六、软件源码
C语言代码：
#include<reg51.h>
sfr mydata = 0x90;
sbit rd= P2^5;
sbit wr= P2^6;
sbit intr= P2^7;
sbit RS = P2^0;
sbit EN = P2^1;
//(0x90)is address of port1, else you can write as : #defintre mydata P1
void delay(int n)
{
int i,j;
for(i=0;i<n;i++)
for(j=0;j<255;j++);
}
void lcd_cmd(char a)
{
P3 = a;
RS = 0;
EN = 1;
delay(10);
EN = 0;
}
void lcd_data(char a)
{
P3 = a;
RS = 1;
EN = 1;
delay(10);
EN = 0;
}
void display(char *ptr)
{
while(*ptr != '\0')
{
lcd_data(*ptr);
ptr++;
}
}
void main()
{
unsigned char value;
char temp[4];
int i=0;
lcd_cmd(0x01); //clear screen
lcd_cmd(0x0E); //Display On, Cursor Blinking
lcd_cmd(0x38); //2 lines and 5*7 matrix
lcd_cmd(0x80); //Force Cursor to beginning of first line
display("ADC Value=");
lcd_cmd(0xC0); //Force Cursor to beginning of second line
//mydata = 0xEF;
intr = 1;
rd = 1;
wr = 1;
while(1)
{
i = 0;
while(intr == 1);
rd = 0;
value = mydata;
while(i < 3)
{
temp[i] = (value % 10) + '0';
value = value / 10;
i++;
}
for (i = 2; i >= 0; i--)
{
lcd_cmd(0x06); //Force Cursor to the next address(move to right)
lcd_data(temp[i]);
}
rd = 1;
delay(100);
lcd_cmd(0xC0); //Force Cursor to beginning of second line
wr = 0;
wr = 1;
}
}
六、软件源码
C语言代码：
#include<reg51.h>
sfr mydata = 0x90;
sbit rd= P2^5;
sbit wr= P2^6;
sbit intr= P2^7;
sbit RS = P2^0;
sbit EN = P2^1;
//(0x90)is address of port1, else you can write as : #defintre mydata P1
void delay(int n)
{
int i,j;
for(i=0;i<n;i++)
for(j=0;j<255;j++);
}
void lcd_cmd(char a)
{
P3 = a;
RS = 0;
EN = 1;
delay(10);
EN = 0;
}
void lcd_data(char a)
{
P3 = a;
RS = 1;
EN = 1;
delay(10);
EN = 0;
}
void display(char *ptr)
{
while(*ptr != '\0')
{
lcd_data(*ptr);
ptr++;
}
}
void main()
{
unsigned char value;
char temp[4];
int i=0;
lcd_cmd(0x01); //clear screen
lcd_cmd(0x0E); //Display On, Cursor Blinking
lcd_cmd(0x38); //2 lines and 5*7 matrix
lcd_cmd(0x80); //Force Cursor to beginning of first line
display("ADC Value=");
lcd_cmd(0xC0); //Force Cursor to beginning of second line
//mydata = 0xEF;
intr = 1;
rd = 1;
wr = 1;
while(1)
{
i = 0;
while(intr == 1);
rd = 0;
value = mydata;
while(i < 3)
{
temp[i] = (value % 10) + '0';
value = value / 10;
i++;
}
for (i = 2; i >= 0; i--)
{
lcd_cmd(0x06); //Force Cursor to the next address(move to right)
lcd_data(temp[i]);
}
rd = 1;
delay(100);
lcd_cmd(0xC0); //Force Cursor to beginning of second line
wr = 0;
wr = 1;
}
}