Open jadonk opened 6 years ago
jadonk
commented
6 years ago Which pins do you have connected? https://github.com/jadonk/bonescript/blob/7e5e6e72ce821b8cec36748adaa60f3814f97d51/src/bone.js#L1535 shows the pin mapping for the various port selections.
jadonk
commented
6 years ago From @snidera on March 11, 2014 13:14
P9 19 & 20 (Now I understand why i2c-2 in bonescript = port 1 in i2c tools). i2cdetect -r 1 shows the device(s) at the proper address
I have 3 MCP23017 connected, I want to have n connected & have the program adjust. The following code functions as expected, but is condensed to save space. I can control the 3 MCPs from a web page (click button, turn on output for 500ms)
var app = require('http').createServer(handler).listen(8090);
var io = require('socket.io').listen(app);
var fs = require('fs');
var b = require('bonescript');
var port = '/dev/i2c-2';
var mcp = [0x20,0x21,0x22]; //This is where I want to use i2cScan to detect n MCPs
for (var i=0,len=mcp.length; i<len; i++){
b.i2cOpen(port, mcp[i], {});
b.i2cWriteBytes(port, 0x12, [0x00]);
b.i2cWriteBytes(port, 0x00, [0x00]);
b.i2cWriteBytes(port, 0x13, [0x00]);
b.i2cWriteBytes(port, 0x01, [0x00]);
}
io.sockets.on('connection', function (socket) {
socket.on('FIRE', function (data) {
var delay = 500;
b.i2cOpen(port, data.ADDRESS, {});
b.i2cWriteBytes(port, data.BANK, [data.VALUE]);
setTimeout(function() {b.i2cWriteBytes(port, data.BANK, [0x00])},delay);
});
});
function handler (req,res) {
fs.readFile('Javascript/sock123/index.html',
function (err, data) {
res.writeHead(200);
res.end(data);
});
}.
From @snidera on March 4, 2014 20:31
i2cscan is returning an empty array on '/dev/i2c-2', when I have a device connected at 0x20 & 0x21 (and can read/write to both via another script & i2cdetect -r 1 shows both)
Clean 9/4 image installed yesterday. Tried both before & after updated to bonescript 0.2.4
I've modified the 'test-i2c' from github as follows:
var b = require('bonescript'); var port = '/dev/i2c-2';
b.i2cOpen(port); b.i2cScan(port, onScan);
function onScan(err, data) { console.log('scan = ' + JSON.stringify(arguments)); }
If I run it using '/dev/i2c-0', I get the same output as 'test-i2c' (data=[52,80])
scan = {"0":{"err":null,"data":[52,80],"event":"callback"}} scan = {"0":{"event":"return","return":[ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,52,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, 80,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1]}}
If I run on /dev/i2c-1 or /dev/i2c-2, I get an empty array in data.
scan = {"0":{"err":null,"data":[],"event":"callback"}} scan = {"0":{"event":"return","return":[ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1]}}
What am I doing wrong?
Copied from original issue: jadonk/bonescript#77