$6$:$23$

$.$ll $5G$

Assignment $1$ Microcontroller

$($Presentation should be given $)$

ANSWER ALL QUESTIONS

Develop a program in assembly language using $8255$ and $8086$ that can control the $12$ V motor to run in forward direction and reverse direction by controlling with DPDT switch. Draw the diagram for relay driver circuit using transistors. Motor has to be connected in port A and switch has to connected in port B $.$ Write the control word value of $8255.$

Port address Port A $=$ FFF$8$H$,$ Port B $=$FFFAH $,$ Port C$=$ FFFC H $,$ control word Register $=$ FFFEH

$($Diagram$,$ main Program marks, control word $1$ marks $=5$ marks $)$

Develop an Arduino program to display seven segment display by pressing a switch. For each time pressed, the display should be increased one digit $0,1,2,$dots$9$ up to nine then return back to zero. $[2\mathrm{.}5$ marks$].$

$3.$Write an assembly language program for performing the following operation of three numbers,

$\frac{?}{\text{b}\text{a}\text{r}}((A+B)**C)$

$(*$ multiplication $)$

The values of $A=$ first two digit of your student ID in hex, $,B=$ last two digit of student ID in hex and $C=05H.$ Write the result in Hex.

$(2\mathrm{.}5$marks$)$

$.$ Execute the program and show the result

Example : student ID is $72S125634$

$A=72H($ first $2$ digit$)$

$,B=12H($ next $2$ digit $to$ letter $)$ and

$C=34H($ last $2$ digit$)$