Question 1:. Find the duration of the delay of each of the code segments below if the crystal frequency is 16 MHz.
|
(a)
|
|
(b)
|
|
|
COUNTER EQU 0x40
|
|
COUNTER1 EQU 0x40
|
|
|
COUNT EQU OxAD
|
|
COUNTER2 EQU 0x41
|
|
|
|
|
COUNT1 EQU OxAD
|
|
|
DELAY MOVLW COUNT
|
|
COUNT2 EQU Ox7E
|
|
|
MOVWF COUNTER
|
|
|
|
|
AGAIN NOP
|
|
DELAY MOVLW COUNT1
|
|
|
NOP
|
|
MOVWF COUNTER1
|
|
|
NOP
|
|
LOOP1 MOVLW COUNT2
|
|
|
DECF COUNTER, BNZ AGAIN
|
F
|
MOVWF COUNTER2 LOOP2 NOP
|
|
|
RETURN
|
|
NOP
|
|
|
|
|
NOP
|
|
|
|
|
DECF COUNTER2,
BNZ LOOP2
|
F
|
|
|
|
DECF COUNTER1,
BNZ LOOP1
|
F
|
|
|
|
RETURN
|
|
Question 2. What are the values of pons C and ID at the end of each of the following ro
|
(a)
|
|
(b)
|
|
|
ORG Ox10
|
|
ORG Ox10
|
|
|
CLRF TRISC
|
|
MOVLW 0x14
|
|
|
CLRF TRISD
|
|
MULLW 0x19
|
|
|
MOVLW Ox80
|
|
MULLW OxIE
|
|
|
MOVWF PORTC MOVLW OxAS MOVWF PORTD
|
|
MOVFF PRODL, MOVFF PRODH, END
|
PORTC
PORTD
|
|
REPEAT RACE PORTC,
|
F
|
|
|
|
BTG PORTD, 5
|
|
|
|
|
BTFSS PORTC,
|
3
|
|
|
|
BRA REPEAT
|
|
|
|
|
HERE GOTO HERE
|
|
|
|
|
END
|
|
|
|
Question 3. Three LEDs are connected to pins 5 to 7 of port C. Write an Assembly program that will add 10 values that it receives through port B one value at a time. Once the sum of the values reaches or exceeds 0'100', one LED should turn on. Once the sum reaches or exceeds D'150', two LEDs should turn on. Finally, when the sum reaches or exceeds D'200', all LEDs should turn on. Verify the operation of your programs using MPLAB simulator. Include printout of the list file and file registers after execution.
Question 4. Write an Assembly program to find the number of ones in file register location 10H. Verify the operation of your programs using MPLAB simulator. Include printout of the list file and file registers after execution.
Question 5. Write a NOS Assembly program that will read 30 values through port B one value at a time. The first 10 values should be stored in addresses 50H to 59H, the second 10 values in addresses 60H to 69H, and the last 10 values in addresses 70H to 79H. Verify the operation of your programs using MPLAB simulator. Include printout of the list file and file registers after execution.