,0X02,0X03,0X00,0X0C,0X00,
0X00,0X21,0X02,0X10,0X21,0X02,0X10,0X00,0X24,0X59,0XC0,0X02,0X03,0X00,0X0C,0X00,
0X00,0X21,0X02,0X10,0X21,0X02,0X10,0X00,0X38,0X30,0XE0,0X03,0XFF,0X80,0X7C,0X00,
0X00,0X21,0X02,0X10,0X21,0X02,0X10,0X00,0X38,0XE0,0X00,0X00,0X00,0X00,0X18,0X00,
0X00,0X3F,0X03,0XF0,0X3F,0X03,0XF0,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
};


void main(void)
{
    P_SW2 |= 0x80;  //扩展寄存器(XFR)访问使能

    P0M1 = 0x30;   P0M0 = 0x30;   //设置P0.4、P0.5为漏极开路(实验箱加了上拉电阻到3.3V)
    P1M1 = 0x30;   P1M0 = 0x30;   //设置P1.4、P1.5为漏极开路(实验箱加了上拉电阻到3.3V)
    P2M1 = 0x3c;   P2M0 = 0x3c;   //设置P2.2~P2.5为漏极开路(实验箱加了上拉电阻到3.3V)
    P3M1 = 0x50;   P3M0 = 0x50;   //设置P3.4、P3.6为漏极开路(实验箱加了上拉电阻到3.3V)
    P4M1 = 0x00;   P4M0 = 0x00;   //设置为准双向口
    P5M1 = 0x0c;   P5M0 = 0x0c;   //设置P5.2、P5.3为漏极开路(实验箱加了上拉电阻到3.3V)
    P6M1 = 0xff;   P6M0 = 0xff;   //设置为漏极开路(实验箱加了上拉电阻到3.3V)
    P7M1 = 0x00;   P7M0 = 0x00;   //设置为准双向口

    delay_ms(100); //启动等待，等LCD讲入工作状态
    LCDInit(); //LCM初始化
    delay_ms(5); //延时片刻(可不要)
    while(1)
    {
        LCDClear();
        DisplayImage(gImage_gxw);//显示图形
        delay_ms(5000);
        LCDClear();
        DisplayListChar(0,1,uctech);    //显示字库中的中文数字
        DisplayListChar(0,2,net);       //显示字库中的中文数字
        DisplayListChar(0,3,mcu);       //显示字库中的中文
        DisplayListChar(0,4,qq);        //显示字库中的中文数字
        delay_ms(5000);
    }
}


//========================================================================
// 函数: void delay_ms(u8 ms)
// 描述: 延时函数。
// 参数: ms,要延时的ms数, 这里只支持1~255ms. 自动适应主时钟.
// 返回: none.
// 版本: VER1.0
// 日期: 2013-4-1
// 备注: 
//========================================================================
void delay_ms(u16 ms)
{
     u16 i;
     do{
          i = MAIN_Fosc / 10000;
          while(--i)    ;   //10T per loop
     }while(--ms);
}


//******************************************
void LCD_delay(void)
{
    _nop_();
    _nop_();
    _nop_();
    _nop_();
    _nop_();
    _nop_();
    _nop_();
    _nop_();
    _nop_();
    _nop_();
}


//写数据
void WriteDataLCD(u8 WDLCD)
{
    ReadStatusLCD(); //检测忙 
    LCD_RS = 1;
    LCD_RW = 0;
    LCD_Data = WDLCD;
    LCD_delay();
    LCD_E = 1;
    LCD_delay();
    LCD_E = 0;
}

//写指令
void WriteCommandLCD(u8 WCLCD,BuysC) //BuysC为0时忽略忙检测
{
    if (BuysC) ReadStatusLCD(); //根据需要检测忙 
    LCD_RS = 0;
    LCD_RW = 0; 
    LCD_Data = WCLCD;
    LCD_delay();
    LCD_E = 1; 
    LCD_delay();
    LCD_E = 0;  
}

//读状态
u8 ReadStatusLCD(void)
{
    LCD_Data = 0xFF; 
    LCD_RS = 0;
    LCD_RW = 1; 
    LCD_delay();
    LCD_E = 1;
    LCD_delay();
    while (LCD_Data & Busy); //检测忙信号
    LCD_E = 0;
    return(LCD_Data);
}

void LCDInit(void) //LCM初始化
{
//  PSB = 1;    //并口
//  PSB = 0;    //SPI口
    delay_ms(10);
    LCD_RESET = 0;
    delay_ms(10);
    LCD_RESET = 1;
    delay_ms(100);
    
    WriteCommandLCD(0x30,1); //显示模式设置,开始要求每次检测忙信号
    WriteCommandLCD(0x01,1); //显示清屏
    WriteCommandLCD(0x06,1); // 显示光标移动设置
    WriteCommandLCD(0x0C,1); // 显示开及光标设置
}

void LCDClear(void) //清屏
{
    WriteCommandLCD(0x01,1); //显示清屏
    WriteCommandLCD(0x34,1); // 显示光标移动设置
    WriteCommandLCD(0x30,1); // 显示开及光标设置
}


//按指定位置显示一串字符
void DisplayListChar(u8 X, u8 Y, u8 code *DData)
{
    u8 ListLength,X2;
    ListLength = 0;
    X2 = X;
    if(Y < 1)   Y=1;
    if(Y > 4)   Y=4;
    X &= 0x0F; //限制X不能大于16，Y在1-4之内
    switch(Y)
    {
        case 1: X2 |= 0X80; break;  //根据行数来选择相应地址
        case 2: X2 |= 0X90; break;
        case 3: X2 |= 0X88; break;
        case 4: X2 |= 0X98; break;
    }
    WriteCommandLCD(X2, 1); //发送地址码
    while (DData[ListLength] >= 0x20) //若到达字串尾则退出
    {
//        if (X <= 0x0F) //X坐标应小于0xF
        {
            WriteDataLCD(DData[ListLength]); //
            ListLength++;
            X++;
        }
    }
}

//图形显示122*32
void DisplayImage (u8 code *DData)
{
    u8 x,y,i;
    unsigned int tmp=0;
    for(i=0;i<9;)       //分两屏，上半屏和下半屏，因为起始地址不同，需要分开
    {
        for(x=0;x<32;x++)   //32行
        {
            WriteCommandLCD(0x34,1);
            WriteCommandLCD((0x80+x),1);//列地址
            WriteCommandLCD((0x80+i),1);    //行地址，下半屏，即第三行地址0X88
            WriteCommandLCD(0x30,1);        
            for(y=0;y<16;y++)   
                WriteDataLCD(DData[tmp+y]);//读取数据写入LCD
            tmp+=16;        
        }
        i+=8;
    }
    WriteCommandLCD(0x36,1);    //扩充功能设定
    WriteCommandLCD(0x30,1);
}

复制代码

so*** · 发表于 2024-3-13 11:28:52

可调电阻调了吗？出厂默认对比度都很低看不到字

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