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- Bài Tập Bài 3
- Bài 4: LCD
- Bài 4: LCD
VC C
5V
R 1 10K LCD16x02
1
C 6
J1
5V LC D
104
9
8
7
6
5
4
3
2
9
8
7
6
5
4
3
2
1
10
16
15
14
13
12
11
10
U 1
40
EN
Rw
RS
1 39
2 P 1 .0 P 0 .0 /A D 0 38
VC C
3 P 1 .1 P 0 .1 /A D 1 37 5V
4 P 1 .2 P 0 .2 /A D 2 36
5 P 1 .3 P 0 .3 /A D 3 35
6 P 1 .4 P 0 .4 /A D 4 34
+ C 3 7 P 1 .5 P 0 .5 /A D 5 33
C A P A C IT O R P O L 8 P 1 .6 P 0 .6 /A D 6 32
9 P 1 .7 P 0 .7 /A D 7 31
10 R ST E A /V P P 30 R 2
11 P 3 .0 /R XD A L E /P R O G 29
P 3 .1 /T X D PSEN 5K
12 28 D 7
R 3 13 P 3 .2 /IN T 0 P 2 .7 /A 1 5 27 D 6
10K 14 P 3 .3 /IN T 1 P 2 .6 /A 1 4 26 D 5
15 P 3 .4 /T 0 P 2 .5 /A 1 3 25 D 4
16 P 3 .5 /T 1 P 2 .4 /A 1 2 24 D 3
17 P 3 .6 /W R P 2 .3 /A 1 1 23 D 2
18 P 3 .7 /R D P 2 .2 /A 1 0 22 D 1
19 XTA L2 P 2 .1 /A 9 21 D 0
XTA L1 P 2 .0 /A 8
GN D
Y 1
12M hz A T89C 51
20
C 2 C 1
33p 33p
Rw RS
EN
- Bài 4: LCD
#include
#include
#define LCDdata P2
sbit BF=P2^7;
sbit RS=P3^7;
sbit RW=P3^6;
sbit EN=P3^5;
- Bài 4: LCD
void wait(void)
{
LCDdata=0xff;
while(BF){EN=0;delay(100);EN=1;delay(100);}
RW=0;
}
- Bài 4: LCD
void LCDwrite(unsigned char c)
{
EN=1;
RS=1;
RW=1;
wait();
LCDdata=c;
EN=0;
}
- Bài 4: LCD
void LCDcontrol(unsigned char x)
{
EN=1;
RS=0;
RW=1;
wait();
LCDdata=x;
EN=0;
}
- Bài 4: LCD
void LCDinit(void)
{
LCDcontrol(0x30);
LCDcontrol(0x30);
LCDcontrol(0x30);
LCDcontrol(0x38);//2 dong ma tran 5x7
LCDcontrol(0x0c);//bat con tro
LCDcontrol(0x06); //tang con tro sang fai
LCDcontrol(0x01); //xoa man hinh
}
- Bài 4: LCD
void LCDputs(unsigned char *s,unsigned char
row)
{
int len;
if(row==1)LCDcontrol(0x80);
else LCDcontrol(0xc0);
len=strlen(s);
while(len!=-1)
{
LCDwrite(*s);delay(5000);
len--;
s++ ;
}
}
- Bài 4: LCD
void LCDwritei(int d)
{
int i,j,k,l;
i=d%10;
d=d/10;
j=d%10;
d=d/10;
k=d%10;
l=d/10;
LCDwrite(l);
LCDwrite(k);
LCDwrite(j);
LCDwrite(i);
}
- void main(void)
{
// char x;
// P2=0x00;
LCDinit();
LCDputs(“DKS_Group",1);
LCDputs(“BKHN",2);
delay(30000);
while(1)
{
}
}
- Bài 3: LED_7_SEG
void display(int x)
{
convert(x);
P0=0x00;led1=1; P1 = maled7[i]; delay(100);
P0=0x00;led2=1; P1 = maled7[j]; delay(100);
P0=0x00;led3=1; P1 = maled7[k]; delay(100);
P0=0x00;led4=1; P1 = maled7[l]; delay(100);
}
- Bài 3: LED_7_SEG
void main()
{
while(1)
{
display(1234);
}
}
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