📄 3310lcd_function.c
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#include <avr/io.h>
#include "english_6x8_pixel.h"
#include "delay_function.C"
// Mega48/8 port B pinout for LCD.
#define LCD_DC 0x01 // PB0
#define LCD_CE 0x04 // PB2
#define SPI_MOSI 0x08 // PB3
#define LCD_RST 0x10 // PB4
#define SPI_CLK 0x20 // PB5
void LCD_init(void);
void LCD_clear(void);
void LCD_write_english_string(unsigned char X,unsigned char Y,char *s);
void LCD_write_chinese_string(unsigned char X, unsigned char Y,
unsigned char ch_with,unsigned char num,
unsigned char line,unsigned char row);
void LCD_write_char(unsigned char c);
void LCD_write_byte(unsigned char data, unsigned char dc);
void delay_1us(void);
void delay_nus(unsigned int n);
void delay_1ms(void);
void delay_nms(unsigned int n);
/*-----------------------------------------------------------------------
LCD_init : 3310LCD初始化
编写日期 :2004-8-10
最后修改日期 :2004-8-10
-----------------------------------------------------------------------*/
void LCD_init(void)
{
PORTB &= ~LCD_RST; // 产生一个让LCD复位的低电平脉冲
delay_1us();
PORTB |= LCD_RST;
PORTB &= ~LCD_CE ; // 关闭LCD
delay_1us();
PORTB |= LCD_CE; // 使能LCD
delay_1us();
LCD_write_byte(0x21, 0); // 使用扩展命令设置LCD模式
LCD_write_byte(0xc8, 0); // 设置偏置电压
LCD_write_byte(0x06, 0); // 温度校正
LCD_write_byte(0x13, 0); // 1:48
LCD_write_byte(0x20, 0); // 使用基本命令
LCD_clear(); // 清屏
LCD_write_byte(0x0c, 0); // 设定显示模式,正常显示
PORTB &= ~LCD_CE ; // 关闭LCD
}
/*-----------------------------------------------------------------------
LCD_clear : LCD清屏函数
编写日期 :2004-8-10
最后修改日期 :2004-8-10
-----------------------------------------------------------------------*/
void LCD_clear(void)
{
unsigned int i;
LCD_write_byte(0x0c, 0);
LCD_write_byte(0x80, 0);
for (i=0; i<504; i++)
LCD_write_byte(0, 1);
}
/*-----------------------------------------------------------------------
LCD_set_XY : 设置LCD坐标函数
输入参数:X :0-83
Y :0-5
编写日期 :2004-8-10
最后修改日期 :2004-8-10
-----------------------------------------------------------------------*/
void LCD_set_XY(unsigned char X, unsigned char Y)
{
LCD_write_byte(0x40 | Y, 0); // column
LCD_write_byte(0x80 | X, 0); // row
}
/*-----------------------------------------------------------------------
LCD_write_char : 显示英文字符
输入参数:c :显示的字符;
编写日期 :2004-8-10
最后修改日期 :2004-8-10
-----------------------------------------------------------------------*/
void LCD_write_char(unsigned char c)
{
unsigned int line;
c -= 32;
for (line=0; line<6; line++)
LCD_write_byte(font6x8[c][line], 1);
}
void LCD_write_inverse_char(unsigned char c)
{
unsigned int line;
c -= 32;
for (line=0; line<6; line++)
LCD_write_byte(~font6x8[c][line], 1);
}
/*-----------------------------------------------------------------------
LCD_write_english_String : 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,x 0-83 ,y 0-5
编写日期 :2004-8-10
最后修改日期 :2004-8-10
-----------------------------------------------------------------------*/
void LCD_write_english_string(unsigned char X,unsigned char Y,char *s)
{
LCD_set_XY(X,Y);
while (*s)
{
LCD_write_char(*s);
s++;
}
}
void LCD_write_inverse_string(unsigned char X,unsigned char Y,char *s)
{
LCD_set_XY(X,Y);
while (*s)
{
LCD_write_inverse_char(*s);
s++;
}
}
/*-----------------------------------------------------------------------
LCD_write_byte : 使用SPI接口写数据到LCD
输入参数:data :写入的数据;
command :写数据/命令选择;
编写日期 :2004-8-10
最后修改日期 :2004-8-13
-----------------------------------------------------------------------*/
void LCD_write_byte(unsigned char data, unsigned char command)
{
PORTB &= ~LCD_CE ; // 使能LCD
if (command == 0)
PORTB &= ~LCD_DC ; // 传送命令
else
PORTB |= LCD_DC ; // 传送数据
SPDR = data; // 传送数据到SPI寄存器
while ((SPSR & 0x80) == 0); // 等待数据传送完毕
PORTB |= LCD_CE ; // 关闭LCD
}
void lcd_inverse(void)
{
LCD_write_byte(0b00001101,0);
}
void lcd_no_inverse(void)
{
LCD_write_byte(0b00001100,0);
}
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