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diff --git a/firmwares/wifishield/wifiHD/src/timer.h b/firmwares/wifishield/wifiHD/src/timer.h
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+++ b/firmwares/wifishield/wifiHD/src/timer.h
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+/*! \page License
+ * Copyright (C) 2009, H&D Wireless AB All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * 3. The name of H&D Wireless AB may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY H&D WIRELESS AB ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY AND
+ * SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef TIMER_H
+#define TIMER_H
+#include <stdint.h>
+
+enum {
+        TIMEOUT_ONESHOT,
+        TIMEOUT_PERIODIC
+};
+
+#define INVALID_TIMER_ID 0xFFFFFFFF
+
+/* Handle timer overflows. Return 1 if the interval has passed. */
+int timer_interval_passed(uint32_t old, uint32_t new, uint32_t diff);
+
+void timer_tick();
+void timer_init(void (*tick_isr) (void* ctx), void* ctx);
+void timer_poll(void);
+void timer_delay(uint32_t ms);
+uint32_t timer_sched_timeout_cb(uint32_t ms, uint8_t type, void (*cb)(void *ctx), void* ctx);
+uint32_t timer_mod(uint32_t id, uint32_t ms, uint8_t type, void (*cb)(void *ctx), void* ctx);
+void timer_cancel_timeout(uint32_t id);
+uint32_t timer_get_ms(void);
+
+#endif