Deliverables
Return the word file with answer(s) attached after every question.
Rename the submission file with your name and CMS ID i.e. Ali_Haider_182313.doc
Question 1:
Construct a program code using AVR Assembly language to read the value available on PortC
pins and PortD pins. Then multiply the two values and store the result (which is 2 bytes) in the
memory location: 0x50 for LSB byte and 0x51 for MSB byte. Then show the result from LSB
byte on PortB pins.
CODE:
.org 0x00
;Setting I/O register C and D for input
LDI R16,0X00
OUT DDRC,R16
LDI R16,0X00
OUT DDRD,R16
;Setting I/O register B for output
LDI R16,0xFF
OUT DDRB,R16
;getting input from I/O ports
IN R18, PINC
IN R19,PIND
;multiplying the numbers and then storing R0 and R1
MUL R18,R19
; Then copying the LSB and MSB from R0 and R1 to given adresses
STS 0x50,R0
STS 0x51,R1
;Output LSB to I/O register B
OUT PORTB,R0
Question 2:
Calculate the clock cycles of LOOP1, LOOP2 and the overall loop (total cycles) and the size of
delay of the program code below. (Assuming Crystal frequency is 8 MHz)
Instruction Cycles
DELAY: LDI R21, 200 ;1
LOOP2: LDI R20, 250 ;1
LOOP1: NOP ;1
NOP ;1
