Merge remote-tracking branch 'upstream/master'

* upstream/master: (1239 commits)
  Update ez.c
  removes planck/rev3 temporarily
  Move hand_swap_config to ez.c, removes error for infinity
  Update Makefile
  ergodox: Update algernon's keymap to v1.9
  Added VS Code dir to .gitignore
  Support the Pegasus Hoof controller.
  [Jack & Erez] Simplifies and documents TO
  add readme
  use wait_ms instead of _delay_ms
  add messenger
  init keymap
  Add example keymap
  Adding whiskey_tango_foxtrot_capslock ergodox keymap
  Unicode map framework. Allow unicode up to 0xFFFFF using separate mapping table
  CIE 1931 dim curve
  Apply the dim curve to the RGB output
  Update the Cluecard readme files
  Tune snake and knight intervals for Cluecard
  Tunable RGB light intervals
  ...

1 files changed, 65 insertions, 0 deletions

diff --git a/tmk_core/protocol/midi/bytequeue/bytequeue.c b/tmk_core/protocol/midi/bytequeue/bytequeue.c
new file mode 100755
index 0000000000..e434956328
--- /dev/null
+++ b/tmk_core/protocol/midi/bytequeue/bytequeue.c
@@ -0,0 +1,65 @@
+//this is a single reader [maybe multiple writer?] byte queue
+//Copyright 2008 Alex Norman
+//writen by Alex Norman 
+//
+//This file is part of avr-bytequeue.
+//
+//avr-bytequeue is free software: you can redistribute it and/or modify
+//it under the terms of the GNU General Public License as published by
+//the Free Software Foundation, either version 3 of the License, or
+//(at your option) any later version.
+//
+//avr-bytequeue is distributed in the hope that it will be useful,
+//but WITHOUT ANY WARRANTY; without even the implied warranty of
+//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//GNU General Public License for more details.
+//
+//You should have received a copy of the GNU General Public License
+//along with avr-bytequeue.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "bytequeue.h"
+#include "interrupt_setting.h"
+
+void bytequeue_init(byteQueue_t * queue, uint8_t * dataArray, byteQueueIndex_t arrayLen){
+   queue->length = arrayLen;
+   queue->data = dataArray;
+   queue->start = queue->end = 0;
+}
+
+bool bytequeue_enqueue(byteQueue_t * queue, uint8_t item){
+   interrupt_setting_t setting = store_and_clear_interrupt();
+   //full
+   if(((queue->end + 1) % queue->length) == queue->start){
+      restore_interrupt_setting(setting);
+      return false;
+   } else {
+      queue->data[queue->end] = item;
+      queue->end = (queue->end + 1) % queue->length;
+      restore_interrupt_setting(setting);
+      return true;
+   }
+}
+
+byteQueueIndex_t bytequeue_length(byteQueue_t * queue){
+   byteQueueIndex_t len;
+   interrupt_setting_t setting = store_and_clear_interrupt();
+   if(queue->end >= queue->start)
+      len = queue->end - queue->start;
+   else
+      len = (queue->length - queue->start) + queue->end;
+   restore_interrupt_setting(setting);
+   return len;
+}
+
+//we don't need to avoid interrupts if there is only one reader
+uint8_t bytequeue_get(byteQueue_t * queue, byteQueueIndex_t index){
+   return queue->data[(queue->start + index) % queue->length];
+}
+
+//we just update the start index to remove elements
+void bytequeue_remove(byteQueue_t * queue, byteQueueIndex_t numToRemove){
+   interrupt_setting_t setting = store_and_clear_interrupt();
+   queue->start = (queue->start + numToRemove) % queue->length;
+   restore_interrupt_setting(setting);
+}
+