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| | 网站首页 | 综合电子 | 51单片机 | AVR单片机 | ARM专栏 | MSP430 | 网上商城 | PSOC | 下载中心 | 公司事项 | DSP专栏 | | ||
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| 使用1602液晶显示的c代码 | |||||
| 使用1602液晶显示的c代码 | |||||
作者：佚名 51单片机来源：本站原创 点击数： 更新时间：2007-10-8  |
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连接线图: --------------------------------------------------- |LCM-----51 | LCM-----51 | LCM------51 | --------------------------------------------------| |DB0-----P1.0 | DB4-----P1.4 | RW-------P2.0 | |DB1-----P1.1 | DB5-----P1.5 | RS-------P2.1 | |DB2-----P1.2 | DB6-----P1.6 | E--------P2.2 | |DB3-----P1.3 | DB7-----P1.7 | VLCD接1K电阻到GND| --------------------------------------------------- [注:AT89S51使用12M晶振] =============================================================*/ #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 ＃i nclude <at89x51.h> 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 uctech[] = {"uctech"}; unsigned char code net[] = {"uctech.icpcn.com"}; void main(void) { 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) DisplayListChar(0, 5, uctech); DisplayListChar(0, 0, net); ReadDataLCM();//测试用句无意义 while(1); } //写数据 void WritEDAtaLCM(unsigned char WDLCM) { ReadStatusLCM(); //检测忙 LCM_Data = WDLCM; LCM_RS = 1; LCM_RW = 0; LCM_E = 0; //若晶振速度太高可以在这后加小的延时 LCM_E = 0; //延时 LCM_E = 1; } //写指令 void WriteCommandLCM(unsigned char WCLCM,BuysC) //BuysC为0时忽略忙检测 { if (BuysC) ReadStatusLCM(); //根据需要检测忙 LCM_Data = WCLCM; LCM_RS = 0; LCM_RW = 0; LCM_E = 0; LCM_E = 0; LCM_E = 1; } //读数据 unsigned char ReadDataLCM(void) { LCM_RS = 1; LCM_RW = 1; LCM_E = 0; LCM_E = 0; LCM_E = 1; return(LCM_Data); } //读状态 unsigned char ReadStatusLCM(void) { LCM_Data = 0xFF; LCM_RS = 0; LCM_RW = 1; LCM_E = 0; LCM_E = 0; LCM_E = 1; while (LCM_Data & Busy); //检测忙信号 return(LCM_Data); } void LCMInit(void) //LCM初始化 { LCM_Data = 0; WriteCommandLCM(0x38,0); //三次显示模式设置，不检测忙信号 Delay5Ms(); WriteCommandLCM(0x38,0); Delay5Ms(); WriteCommandLCM(0x38,0); Delay5Ms(); WriteCommandLCM(0x38,1); //显示模式设置,开始要求每次检测忙信号 WriteCommandLCM(0x08,1); //关闭显示 WriteCommandLCM(0x01,1); //显示清屏 WriteCommandLCM(0x06,1); // 显示光标移动设置 WriteCommandLCM(0x0C,1); // 显示开及光标设置 } //按指定位置显示一个字符 void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData) { Y &= 0x1; X &= 0xF; //限制X不能大于15，Y不能大于1 if (Y) X |= 0x40; //当要显示第二行时地址码+0x40; X |= 0x80; // 算出指令码 WriteCommandLCM(X, 0); //这里不检测忙信号，发送地址码 WritEDAtaLCM(DData); } //按指定位置显示一串字符 void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData) { unsigned char ListLength; ListLength = 0; Y &= 0x1; X &= 0xF; //限制X不能大于15，Y不能大于1 while (DData[ListLength]>0x20) //若到达字串尾则退出 { if (X <= 0xF) //X坐标应小于0xF { DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符 ListLength++; X++; } } } //5ms延时 void Delay5Ms(void) { unsigned int TempCyc = 5552; while(TempCyc--); } //400ms延时 void Delay400Ms(void) { unsigned char TempCycA = 5; unsigned int TempCycB; while(TempCycA--) { TempCycB=7269; while(TempCycB--); }; } |
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