用LPC2478驱动液晶显示屏SO12864

#include "LPC24xx.h" /* LPC2xxx definitions */ #include "type.h" #include "timer.h" #include "fio.h" #include "uart.h" #include "Key.h" #include "LCD.h" #include "char_lib.h" extern void timer1_Delay(WORD ms); volatile char line_counter,col_counter,start_line,full_flag; //************************************************** // 初始化 //************************************************** void LCD_init(void) { char m; char *LCD_ptr; line_counter = 0; col_counter = 0;; start_line = 0; full_flag = 0; FIO1MASK = 0; LCD_CS_H; // CS高 PINSEL3 &=0x000003FF; // 引脚功能选择 IODIR1|= 0xFFE00000; // 引脚方向--输出 IOPIN1 &=~(0xFF<<23); // D0-D7低 LCD_EN_H; // EN高 LCD_A0_data; // A0高 LCD_RW_read; // RW高 LCD_CS_L; LCD_write_cmd(0xAF); // 开始显示 CMD_display_on LCD_write_cmd(0x40); // 发送起始行地址 CMD_set_line(x) LCD_write_cmd(0xA0); // 设置屏幕正向 CMD_set_ADC_n LCD_write_cmd(0xA6); // 极性 CMD_set_polarity LCD_write_cmd(0xA2); // 偏压 CMD_set_bias LCD_write_cmd(0xC8); // 正反 CMD_output_mode LCD_write_cmd(0x2F); // 电源 CMD_set_power LCD_write_cmd(0x24); // 倍压比 CMD_set_ration LCD_write_cmd(0x81); // 亮度 CMD_volume_Mode LCD_write_cmd(0x24); // 亮度 CMD_volume_Md(0x24) LCD_write_cmd(0xAC); // 不闪烁 CMD_Static_off LCD_CS_H; // CS高 line_counter = 0; clear_line(line_total,line_counter); // 清屏 line_counter = 1; // 显示"福星晓程" col_counter = 2; LCD_ptr = (char*)play_logo; LCD_CS_L; for(m=0;m<logo_len;m++) { LCD_play_character(line_counter,col_counter,column_mun_logo,LCD_ptr); //column_mun_logo LCD_ptr += column_mun_logo * page_mun; col_counter++; } line_counter = 0; // 清屏 clear_line(page_mun*2,line_counter); LCD_CS_L; LCD_write_cmd(0x40); // 设起始行 LCD_CS_H; line_counter = 0; col_counter = 0; full_flag = 0; start_line = 0; } //************************************************** // 发送一个命令 //************************************************** void LCD_write_cmd(char cmd_index) { int i; IOPIN1 &= ~(0xFF<<23); IOPIN1 |= cmd_index<<23; LCD_A0_cmd; // A0--cmd LCD_RW_write; // RW--write for(i=0;i<hold_time;i++); LCD_EN_L; // EN--L for(i=0;i<hold_time;i++); LCD_EN_H; // EN恢复高电平 LCD_A0_data; // A0恢复高电平 LCD_RW_read; // RW恢复高电平 IOPIN1 &=~(0xFF<<23); // D0-D7清0 } //************************************************** // 发送一个数据 //************************************************** void LCD_write_data(char play_data) { int i; IOPIN1 &= ~(0xFF<<23); IOPIN1 |= play_data<<23; LCD_A0_data; // A0--data LCD_RW_write; // RW--write for(i=0;i<hold_time;i++); LCD_EN_L; // EN--L for(i=0;i<hold_time;i++); LCD_EN_H; // EN恢复高电平 LCD_RW_read; // RW恢复高电平 IOPIN1 &=~(0xFF<<23); // D0-D7清0 } //************************************************** // 显示一个字符 // input: addr_page, addr_col, col_mun, *pp // (第几行字符)(第几列字符)（字符点阵有几列）(字库首地址) //************************************************** void LCD_play_character(char addr_page,char addr_col,char col_mun,char *pp) { BYTE i,j,counter; addr_page = addr_page*page_mun; addr_col = addr_col*col_mun; counter = addr_col; if((addr_page>=page_total)&&(addr_col>=col_total)) return; send_page_addr(addr_page); // 发送页地址(addr_page) send_col_addr(addr_col); // 发送列地址(addr_col) for(i=0;i<page_mun;i++) { for(j=0;j<col_mun;j++) { LCD_write_data(*pp); pp++; counter++; send_col_addr(counter); } send_page_addr(addr_page+1); send_col_addr(addr_col); counter = addr_col; } } //************************************************** // 显示一个字符串 // input: *ptr, len, line_count, col_count // (字符串首地址)(字符串长度)(显示在第几行)（显示在第几列） //************************************************** void LCD_play_string(char *ptr,char len) { char *addr; char dummy; if(len==0) return; if(full_flag==0x55) //如果是满屏的 { #if LCD_roll // 如果需要滚屏 switch(start_line) { case 0: start_line = page_mun*2+1; break; default: start_line += page_mun*2; //page_mun*8 break; } dummy = CMD_set_line(start_line); LCD_CS_L; LCD_write_cmd(dummy); // 翻屏 LCD_CS_H; clear_line(1,line_counter); // 清行 col_counter=0; #else if(line_counter==0) { clear_line(line_total,0); //清屏 col_counter=0; full_flag=0; } #endif } dummy = col_total/column_mun; // 如果字数超了，就只显示最大长度 if(len>dummy) len = dummy; while(len) { LCD_CS_L; dummy = *(ptr++); addr = (char*)play_null; if(dummy<='9') //column_mun*page_mun { if(dummy>='0') { addr = (char*)play_0 + (dummy-'0')*page_mun*column_mun; goto play_character; } } if(dummy<='Z') { if(dummy>='A') { addr = (char*)play_A + (dummy-'A')*page_mun*column_mun; goto play_character; } } if(dummy<='z') { if(dummy>='a') { addr = (char*)play_a + (dummy-'a')*page_mun*column_mun; goto play_character; } } play_character: LCD_play_character(line_counter,col_counter,column_mun,addr); //显示字符 col_counter++; len--; LCD_CS_H; } line_counter++; col_counter = 0; if(line_counter==line_total) // 如果满屏：置满屏标志 { full_flag = 0x55; line_counter = 0; start_line = 0; } } //************************************************** // 清屏 // input: total(一共清几行) line_num(从第几开始清) //************************************************** void clear_line(char total,char line_num) { char i,j; LCD_CS_L; if(line_num >= line_total) return; if(line_num > total) return; line_num *= page_mun; total *= page_mun; i = line_num+total; if(i > page_total) {total = page_total - line_num;} for(i=0;i<total;i++) // 清屏 { send_page_addr(line_num); // 页地址 for(j=0;j<col_total;j++) { send_col_addr(j); // 列地址 LCD_write_data(0); } line_num++; } LCD_CS_H; } //************************************************** // 发送页地址 // input: //************************************************** void send_page_addr(char p_addr) { char cmd_p; cmd_p = CMD_set_page(p_addr); // 页地址加1 LCD_write_cmd(cmd_p); } //************************************************** // 发送列地址 // input: //************************************************** void send_col_addr(char c_addr) { char cmd_c; cmd_c = CMD_set_col_H(c_addr); // 高 LCD_write_cmd(cmd_c); cmd_c = CMD_set_col_L(c_addr); // 低 LCD_write_cmd(cmd_c); }