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Reduce GPIO setup on Pi node to try to make it play nice with other peripherals

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This commit is contained in:
Dave C-J 2014-05-06 20:58:36 +01:00
parent d1318d215c
commit fb0cae0935
1 changed files with 31 additions and 31 deletions
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62
nodes/core/hardware/36-rpi-gpio.js
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@ -18,15 +18,15 @@ module.exports = function(RED) {
var util = require("util"); var util = require("util");
var exec = require('child_process').exec; var exec = require('child_process').exec;
var fs = require('fs'); var fs = require('fs');
if (!fs.existsSync("/dev/ttyAMA0")) { // unlikely if not on a Pi if (!fs.existsSync("/dev/ttyAMA0")) { // unlikely if not on a Pi
throw "Info : Ignoring Raspberry Pi specific node."; throw "Info : Ignoring Raspberry Pi specific node.";
} }
if (!fs.existsSync("/usr/local/bin/gpio")) { // gpio command not installed if (!fs.existsSync("/usr/local/bin/gpio")) { // gpio command not installed
throw "Info : Can't find Raspberry Pi wiringPi gpio command."; throw "Info : Can't find Raspberry Pi wiringPi gpio command.";
} }
// Map physical P1 pins to Gordon's Wiring-Pi Pins (as they should be V1/V2 tolerant) // Map physical P1 pins to Gordon's Wiring-Pi Pins (as they should be V1/V2 tolerant)
var pintable = { var pintable = {
// Physical : WiringPi // Physical : WiringPi
@ -68,15 +68,15 @@ module.exports = function(RED) {
"15":"8", "15":"8",
"16":"10" "16":"10"
} }
function GPIOInNode(n) { function GPIOInNode(n) {
RED.nodes.createNode(this,n); RED.nodes.createNode(this,n);
this.buttonState = -1; this.buttonState = -1;
this.pin = pintable[n.pin]; this.pin = pintable[n.pin];
this.intype = n.intype; this.intype = n.intype;
var node = this; var node = this;
if (this.pin) { if (node.pin) {
exec("gpio mode "+node.pin+" "+node.intype, function(err,stdout,stderr) { exec("gpio mode "+node.pin+" "+node.intype, function(err,stdout,stderr) {
if (err) node.error(err); if (err) node.error(err);
else { else {
@ -99,20 +99,20 @@ module.exports = function(RED) {
}); });
} }
else { else {
this.error("Invalid GPIO pin: "+this.pin); node.error("Invalid GPIO pin: "+node.pin);
} }
this.on("close", function() { node.on("close", function() {
clearInterval(this._interval); clearInterval(node._interval);
}); });
} }
function GPIOOutNode(n) { function GPIOOutNode(n) {
RED.nodes.createNode(this,n); RED.nodes.createNode(this,n);
this.pin = pintable[n.pin]; this.pin = pintable[n.pin];
var node = this; var node = this;
if (this.pin) { if (node.pin) {
process.nextTick(function() { process.nextTick(function() {
exec("gpio mode "+node.pin+" out", function(err,stdout,stderr) { exec("gpio mode "+node.pin+" out", function(err,stdout,stderr) {
if (err) node.error(err); if (err) node.error(err);
@ -133,27 +133,27 @@ module.exports = function(RED) {
}); });
} }
else { else {
this.error("Invalid GPIO pin: "+this.pin); node.error("Invalid GPIO pin: "+node.pin);
} }
this.on("close", function() { node.on("close", function() {
exec("gpio mode "+this.pin+" in"); exec("gpio mode "+node.pin+" in");
}); });
} }
exec("gpio mode 0 in",function(err,stdout,stderr) { //exec("gpio mode 0 in",function(err,stdout,stderr) {
if (err) { // if (err) {
util.log('[36-rpi-gpio.js] Error: "gpio" command failed for some reason.'); // util.log('[36-rpi-gpio.js] Error: "gpio" command failed for some reason.');
} // }
exec("gpio mode 1 in"); // exec("gpio mode 1 in");
exec("gpio mode 2 in"); // exec("gpio mode 2 in");
exec("gpio mode 3 in"); // exec("gpio mode 3 in");
exec("gpio mode 4 in"); // exec("gpio mode 4 in");
exec("gpio mode 5 in"); // exec("gpio mode 5 in");
exec("gpio mode 6 in"); // exec("gpio mode 6 in");
exec("gpio mode 7 in"); // exec("gpio mode 7 in");
}); //});
RED.nodes.registerType("rpi-gpio in",GPIOInNode); RED.nodes.registerType("rpi-gpio in",GPIOInNode);
RED.nodes.registerType("rpi-gpio out",GPIOOutNode); RED.nodes.registerType("rpi-gpio out",GPIOOutNode);
} }