LCD.zip_12864 c51_LCD12064简介

#include "display.h" #define LCD_port P0 //定义LCD数据口 #define clear_dis 0x01 //清除显示 #define add_location 0x02 //地址归位 #define show_state 0x0c //显示状态 游标关闭 #define enter_set 0x06 //进入点设定 #define draw_off 0x34 //功能设定 绘图显示关 #define draw_on 0x36 //功能设定 绘图显示开 #define base_function 0x30 //基本功能设定 #define head_add 0x80 //初始显示地址（水平地址、垂直地址） #define second_add 0x88 //第二屏显示地址 /*#define Line1 0x80 //第一行 #define Line2 0x90 //第二行 #define Line3 0x88 //第三行 #define Line4 0x98 //第四行*/ /*----------------定义端口--------------------*/ sbit EN = P3^4; //使能信号 sbit RS = P3^5; //数据/命令选择端 sbit RW = P3^6; //读/写选择端 sbit RD = P3^7; //并/串选择端 void LCD_init_port(void) { EN = 1; _nop_(); RS = 1; _nop_(); RW = 1; _nop_(); RD = 1; _nop_(); } void LCD_w_directive(unchar dir) { EN = 0; RS = 0; RW = 0; LCD_port = dir; _nop_(); EN = 1; _nop_(); EN = 0; } void LCD_w_data(unchar da) { EN = 1; RS = 1; RW = 0; LCD_port = da; _nop_(); EN = 1; _nop_(); EN = 0; } void LCD_test_busy(void) { EN = 0; RS = 0; RW = 1; _nop_(); EN = 1; _nop_(); LCD_port = 0xff; while(LCD_port & 0x80); } unchar LCD_r_data(void) { unchar value; EN = 0; RS = 1; RW = 1; _nop_(); EN = 1; _nop_(); LCD_port = 0xff; value = LCD_port; delay(1); EN = 0; return (value); } /*-------------清除GDRAM---------------*/ void LCD_clear_GDRAM(void) { unchar x,y; LCD_test_busy(); LCD_w_directive(draw_off); LCD_test_busy(); for(x=0;x<32;x++) { LCD_test_busy(); LCD_w_directive(head_add+x); //写竖列 LCD_test_busy(); LCD_w_directive(head_add); //写横列 for(y=0;y<32;y++) { LCD_test_busy(); LCD_w_data(0x00); } } LCD_test_busy(); LCD_w_directive(draw_on); } void LCD_picture(unchar x,unchar y,unchar width,unchar height,unchar *pic) { static unchar next_height = 0; unchar LCD_x = head_add+x,LCD_y = head_add+y; unchar j,k; width /= 8; if(height > 32) { next_height = height; height = 32-y; } LCD_test_busy(); LCD_w_directive(draw_off); LCD_test_busy(); loop: for(j=0;j<height;j++) { next_height--; LCD_test_busy(); LCD_w_directive(LCD_y+j); LCD_test_busy(); LCD_w_directive(LCD_x); for(k=0;k<width;k++) { LCD_test_busy(); LCD_w_data(*pic++); } } if(next_height != 0) { height = next_height; LCD_x = second_add+x; LCD_y = head_add; goto loop; } LCD_test_busy(); LCD_w_directive(draw_on); LCD_test_busy(); LCD_w_directive(base_function); } void LCD_picture_dot(unchar x,unchar y) { unchar bit_x,add_x; unchar LSB,HSB; LCD_test_busy(); LCD_w_directive(draw_off); add_x = x / 16; bit_x = x % 16; LCD_test_busy(); LCD_w_directive(head_add+y); LCD_test_busy(); LCD_w_directive(head_add+add_x); LCD_test_busy(); HSB = LCD_r_data(); //假读 LCD_test_busy(); HSB = LCD_r_data(); LCD_test_busy(); LSB = LCD_r_data(); if(bit_x<8) { LSB |= 0x01 << bit_x; } else { bit_x -= 8; HSB |= 0x01 << bit_x; } LCD_test_busy(); LCD_w_directive(head_add+y); LCD_test_busy(); LCD_w_directive(head_add+add_x); LCD_test_busy(); LCD_w_data(HSB); LCD_test_busy(); LCD_w_data(LSB); LCD_test_busy(); LCD_w_directive(draw_on); LCD_test_busy(); LCD_w_directive(base_function); } void LCD_write_string(unchar x,unchar *p) { unchar z; LCD_test_busy(); LCD_w_directive(head_add+x); LCD_test_busy(); for(z=strlen(p);z>0;z--) { LCD_test_busy(); LCD_w_data(*p++); } } void LCD_dynamic_dis(unchar x,unchar value) { unchar ge,shi,bai; ge = value % 10; shi = value % 100 / 10; bai = value / 100; LCD_test_busy(); LCD_w_directive(head_add+x); LCD_test_busy(); LCD_w_data(0x30+bai); LCD_test_busy(); LCD_w_data(0x30+shi); LCD_test_busy(); LCD_w_data(0x30+ge); } void LCD_setup(void) { LCD_init_port(); LCD_test_busy(); LCD_w_directive(base_function); LCD_test_busy(); LCD_w_directive(clear_dis); LCD_test_busy(); LCD_w_directive(add_location); LCD_test_busy(); LCD_w_directive(show_state); LCD_test_busy(); LCD_w_directive(enter_set); LCD_test_busy(); LCD_clear_GDRAM(); LCD_test_busy(); LCD_w_directive(base_function); }