Question

1=Write a program in C to get 16-bit data from Port-D and send it to ports Port-B

2-Write instructions in C to toggle both bits RD7 and RD0 continuously

3-Write instructions in C to get the status of RB2 and put it on RB0

4-Code a simple program in C to send 3499H to Port B and Port D.

Answer 1

1)

DDRD = B11111110; // sets Arduino pins 1 to 7 as outputs, pin 0 as input
DDRD = DDRD | B11111100; // this is safer as it sets pins 2 to 7 as outputs
// without changing the value of pins 0 & 1, which are RX & TX

2)

BCF TRISD, 0
BCF TRISD, 7
H2 BTG PORTD, 0
BTG PORTD, 7
BRA H2

3)

BSF TRISB, 2
BCF TRISB, 0
AGAIN BTFSS PORTB, 2
BRA OVER
BSF PORTB, 0
BRA AGAIN
OVER BCF PORTB, 0
BRA AGAIN

4)

MOVLW 0x3499
MOVWF PORTB
MOVWF PORTD

PLEASE UPVOTE