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Interface the RenBed with a simple optical linear encoder, using X1 encoding.
Dependencies: SevenSegmentDisplay mbed
This is an example of a copper strip-board design for an optical linear encoder (IRED), and how it is wired up to the Renbed on a breadboard:
The trimmer potentiometer is used to vary the current through the IRED LEDs, in order to balance out the two output signals.
Revision 1:83e238178956, committed 2016-09-08
- Comitter:
- elijahorr
- Date:
- Thu Sep 08 07:15:57 2016 +0000
- Parent:
- 0:c71cc517659b
- Commit message:
- first issue
Changed in this revision
main.cpp | Show annotated file Show diff for this revision Revisions of this file |
diff -r c71cc517659b -r 83e238178956 main.cpp --- a/main.cpp Mon Sep 05 13:17:15 2016 +0000 +++ b/main.cpp Thu Sep 08 07:15:57 2016 +0000 @@ -1,11 +1,41 @@ +/******************************************************************************* +* Program to interface RenBed to a simple optical linear encoder * +* Copyright (c) 2016 Elijah Orr * +* * +* 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. * +* * +* Encoder * +* * +* V1.0 08/09/2016 First issue of code Elijah Orr * +*******************************************************************************/ + #include "mbed.h" #include "SevenSegmentDisplay.h" -// define values for high and low analog signals, used to compare to ADC values. 0.56 indicates that the low level is set to 56% of 3.3V. +/* define values for high and low analog signals, used to compare to ADC values. 0.56 indicates that the low level is set to 56% of 3.3V. +* you will likely need to change these values for your particular encoder */ #define SIGNAL_LOW 0.56 #define SIGNAL_HIGH 0.60 class Encoder{ + +//public functions and variables can be accessed from anywhere public: /**************************************************************************************************************** @@ -38,7 +68,8 @@ int get_count(void){ return count; } - + +//private functions and variables are only accessable from within the encoder class private: AnalogIn SignalA; //analog input for signal A AnalogIn SignalB; //analog input for signal B