From 55b163aa78bc1056763eab1507a7cb5d1d7cb8bb Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Thu, 7 Feb 2013 03:04:02 +0000
Subject: added ajar module

git-svn-id: https://svn.spreadspace.org/avr/trunk@170 aa12f405-d877-488e-9caf-2d797e2a1cc7
---
 usb-i2c-sl018/Makefile    |  2 +-
 usb-i2c-sl018/ajar.c      | 76 +++++++++++++++++++++++++++++++++++++++++++++++
 usb-i2c-sl018/ajar.h      | 34 +++++++++++++++++++++
 usb-i2c-sl018/tuer-rfid.c |  3 ++
 4 files changed, 114 insertions(+), 1 deletion(-)
 create mode 100644 usb-i2c-sl018/ajar.c
 create mode 100644 usb-i2c-sl018/ajar.h

diff --git a/usb-i2c-sl018/Makefile b/usb-i2c-sl018/Makefile
index 6619f41..697806b 100644
--- a/usb-i2c-sl018/Makefile
+++ b/usb-i2c-sl018/Makefile
@@ -23,7 +23,7 @@
 
 NAME := tuer-rfid
 BOARD_TYPE := teensy2
-OBJ := $(NAME).o heartbeat.o stepper.o ledmatrix.o sl018.o keystore.o statemachine.o eventqueue.o limits.o manual.o
+OBJ := $(NAME).o heartbeat.o stepper.o ledmatrix.o sl018.o keystore.o statemachine.o eventqueue.o limits.o manual.o ajar.o
 LIBS := util led lufa-descriptor-usbserial anyio
 EXTERNAL_LIBS := lufa
 
diff --git a/usb-i2c-sl018/ajar.c b/usb-i2c-sl018/ajar.c
new file mode 100644
index 0000000..54bd6fb
--- /dev/null
+++ b/usb-i2c-sl018/ajar.c
@@ -0,0 +1,76 @@
+/*
+ *  spreadspace avr utils
+ *
+ *
+ *  Copyright (C) 2013 Christian Pointner <equinox@spreadspace.org>
+ *                     Othmar Gsenger <otti@wirdorange.org>
+ *
+ *  This file is part of spreadspace avr utils.
+ *
+ *  spreadspace avr utils 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
+ *  any later version.
+ *
+ *  spreadspace avr utils 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 spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <avr/io.h>
+#include <stdio.h>
+#include "ajar.h"
+
+#define AJAR_PIN PIND
+#define AJAR_PORT PORTD
+#define AJAR_DDR DDRD
+#define AJAR_BIT 4
+
+#define AJAR_LP_MAX 255
+
+void init_ajar(void)
+{
+  AJAR_DDR = AJAR_DDR & ~(1<<AJAR_BIT);
+  AJAR_PORT |= (1<<AJAR_BIT);
+}
+
+ajar_t ajar_get(void)
+{
+  static uint8_t last_state = (1<<AJAR_BIT);
+  static uint8_t lp_cnt = 0;
+
+  uint8_t state = AJAR_PIN & (1<<AJAR_BIT);
+  if(state != last_state)
+    lp_cnt++;
+  else
+    lp_cnt += lp_cnt ? -1 : 0;
+
+  if(lp_cnt >= AJAR_LP_MAX) {
+    last_state = state;
+    lp_cnt = 0;
+  }
+  
+  if(last_state) 
+    return ajar;
+  return shut;
+}
+
+const char* ajar_to_string(ajar_t a)
+{
+  return a == ajar ? "ajar" : "shut";
+}
+
+void ajar_task(void)
+{
+  static ajar_t last_state = shut;
+
+  ajar_t state = ajar_get();
+  if(last_state != state)
+    printf("Door is now: %s\n\r", ajar_to_string(state));
+  
+  last_state = state;
+}
diff --git a/usb-i2c-sl018/ajar.h b/usb-i2c-sl018/ajar.h
new file mode 100644
index 0000000..44f0f82
--- /dev/null
+++ b/usb-i2c-sl018/ajar.h
@@ -0,0 +1,34 @@
+/*
+ *  spreadspace avr utils
+ *
+ *
+ *  Copyright (C) 2013 Christian Pointner <equinox@spreadspace.org>
+ *                     Othmar Gsenger <otti@wirdorange.org>
+ *
+ *  This file is part of spreadspace avr utils.
+ *
+ *  spreadspace avr utils 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
+ *  any later version.
+ *
+ *  spreadspace avr utils 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 spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef R3TUER_ajar_h_INCLUDED
+#define R3TUER_ajar_h_INCLUDED
+
+typedef enum { ajar, shut } ajar_t;
+
+void init_ajar(void);
+ajar_t ajar_get(void);
+const char* ajar_to_string(ajar_t a);
+void ajar_task(void);
+
+#endif
diff --git a/usb-i2c-sl018/tuer-rfid.c b/usb-i2c-sl018/tuer-rfid.c
index 8973994..3e54a5d 100644
--- a/usb-i2c-sl018/tuer-rfid.c
+++ b/usb-i2c-sl018/tuer-rfid.c
@@ -43,6 +43,7 @@
 #include "eventqueue.h"
 #include "limits.h"
 #include "manual.h"
+#include "ajar.h"
 
 void handle_stdio(uint8_t cmd)
 {  
@@ -119,6 +120,7 @@ int main(void)
   init_eventqueue();
   init_limits();
   init_manual();
+  init_ajar();
   sei();  
 
   sl018_reset();
@@ -128,6 +130,7 @@ int main(void)
 
     anyio_task();
     manual_task();
+    ajar_task();
 
     int16_t bytes_received = anyio_bytes_received();
     if(bytes_received > 0)
-- 
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