Renishaw
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.
Diff: main.cpp
- Revision:
- 1:83e238178956
- Parent:
- 0:c71cc517659b
--- 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