104 lines
4.9 KiB
C
104 lines
4.9 KiB
C
/****************************************************************************************
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* arch/arm/src/sam34/chip/sam_rtt.h
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* Real-time Timer (RTT) definitions for the SAM3U, SAM4E, and SAM4S
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*
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* Copyright (C) 2009, 2013-2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************************/
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#ifndef __ARCH_ARM_SRC_SAM34_CHIP_SAM_RTT_H
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#define __ARCH_ARM_SRC_SAM34_CHIP_SAM_RTT_H
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/****************************************************************************************
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* Included Files
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****************************************************************************************/
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#include <nuttx/config.h>
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#include "chip.h"
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#include "chip/sam_memorymap.h"
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/****************************************************************************************
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* Pre-processor Definitions
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****************************************************************************************/
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/* RTT register offsets *****************************************************************/
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#define SAM_RTT_MR_OFFSET 0x00 /* Mode Register */
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#define SAM_RTT_AR_OFFSET 0x04 /* Alarm Register */
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#define SAM_RTT_VR_OFFSET 0x08 /* Value Register */
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#define SAM_RTT_SR_OFFSET 0x0c /* Status Register */
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/* RTT register addresses ***************************************************************/
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#define SAM_RTT_MR (SAM_RTT_BASE+SAM_RTT_MR_OFFSET)
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#define SAM_RTT_AR (SAM_RTT_BASE+SAM_RTT_AR_OFFSET)
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#define SAM_RTT_VR (SAM_RTT_BASE+SAM_RTT_VR_OFFSET)
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#define SAM_RTT_SR (SAM_RTT_BASE+SAM_RTT_SR_OFFSET)
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/* RTT register bit definitions ********************************************************/
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/* Real-time Timer Mode Register */
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#define RTT_MR_RTPRES_SHIFT (0) /* Bits 0-15: Real-time Timer Prescaler Value */
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#define RTT_MR_RTPRES_MASK (0xffff << RTT_MR_RTPRES_SHIFT)
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# define RTT_MR_RTPRES(n) ((uint32_t)(n) << RTT_MR_RTPRES_SHIFT)
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#define RTT_MR_ALMIEN (1 << 16) /* Bit 16: Alarm Interrupt Enable */
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#define RTT_MR_RTTINCIEN (1 << 17) /* Bit 17: Real-time Timer Increment Int Enable */
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#define RTT_MR_RTTRST (1 << 18) /* Bit 18: Real-time Timer Restart */
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#if defined(CONFIG_ARCH_CHIP_SAM4S) || defined(CONFIG_ARCH_CHIP_SAM4E)
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# define RTT_MR_RTTDIS (1 << 20) /* Bit 20: Real-time Timer Disable */
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# define RTT_MR_RTC1HZ (1 << 24) /* Bit 24: Real-Time Clock 1Hz Clock Selection */
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#endif
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/* Real-time Timer Alarm Register (32-bit alarm value) */
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/* Real-time Timer Value Register (32-bit timer value) */
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/* Real-time Timer Status Register */
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#define RTT_SR_ALMS (1 << 0) /* Bit 0: Real-time Alarm Status */
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#define RTT_SR_RTTINC (1 << 1) /* Bit 1: Real-time Timer Increment */
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/****************************************************************************************
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* Public Types
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****************************************************************************************/
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/****************************************************************************************
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* Public Data
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****************************************************************************************/
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/****************************************************************************************
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* Public Functions
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****************************************************************************************/
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#endif /* __ARCH_ARM_SRC_SAM34_CHIP_SAM_RTT_H */
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