Raspi Board provides pin mapping functionality for the various Raspberry Pi models. This module is meant to be run on a physical Raspberry Pi only, and maps pins for the specific board it is being run on.
If you have a bug report, feature request, or wish to contribute code, please be sure to check out the Raspi-IO Contributing Guide, which also applies to this project.
npm install raspi-boardThe pins on the Raspberry Pi are a little complicated. There are multiple headers on some Raspberry Pis with extra pins, and the pin numbers are not consistent between Raspberry Pi board versions.
To help make it easier, you can specify pins in three ways. The first is to specify the pin by function, e.g. 'GPIO18'. The second way is to specify by pin number, which is specified in the form "P[header]-[pin]", e.g. 'P1-7'. The final way is specify the Wiring Pi virtual pin number, e.g. 7. If you specify a number instead of a string, it is assumed to be a Wiring Pi number.
Be sure to read the full list of pins on the supported models of the Raspberry Pi.
| Constant | Description |
|---|---|
| VERSION_1_MODEL_A | Constant representing the Raspberry Pi 1 Model A. For use with ```getBoardRevision()``` |
| VERSION_1_MODEL_B_REV_1 | Constant representing the Raspberry Pi 1 Model B Rev 1. For use with ```getBoardRevision()``` |
| VERSION_1_MODEL_B_REV_2 | Constant representing the Raspberry Pi 1 Model B Rev 1. For use with ```getBoardRevision()``` |
| VERSION_1_MODEL_B_PLUS | Constant representing the Raspberry Pi 1 Model B+. For use with ```getBoardRevision()``` |
| VERSION_1_MODEL_A_PLUS | Constant representing the Raspberry Pi 1 Model A+. For use with ```getBoardRevision()``` |
| VERSION_2_MODEL_B | Constant representing the Raspberry Pi 2 Model B. For use with ```getBoardRevision()``` |
| VERSION_UNKNOWN | Constant representing an unknown or unsupported version of the Raspberry Pi. For use with ```getBoardRevision()``` |
Gets the board revision.
Arguments: None.
Returns: A constant representing the board version, one of VERSION_1_MODEL_A, VERSION_1_MODEL_B_REV_1, VERSION_1_MODEL_B_REV_2, VERSION_1_MODEL_B_PLUS, VERSION_1_MODEL_A_PLUS, VERSION_2_MODEL_B, or VERSION_UNKNOWN
Gets a list of all pins for the device it's running on.
Arguments: None.
Returns: An array of pin entry objects structured such that the array index is the Wiring Pi pin number, each with the following structure:
| Property | Type | Description |
|---|---|---|
| pins | Array | An array of all the pin names for pin, e.g. ```['GPIO21', 'SCLK1', 'P1-40']``` |
| peripherals | Array | An array of all the peripherals supported on the pin, and may contain any combination of ```'gpio'```, ```'pwm'```, ```'i2c'```, ```'uart'```, or ```'spi'``` |
Normalizes a pin name to a Wiring Pi pin number. This method accounts for the differences between board revisions by checking which Raspberry Pi the method is being called on.
Arguments:
| Argument | Type | Description |
|---|---|---|
| pin | String | Number | The pin name/number to normalize. If a number is passed in, it is assumed to be the Wiring Pi pin number |
Returns: A number representing the Wiring Pi pin number, or null if an invalid pin name was passed in.
var board = require('raspi-board');
// Prints 14
console.log(board.getPinNumber('SCLK0'));The MIT License (MIT)
Copyright (c) 2014 Bryan Hughes bryan@theoreticalideations.com
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