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/****************************************************************************************
* arch/arm/src/sam3u/sam3u_rtt.h
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS 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 __ARCH_ARM_SRC_SAM3U_SAM3U_RTT_H
#define __ARCH_ARM_SRC_SAM3U_SAM3U_RTT_H
/****************************************************************************************
* Included Files
****************************************************************************************/
#include <nuttx/config.h>
#include "chip.h"
#include "sam3u_memorymap.h"
/****************************************************************************************
* Pre-processor Definitions
****************************************************************************************/
/* RTT register offsets *****************************************************************/
#define SAM3U_RTT_MR_OFFSET 0x00 /* Mode Register */
#define SAM3U_RTT_AR_OFFSET 0x04 /* Alarm Register */
#define SAM3U_RTT_VR_OFFSET 0x08 /* Value Register */
#define SAM3U_RTT_SR_OFFSET 0x0c /* Status Register */
/* RTT register adresses ***************************************************************/
#define SAM3U_RTT_MR (SAM3U_RTT_BASE+SAM3U_RTT_MR_OFFSET)
#define SAM3U_RTT_AR (SAM3U_RTT_BASE+SAM3U_RTT_AR_OFFSET)
#define SAM3U_RTT_VR (SAM3U_RTT_BASE+SAM3U_RTT_VR_OFFSET)
#define SAM3U_RTT_SR (SAM3U_RTT_BASE+SAM3U_RTT_SR_OFFSET)
/* RTT register bit definitions ********************************************************/
#define RTT_MR_RTPRES_SHIFT (0) /* Bits 0-15: Real-time Timer Prescaler Value */
#define RTT_MR_RTPRES__MASK (0xffff << RTT_MR_RTPRES_SHIFT)
#define RTT_MR_ALMIEN (1 << 16) /* Bit 16: Alarm Interrupt Enable */
#define RTT_MR_RTTINCIEN (1 << 17) /* Bit 17: Real-time Timer Increment Int Enable */
#define RTT_MR_RTTRST (1 << 18) /* Bit 18: Real-time Timer Restart */
#define RTT_SR_ALMS (1 << 0) /* Bit 0: Real-time Alarm Status */
#define RTT_SR_RTTINC (1 << 1) /* Bit 1: Real-time Timer Increment */
/****************************************************************************************
* Public Types
****************************************************************************************/
/****************************************************************************************
* Public Data
****************************************************************************************/
/****************************************************************************************
* Public Functions
****************************************************************************************/
#endif /* __ARCH_ARM_SRC_SAM3U_SAM3U_RTT_H */
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