2.7V 4-Channel 12-Bit A/D Converters with SPI™ Serial Interface
MCP3204.cpp
- Committer:
- stjo2809
- Date:
- 2015-03-23
- Revision:
- 0:b5950cd5e330
File content as of revision 0:b5950cd5e330:
/* mbed MCP3204 Library, for driving the 2.7V 4-Channel/8-Channel 12-Bit A/D Converters with SPI™ Serial Interface * Copyright (c) 2015, Created by Steen Joergensen (stjo2809) * * 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. */ #include "mbed.h" #include "MCP3204.h" //============================================================================= // Public functions //============================================================================= MCP3204::MCP3204(SPI& spi, PinName nCs) : _spi(spi), _nCs(nCs) { } MCP3204::MCP3204(PinName mosi, PinName miso,PinName sck, PinName nCs) : _mosi(mosi), _miso(miso), _sck(sck), _nCs(nCs) { SPI _spi(_mosi,_miso,_sck); } int MCP3204::sgl(char channel) { return _read(SINGLE, channel); } int MCP3204::diff(char channel) { return _read(DIFFERENTIAL, channel); } //============================================================================= // Private functions //============================================================================= int MCP3204::_make_value_from_responce(int _msb, int _lsb) { --- code --- } int MCP3204::_read(char sgl_or_diff, char channel) { _make_value_from_responce(int responce_msb, int responce_lsb); _nCs = 0; _spi.write(sgl_or_diff); int responce_msb = _spi.write(channel); int responce_lsb = _spi.write(0xff); // don't care bits _nCs = 1; int responce = _make_value_from_responce(responce_msb, responce_lsb); return responce; }