From 6c71b19c77d27e04ee0a2964f9630473ccc97536 Mon Sep 17 00:00:00 2001
From: Kai Ryu <kai1103@gmail.com>
Date: Sat, 11 Jan 2014 22:24:32 +0900
Subject: [PATCH] Add files for led matrix

---
 common/led_matrix.c | 20 ++++++++++++++++++++
 common/led_matrix.h | 41 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+)
 create mode 100644 common/led_matrix.c
 create mode 100644 common/led_matrix.h

diff --git a/common/led_matrix.c b/common/led_matrix.c
new file mode 100644
index 00000000..2a1e83d2
--- /dev/null
+++ b/common/led_matrix.c
@@ -0,0 +1,20 @@
+/*
+Copyright 2013,2014 Kai Ryu <kai1103@gmail.com>
+
+This program 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 2 of the License, or
+(at your option) any later version.
+
+This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include "led_matrix.h"
diff --git a/common/led_matrix.h b/common/led_matrix.h
new file mode 100644
index 00000000..f683ff09
--- /dev/null
+++ b/common/led_matrix.h
@@ -0,0 +1,41 @@
+/*
+Copyright 2013,2014 Kai Ryu <kai1103@gmail.com>
+
+This program 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 2 of the License, or
+(at your option) any later version.
+
+This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef LED_MATRIX_H
+#define LED_MATRIX_H
+
+#include <stdint.h>
+#include <stdbool.h>
+
+typedef struct {
+    union {
+        int8_t delta;
+        struct {
+            bool direction:1;
+        }
+    }
+    uint8_t value;
+} led_matrix_element_t;
+
+uint8_t led_matrix_rows(void);
+uint8_t led_matrix_cols(void);
+void led_matrix_init(void);
+void led_matrix_enable(void);
+void led_matrix_disable(void);
+uint8_t led_matrix_scan(void);
+
+#endif