diff --git a/examples/javascript/bmp85.js b/examples/javascript/bmp85.js new file mode 100644 index 0000000..6e73b57 --- /dev/null +++ b/examples/javascript/bmp85.js @@ -0,0 +1,55 @@ +#!/usr/bin/env node + +/* + * Author: Brendan Le Foll + * Copyright (c) 2014 Intel Corporation. + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +var m = require('mraa'); //require mraa + +// helper function to go from hex val to dec +function char(x) { return parseInt(x, 16); } + +x = new m.I2c(0) +x.address(0x77) + +// initialise device +if (x.readReg(char('0xd0')) != char('0x55')) { + console.log("error"); +} + +// we want to read temperature so write 0x2e into control reg +x.writeReg(char('0xf4'), char('0x2e')) + +// read a 16bit reg, obviously it's uncalibrated so mostly a useless value :) +console.log(x.readWordReg(char('0xf6'))) + +// and we can do the same thing with the read()/write() calls if we wished +// thought I'd really not recommend it! +buf = new Buffer(2) +buf[0] = char('0xf4') +buf[1] = char('0x2e') +console.log(buf.toString('hex')) +x.write(buf) + +x.writeByte(char('0xf6')) +d = x.read(2)