《单片机原理及系统设计实用教程》课件ps2与液晶设计实例

12.4PS2键盘与液晶显示实例 本节主要讲述PS/2键盘与S52单片机连接的方法，以及单片机与12232液晶之间的接口程序的编写。实现的功能是从PS/2中读入数据，并在液晶上面显示出来。12.4.1电路原理图 硬件电路图如图12.20所示图12.20电路原理图 采用最小系统，PS/2和LCD接口都通过插座连接，系统使用4MHZ的晶振。12.4.2程序设计 程序包括两部份，PS/2处理程序和LCD处理程序。PS/2处理程序设计如图9-15中电路所示。PS/2键盘与单片机连数据传送方式为PS/2向单片机发数据，单片机接收数据，从图9-2可以看出每经过11时钟周期单片机接收到一个字节的数据。PS/2键盘的时钟线与单片机的INT0引脚相连，在单片机的中断服务程序中负着进行数据处理，只接收11个时钟周期中的键码信息，而对起始、停止和校验位不处理。LCD处理程序设计LCD与单片机的连接关系如图9-15中电路所示。程序通过模拟LCD的读写时序完成对LCD的操作，LCD的时序如图9-14。LCD在开始显示之前需要对其进行初始化设置，12232的初始化步骤如下（参考程序中的disp.c中的init函数）：控制器复位关闭显示关闭静态驱动，使用动态驱动方式（省电）设置显示首行的位置（STARTLINE）设置Duty（动态驱动占空比）计数器方向设置（ADC）关闭“读－写－修改”模式设置DDRAM地址计数器的位置打开显示通过以上步骤的操作后，LCD就能够正常显示了。整个程序采用模块设计，及相应的功能存放一个c文件中，建立多个c文件。工程上的应用为了便于维护和程序的扩展，大多采用模块化设计。模块化设计的特点是建立多个文件，各模块文件中定义各自的函数，并将被其他文件函数调用函数用头文件提出来并标注“extern”保留字，这样其他文件只要包含（include）该头文件就能够引用该头文件中定义的那些函数。该原理如图9-19所示图9-19多模块开发原理整个程序如下：12.4.3LCD显示程序disp.c#include<AT89X52.H>#include"char.h"#defineucharunsignedchar#defineuintunsignedint#defineDIP2_1#defineRWP2_0#defineE1P2_6#defineE2P2_7unsignedcharcodeenter[]={0x00,0x00,0x80,0xF8,0xF0,0x80,0x00,0x00,0x00,0x38,0x3F,0x3F,0x3F,0x3F,0x38,0x00};unsignedcharcodezero[]={0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x0F,0x10,0x20,0x20,0x10,0x0F,0x00};unsignedcharcodeone[]={0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00};unsignedcharcodetwo[]={0x00,0x70,0x08,0x08,0x08,0x88,0x70,0x00,0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00};unsignedcharcodethree[]={0x00,0x30,0x08,0x88,0x88,0x48,0x30,0x00,0x00,0x18,0x20,0x20,0x20,0x11,0x0E,0x00};unsignedcharcodefour[]={0x00,0x00,0xC0,0x20,0x10,0xF8,0x00,0x00,0x00,0x07,0x04,0x24,0x24,0x3F,0x24,0x00};unsignedcharcodefive[]={0x00,0xF8,0x08,0x88,0x88,0x08,0x08,0x00,0x00,0x19,0x21,0x20,0x20,0x11,0x0E,0x00};unsignedcharcodesix[]={0x00,0xE0,0x10,0x88,0x88,0x18,0x00,0x00,0x00,0x0F,0x11,0x20,0x20,0x11,0x0E,0x00};unsignedcharcodeseven[]={0x00,0x38,0x08,0x08,0xC8,0x38,0x08,0x00,0x00,0x00,0x00,0x3F,0x00,0x00,0x00,0x00};unsignedcharcodeeight[]={0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00};unsignedcharcodenine[]={0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x00,0x31,0x22,0x22,0x11,0x0F,0x00};unsignedcharcodeqing[]={0x40,0x42,0x4C,0xC4,0x00,0x22,0xAA,0xAA,0xAA,0xBF,0xAA,0xAA,0xAA,0x22,0x20,0x00, 0x00,0x00,0x00,0x7F,0x20,0x10,0xFF,0x0A,0x0A,0x0A,0x4A,0x8A,0x7F,0x00,0x00,0x00};/*"请",0*/unsignedcharcodecha[]={0x08,0x08,0x08,0xFF,0x88,0x48,0x92,0x92,0x52,0x12,0xFE,0x11,0x91,0x91,0x90,0x00, 0x02,0x42,0x81,0x7F,0x00,0x00,0x7F,0x24,0x24,0x20,0x3F,0x20,0x24,0x24,0x7F,0x00};/*"插",1*/unsignedcharcodeka[]={0x00,0x40,0x40,0x40,0x40,0x40,0x40,0xFF,0x44,0x44,0x44,0x44,0x44,0x44,0x40,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0x00,0x02,0x04,0x0C,0x38,0x10,0x00,0x00};/*"卡",2*/unsignedcharcodehao[]={0x40,0x40,0x40,0x5F,0xD1,0x51,0x51,0x51,0x51,0x51,0x51,0x5F,0x40,0x40,0x40,0x00, 0x00,0x00,0x00,0x02,0x07,0x02,0x02,0x22,0x42,0x82,0x42,0x3E,0x00,0x00,0x00,0x00};/*"号",0*/unsignedcharcodezhuang[]={0x00,0x42,0x2C,0x24,0x10,0xFF,0x04,0x64,0xA4,0x24,0x3F,0x24,0x24,0x24,0x04,0x00, 0x20,0x21,0x11,0x11,0xF9,0x45,0x23,0x03,0x05,0x09,0x11,0x29,0x45,0xC1,0x41,0x00};/*"装",0*/unsignedcharcodepiao[]={0x00,0x01,0x3D,0xA5,0xA5,0xA5,0xBF,0xA5,0xA5,0xBF,0xA5,0xA5,0xA5,0x3D,0x01,0x00, 0x04,0x44,0x24,0x14,0x04,0x44,0x84,0x7C,0x04,0x04,0x04,0x14,0x24,0x44,0x04,0x00};/*"票",1*/unsignedcharcodezhang[]={0x00,0xF8,0x08,0xFF,0x08,0xF8,0x80,0x80,0xFF,0xA0,0x90,0x98,0x8C,0x88,0x80,0x00, 0x00,0x07,0x00,0xFF,0x04,0x07,0x00,0x40,0xFF,0x40,0x23,0x0C,0x10,0x60,0x20,0x00};/*"帐",0*/unsignedcharcodeda[]={0x10,0x10,0x10,0xFF,0x90,0x50,0x14,0x04,0x04,0x04,0xFC,0x04,0x04,0x04,0x04,0x00, 0x02,0x42,0x81,0x7F,0x00,0x00,0x00,0x00,0x40,0x80,0x7F,0x00,0x00,0x00,0x00,0x00};/*"打",0*/unsignedcharcodeyin[]={0x00,0xFC,0x44,0x44,0x42,0x42,0x42,0x00,0xFE,0x02,0x02,0x02,0x02,0xFE,0x00,0x00, 0x08,0x1F,0x08,0x04,0x04,0x02,0x00,0x00,0xFF,0x00,0x00,0x04,0x08,0x07,0x00,0x00};/*"印",1*/unsignedcharcodezhong[]={0x00,0x00,0xFC,0x08,0x08,0x08,0x08,0xFF,0x08,0x08,0x08,0x08,0xFC,0x08,0x00,0x00, 0x00,0x00,0x07,0x02,0x02,0x02,0x02,0xFF,0x02,0x02,0x02,0x02,0x07,0x00,0x00,0x00};/*"中",0*/unsignedcharcodewan[]={0x00,0x90,0x8C,0xA4,0xA4,0xA4,0xA5,0xA6,0xA4,0xA4,0xA4,0xA4,0x94,0x8C,0x04,0x00, 0x00,0x80,0x40,0x20,0x18,0x07,0x00,0x00,0x00,0x3F,0x40,0x40,0x40,0x70,0x00,0x00};/*"完",0*/unsignedcharcodebi[]={0x00,0x00,0xFF,0x88,0x48,0x28,0x08,0x80,0x7F,0x88,0x88,0x88,0x84,0x84,0xE0,0x00, 0x04,0x04,0x04,0x04,0x04,0x04,0x04,0xFF,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x00};/*"毕",1*/unsignedcharcodeshu[]={0x44,0xF4,0x4F,0xE4,0x44,0x64,0x90,0x98,0x94,0x93,0x14,0x98,0x08,0xD0,0x10,0x00, 0x04,0x04,0x04,0xFF,0x02,0x02,0xFF,0x4A,0x8A,0x7F,0x00,0x3F,0x80,0xFF,0x00,0x00};/*"输",0*/unsignedcharcoderu[]={0x00,0x00,0x00,0x00,0x01,0x83,0x76,0x18,0x60,0x80,0x00,0x00,0x00,0x00,0x00,0x00, 0x40,0x20,0x10,0x08,0x06,0x01,0x00,0x00,0x00,0x00,0x03,0x04,0x18,0x30,0x10,0x00};/*"入",1*/unsignedcharcodemi[]={0x00,0x58,0x24,0x04,0xF4,0x04,0x8D,0xB6,0x44,0x34,0xCC,0x94,0x24,0xCC,0x04,0x00, 0x02,0x06,0x02,0x79,0x41,0x41,0x41,0x7D,0x41,0x41,0x41,0x40,0x78,0x00,0x00,0x00};/*"密",0*/unsignedcharcodema[]={0x02,0x82,0xE2,0x5E,0x42,0xC2,0x00,0x02,0xFA,0x82,0x82,0x82,0xFE,0x80,0x00,0x00, 0x01,0x00,0x7F,0x10,0x10,0x3F,0x00,0x04,0x04,0x04,0x44,0x84,0x40,0x3F,0x00,0x00};/*"码",1*/unsignedcharcodebian[]={0x20,0x30,0xAC,0x63,0x32,0x00,0xFC,0xA4,0xA5,0xA6,0xA4,0xA4,0xA4,0xBC,0x00,0x00, 0x10,0x11,0x09,0x49,0x21,0x1C,0x03,0x7F,0x04,0x3F,0x04,0x3F,0x44,0x7F,0x00,0x00};/*"编",0*/unsignedcharcodegai[]={0x00,0x04,0x24,0x24,0x25,0x26,0x24,0xFC,0x24,0x26,0x25,0x34,0x26,0x84,0x00,0x00, 0x41,0x41,0x7D,0x45,0x45,0x7D,0x45,0x45,0x45,0x7D,0x45,0x45,0x7D,0x41,0x41,0x00};/*"盖",1*/unsignedcharcodezang[]={0x10,0x10,0x12,0xD2,0x56,0x5A,0x52,0x53,0x52,0x5A,0x56,0xD2,0x12,0x12,0x10,0x00, 0x10,0x10,0x10,0x17,0x15,0x15,0x15,0xFD,0x15,0x15,0x15,0x17,0x10,0x10,0x10,0x00};/*"章",0*/unsignedcharcodexie[]={0x00,0x08,0x06,0x82,0xFA,0x92,0x92,0x92,0x92,0x92,0x92,0x92,0x9A,0x96,0x02,0x00, 0x00,0x04,0x04,0x04,0x05,0x04,0x04,0x04,0x04,0x04,0x46,0x84,0x60,0x1F,0x00,0x00};/*"写",0*/unsignedcharcodemaohao[]={0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00};/*":",0*/unsignedcharcodeshenglvhao[]={0x00,0xC0,0xC0,0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};/*"…",0*/unsignedcharcodetanhao[]={0x00,0x00,0x70,0xF8,0xF8,0x70,0x00,0x00,0x00,0x00,0x00,0x0D,0x0D,0x00,0x00,0x00};/*"!",0*/voidDelay(uchari){ while((i--)!=0);}/******************************原型：voidDisplayon_m(uchari)*****功能：显示开关*****参数：i*****说明：0关显示，1开显示*****返回值：无*************************/voidDisplay_m(uchari){ RW=0; DI=0; P0=0xae+i; E1=1; Delay(5); E1=0; RW=1; DI=1;}voidLongDelay(uintm){ while(m) { Delay(200); m--; }}/******************************原型：voidDisplay_s(uchari)*****功能：显示开关*****参数：i*****说明：0关显示，1开显示*****返回值：无*************************/voidDisplay_s(uchari){ RW=0; DI=0; P0=0xae+i; E2=1; Delay(5); E2=0; RW=1; DI=1;}/******************************原型：voidStartLine_m(uchari)*****功能：设置显示的首行位置*****参数：i*****说明：1-31行*****返回值：无*************************/voidStartLine_m(uchari){ RW=0; DI=0; P0=0xc0+i; E1=1; Delay(5); E1=0; RW=1; DI=1;}/******************************原型：voidStartLine_s(uchari)*****功能：设置显示的首行位置*****参数：i*****说明：1-31行*****返回值：无*************************/voidStartLine_s(uchari){ RW=0; DI=0; P0=0xc0+i; E2=1; Delay(5); E2=0; RW=1; DI=1;}/******************************原型：voidSetPageAdd_m(uchari)*****功能：设置显示的首行位置*****参数：i*****说明：0-3页*****返回值：无*************************/voidSetPageAdd_m(uchari){ DI=0; RW=0; P0=0xb8+i; E1=1; Delay(5); E1=0; DI=1; RW=1;}/******************************原型：voidSetPageAdd_s(uchari)*****功能：设置显示的首行位置*****参数：i*****说明：0-3页*****返回值：无*************************/voidSetPageAdd_s(uchari){ DI=0; RW=0; P0=0xb8+i; E2=1; Delay(5); E2=0; DI=1; RW=1;}/******************************原型：SetY_m(uchari)*****功能：设置显示的列位置*****参数：i*****说明：0-79列*****返回值：无*************************/voidSetY_m(uchari){ DI=0; RW=0; P0=0x00+i; E1=1; Delay(5); E1=0; DI=1; RW=1;}/******************************原型：SetY_s(uchari)*****功能：设置显示的列位置*****参数：i*****说明：0-79列*****返回值：无*************************/voidSetY_s(uchari){ DI=0; RW=0; P0=0x00+i; E2=1; Delay(5); E2=0; DI=1; RW=1;}/******************************原型：voidWriteData_m(uchari)*****功能：写显示数据*****参数：i*****说明：*****返回值：无*************************/voidWriteData_m(uchari){ DI=1; RW=0; P0=i; E1=1; Delay(5); E1=0; E1=1; DI=1; RW=1;}/******************************原型：voidWriteData_s(uchari)*****功能：写显示数据*****参数：i*****说明：*****返回值：无*************************/voidWriteData_s(uchari){ DI=1; RW=0; P0=i; E2=1; Delay(5); E2=0; DI=1; RW=1;}/******************************原型：voidAdcSelect_m(void)*****功能：*****参数：i*****说明：*****返回值：无*************************/voidAdcSelect_m(uchari){ DI=0; RW=0; P0=0xa0+i; E1=1; Delay(5); E1=0; DI=1; RW=1;}/******************************原型：voidAdcSelect_s(void)*****功能：*****参数：i*****说明：*****返回值：无*************************/voidAdcSelect_s(uchari){ DI=0; RW=0; P0=0xa0+i; E2=1; E2=0; DI=1; RW=1;}/******************************原型：voidStaticDrv_m(uchari)*****功能：*****参数：i*****说明：0;1*****返回值：无*************************/voidStaticDrv_m(uchari){ DI=0; RW=0; P0=0xa4+i; E1=1; Delay(5); E1=0; DI=1; RW=1;}/******************************原型：voidStaticDrv_s(uchari)*****功能：*****参数：i*****说明：0;1*****返回值：无*************************/voidStaticDrv_s(uchari){ DI=0; RW=0; P0=0xa4+i; E2=1; Delay(5); E2=0; DI=1; RW=1;}/******************************原型：voidDutyRatio_m(uchari)*****功能：设置驱动比*****参数：i*****说明：0-16;1-32*****返回值：无*************************/voidDutyRatio_m(uchari){ DI=0; RW=0; P0=0xa8+i; E1=1; Delay(5); E1=0; DI=1; RW=1; }/******************************原型：voidDutyRatio_s(uchari)*****功能：设置驱动比*****参数：i*****说明：0-16;1-32*****返回值：无*************************/voidDutyRatio_s(uchari){ DI=0; RW=0; P0=0xa8+i; E2=1; Delay(5); E2=0; DI=1; RW=1;}/******************************原型：voidReset_m(void)*****功能：复位*****参数：*****说明：*****返回值：无*************************/voidReset_m(void){ DI=0; RW=0; P0=0xe2; E1=1; Delay(5); E1=0; DI=1; RW=1;}/******************************原型：voidReset_s(void)*****功能：复位*****参数：*****说明：*****返回值：无*************************/voidReset_s(void){ DI=0; RW=0; P0=0xe2; E2=1; Delay(5); E2=0; DI=1; RW=1; }voidRMW_m(void){ DI=0; RW=0; P0=0xee; E1=1; Delay(5); E1=0; DI=1; RW=1;}voidRMW_s(void){ DI=0; RW=0; P0=0xee; E2=1; Delay(5); E2=0; DI=1; RW=1;}/******************************原型：voidClr()*****功能：全屏清除*****参数：无*****说明：*****返回值：无*************************/voidClr(){ uchari; ucharj; for(i=0;i<=3;i++) { SetPageAdd_m(i); SetPageAdd_s(i); SetY_m(0); SetY_s(0); for(j=0;j<61;j++) { WriteData_m(0x00); WriteData_s(0x00); } }}/******************************原型：voidClr_onech(uchari,ucharj)*****功能：清除一个字符16×16*****参数：i，j，坐标位置*****说明：*****返回值：无*************************/voidClr_onech(uchari,ucharj){ ucharcnt; if(j<=52) { SetY_m(j); SetPageAdd_m(i); for(cnt=0;cnt<16;cnt++) { if(cnt==8) { SetPageAdd_m(i+1); SetY_m(j); } WriteData_m(0x00); } } elseif((j>=53)&&(j<=60)) { SetY_m(j); SetPageAdd_m(i); for(cnt=0;cnt<=(60-j);cnt++) { WriteData_m(0x00); } SetY_s(0); SetPageAdd_s(i); for(cnt=0;cnt<(j-53);cnt++) { WriteData_s(0x00); } SetY_m(j); SetPageAdd_m(i+1); for(cnt=0;cnt<=(60-j);cnt++) { WriteData_m(0x00); } SetY_s(0); SetPageAdd_s(i+1); for(cnt=0;cnt<(j-53);cnt++) { WriteData_s(0x00); } } else { SetY_s(j-61); SetPageAdd_s(i); for(cnt=0;cnt<16;cnt++) { if(cnt==8) { SetPageAdd_s(i+1); SetY_s(j-61); } WriteData_s(0x00); } } }/******************************原型：voidinit(void)*****功能：显示初始化*****参数：*****说明：*****返回值：无*************************/voidinit(void){ Reset_m(); Reset_s(); Display_m(0); Display_s(0); StaticDrv_m(0); StaticDrv_s(0); StartLine_m(0); StartLine_s(0); DutyRatio_m(1); DutyRatio_s(1); AdcSelect_m(0); AdcSelect_s(0); RMW_m(); RMW_s(); SetY_m(0); SetY_s(0); SetPageAdd_m(0); SetPageAdd_s(0); Display_m(1); Display_s(1); Clr();}/******************************原型：voiddisp_ch(uchari,ucharj,ucharcode*ch,uchara)*****功能：显示一个字符16*816*16*****参数：坐标位置，显示数组首地址，显示大小16or32*****说明：16为16×832为16×16*****返回值：无*************************/voiddisp_ch(uchari,ucharj,ucharcode*ch,uchara){ ucharcnt; if(j<(60-a/2)) { SetY_m(j); SetPageAdd_m(i); for(cnt=0;cnt<a;cnt++) { if(cnt==(a/2)) { SetPageAdd_m(i+1); SetY_m(j); } WriteData_m(*ch); ch++; } } elseif((j>=60-a/2)&(j<=60)) { SetY_m(j); SetPageAdd_m(i); for(cnt=0;cnt<=(60-j);cnt++) { WriteData_m(*ch); ch++; } SetY_s(0); SetPageAdd_s(i); for(cnt=0;cnt<(a/2+j-61);cnt++) { WriteData_s(*ch); ch++; } SetY_m(j); SetPageAdd_m(i+1); for(cnt=0;cnt<=(60-j);cnt++) { WriteData_m(*ch); ch++; } SetY_s(0); SetPageAdd_s(i+1); for(cnt=0;cnt<(a/2+j-61);cnt++) { WriteData_s(*ch); ch++; } } else { SetY_s(j-61); SetPageAdd_s(i); for(cnt=0;cnt<a;cnt++) { if(cnt==a/2) { SetPageAdd_s(i+1); SetY_s(j-61); } WriteData_s(*ch); ch++; } }}12.4.4PS/2解码程序ps2key.c#include<AT89X52.H>#include"ps2key.h"#include"disp.h"#include"scancodes.h"#include"char.h"/****************************************函数名：charDecode(ucharScanCode)***功能：返回解码后的值***参数：接收到的ps2键值***返回值：uchar**************************************/ucharDecode(ucharScanCode){ ucharTempCyc; uchari; if(!Key_UP) { switch(ScanCode) { case0xF0: Key_UP=1; break; default: for(TempCyc=0;(UnShifted[TempCyc][0]!=ScanCode)&&(TempCyc<59);TempCyc++);//查表显示 if(UnShifted[TempCyc][0]==ScanCode) { i=UnShifted[TempCyc][1]; } } } else { Key_UP=0; } returni;}12.4.5main主程序程序main.c#include<AT89X52.H>#include"disp.h"#include"char.h"#include"ps2key.h"staticunsignedcharcode_temp[20]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};voidKeyboard_out(void)interrupt2{ if((IntNum>0)&&(IntNum<9)) { KeyV=KeyV>>1; if(Key_Data)KeyV=KeyV|0x80; } IntNum++; while(!Key_CLK); if(IntNum>10) { IntNum=0; BF=1; EA=0; }}voidinput_char(uchar*id,ucharlength)reentrant{ uchari_temp; uchari; ucharj=0; ucharm,n; BF=0; EA=1; Clr(); while(*(id+length-1)!=60) { if(BF) { i_temp=Decode(KeyV); if((i_temp!=0)&&(i_temp!='.')) { if(j==length) { Clr(); j=0; m=0; n=0; }