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making PORTD as Input/Output PORT.....

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jhon caty

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i am working with PIC18f4550 and using MPLAB C18. I am facing problem in making PORTD as I/O port. plz guide me. THANKS......
 

If you want PORTD to be input port then the code is
Code: 
 TRISD = 0xFF;
. If you want PORTD to be output port then the code is
Code: 
 TRISD = 0x00;
 

i want to initialize some pins of portD as input as some as output .
 

If you want to intialize RD0, RD1, RD2, RD3 as input and RD4, RD5, RD6, RD7 as output then you do like this

Code: 
 TRISD = 0b00001111;
0b tells we are using binary format. 0000 makes RD4-RD7 output. 1111 makes RD0-RD3 as input.

Whichever pin you want as output, you set it 0 and whichever pin you want as input you set it 1.
 
hi jhon caty,
if you use pin as i/p place as '1' , its o/p its place as '0'.
 

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