145 lines
4.8 KiB
C
145 lines
4.8 KiB
C
/****************************************************************************
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* arch/arm/src/samd2l2/sam_sercom.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_SAMD2L2_SAM_SERCOM_H
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#define __ARCH_ARM_SRC_SAMD2L2_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 <stdbool.h>
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#include "arm_internal.h"
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#include "sam_config.h"
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#include "sam_periphclks.h"
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#if defined(CONFIG_ARCH_FAMILY_SAMD20) || defined(CONFIG_ARCH_FAMILY_SAMD21)
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# include "hardware/samd_sercom.h"
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#elif defined(CONFIG_ARCH_FAMILY_SAML21)
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# include "hardware/saml_sercom.h"
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#else
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# error Unrecognized SAMD/L architecture
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#endif
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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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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#ifndef __ASSEMBLY__
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: sercom_enable
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*
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* Description:
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* Enable clocking to a SERCOM module
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*
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* Assumptions/Limitation:
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* This operation is global and atomic. Interrupts will be masked.
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*
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****************************************************************************/
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static inline void sercom_enable(int sercom)
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{
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#ifdef SAMD2L2_HAVE_SERCOM5
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/* SERCOM5 is a special case */
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if (sercom == 5)
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{
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sam_sercom5_enableperiph();
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}
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else
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#endif
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{
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sam_sercom_enableperiph(sercom);
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}
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}
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: sercom_coreclk_configure
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*
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* Description:
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* Configure the SERCOM core source clock.
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*
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* Two generic clocks are used by the SERCOM: GCLK_SERCOMx_CORE and
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* GCLK_SERCOMx_SLOW. The core clock (GCLK_SERCOMx_CORE) is required to
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* clock the SERCOM while operating as a master, while the slow clock
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* (GCLK_SERCOM_SLOW) is only required for certain functions. SERCOM
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* 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,
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* optionally, external clock).
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*
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****************************************************************************/
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#if defined(CONFIG_ARCH_FAMILY_SAMD20) || defined(CONFIG_ARCH_FAMILY_SAMD21)
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void sercom_coreclk_configure(int sercom, int gclkgen, bool wrlock);
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#endif
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/****************************************************************************
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* Name: sercom_slowclk_configure
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*
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* Description:
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* Configure the SERCOM slow source clock.
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*
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* Two generic clocks are used by the SERCOM: GCLK_SERCOMx_CORE and
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* GCLK_SERCOMx_SLOW. The core clock (GCLK_SERCOMx_CORE) is required to
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* clock the SERCOM while operating as a master, while the slow clock
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* (GCLK_SERCOM_SLOW) is only required for certain functions. SERCOM
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* modules must share the same slow GCLK channel ID.
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*
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****************************************************************************/
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void sercom_slowclk_configure(int sercom, int gclkgen);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_SRC_SAMD2L2_SAM_SERCOM_H */
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