Christian Lerche / MCP4822

Library for MCP4822 SPI 12-bit DAC, both outputs supported, nLDAC connected to GND.

Dependents:   MCP4822_2aLerche

MCP4822.h@0:014a10a4fed1, 2011-01-21 (annotated)

Committer:
Lerche
Date:
Fri Jan 21 10:55:58 2011 +0000
Revision:
0:014a10a4fed1
Child:
2:eb2c8b6c0b42
First creation, works.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Lerche 0:014a10a4fed1 1 /* MCP4822 library
Lerche 0:014a10a4fed1 2 * Copyright (c) 2008-2010, Lerche
Lerche 0:014a10a4fed1 3 *
Lerche 0:014a10a4fed1 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
Lerche 0:014a10a4fed1 5 * of this software and associated documentation files (the "Software"), to deal
Lerche 0:014a10a4fed1 6 * in the Software without restriction, including without limitation the rights
Lerche 0:014a10a4fed1 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
Lerche 0:014a10a4fed1 8 * copies of the Software, and to permit persons to whom the Software is
Lerche 0:014a10a4fed1 9 * furnished to do so, subject to the following conditions:
Lerche 0:014a10a4fed1 10 *
Lerche 0:014a10a4fed1 11 * The above copyright notice and this permission notice shall be included in
Lerche 0:014a10a4fed1 12 * all copies or substantial portions of the Software.
Lerche 0:014a10a4fed1 13 *
Lerche 0:014a10a4fed1 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
Lerche 0:014a10a4fed1 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
Lerche 0:014a10a4fed1 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
Lerche 0:014a10a4fed1 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
Lerche 0:014a10a4fed1 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Lerche 0:014a10a4fed1 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
Lerche 0:014a10a4fed1 20 * THE SOFTWARE.
Lerche 0:014a10a4fed1 21 */
Lerche 0:014a10a4fed1 22
Lerche 0:014a10a4fed1 23 #include "mbed.h"
Lerche 0:014a10a4fed1 24
Lerche 0:014a10a4fed1 25 #ifndef MCP4822_H
Lerche 0:014a10a4fed1 26 #define MCP4822_H
Lerche 0:014a10a4fed1 27
Lerche 0:014a10a4fed1 28 /* Class: MCP4822
Lerche 0:014a10a4fed1 29 * Abstraction for a SPI DAC
Lerche 0:014a10a4fed1 30 */
Lerche 0:014a10a4fed1 31
Lerche 0:014a10a4fed1 32 namespace mbed {
Lerche 0:014a10a4fed1 33 class MCP4822 {
Lerche 0:014a10a4fed1 34
Lerche 0:014a10a4fed1 35 public:
Lerche 0:014a10a4fed1 36 /* Constructor: MCP4822
Lerche 0:014a10a4fed1 37 * Create an instance of the MCP4822 connected to specfied SPI pins.
Lerche 0:014a10a4fed1 38 *
Lerche 0:014a10a4fed1 39 * Variables:
Lerche 0:014a10a4fed1 40 * SCK - The SPI clock pin
Lerche 0:014a10a4fed1 41 * SDO - The SPI Data out pin
Lerche 0:014a10a4fed1 42 * /CS - The ChipSelect pin
Lerche 0:014a10a4fed1 43 */
Lerche 0:014a10a4fed1 44 MCP4822 (PinName mosi, PinName sclk, PinName ncs);
Lerche 0:014a10a4fed1 45 /* Function: write to A-output
Lerche 0:014a10a4fed1 46 * Write to the A-output, max 4095 (0xFFF) with 1 mV steps
Lerche 0:014a10a4fed1 47 *
Lerche 0:014a10a4fed1 48 * Variables:
Lerche 0:014a10a4fed1 49 * ValueA
Lerche 0:014a10a4fed1 50 */
Lerche 0:014a10a4fed1 51 void writeA (int ValueA);
Lerche 0:014a10a4fed1 52 /* Function: write to B-output
Lerche 0:014a10a4fed1 53 * Write to the B-output, max 4095 (0xFFF) with 1 mV steps
Lerche 0:014a10a4fed1 54 *
Lerche 0:014a10a4fed1 55 * Variables:
Lerche 0:014a10a4fed1 56 * ValueB
Lerche 0:014a10a4fed1 57 */
Lerche 0:014a10a4fed1 58 void writeB (int ValueB);
Lerche 0:014a10a4fed1 59
Lerche 0:014a10a4fed1 60 private :
Lerche 0:014a10a4fed1 61 SPI _spi;
Lerche 0:014a10a4fed1 62 DigitalOut _ncs;
Lerche 0:014a10a4fed1 63 void _init();
Lerche 0:014a10a4fed1 64 };
Lerche 0:014a10a4fed1 65 }
Lerche 0:014a10a4fed1 66 #endif