📄 12864_lcd.c
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#include "iom8535v.h"
#include "macros.h"
#include "RT12864_LCD.h"
#include "declare.h"
/**********************************************************
RT12864M LCD DISPLAY
建立时间:2005年2月1号
修改日期:2005年2月1号
**********************************************************/
void LCD_init(void)
{
delay_nms(1);
LCD_write_char(0x01,0); //显示清屏
LCD_write_char(0x0C,0); //显示开
LCD_write_char(0x80,0); //显示光标移动设置
}
void LCD_en_write(void) //EN端产生一个高电平脉冲,写LCD
{
LCD_EN_PORT |= LCD_EN; //EN=1
delay_nus(1);
LCD_EN_PORT &= ~LCD_EN; //EN=0
}
/*-----------------------------------------------------------------------
LCD_write_char : 中英文字符串显示函数
LCD_write函数功能:当command=0时,向LCD写入数据,否则向LCD写
入命令
输入参数:*s :中英文字符串指针;
X、Y : 显示字符串的位置,X:0-15,Y:0-1
LCD第一行显示寄存器地址:0X80-0X87
LCD第二行显示寄存器地址:0X90-0X9F
LCD第三行显示寄存器地址:0X88-0X8F
LCD第四行显示寄存器地址:0X98-0X9F
-----------------------------------------------------------------------*/
void LCD_write_char(unsigned command,unsigned data)
{
unsigned command_temp;
unsigned data_temp;
command_temp = command;
data_temp = data;
LCD_wait_Ready();
if (command == 0)
{
LCD_EN_PORT &= ~LCD_EN; //EN=0
LCD_RS_PORT |= LCD_RS; //RS=1
LCD_RW_PORT &= ~LCD_RW; //RW=0
LCD_DATA_PORT = data_temp; //send 8bit
LCD_en_write();
}
else
{
LCD_EN_PORT &= ~LCD_EN; //EN=0
LCD_RS_PORT &= ~LCD_RS; //RS=0
LCD_RW_PORT &= ~LCD_RW; //RW=0
LCD_DATA_PORT = command_temp;//send command
LCD_en_write();
}
LCD_RW_PORT |= LCD_RW;
LCD_RS_PORT ^= LCD_RS;
}
void LCD_wait_Ready(void) //等待LCD空闲
{
LCD_DATA_DDR &= ~0x80; //PD7 I/O口方向设置为输入
LCD_RS_PORT &= ~LCD_RS; //RS=0
delay_1us(1);
LCD_RW_PORT |= LCD_RW; //RW=1
LCD_EN_PORT |= LCD_EN; //EN=1
while (!( LCD_DATA_PIN&0x80 ) == 0);
LCD_EN_PORT &= ~LCD_EN; //EN=0
LCD_DATA_DDR |= 0xFF;
}
/*-----------------------------------------------------------------------
LCD_set_xy : 设置LCD显示的起始位置
输入参数:x、y : 显示字符串的位置,X:0-15,Y:0-1
LCD第一行显示寄存器地址:0X80-0X8F
LCD第一行显示寄存器地址:0XC0-0XCF
编写日期 :2005
最后修改日期 :2005
-----------------------------------------------------------------------*/
void LCD_set_xy( unsigned char x, unsigned char y )
{
unsigned char address;
switch(y){
case 0:
address = 0x80 + x;
break;
case 1:
address = 0x90 + x;
break;
case 2:
address = 0x88 + x;
break;
case 3:
address = 0x98 + x;
break;
default:address = 0x80 + x;}
LCD_write_char( address, 0 );
}
/*-----------------------------------------------------------------------
LCD_write_string : 中英文字符串显示函数
输入参数:*s :英文字符串指针;
X、Y : 显示字符串的位置
编写日期 :2005
最后修改日期 :2005
-----------------------------------------------------------------------*/
void LCD_write_string(unsigned char X,unsigned char Y,unsigned char *s)
{
LCD_set_xy( X, Y );
while (*s)
{
LCD_write_char( 0, *s );
s ++;
delay_nms(1);
}
}
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