14液晶12864并行2 C语言 程序代码

#include "reg52.h" #include "intrins.h" sbit io_LCD12864_RS = P2^5 ; sbit io_LCD12864_RW = P2^6 ; sbit io_LCD12864_EN = P2^7 ; #define io_LCD12864_DATAPORT P0 #define SET_DATA io_LCD12864_RS = 1 ; #define SET_INC io_LCD12864_RS = 0 ; #define SET_READ io_LCD12864_RW = 1 ; #define SET_WRITE io_LCD12864_RW = 0 ; #define SET_EN io_LCD12864_EN = 1 ; #define CLR_EN io_LCD12864_EN = 0 ; void v_Lcd12864CheckBusy_f( void ) //忙检测函数 { unsigned int nTimeOut = 0 ; SET_INC SET_READ CLR_EN SET_EN while( ( io_LCD12864_DATAPORT & 0x80 ) && ( ++nTimeOut != 0 ) ) ; CLR_EN SET_INC SET_READ } void v_Lcd12864SendCmd_f( unsigned char byCmd ) //发送命令 { v_Lcd12864CheckBusy_f() ; SET_INC SET_WRITE CLR_EN io_LCD12864_DATAPORT = byCmd ; _nop_(); _nop_(); SET_EN _nop_(); _nop_(); CLR_EN SET_READ SET_INC } void v_Lcd12864SendData_f( unsigned char byData ) //发送数据 { v_Lcd12864CheckBusy_f() ; SET_DATA SET_WRITE CLR_EN io_LCD12864_DATAPORT = byData ; _nop_(); _nop_(); SET_EN _nop_(); _nop_(); CLR_EN SET_READ SET_INC } void v_DelayMs_f( unsigned int nDelay ) //延时 { unsigned int i ; for( ; nDelay > 0 ; nDelay-- ) { for( i = 125 ; i > 0 ; i-- ) ; } } void v_Lcd12864Init_f( void ) //初始化 { v_Lcd12864SendCmd_f( 0x30 ) ; //基本指令集 v_DelayMs_f( 50 ) ; v_Lcd12864SendCmd_f( 0x01 ) ; //清屏 v_DelayMs_f( 50 ) ; v_Lcd12864SendCmd_f( 0x06 ) ; //光标右移 v_DelayMs_f( 50 ) ; v_Lcd12864SendCmd_f( 0x0c ) ; //开显示 } void v_Lcd12864SetAddress_f( unsigned char x, y ) //地址转换 { unsigned char byAddress ; switch( y ) { case 0 : byAddress = 0x80 + x ; break; case 1 : byAddress = 0x90 + x ; break ; case 2 : byAddress = 0x88 + x ; break ; case 3 : byAddress = 0x98 + x ; break ; default : break ; } v_Lcd12864SendCmd_f( byAddress ) ; } void v_Lcd12864PutString_f( unsigned char x, unsigned char y, unsigned char *pData ) { v_Lcd12864SetAddress_f( x, y ) ; while( *pData != '\0' ) { v_Lcd12864SendData_f( *pData++ ) ; } } void main( void ) { v_Lcd12864Init_f() ; v_Lcd12864PutString_f( 0,0, " 东流电子") ; v_Lcd12864PutString_f( 2,1, "开发板商城") ; v_Lcd12864PutString_f( 0,2, "*LCD12864ST7920*") ; v_Lcd12864PutString_f( 0,3, "★○◇◆※☆■△") ; while( 1 ) ; }