Library for MCP4822 SPI 12-bit DAC, both outputs supported, nLDAC connected to GND.
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?
User | Revision | Line number | New 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 |