实验十五 点阵LCD液晶显示屏实验.docx
实验十五点阵LCD液晶显示屏实验一、实验目的：学习获取字模的方法；学习122X32A液晶LCD的原理及编程方法；二、实验内容：在LCD上显示字样。三、实验器材：1、单片机综合实验仪 1 台2、KEIL仿真器1台3、连线若干根4、计算机1台四、工作原理：1、我们选用的122X32A点阵式液晶LCD，是内置SED1520液晶显示控制器 的屏，它集行、列驱动器和控制器于一体，被广泛应用于小规模液晶显示模块中。SED1520 内置2560位显示RAM区，RAM中的1位数据控制液晶屏上一个象素的亮、暗，“1”为亮，“0” 为暗。它具有16个行驱动输出和61个列驱动输出，可以直接与80系列或68系列的CPU 相连，驱动占空比为1/32，显示内容：122X32点。2、122X32A点阵式液晶LCD电路图：122X16DOTS2o o1122X16DOTS16153、极限参数:引脚歹Zyczi符号电平说明1VDD5. 0V电源电压2GND0V接地（GND）3V0可调LCD驱动电压（对比度调节）4/RESH/L复位信号5E1H，HL片使能信号16E2H，HL片使能信号27R/WH/LH：读；L：写8A0H/LH：数据；L：指令9DB0H/L数据位010DB1H/L数据位111DB2H/L数据位212DB3H/L数据位313DB4H/L数据位414DB5H/L数据位515DB6H/L数据位616DB7H/L数据位7名称czi符号测试条件标准值单位最小值最大值电源电压v_-v 一Ta=25C06. 5VLCD驱动电压DD CCV -v012. 0V输入电压DD0V0V V4、电参数:名称czi 符号测试条件标准值单位最小值典型值最大值电压逻辑V -V-4. 755. 05. 25VLCDDDSSV -V-4. 55. 56. 5V电流逻辑DD0I-2. 5-mALCDDDI-2. 0-mALCD工作电压EEVdd-V00C-6. 2-V25 C-5. 5-v（推荐彳首）40 C-4. 8-v输入电压高电平v高电平0. 7V-Vv低电平IHV低电平DD0-DD0. 3Vddv5、Read/Write Timing for the 80-port MPU(Ta=0 to 75°C,Vss=.0V 0%)A0, /CS/WR, /RDD0 - D7 (WRITE)D0 - D7(READ)ParameterSignalSymbolConditionRatingUnitMinTypeMaxAddress hold timeA0,t10-nsAddress set-up time/CSAH8t20-nsSystem cycle time/WR,AW8 t1000-nsControl pulse width/RDcyc8tcc200-nsData Set-up timet80-nsData hold timeD0-D7DS8t10-nsRD access timeDH8 tCL=100PF-90nsOutput disable timeACC8t10-60nsThe ratings when Vss=.0V are approximately 100% higher than when Vss=.0V.6、Control timimg for 80 - port/68 - port display(Ta = 0 to 7C, Vss = .0V 0 %)CLParameterSignalSymbolConditionRatingUnitMinTypeMaxLOW pulse widthCLt35-nsHIGH pulse widthWLCLt35-nsRising timeWHCLt-30150nsFalling timeR t-30150nsFR delay timeFRFtDFRInput timing-2.00.22.0nsOuput timingCl=100pf-0.20.4ns7、指令功能：SED1520有13条指令，从作用上可分为两大类：一类为显示方式的设置 指令，前6条指令为这一类指令，它们只需在初始化程序中写入一次即可。另一类为显示数 据读/写操作的指令，从第7条往下（包括读状态字）都是这类指令。CommandRDWRA0D7D6D5D4D3D2D1D01Display ON/OFF10010101110/12Display START Line100110Display START address(0-31)3Page Address Set100101110Page(0-3)4Column(Segment)Address Set1000Column address (0-79)5Status Read010BUSYACCON/OFFRET00006Write Display Data101Write Data7Read Display Data011Read Data8ADC Select10010100000/19Static Drive ON/OFF10010100100/110Duty Select10010101000/111Read Modify Write1001110000012End1001110111013Reset10011100010COM1: Switches the entire display ON or OFF,regardless of the Display RAM dataFR>C一or the internal status*COM2： Determines the line of RAM data to be displayed at the display top lineCOM3： Sets the page of the Display RAM in the page address registerCOM4： Sets the column address of the Display RAM in the column address registerCOM5： Reads the statusBUSY 1: Busy(internal processing) 0: READY statusADC1:Rightward(forward)output0:leftward(reverse)outputON/OFF 1: Display OFF0: Display ONRET1:Resetting0:NormalCOM6：Writes thedata on the databusto RAMCOM7：Reads datafrom the DisplayRAMontothedata busCOM8： Used to reverse the correspondence between the Display RAM column address and segment driver output ports0: Rightward(forward)output 1: leftward(reverse)outputCOM9: Selects normal display operation or static all-lit drive displayoperation.1: Static drive(Power Save)*0: Normal display operationCOM10： Selects the duty factor for driving LCD cells1: 1/32 duty0: 1/16 dutyCOM11: Increments the column address counter by one only when display data written but not when it is read.COM12： Cancels the Ready Modify Write ModeCOM13： Resets the Display START line to the 1st line in the register.Resets the column address counter to 0 and page address register to 3五、接线方案：调用显示“品”字子程IlIlTIInRSl £/T1. 口口口口皿皿JZIJnm V & V.I.J EERAkKRkKRkKLCD显示子程序:LCD液晶显示清屏子程序:七、实验步骤：1、设定仿真模式为程序空间在仿真器上，数据空间在用户板上。2、系统分配给 LCD 的地址为：0FA00H-0FBFFH，0F800H-0F9FFH3、设计称序并执行，观察结果。八、思考问题：1、显示“思考问题”字样。2、修改程序，使其上、下、左、右移动。九、实验连线：无连线。十、实验程序：；中文LCD,参阅书.显示字符#include reg51.h#include "absacc.h”#include "intrins.h”#define PD1 61/* 122/2 分成左右两半屏(122x32) */unsigned char Column;unsigned char Page_ ;/* 页地址寄存器 D1,DO:页地址 */unsigned char Code_ ;/* 字符代码寄存器 */unsigned char Command; /* 指令寄存器 */unsigned char LCDData; /* 数据寄 存器 */#define CWADD1#define DWADD1#define CRADD1#define DRADD1XBYTEXBYTEXBYTEXBYTE_0xfa00_0xfa40_0xfa80_0xfac0_/*写指令代码地址(E1) */*写显示数据地址(E1) */*读状态字地址(E1) */*读显示数据地址(E1) */#define#define#define#define#defineCWADD2DWADD2CRADD2DRADD2XBYTEXBYTEXBYTEXBYTEPxf800Pxf8400xf880_0xf8c0_Nop() _nop_ ();/*写指令代码地址(E/2/*写显示数进地址(E/*读状态字地址(E2/*读显示数据地址(E2nop_ (); _nop_ (); _nop_ (); _nop()/*中文字模库16x16点阵*/unsigned char code CCTAB32 = /* 点阵：16x16提取点阵方向：纵向字节掉转：是字节方式：C语言*/0x20,0x20,0x24,0x24,0x24,0xE4,0x26,0x24,/0x20,0xFF,0x20,0x22,0x2C,0x20,0x20,0x00,0x20,0x60,0x3F,0x20,0x20,0x1F,0x11,0x11,0x10,0x03,0x1C,0x20,0x40,0x80,0xE0,0x00,0x10,0x22,0x64,0x0C,0x80,0x04,0x74,0x84,/0x04,0x04,0x04,0xC4,0x3E,0x04,0x00,0x00,0x04,0x04,0x7E,0x01,0x80,0x40,0x20,0x11,0x0A,0x04,0x0B,0x10,0x60,0xC0,0x40,0x00,0x80,0x70,0x00,0xFF,0x10,0x22,0xF2,0x92,/0x92,0x92,0x92,0x92,0xFB,0x12,0x00,0x00,0x00,0x00,0x00,0xFF,0x20,0x20,0x27,0x24,0x24,0x24,0x24,0x24,0x27,0x30,0x20,0x00,0x24,0x24,0x24,0xA4,0xFE,0xA3,0x22,0x00,/0x24,0x48,0x00,0xFF,0x00,0x80,0x00,0x00,0x10,0x08,0x06,0x01,0xFF,0x00,0x01,0x02,0x02,0x02,0x02,0xFF,0x01,0x01,0x01,0x00,0x00,0xF8,0x48,0x48,0x48,0x48,0xFF,0x48,/0x48,0x48,0x48,0xFC,0x08,0x00,0x00,0x00,0x00,0x07,0x02,0x02,0x02,0x02,0x3F,0x42,0x42,0x42,0x42,0x47,0x40,0x70,0x00,0x00,0x80,0x80,0x82,0x82,0x82,0x82,0x82,0xE2,/0xA2,0x92,0x8A,0x86,0x80,0xC0,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x40,0x80,0x7F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x20,0x24,0x24,0xA4,0xFF,0xA4,0xB4,0xAC,/0x20,0x9F,0x10,0x10,0xF0,0x18,0x10,0x00,0x02,0x12,0x51,0x90,0x7E,0x0A,0x89,0x40,0x20,0x1B,0x04,0x1B,0x60,0xC0,0x40,0x00,0x80,0x40,0x20,0xF8,0x07,0x00,0x38,0xC0,/0x02,0x04,0x0C,0x80,0x60,0x1C,0x00,0x00,0x00,0x00,0x00,0xFF,0x80,0x40,0x20,0x10,0x0B,0x04,0x0A,0x11,0x60,0xC0,0x40,0x00,；/* 1.写指令代码子程序(E1) */void WriteCommandE1()一/while(IN(CRADD1) & 0x80);/实际的液晶操作中可以不判断是否忙CWADD1=Command;_Nop();/* 2.写显示数据子程序(E1) */void WriteDataE1()/while(IN(CRADD1) & 0x80);DWADD1=LCDData;_Nop();/* 4.写指令代码子程序(E2) */void WriteCommandE2()/while(IN(CRADD2) & 0x80);CWADD2=Command;_Nop();/* 5.写显示数据子程序(E2) */ void WriteDataE2() /while(IN(CRADD2) & 0x80);DWADD2=LCDData;_Nop(); /*初始化程序*/void Init()Command = 0xe2;WriteCommandE1();WriteCommandE2();Command = 0xa4;WriteCommandE1();WriteCommandE2();Command = 0xa9;WriteCommandE1();WriteCommandE2();Command = 0xa0;WriteCommandE1();WriteCommandE2();Command = 0xc0;WriteCommandE1();WriteCommandE2();Command = 0xaf;WriteCommandE1();WriteCommandE2();/*清屏*/void Clear()unsigned char i,j;i = 0;do Command = (i + 0xb8);/* 页地址设置 */WriteCommandE1();WriteCommandE2();Command = 0x00;/* 列地址设置为"0" */WriteCommandE1();WriteCommandE2();j = 0x50;/* 一页清80个字节*/do LCDData = 0x00;/* 显示数据为"0" */WriteDataE1();WriteDataE2();while(-j !=0);/*页内字节清零循环*/while(+i !=4);/*页地址暂存器加一 */*显示区清零循环*/*延时函数*/void delay()unsigned int i;for(i=0;i<=5000;i+);/*中文显示子程序*/void WriteCHN16x16()unsigned char i,j,k;i = 0;j = 0;while(j<2) Command = (Page_ + j) & 0x03)WriteCommandE1();WriteCommandE2();k = Column;while(k < Column + 16)if (k < PD1) Command = k;WriteCommandE1();LCDData = CCTABCode_i;WriteDataE1(); elseCommand = k-PD1;WriteCommandE2();LCDData = CCTABCode WriteDataE2();i+;if( +k >= PD1 * 2) break;j+;char code dx5163 _at_ 0x003b;/* 中文显示程序 */void main()Init();Clear();while(1)Clear();Page_ = 0x02;Column = 0x20;Code_ = 0x00;WriteCHN16x16();| 0xb8;/*设置页地址*/*列地址值*/*为左半屏显示区域(E1) */*设置列地址值*/*取汉字字模数据*/*写字模数据J/*为右半屏显示区域(E2) */*设置列地址值*/i; /*取汉字字模数据*/*写字模数据*/*列地址是否超出显示范围*/Page_ = 0x02;Column = 0x30;Code_ = 0x01;WriteCHN16x16();Page_ = 0x02;Column = 0x40;Code_ = 0x02;WriteCHN16x16();Page_ = 0x02;Column = 0x50;Code_ = 0x03;WriteCHN16x16();Page_ = 0x00;Column = 0x20;Code_ = 0x04;WriteCHN16x16();Page_ = 0x00;Column = 0x30;Code_ = 0x05;WriteCHN16x16();Page_ = 0x00;Column = 0x40;Code_ = 0x06;WriteCHN16x16();Page_ = 0x00;Column = 0x50;Code_ = 0x07;WriteCHN16x16();delay();
