2.7V 4-Channel 12-Bit A/D Converters with SPI™ Serial Interface
Fork of MCP3204 by
MCP3204.h
- Committer:
- stjo2809
- Date:
- 2015-03-23
- Revision:
- 0:b5950cd5e330
- Child:
- 1:cf7328552994
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" #ifndef MBED_MCP3204_H #define MBED_MCP3204_H //============================================================================= // Declaration of variables & custom #defines //============================================================================= #define CH0 0x00 // Channel 0 for single and for differential is CH0 = IN+ and CH1 = IN- #define CH1 0x40 // Channel 1 for single and for differential is CH0 = IN- and CH1 = IN+ #define CH2 0x80 // Channel 2 for single and for differential is CH2 = IN+ and CH3 = IN- #define CH3 0xC0 // Channel 3 for single and for differential is CH2 = IN- and CH3 = IN+ #define SINGLE 0x06 // Single command #define DIFFERENTIAL 0x04 // Differential command //============================================================================= // Functions Declaration //============================================================================= /** Interface to the 4-Channel 12-Bit A/D Converters with SPI interface * * Using the driver: * - remenber to setup SPI in main routine or use pins instance. * * Defaults in this driver on start up: * - Datasheet start up */ class MCP3204 { public: /** Create an instance of the MCP3204 connected via specfied SPI instance. * * @param spi The mbed SPI instance (make in main routine) * @param nCs The SPI chip select pin. */ MCP3204(SPI& spi, PinName nCs); /** Create an instance of the MCP4261 connected with SPI pins. * * @param mosi The SPI Master Output, Slave Input pin. * @param miso The SPI Master Input, Slave Output pin. * @param sck The SPI Serial Clock pin. * @param nCs The SPI chip select pin. */ MCP3204(PinName mosi, PinName miso,PinName sck, PinName nCs); /** Read from single channel. * * use defines to simplify use of function ( CH0, CH1, CH2, CH3) * @param channel The channel to receive the 12 bits value from. */ int sgl(char channel); /** Read from differential channel. * * use defines to simplify use of function ( CH0, CH1, CH2, CH3) * @param channel The channel to receive the 12 bits value from. */ int diff(char channel); private: SPI& _spi; DigitalOut _nCs; int _make_value_from_responce(int responce_msb, int responce_lsb); int _read(char sgl_or_diff, char channel); }; #endif