花费了10天，终于把lcd1602点亮了，中间遇到了一些问题，比如上电后只有一行黑块，后来仔细检查，不断尝试终于把问题解决了~过程曲折啊，不过还是怪自己太菜，以后要多多加油啊~O(∩_∩)O~下面把程序放上来与大家共享，共同进步~
主函数：
//包含所需头文件
#include <avr/io.h>
#include <avr/interrupt.h>
#include <abc_lcd.h>
/*------宏定义------*/
#define uchar unsigned char
#define uint unsigned int
#define BIT(x) (1<<(x))
#define NOP() asm("nop")
#define WDR() asm("wdr")
//端口初始化
void port_init(void)
{
PORTA = 0x00;
DDRA = 0x00;
PORTB = 0x00;
DDRB = 0x00;
PORTC = 0x00;
DDRC = 0x00;
PORTD = 0x00;
DDRD = 0x00;
}
void init_devices(void)
{
cli(); //禁止所有中断
MCUCR = 0x00;
MCUCSR = 0x80;//禁止JTAG
GICR = 0x00;
port_init();
Delay_nms(500);
lcd_init();
sei();//开全局中断
}
//主函数
int main(void)
{init_devices();
uint i,j;
while(1)
{lcd_locate(0,0);
lcd_print_string("^^MyLCD1602@_@^^");
lcd_locate(0,1);
lcd_print_string("^^Thanks m7w!!^^");
Delay_nms(5000);
lcd_cls();
for(i=0x41,j=0;i<0x90;i++)
{lcd_write_char(j,0,i);
j++;
Delay_nms(5000);}
}
return 0;
}
lcd1602驱动程序"abc_lcd.h"：
/*
* ----------------------------------------------------------------------------
* Project Charger SE
*
* file: abc_lcd.h
*
* 创建者： Trinove
* 创建日期： 2008-1-13
*
* 修改者：martin7wind
* 修改日期：2008-2-3
*
* 最后修改者：dxxlovewj
* 修改日期：2009.12.22
* qq：281564713 朋友们可以加我大家共同进步哈~我是新手~
* 当前版本： 0.01
*
* ----------------------------------------------------------------------------
*
*
* 液晶显示的基本支持函数
*
*/
#ifndef _LCD_H_
#define _LCD_H_ 1
// 位操作
#define BIT(x) (1<<(x))
#define BIT_SET(a,b) a|=BIT(b)
#define BIT_CLR(a,b) a&=~BIT(b)
#define BIT_INV(a,b) a^=BIT(b)
#define BIT_STATUS(a,b) a&BIT(b)
#define xtal 1
//四线模式
/*----------------------------------------------------------------------------
LCD 1602
PIN0~7 RW E RS
连线如下：
PIN7 --> PA7
PIN6 --> PA6
PIN5 --> PA5
PIN4 --> PA4
RW --> GND (R/W = 0 write)
E --> PA6 (E = 1 enable )
RS --> PA7 (RS = 0 CMD;RS = 1 DATA )
---------------------------------------------------------------------------*/
#define uint unsigned int
#define LCD_DATA7_DDR DDRA
#define LCD_DATA6_DDR DDRA
#define LCD_DATA5_DDR DDRA
#define LCD_DATA4_DDR DDRA
#define LCD_DATA7_PIN PINA
#define LCD_DATA6_PIN PINA
#define LCD_DATA5_PIN PINA
#define LCD_DATA4_PIN PINA
#define LCD_DATA7_PORT PORTA
#define LCD_DATA6_PORT PORTA
#define LCD_DATA5_PORT PORTA
#define LCD_DATA4_PORT PORTA
#define LCD_DATA7 PA7
#define LCD_DATA6 PA6
#define LCD_DATA5 PA5
#define LCD_DATA4 PA4
#define LCD_E_DDR DDRD
#define LCD_E_PORT PORTD
#define LCD_E PD7
#define LCD_E_HIGH BIT_SET(LCD_E_PORT, LCD_E)
#define LCD_E_LOW BIT_CLR(LCD_E_PORT, LCD_E)
#define LCD_RS_DDR DDRC
#define LCD_RS_PORT PORTC
#define LCD_RS PC6
#define LCD_DATA_MODE BIT_SET(LCD_RS_PORT, LCD_RS)
#define LCD_CMD_MODE BIT_CLR(LCD_RS_PORT, LCD_RS)
#define CMD 0
#define DATA 1
#define BIT_POSITION7 (1<<7)
#define BIT_POSITION6 (1<<6)
#define BIT_POSITION5 (1<<5)
#define BIT_POSITION4 (1<<4)
#define LINE_1 0
#define LINE_2 1
void Delay_us(void) //1us延时函数
{
asm("nop");
}
void Delay_nus(unsigned int n) //N us延时函数
{
unsigned int i=0;
for (i=0;i<n;i++)
Delay_us();
}
void Delay_1ms(void)
{uint j;
for (j=1;j<(uint)(xtal*143-2);j++)
;
}
void Delay_nms(unsigned int n) //N ms延时函数
{
unsigned int j=0;
for (j=0;j<n;j++)
Delay_1ms();
}
unsigned int temp;
//最初的初始化设置中，写入数据函数
void lcd_write_cmd(unsigned char cmd)
{
LCD_CMD_MODE;
if(cmd&BIT_POSITION7)
{BIT_SET(LCD_DATA7_PORT,LCD_DATA7);}
else
{BIT_CLR(LCD_DATA7_PORT,LCD_DATA7);}
if(cmd&BIT_POSITION6)
{BIT_SET(LCD_DATA6_PORT,LCD_DATA6);}
else
{BIT_CLR(LCD_DATA6_PORT,LCD_DATA6);}
if(cmd&BIT_POSITION5)
{BIT_SET(LCD_DATA5_PORT,LCD_DATA5);}
else
{BIT_CLR(LCD_DATA5_PORT,LCD_DATA5);}
if(cmd&BIT_POSITION4)
{BIT_SET(LCD_DATA4_PORT,LCD_DATA4);}
else
{BIT_CLR(LCD_DATA4_PORT,LCD_DATA4);}
//E 信号
LCD_E_HIGH;
Delay_nus(500);
LCD_E_LOW;
}
// 向LCD写入数据
void lcd_write_byte(unsigned char byte, unsigned char type)
{
if(type)
{LCD_DATA_MODE;}
else
{LCD_CMD_MODE;}
temp = byte;
if(byte&BIT_POSITION7)
{BIT_SET(LCD_DATA7_PORT,LCD_DATA7);}
else
{BIT_CLR(LCD_DATA7_PORT,LCD_DATA7);}
if(byte&BIT_POSITION6)
{BIT_SET(LCD_DATA6_PORT,LCD_DATA6);}
else
{BIT_CLR(LCD_DATA6_PORT,LCD_DATA6);}
if(byte&BIT_POSITION5)
{BIT_SET(LCD_DATA5_PORT,LCD_DATA5);}
else
{BIT_CLR(LCD_DATA5_PORT,LCD_DATA5);}
if(byte&BIT_POSITION4)
{BIT_SET(LCD_DATA4_PORT,LCD_DATA4);}
else
{BIT_CLR(LCD_DATA4_PORT,LCD_DATA4);}
//E 信号
LCD_E_HIGH;
Delay_nus(500);
LCD_E_LOW;
Delay_nms(500);//39us!
byte <<=4;
if(byte&BIT_POSITION7)
{BIT_SET(LCD_DATA7_PORT,LCD_DATA7);}
else
{BIT_CLR(LCD_DATA7_PORT,LCD_DATA7);}
if(byte&BIT_POSITION6)
{BIT_SET(LCD_DATA6_PORT,LCD_DATA6);}
else
{BIT_CLR(LCD_DATA6_PORT,LCD_DATA6);}
if(byte&BIT_POSITION5)
{BIT_SET(LCD_DATA5_PORT,LCD_DATA5);}
else
{BIT_CLR(LCD_DATA5_PORT,LCD_DATA5);}
if(byte&BIT_POSITION4)
{BIT_SET(LCD_DATA4_PORT,LCD_DATA4);}
else
{BIT_CLR(LCD_DATA4_PORT,LCD_DATA4);}
//E 信号
LCD_E_HIGH;
Delay_nms(500);
LCD_E_LOW;
Delay_nms(500);
}
// 向LCD写入指令
void lcd_write_order(unsigned char order)
{
}
// 从LCD读取标志
unsigned char lcd_read_status(void)
{
unsigned char result;
return result;
}
//清屏
void lcd_cls()
{
lcd_write_byte(0x01,CMD);
}
/********************************************************
1602 液晶初始化函数
输入:无
输出:无
功能: 设置io状态，初始化1602
********************************************************/
void lcd_init()
{
// 相关IO配置
BIT_SET(LCD_DATA7_DDR, LCD_DATA7);
BIT_SET(LCD_DATA6_DDR, LCD_DATA6);
BIT_SET(LCD_DATA5_DDR, LCD_DATA5);
BIT_SET(LCD_DATA4_DDR, LCD_DATA4);
BIT_SET(LCD_E_DDR, LCD_E);
BIT_SET(LCD_RS_DDR,LCD_RS);
Delay_nms(500);//上电延时15MS以上
lcd_write_cmd(0x30);//上电初始化命令
Delay_nms(500);//delay >5.1MS
lcd_write_cmd(0x30);
Delay_nms(500);//delay >100us
lcd_write_cmd(0x30);
Delay_nms(500);
lcd_write_cmd(0x20);//四位数据模式
Delay_nms(500);
//功能设定
lcd_write_byte(0x28,CMD);//0x28=4位数据线，双行显示，5*7字型
Delay_nms(500);
lcd_write_byte(0x28,CMD);//0x28=4位数据线，双行显示，5*7字型
Delay_nms(500);
lcd_write_byte(0x28,CMD);//0x28=4位数据线，双行显示，5*7字型
Delay_nms(500);
lcd_write_byte(0x28,CMD);//0x28=4位数据线，双行显示，5*7字型
Delay_nms(500);
//LCD_write_byte(0x0e,CMD);//0x0e=显示开，光标不闪烁
lcd_write_byte(0x0c,CMD);//0x0c=显示开，光标不显示
Delay_nms(500);
lcd_write_byte(0x0c,CMD);//0x0c=显示开，光标不显示
Delay_nms(500);
lcd_write_byte(0x06,CMD);//0x06=每次输入后光标右移一格
Delay_nms(500);
lcd_cls();
Delay_nms(500);
}
void lcd_write_char(unsigned char lcd_x,unsigned char lcd_y,unsigned char data)
{
if(lcd_y) //第二行
lcd_write_byte(0xc0+lcd_x,CMD);
else //第一行
lcd_write_byte(0x80+lcd_x,CMD);
Delay_nms(5000);
lcd_write_byte(data,DATA);
}
// 从LCD读取数据
unsigned char lcd_read_data(void)
{
unsigned char result;
return result;
}
// 定位LCD行列位置
// 横坐标 lcd_x
//纵坐标 lcd_y
void lcd_locate(unsigned char lcd_x, unsigned char lcd_y)
{
if(lcd_y) //第二行
lcd_write_byte(0xc0+lcd_x,CMD);
else //第一行
lcd_write_byte(0x80+lcd_x,CMD);
}
// 向LCD发送显示文字
//输入参数显示文字指针pstring
void lcd_print_string(unsigned char * pstring)
{
while(*pstring)
{
lcd_write_byte(*pstring,DATA);
pstring++;
}
}
// 向LCD发送显示数据
// number表示数值，为有符号的整数，ca表示显示的位数(1-6)，cb表示其中的小数位数，（类似定点的小数）
// 显示整数时，cb置0即可
void lcd_print_number(signed int number , unsigned char ca , unsigned char cb)
{
unsigned char bit[4]; //uint, 最多5位
unsigned char *pbit;
unsigned char i;
if(number>0)
{
temp = number;
}
else
{
temp =-number;
}
// temp = 12345;
//算出每一位057920
bit[4] = temp/10000 ;
bit[3] = temp/1000 - bit[4]*10;
bit[2] = temp/100 - bit[4]*100 - bit[3]*10;
bit[1] = temp/10 - bit[4]*1000 - bit[3]*100 - bit[2]*10;
bit[0] = temp - bit[4]*10000 - bit[3]*1000 - bit[2]*100 - bit[1]*10;
if(number<0) //负值
{
lcd_write_byte('-', DATA); //先显示负号
pbit = &(bit [4]); //指向最高位
for(i=5-ca;i>0;i--)
pbit --;
while(ca)
{
if(ca==cb)
lcd_write_byte('.', DATA);
lcd_write_byte(*pbit+48,DATA);
pbit --;
ca--;
}
}
else //正数
{
pbit = &(bit [4]); //指向最高位
for(i=5-ca;i>0;i--)
pbit --;
while(ca)
{
if(ca==cb)
lcd_write_byte('.', DATA);
lcd_write_byte(*pbit+48,DATA);
pbit --;
ca--;
}
}
}
#endif |
发表于 2009-12-22 20:51
| 
发表于 2009-12-22 22:50
| 
