Any microcontroller based system typically has an input and a corresponding output. Taking simple output with a PIC microcontroller has been explained in LED blinking with PIC18F4550. This article explains how to provide an input to the controller and get a corresponding output using PIC18F4550.
PIC18F4550 has a total of 35 I/O (input-output) pins which are distributed among 5 Ports. Each Port of a PIC microcontroller corresponds to three 8-bit registers (TRIS, PORT & LAT) which should be configured to use the Port for general I/O purpose. For more details, refer LED blinking using PIC.
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TRISD
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Bit 7
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Bit 6
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Bit 5
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Bit 4
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Bit 3
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Bit 2
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Bit 1
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Bit 0
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Value
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1
|
1
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1
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1
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1
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1
|
1
|
1
|
|
TRISD
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Bit 7
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Bit 6
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Bit 5
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Bit 4
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Bit 3
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Bit 2
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Bit 1
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Bit 0
|
|
Value
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–
|
–
|
–
|
–
|
–
|
1
|
–
|
–
|
· To set 1st pin (RD0) as output and 4th pin (RD3) of PortD as input
For more detail: How to take input with PIC18F4550 Microcontroller
The post How to take input with PIC18F4550 Microcontroller appeared first on PIC Microcontroller.