The document contains questions related to microcontroller programming. Some questions involve turning on and off LEDs using ports and switches, reading and writing data to ports, controlling motors, interfacing with LCD displays, and designing temperature and pressure control systems using sensors. Programming concepts include serial transmission of data bits, stepper motor control, interrupt handling, and interfacing with keypads.

1. 1. ON OFF LED through a switch?
2. ON OFF LED Sequentially with PORTB
3. Display Seven segments from 0 to 9?
4.
5. read data byte on port C and send it on port B?
6. read data byte on portc and send it on portb in inverted form?
7. out a byte of data 0xAA on portb.f0 serially one bit at a time. LSB should go first
continuously?
8. out a byte of data 0x45 on portb.f0 serially one bit at a time MSB should go first
(continuously)?
9. in byte of data on portb .f0 serially one bit a time continuously MSB Should
come first?
10. in a byte of data through Portb.f0 serially one bit at a time LSB should
come first?
11. ON OFF a 220V bulb through a switch?
12. control the direction of DCMOTOR portC through a switch on Portb?
13. move a stepper motor for 30degree?
14. Design a circuit to control the direction of stepper motor [full torque] .
15. write “ kicsit ” On LCD screen use Any port ?
16. write “kicsit” On LCD screen using port b only?
17. Design a program to of Pressure controller using pressure switch.
18. write a program to count the number of Person Entering In a gate, And display
the result on the screen (LCD);
19. Design a temperature control system for furnace. Two temperature switches are
installed in a furnace to measure the hot and cold of furnace
20. Design a interface of keypad and display on LCD.
21. design the interface of stepper motor to control the direction of stepper motor
with Key pad?
22. Design a interface of stepper motor with microcontroller Degree of circular
motion is Entered from keypad and displayed on LCD

2. Assignment No 2 Microcontroller
Page | 1
Q .1 Write a program to ON OFF LED trough a switch?
void main ()
{
trisc.f0=0;
trisb.f0=1;
portc.f0=0;
while(1)
{
if(portb.f0==1)
{
portc.f0=1;
}
else
{
portc.f0=0;
}
}
}

3. Assignment No 2 Microcontroller
Page | 2
Q .2 Write a program to ON OFF LED Sequentially with PORTB.
void main(void)
{
trisb=0x00;
portb=0x00;
while(1)
{
portb.f0=1;
Delay_ms(100);
portb.f0=0;
portb.f1=1;
Delay_ms(100);
portb.f1=0;
portb.f2=1;
Delay_ms(100);
portb.f2=0;
portb.f3=1;
Delay_ms(100);
portb.f3=0;
portb.f4=1;
Delay_ms(100);
portb.f4=0;
portb.f5=1;
Delay_ms(100);
portb.f5=0;
portb.f6=1;
Delay_ms(100);
portb.f6=0;
portb.f7=1;
Delay_ms(100);
portb.f7=0;
}
}

4. Assignment No 2 Microcontroller
Page | 3
Q. 3 write a program to Display Seven segments from 0 to 9?
void main ()
{
unsigned char n[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
int i;
trisc=0;
portc=0;
while(1)
{
for(i=0;i<10;i++)
{
portc=n[i];
delay_ms(300);
}
}
}

5. Assignment No 2 Microcontroller
Page | 4
Q5. Write a program to read data byte on port C and send it on port B?
Void main()
{
TRISC=0;
TRISB=1;
While(1){
Portb=portc;
}
}

6. Assignment No 2 Microcontroller
Page | 5
Q6. Write a program to read data byte on portc and send it on portb in inverted form?
Void main()
{
TRISC=0;
TRISB=1;
While(1){
Port B= ~ port C;
}
}

7. Assignment No 2 Microcontroller
Page | 6
Q 7 Write a program to out a byte of data 0xAA on portb.f0 serially one bit at a time.
LSB should go first continuously?
void main ()
{
int i=0;
unsigned char a;
unsigned char x=0xaa;
trisb.f0=0;
portb.f0=0;
a=x;
while(1)
{
portb.f0=a;
delay_ms(200);
a=a>>1;
if(i==8)
{
a=x;
i=0;
}
i=i+1;
}}

8. Assignment No 2 Microcontroller
Page | 7
Q 8 write a program to out a byte of data 0x45 on portb.f0 serially one bit at a time
MSB should go first (continuously)?
void main ()
{
int i=7;
unsigned char a=0x45;
unsigned char x=0x45;
a=x;
trisb.f0=0;
while(1)
{
a=a>>i;
portb.f0=a;
delay_ms(200);
a=x;
i--;
if(i<0)
{
i=7;
}
}
}
Q9 write a program to in byte of data on portb .f0 serially one bit a time continuously
MSB Should come first?
Void main()
{
Unsigned char bitdata;
Int i=0;
TRISB.F0=1;
PORTB.F0=0;
While (i!=8)
{
Bitdata=PORTB.F0;
Bitdata=bitdata<<1;
I++;
}
}
Q10 .write a program to in a byte of data through Portb.f0 serially one bit at a time LSB
should come first?
Void main()
{
TRISB=1;
PORTB=0;
While(i!=8)
{
Bitdata=PORTB.F0; // Lsb come first
Bitdata=Bitdata<<1; //at the end we get inverted form

9. Assignment No 2 Microcontroller
Page | 8
I++;
}
I=0;
Unsigned char temp;
While(i!=8)
{
Temp=Bitdata;
Temp=Temp<<1;
Bitdata=Bitdata>>1;
}
}
Q 11write a program to ON OFF a 220V bulb through a switch?
void main()
{
trisc=0;
portc=0;
trisb.f0=1;
while(1)
{
if(portb.f0==1)
{
portc.f0=1;
}
else
portc.f0=0;
}
}

10. Assignment No 2 Microcontroller
Page | 9
Q 12 writes a program to control the direction of DCMOTOR portC through a switch
on Portb?
#define sw1 portb.f0
#define sw2 portb.f1
#define ON 1
#define OFF 0
void main()
{
TRISB=1;
portb=0;
TRISC=0;
while (1)
{
if(sw1==ON)
{ portc.f3=OFF;
portc.f1=OFF;
Delay_ms(10);
portc.f0=ON;
portc.f2=ON;
delay_ms(200);
}
if(sw2==ON)
{
portc.f0=OFF;
portc.f2=OFF;
delay_ms(10);
portc.f3=ON;
portc.f1=ON;
delay_ms(100);
}
}
}
C0 C1 C2 C3 DIRECTION
1 0 1 0 CLOCKWICE
0 1 0 1 ANTICLOCKWISE

11. Assignment No 2 Microcontroller
Page | 10
Q13 write a program to move a stepper motor for 30degree?
Speciation of stepper motor .1deg/step
Calculation
.1 degree = 1 step
1deg =1/.1 step
30 deg = 30/0.1step => 300 steps 300 / 4 =75
Void main ()
{
trisc=0;
portc=0;
inti,j=0;
unsigned char a[4]={0x01,0x02,0x04,0x08};
while(1)
{
for(i=0;i<75;i++)
{
for(j=0;j<4;j++)
{
portc=a[j];
delay_ms(100);
//portc=0;
}
//portc=0;
}
}
}

12. Assignment No 2 Microcontroller
Page | 11
Q14 Design a circuit to control the direction of stepper motor [full torque] .
void step(unsigned char x)
{
portc=x;
delay_ms(200);
//portc=0x00;
}
void step1(unsigned char y)
{
portc=y;
delay_ms(200);
//portc=0x00;
}
void main()
{
unsigned char n[4]= {0x01,0x02,0x04,0x08};
unsigned char u[4]= {0x08,0x04,0x02,0x01};
unsignedinti,j,k,l;
trisc=0;
portc=0;
while(1){
for(i=1; i<5; i++)

13. Assignment No 2 Microcontroller
Page | 12
{
for(j=0; j<4; j++)
{
step(n[j]);
}
}
delay_ms(100);
portc=0;
for(k=1; k<5; k++)
{
for(l=0; l<4; l++)
{
step1(u[l]);
}
}
}
}
Q15 write a program to write “ kicsit ” On LCD screen use Any port ?
#define datalineportd
#define rs portc.f0
#define e portc.f1
void command(unsigned char x)
{
e=0;
rs=0;
dataline=x;
e=1;

14. Assignment No 2 Microcontroller
Page | 13
delay_ms(50);
e=0;
}
void data(unsigned char y)
{
e=0;
rs=1;
dataline=y;
e=1;
delay_ms(50);
e=0;
}
void main()
{
trisd=0x00;
trisc.f0=0;
trisc.f1=0;
command(0x38);
command(0x06);
command(0x0c);
command(0x01);
while(1)
{
command(0x80);
data('B');
command(0xc0);
data('A');
command(0x82);
data('B');
command(0xc2);
data('R');
command(0x84);
data('U');
command(0x85);
data(' ');
command(0x86);
data(' ');

15. Assignment No 2 Microcontroller
Page | 14
command(0x87);
data('D');
command(0x88);
data('O');
command(0x89);
data('N');
}
}
Q 16 writes a program to write “kicsit” On LCD screen using port b only?
[We solve it through command]
void main(void)
{
TRISD=0x00;
LCD_Init(&PORTD);
Lcd_Cmd(Lcd_Clear);
Lcd_Out(1,1,"KICSIT");
While(1){
}
}
Q 17 Design a program to of Pressure controller using pressure switch.
Specification of Pressure switch
100 baar =break (OFF =0)
50 baar =Make (ON 1)
sbit LCD_RS at RD3_bit;
sbit LCD_EN at RD2_bit;
sbit LCD_D7 at RD7_bit;
sbit LCD_D6 at RD6_bit;
sbit LCD_D5 at RD5_bit;
sbit LCD_D4 at RD4_bit;
// Pin direction
sbitLCD_RS_Direction at TRISD3_bit;
sbitLCD_EN_Direction at TRISD2_bit;
sbit LCD_D7_Direction at TRISD7_bit;
sbit LCD_D6_Direction at TRISD6_bit;
sbit LCD_D5_Direction at TRISD5_bit;
sbit LCD_D4_Direction at TRISD4_bit;
int flag=0;
void interrupt(void);
void main() {
char key;
INTCON=0x90;
//INTCON3=0x08;
INTCON2.INTEDG0=1;

16. Assignment No 2 Microcontroller
Page | 15
//INTCON2.INTEDG1=1;
TRISB=0X0F;
TRISC=0X00;
//trisd=0;
//TRISC=0;
Lcd_Init();
//Lcd_Out(1,4,"Well Come");
while(1)
{
}
}
void interrupt(void)
{
if(INTCON.INT0IF==1 && flag==0)
{
Lcd_Cmd(_LCD_CLEAR);
Lcd_Out(1,1,"Motor is OFF");
//Lcd_Out(2,4,scount );
INTCON.INT0IF=0;
INTCON2.INTEDG0=0;
flag=1;
PORTC.f0=0;
// PORTC.F0=~PORTC.F0;
}
if(INTCON.INT0IF==1 && flag==1)
{
Lcd_Cmd(_LCD_CLEAR);
Lcd_Out(1,1,"Motor is ON");
//Lcd_Out(2,4,scount );
PORTC.f0=1;
INTCON.INT0IF=0;
flag=0;
INTCON2.INTEDG0=1;
// PORTC.F0=~PORTC.F0;
}
}

17. Assignment No 2 Microcontroller
Page | 16
Q18 write a program to count the number of Person Entering In a gate, And display
the result on the screen (LCD);
sbit LCD_RS at RD3_bit;
sbit LCD_EN at RD2_bit;
sbit LCD_D7 at RD7_bit;
sbit LCD_D6 at RD6_bit;
sbit LCD_D5 at RD5_bit;
sbit LCD_D4 at RD4_bit;
// Pin direction
sbitLCD_RS_Direction at TRISD3_bit;
sbitLCD_EN_Direction at TRISD2_bit;
sbit LCD_D7_Direction at TRISD7_bit;
sbit LCD_D6_Direction at TRISD6_bit;
sbit LCD_D5_Direction at TRISD5_bit;
sbit LCD_D4_Direction at TRISD4_bit;
int count=0;
charscount[10];
void interrupt(void);
void main() {
char key;
INTCON=0x90;
INTCON2.INTEDG0=1;
TRISB=0X0F;
//TRISC=0X00;
//trisd=0;
//TRISC=0;
Lcd_Init();
//Lcd_Out(1,4,"Well Come");

18. Assignment No 2 Microcontroller
Page | 17
while(1)
{
}
}
void interrupt(void)
{
if(INTCON.INT0IF)
{
count++;
IntToStr(count,scount);
Lcd_Out(1,1,"Count =");
Lcd_Out(2,4,scount );
INTCON.INT0IF=0;
// PORTC.F0=~PORTC.F0;
}
}
Q19 Design a temperature control system for furnace. Two temperature switches are
installed in a furnace to measure the hot and cold of furnace
HOT>100 output = 1;
Cold<35 output=1;
sbit LCD_RS at RD3_bit;
sbit LCD_EN at RD2_bit;
sbit LCD_D7 at RD7_bit;
sbit LCD_D6 at RD6_bit;
sbit LCD_D5 at RD5_bit;
sbit LCD_D4 at RD4_bit;
// Pin direction
sbitLCD_RS_Direction at TRISD3_bit;
sbitLCD_EN_Direction at TRISD2_bit;

19. Assignment No 2 Microcontroller
Page | 18
sbit LCD_D7_Direction at TRISD7_bit;
sbit LCD_D6_Direction at TRISD6_bit;
sbit LCD_D5_Direction at TRISD5_bit;
sbit LCD_D4_Direction at TRISD4_bit;
void interrupt(void);
void main() {
char key;
INTCON=0x90;
INTCON3=0x08;
INTCON2.INTEDG0=1;
INTCON2.INTEDG1=1;
TRISB=0X0F;
TRISC=0X00;
//trisd=0;
//TRISC=0;
Lcd_Init();
//Lcd_Out(1,4,"Well Come");
while(1)
{
}
}
void interrupt(void)
{
if(INTCON.INT0IF)
{
Lcd_Cmd(_LCD_CLEAR);
Lcd_Out(1,1,"Motor is OFF");
//Lcd_Out(2,4,scount );
INTCON.INT0IF=0;
PORTC=0X00;
// PORTC.F0=~PORTC.F0;
}
if(INTCON3.INT1IF)
{
Lcd_Cmd(_LCD_CLEAR);
Lcd_Out(1,1,"Motor is ON");
//Lcd_Out(2,4,scount );
PORTC=0XFF;
INTCON3.INT1IF=0;
// PORTC.F0=~PORTC.F0;
}
}

20. Assignment No 2 Microcontroller
Page | 19
Q20 Design a interface of keypad and display on LCD.
Q21 design the interface of stepper motor to control the direction of stepper
motor with Key pad?
1 > Anticlockwise
2> Clockwise
sbit LCD_RS at RD3_bit;
sbit LCD_EN at RD2_bit;
sbit LCD_D7 at RD7_bit;
sbit LCD_D6 at RD6_bit;
sbit LCD_D5 at RD5_bit;
sbit LCD_D4 at RD4_bit;
// Pin direction
sbitLCD_RS_Direction at TRISD3_bit;
sbitLCD_EN_Direction at TRISD2_bit;
sbit LCD_D7_Direction at TRISD7_bit;
sbit LCD_D6_Direction at TRISD6_bit;
sbit LCD_D5_Direction at TRISD5_bit;
sbit LCD_D4_Direction at TRISD4_bit;
clockmotor();
void main() {
char key;
TRISB=0XF0;
TRISC=0X00;
trisd=0;
Lcd_Init();
Lcd_Out(1,4,"Well Come");
//Lcd_Out(2,1,"Press Any Key");

21. Assignment No 2 Microcontroller
Page | 20
Lcd_cmd(_Lcd_clear);
m:
Lcd_Out(1,1,"1 : For ClockWise :");
Lcd_Out(2,1,"2 : For AntiClockWise :");
while(1)
{
portb=0xf1;
if(portb.f4==1)
{
//Lcd_Out(1,6,"7");
goto m;
}portb=0xf4;
if(portb.f4==1)
{
//Lcd_Out(1,6,"1");
Lcd_cmd(_lcd_clear);
lcd_out(1,1,"7 : To main");
Lcd_out(2,1,"Clockwise");
while(1){
PORTC.F0 = 1;
delay_ms(50);
PORTC.F0 = 0;
PORTC.F1 = 1;
delay_ms(50);
PORTC.F1 = 0;
PORTC.F2 = 1;
delay_ms(50);
PORTC.F2 = 0;
PORTC.F3 = 1;
DELAY_MS(50);
PORTC.F3 = 0;
portb=0xf1;
if(portb.f4==1)
{
//Lcd_Out(1,6,"7");
goto m;
}
}
}
if(portb.f5==1)
{
Lcd_cmd(_lcd_clear);
lcd_out(1,1,"7 : To main");
Lcd_Out(2,1,"AntiClockwise");
while(1){
PORTC.F3 = 1;

22. Assignment No 2 Microcontroller
Page | 21
delay_ms(50);
PORTC.F3 = 0;
PORTC.F2 = 1;
delay_ms(50);
PORTC.F2 = 0;
PORTC.F1 = 1;
delay_ms(50);
PORTC.F1 = 0;
PORTC.F0 = 1;
DELAY_MS(50);
PORTC.F0 = 0;
portb=0xf1;
if(portb.f4==1)
{
//Lcd_Out(1,6,"7");
goto m;
}}
}
} }
Q22 Design a interface of stepper motor with microcontroller Degree of circular motion
is Entered from keypad and displayed on LCD