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authorDavid A. Mellis <d.mellis@arduino.cc>2012-09-13 10:41:16 -0400
committerDavid A. Mellis <d.mellis@arduino.cc>2012-09-13 10:41:16 -0400
commit0d9a111face4f3629bcae8e52af843792af3b453 (patch)
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+/* This header file is part of the ATMEL AVR-UC3-SoftwareFramework-1.7.0 Release */
+
+/*This file is prepared for Doxygen automatic documentation generation.*/
+/*! \file *********************************************************************
+ *
+ * \brief RTC driver for AVR32 UC3.
+ *
+ * AVR32 Real Time Counter driver module.
+ *
+ * - Compiler: GNU GCC for AVR32
+ * - Supported devices: All AVR32 devices with an RTC and a PM module can be used.
+ * - AppNote:
+ *
+ * \author Atmel Corporation: http://www.atmel.com \n
+ * Support and FAQ: http://support.atmel.no/
+ *
+ ******************************************************************************/
+
+/* Copyright (c) 2009 Atmel Corporation. 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 Atmel may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * 4. This software may only be redistributed and used in connection with an Atmel
+ * AVR product.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT 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 _RTC_H_
+#define _RTC_H_
+
+#include "compiler.h"
+#include <avr32/io.h>
+
+
+/*! \name Oscillator Types
+ */
+//! @{
+#define RTC_OSC_32KHZ 1
+#define RTC_OSC_RC 0
+//! @}
+
+/*! \name Predefined PSEL Values
+ */
+//! @{
+
+//! The PSEL value to set the RTC source clock (after the prescaler) to 1 Hz,
+//! when using an external 32-kHz crystal.
+#define RTC_PSEL_32KHZ_1HZ 14
+
+//! The PSEL value to set the RTC source clock (after the prescaler) to 1.76 Hz,
+//! when using the internal RC oscillator (~ 115 kHz).
+#define RTC_PSEL_RC_1_76HZ 15
+
+//! @}
+
+
+/*!
+ * \brief This function will initialise the RTC module.
+ * If you use the 32 KHz oscillator, it will enable this module.
+ * This function also set the top value of the RTC to 0xFFFFFFFF
+ * and the value to 0.
+ * \param rtc Base address of the RTC (i.e. &AVR32_RTC).
+ * \param osc_type The oscillator you want to use. If you need a better
+ * accuracy, use the 32 KHz oscillator (i.e. RTC_OSC_32KHZ).
+ * \param psel The preselector value for the corresponding oscillator (4-bits).
+ * To obtain this value, you can use this formula:
+ * psel = log(Fosc/Frtc)/log(2)-1, where Fosc is the frequency of the
+ * oscillator you are using (32 KHz or 115 KHz) and Frtc the frequency
+ * desired.
+ * \return 1 if the initialisation succeds otherwize it will return 0.
+ */
+extern int rtc_init(volatile avr32_rtc_t *rtc, unsigned char osc_type, unsigned char psel);
+
+/*!
+ * \brief Enable the RTC.
+ * \param rtc Base address of the RTC (i.e. &AVR32_RTC).
+ */
+extern void rtc_enable(volatile avr32_rtc_t *rtc);
+
+/*!
+ * \brief Disable the RTC.
+ * \param rtc Base address of the RTC (i.e. &AVR32_RTC).
+ */
+extern void rtc_disable(volatile avr32_rtc_t *rtc);
+
+/*!
+ * \brief Enable the wake up feature of the RTC.
+ * \param rtc Base address of the RTC (i.e. &AVR32_RTC).
+ */
+extern void rtc_enable_wake_up(volatile avr32_rtc_t *rtc);
+
+/*!
+ * \brief Disable the wake up feature of the RTC.
+ * \param rtc Base address of the RTC (i.e. &AVR32_RTC).
+ */
+extern void rtc_disable_wake_up(volatile avr32_rtc_t *rtc);
+
+/*!
+ * \brief Enable the interrupt feature of the RTC.
+ * An interrupt is raised when the value of the RTC
+ * is equal to its top value.
+ * \param rtc Base address of the RTC (i.e. &AVR32_RTC).
+ */
+extern void rtc_enable_interrupt(volatile avr32_rtc_t *rtc);
+
+/*!
+ * \brief Disable the interrupt feature of the RTC.
+ * \param rtc Base address of the RTC (i.e. &AVR32_RTC).
+ */
+extern void rtc_disable_interrupt(volatile avr32_rtc_t *rtc);
+
+/*!
+ * \brief Clear the interrupt flag.
+ * Call this function once you handled the interrupt.
+ * \param rtc Base address of the RTC (i.e. &AVR32_RTC).
+ */
+extern void rtc_clear_interrupt(volatile avr32_rtc_t *rtc);
+
+/*!
+ * \brief Get the status of interrupts.
+ * \param rtc Base address of the RTC (i.e. &AVR32_RTC).
+ * \return 1 if the interrupts are enabled otherwize it returns 0.
+ */
+extern int rtc_interrupt_enabled(volatile avr32_rtc_t *rtc);
+
+/*!
+ * \brief Check if an interrupt is raised.
+ * \param rtc Base address of the RTC (i.e. &AVR32_RTC).
+ * \return 1 if an interrupt is currently raised otherwize it returns 0.
+ */
+extern int rtc_is_interrupt(volatile avr32_rtc_t *rtc);
+
+/*!
+ * \brief This function sets the RTC current top value.
+ * \param rtc Base address of the RTC (i.e. &AVR32_RTC).
+ * \param top The top value you want to store.
+ */
+extern void rtc_set_top_value(volatile avr32_rtc_t *rtc, unsigned long top);
+
+/*!
+ * \brief This function returns the RTC current top value.
+ * \param rtc Base address of the RTC (i.e. &AVR32_RTC).
+ * \return The RTC current top value.
+ */
+extern unsigned long rtc_get_top_value(volatile avr32_rtc_t *rtc);
+
+/*!
+ * \brief This function checks if the RTC is busy or not.
+ * \param rtc Base address of the RTC (i.e. &AVR32_RTC).
+ * \return 1 if the RTC is busy otherwize it will return 0.
+ */
+extern int rtc_is_busy(volatile avr32_rtc_t *rtc);
+
+/*!
+ * \brief This function sets the RTC current value.
+ * \param rtc Base address of the RTC (i.e. &AVR32_RTC).
+ * \param val The value you want to store.
+ */
+extern void rtc_set_value(volatile avr32_rtc_t *rtc, unsigned long val);
+
+/*!
+ * \brief This function returns the RTC current value.
+ * \param rtc Base address of the RTC (i.e. &AVR32_RTC).
+ * \return The RTC current value.
+ */
+extern unsigned long rtc_get_value(volatile avr32_rtc_t *rtc);
+
+
+#endif // _RTC_H_