85 lines
3.9 KiB
C
85 lines
3.9 KiB
C
/********************************************************************************************
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* arch/arm/src/samd/chip/sam_sercom.h
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*
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* Copyright (C) 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* References:
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* "Atmel SAM D20J / SAM D20G / SAM D20E ARM-Based Microcontroller
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* Datasheet", 42129J–SAM–12/2013
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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_SAMD_CHIP_SAM_SERCOM_H
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#define __ARCH_ARM_SRC_SAMD_CHIP_SAM_SERCOM_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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/********************************************************************************************
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* Pre-processor Definitions
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********************************************************************************************/
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/* Two generic clocks are used by the SERCOM: GCLK_SERCOMx_CORE and GCLK_SERCOMx_SLOW. The
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* core clock (GCLK_SERCOMx_CORE) is required to clock the SERCOM while operating as a
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* master, while the slow clock (GCLK_SERCOMx_SLOW) is only required for certain functions.
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* SERCOM modules must share the same slow GCLK channel ID.
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*
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* The baud-rate generator runs off the GCLK_SERCOMx_CORE clock (or, optionally, external
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* clock).
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*/
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#define SERCOM_GCLK_ID_SLOW 12
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#define SERCOM_GCLK_ID_CORE(n) (13+(n))
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# define SERCOM0_GCLK_ID_CORE 13
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# define SERCOM1_GCLK_ID_CORE 14
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# define SERCOM2_GCLK_ID_CORE 15
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# define SERCOM3_GCLK_ID_CORE 16
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# define SERCOM4_GCLK_ID_CORE 17
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# define SERCOM5_GCLK_ID_CORE 18
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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_SAMD_CHIP_SAM_SERCOM_H */
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