Aurelian FEJER / MCP4812

MCP4812 library modifying MCP4822 library * Copyright (c) 2008-2010, Lerche

MCP4812.h@0:a68207b74d7d, 2012-06-02 (annotated)

Committer:
afejer
Date:
Sat Jun 02 13:51:53 2012 +0000
Revision:
0:a68207b74d7d
Revision 1.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
afejer 0:a68207b74d7d 1 /* MCP4812 library
afejer 0:a68207b74d7d 2 * MCP4822 library
afejer 0:a68207b74d7d 3 * Copyright (c) 2008-2010, Lerche
afejer 0:a68207b74d7d 4 *
afejer 0:a68207b74d7d 5 * Permission is hereby granted, free of charge, to any person obtaining a copy
afejer 0:a68207b74d7d 6 * of this software and associated documentation files (the "Software"), to deal
afejer 0:a68207b74d7d 7 * in the Software without restriction, including without limitation the rights
afejer 0:a68207b74d7d 8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
afejer 0:a68207b74d7d 9 * copies of the Software, and to permit persons to whom the Software is
afejer 0:a68207b74d7d 10 * furnished to do so, subject to the following conditions:
afejer 0:a68207b74d7d 11 *
afejer 0:a68207b74d7d 12 * The above copyright notice and this permission notice shall be included in
afejer 0:a68207b74d7d 13 * all copies or substantial portions of the Software.
afejer 0:a68207b74d7d 14 *
afejer 0:a68207b74d7d 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
afejer 0:a68207b74d7d 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
afejer 0:a68207b74d7d 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
afejer 0:a68207b74d7d 18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
afejer 0:a68207b74d7d 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
afejer 0:a68207b74d7d 20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
afejer 0:a68207b74d7d 21 * THE SOFTWARE.
afejer 0:a68207b74d7d 22 * modified on 27.05.2012 for MCP4812 dual SPI DAC with 10 bits resolution
afejer 0:a68207b74d7d 23 */
afejer 0:a68207b74d7d 24
afejer 0:a68207b74d7d 25 #include "mbed.h"
afejer 0:a68207b74d7d 26
afejer 0:a68207b74d7d 27 #ifndef MCP4812_H
afejer 0:a68207b74d7d 28 #define MCP4812_H
afejer 0:a68207b74d7d 29
afejer 0:a68207b74d7d 30 /** Interface to a 10-bit SPI dual-output DAC */
afejer 0:a68207b74d7d 31 class MCP4812 {
afejer 0:a68207b74d7d 32 public:
afejer 0:a68207b74d7d 33 /** Constructor: MCP4812
afejer 0:a68207b74d7d 34 *
afejer 0:a68207b74d7d 35 * @param MOSI - The SPI Data out pin
afejer 0:a68207b74d7d 36 * @param SCLK - The SPI clock pin
afejer 0:a68207b74d7d 37 * @param /CS - The ChipSelect pin
afejer 0:a68207b74d7d 38 */
afejer 0:a68207b74d7d 39 MCP4812 (PinName mosi, PinName sclk, PinName ncs);
afejer 0:a68207b74d7d 40 /** Write to the A-output, max 1023 (0x3FF) with 2/4 mV steps
afejer 0:a68207b74d7d 41 *
afejer 0:a68207b74d7d 42 * @param ValueA The value to be written
afejer 0:a68207b74d7d 43 */
afejer 0:a68207b74d7d 44 void writeA (int ValueA, int gainA);
afejer 0:a68207b74d7d 45 /** Write to the B-output, max 1023 (0x3FF) with 2/4 mV steps
afejer 0:a68207b74d7d 46 *
afejer 0:a68207b74d7d 47 * @param ValueB The valkue to be written
afejer 0:a68207b74d7d 48 */
afejer 0:a68207b74d7d 49 void writeB (int ValueB, int gainB);
afejer 0:a68207b74d7d 50 /** Write to any output, accoding to letter.
afejer 0:a68207b74d7d 51 *
afejer 0:a68207b74d7d 52 *
afejer 0:a68207b74d7d 53 */
afejer 0:a68207b74d7d 54 void write(char chan, int value, int gain);
afejer 0:a68207b74d7d 55 /** Shutdown the output on specific channel
afejer 0:a68207b74d7d 56 *
afejer 0:a68207b74d7d 57 *
afejer 0:a68207b74d7d 58 */
afejer 0:a68207b74d7d 59 void shdn();
afejer 0:a68207b74d7d 60
afejer 0:a68207b74d7d 61 private :
afejer 0:a68207b74d7d 62 SPI _spi;
afejer 0:a68207b74d7d 63 DigitalOut _ncs;
afejer 0:a68207b74d7d 64 void _init();
afejer 0:a68207b74d7d 65 };
afejer 0:a68207b74d7d 66
afejer 0:a68207b74d7d 67 #endif