075a7b1225
Signed-off-by: Kassandra Perch <the@nodebotani.st> Signed-off-by: Alex Tereschenko <alext.mkrs@gmail.com>
56 lines
1.9 KiB
JavaScript
56 lines
1.9 KiB
JavaScript
#!/usr/bin/env node
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/*
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* Author: Brendan Le Foll <brendan.le.foll@intel.com>
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* Copyright (c) 2014 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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"use strict";
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const mraa = require('mraa'); //require mraa
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let i2cDevice = new mraa.I2c(0);
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i2cDevice.address(0x77);
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// initialise device
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if (i2cDevice.readReg(0xd0) != 0x55) {
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console.log("error");
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}
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// we want to read temperature so write 0x2e into control reg
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i2cDevice.writeReg(0xf4, 0x2e);
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// read a 16bit reg, obviously it's uncalibrated so mostly a useless value :)
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console.log(i2cDevice.readWordReg(0xf6));
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// and we can do the same thing with the read()/write() calls if we wished
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// thought I'd really not recommend it!
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let buf = new Buffer(2);
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buf[0] = 0xf4;
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buf[1] = 0x2e;
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console.log(buf.toString('hex'));
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i2cDevice.write(buf);
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i2cDevice.writeByte(0xf6);
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let result = i2cDevice.read(2);
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console.log(result.toString('hex'));
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