Eduardo de Mier / UIEncoder

Library for manual Encoders as used in user interfaces. Very simple, reduced and rock solid encoder library. Counts full pulses only. Inherent debouncing through state machine. Running on a regular timer IRQ. No IRQ jamming through bouncing. Immune to false edges giving unwanted counts when moving partial steps. Not depending on PinDetect or anything else. May be enhanced by adding acceleration and push button debouncing in the future.

Library for manual Encoders as used in user interfaces. Very simple, reduced and rock solid. Counts full pulses/steps only. Inherent debouncing through state machine. No time dependency for debouncing. Very tight code running in a regular timer IRQ. No IRQ jamming through bouncing edges. Immune to false edges giving unwanted counts when moving partial steps back and forth. Not depending on PinDetect or any other debouncing library. May be enhanced in the near future by adding acceleration and push button debouncing.

Files at this revision

API Documentation at this revision

Revision 8:3086ea6466d1, committed 2015-05-20

Comitter:
eduardoG26
Date:
Wed May 20 18:16:22 2015 +0000
Parent:
7:c7daa056b152
Commit message:
Changes for easy ebugging

Changed in this revision

Encoder.cpp Show annotated file Show diff for this revision Revisions of this file
EncoderConfig.h Show annotated file Show diff for this revision Revisions of this file 
--- a/Encoder.cpp	Thu Mar 26 14:21:57 2015 +0000
+++ b/Encoder.cpp	Wed May 20 18:16:22 2015 +0000
@@ -107,6 +107,11 @@
 // State machine. Runs in IRQ. Static.
 static void EncoderTickIRQ()
 {
+#if DEBUG_ENC
+    DebugPin = 0;
+    DebugPin = 1;
+    DebugPin = 0;
+#endif
     // Encoder section
     // If-then-else structure is good because every pin is read max. once.
     if(PinB) {

--- a/EncoderConfig.h	Thu Mar 26 14:21:57 2015 +0000
+++ b/EncoderConfig.h	Wed May 20 18:16:22 2015 +0000
@@ -39,7 +39,7 @@
 // 250µs is a good value for cheap 24 ppr encoders (ALPS EC12E24...) with strong bouncing.
 // 1000µs is a good value for quality 24 ppr encoders (ALPS EC12E24...) with low bouncing.
 // 250µs is a good value for fast 24+ ppr encoders (Sparkfun, Some Bourns types, ...).
-#define ENCODER_SAMPLE_PERIOD_US (125)
+#define ENCODER_SAMPLE_PERIOD_US (250)
 
 // Pushbutton debouncing in milliseconds
 #define ENCODER_PB_DEBOUNCE_MS (125uL)