help with pic16f84a

freesprited said:

are there any compilers that you can download and use for PIC16F84A.
it is one of my subjects at uni and i needed a hand with it.

when stetting up the ports, if we want porta set up as inputs and port b as upper 4 bits as inputs and lower 4 bits as outputs.........
why is it set up in the following manner?


f equ 1
w equ 0
porta equ 5
trisa equ 85
porta equ 6
trisa equ 86

Click to expand...

	org	0x0005
INIT	CLRF	PORTA
	CLRF	PORTB
	BSF	STATUS,RP0
	MOVLW	b'00001111'	;direction Port A
	MOVWF	TRISA
	MOVLW	b'00000000'	;direction Port B
	MOVWF	TRISB
	BCF	STATUS,RP0
	MOVLW     b'01010000'
           MOVWF     PORTA

freesprited said:

are there any compilers that you can download and use for PIC16F84A.
it is one of my subjects at uni and i needed a hand with it.

when stetting up the ports, if we want porta set up as inputs and port b as upper 4 bits as inputs and lower 4 bits as outputs.........
why is it set up in the following manner?


f equ 1
w equ 0
porta equ 5
trisa equ 85
porta equ 6
trisa equ 86

Click to expand...