在此章节,我明白了上个1602程序出现的问题,也就是时序问题,因为我们的单片机速度较快,所以要把使能E的高电平的一段延时到读取数据的那段时间,并再次使用延时函数延长E的高电平时间,让DB的数据完全被读取。然后学习整屏移动的程序,和LED点阵有些像。在学习多.c文件后用1602整屏移动进行尝试。
程序:
1602整屏移动(完整程序)
#include<reg52.h>
#define LCD1602_DB P0
sbit LCD1602_RS = P2^0;
sbit LCD1602_RW = P2^1;
sbit LCD1602_E = P1^2;
bit flag500ms = 0;
unsigned char T0RH = 0;
unsigned char T0RL = 0;
unsigned char code str1[] = " Xin Bao ";
unsigned char code str2[] = "I Love You!";
void ConfigTimer0(unsigned int ms);
void InitLcd1602();
void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str,unsigned char len);
void delay()
{
unsigned int i;
i=5;
while(--i);
}
void main()
{
unsigned char i;
unsigned char index = 0;
unsigned char pdata bufMove1[16+sizeof(str1)+16];
unsigned char pdata bufMove2[16+sizeof(str2)+16];
EA = 1;
ConfigTimer0(10);
InitLcd1602();
for(i=0;i<16;i++)
{
bufMove1 = ' ';
bufMove2 = ' ';
}
for(i=0;i<(sizeof(str1)-1);i++)
{
bufMove1[16+i] = str1;
bufMove2[16+i] = str2;
}
for(i=(16+sizeof(str1)-1);i<sizeof(bufMove1);i++)
{
bufMove1 = ' ';
bufMove2 = ' ';
}
while(1)
{
if(flag500ms)
{
flag500ms = 0;
LcdShowStr(0,0,bufMove1+index,16);
LcdShowStr(0,1,bufMove2+index,16);
index++;
if(index>=(16+sizeof(str1)-1))
{
index = 0;
}
}
}
}
void ConfigTimer0(unsigned int ms)
{
unsigned long tmp;
tmp = 32768000/12;
tmp = (tmp*ms)/1000;
tmp = 65536 - tmp;
tmp = tmp + 13;
T0RH = (unsigned char)(tmp>>8);
T0RL = (unsigned char)tmp;
TMOD &= 0xF0;
TMOD |= 0x01;
TH0 = T0RH;
TL0 = T0RL;
ET0 = 1;
TR0 = 1;
}
void LcdWaitReady()
{
unsigned char sta;
LCD1602_DB = 0xFF;
LCD1602_RS = 0;
LCD1602_RW = 1;
do{
LCD1602_E = 1;
sta = LCD1602_DB;
LCD1602_E = 0;
}while(sta&0x80);
}
void LcdWriteCmd(unsigned char cmd)
{
LcdWaitReady();
LCD1602_RS = 0;
LCD1602_RW = 0;
LCD1602_DB = cmd;
delay();
LCD1602_E = 1;
delay();
LCD1602_E = 0;
}
void LcdWriteDat(unsigned char dat)
{
LcdWaitReady();
LCD1602_RS = 1;
LCD1602_RW = 0;
LCD1602_DB = dat;
delay();
LCD1602_E = 1;
delay();
LCD1602_E = 0;
}
void LcdSetCursor(unsigned char x,unsigned char y)
{
unsigned char addr;
if(y == 0)
addr = 0x00+x;
else
addr = 0x40+x;
LcdWriteCmd(addr | 0x80);
}
void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str,unsigned char len)
{
LcdSetCursor(x,y);
while(len--)
{
LcdWriteDat(*str++);
}
}
void InitLcd1602()
{
LcdWriteCmd(0x38);
LcdWriteCmd(0x0C);
LcdWriteCmd(0x06);
LcdWriteCmd(0x01);
}
void InterruptTimer0() interrupt 1
{
static unsigned char tmr500ms = 0;
TH0 = T0RH;
TL0 = T0RL;
tmr500ms++;
if(tmr500ms>=50)
{
tmr500ms = 0;
flag500ms = 1;
}
}
多.c文件(1602整屏移动)
nn2.c(LCD1602)
#include<reg52.h>
#define LCD1602_DB P0
sbit LCD1602_RS = P2^0;
sbit LCD1602_RW = P2^1;
sbit LCD1602_E = P1^2;
void delay()
{
unsigned int i;
i=5;
while(--i);
}
void LcdWaitReady()
{
unsigned char sta;
LCD1602_DB = 0xFF;
LCD1602_RS = 0;
LCD1602_RW = 1;
do{
LCD1602_E = 1;
sta = LCD1602_DB;
LCD1602_E = 0;
}while(sta&0x80);
}
void LcdWriteCmd(unsigned char cmd)
{
LcdWaitReady();
LCD1602_RS = 0;
LCD1602_RW = 0;
LCD1602_DB = cmd;
delay();
LCD1602_E = 1;
delay();
LCD1602_E = 0;
}
void LcdWriteDat(unsigned char dat)
{
LcdWaitReady();
LCD1602_RS = 1;
LCD1602_RW = 0;
LCD1602_DB = dat;
delay();
LCD1602_E = 1;
delay();
LCD1602_E = 0;
}
void LcdSetCursor(unsigned char x,unsigned char y)
{
unsigned char addr;
if(y == 0)
addr = 0x00+x;
else
addr = 0x40+x;
LcdWriteCmd(addr | 0x80);
}
void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str,unsigned char len)
{
LcdSetCursor(x,y);
while(len--)
{
LcdWriteDat(*str++);
}
}
void InitLcd1602()
{
LcdWriteCmd(0x38);
LcdWriteCmd(0x0C);
LcdWriteCmd(0x06);
LcdWriteCmd(0x01);
}
nn1,c(主函数)
#include<reg52.h>
bit flag500ms = 0;
unsigned char T0RH = 0;
unsigned char T0RL = 0;
unsigned char code str1[] = " Xin Bao ";
unsigned char code str2[] = "I Love You!";
void ConfigTimer0(unsigned int ms);
extern void InitLcd1602();
extern void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str,unsigned char len);
void main()
{
unsigned char i;
unsigned char index = 0;
unsigned char pdata bufMove1[16+sizeof(str1)+16];
unsigned char pdata bufMove2[16+sizeof(str2)+16];
EA = 1;
ConfigTimer0(10);
InitLcd1602();
for(i=0;i<16;i++)
{
bufMove1 = ' ';
bufMove2 = ' ';
}
for(i=0;i<(sizeof(str1)-1);i++)
{
bufMove1[16+i] = str1;
bufMove2[16+i] = str2;
}
for(i=(16+sizeof(str1)-1);i<sizeof(bufMove1);i++)
{
bufMove1 = ' ';
bufMove2 = ' ';
}
while(1)
{
if(flag500ms)
{
flag500ms = 0;
LcdShowStr(0,0,bufMove1+index,16);
LcdShowStr(0,1,bufMove2+index,16);
index++;
if(index>=(16+sizeof(str1)-1))
{
index = 0;
}
}
}
}
void ConfigTimer0(unsigned int ms)
{
unsigned long tmp;
tmp = 32768000/12;
tmp = (tmp*ms)/1000;
tmp = 65536 - tmp;
tmp = tmp + 13;
T0RH = (unsigned char)(tmp>>8);
T0RL = (unsigned char)tmp;
TMOD &= 0xF0;
TMOD |= 0x01;
TH0 = T0RH;
TL0 = T0RL;
ET0 = 1;
TR0 = 1;
}
void InterruptTimer0() interrupt 1
{
static unsigned char tmr500ms = 0;
TH0 = T0RH;
TL0 = T0RL;
tmr500ms++;
if(tmr500ms>=50)
{
tmr500ms = 0;
flag500ms = 1;
}
}
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