100 lines
3.6 KiB
C
100 lines
3.6 KiB
C
/****************************************************************************
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* boards/arm/stm32/stm3210e-eval/src/stm32_extcontext.c
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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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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <assert.h>
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#include <debug.h>
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#include "arm_internal.h"
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#include "stm32.h"
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#include "stm3210e-eval.h"
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#ifdef CONFIG_STM32_FSMC
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#if STM32_NGPIO_PORTS < 6
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# error "Required GPIO ports not enabled"
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#endif
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_extcontextsave
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*
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* Description:
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* Save current GPIOs that will used by external memory configurations
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*
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****************************************************************************/
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void stm32_extcontextsave(struct extmem_save_s *save)
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{
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DEBUGASSERT(save != NULL);
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save->gpiod_crl = getreg32(STM32_GPIOE_CRL);
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save->gpiod_crh = getreg32(STM32_GPIOE_CRH);
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save->gpioe_crl = getreg32(STM32_GPIOD_CRL);
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save->gpioe_crh = getreg32(STM32_GPIOD_CRH);
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save->gpiof_crl = getreg32(STM32_GPIOF_CRL);
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save->gpiof_crh = getreg32(STM32_GPIOF_CRH);
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save->gpiog_crl = getreg32(STM32_GPIOG_CRL);
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save->gpiog_crh = getreg32(STM32_GPIOG_CRH);
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}
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/****************************************************************************
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* Name: stm32_extcontextrestore
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*
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* Description:
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* Restore GPIOs that were used by external memory configurations
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*
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****************************************************************************/
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void stm32_extcontextrestore(struct extmem_save_s *restore)
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{
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DEBUGASSERT(restore != NULL);
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putreg32(restore->gpiod_crl, STM32_GPIOE_CRL);
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putreg32(restore->gpiod_crh, STM32_GPIOE_CRH);
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putreg32(restore->gpioe_crl, STM32_GPIOD_CRL);
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putreg32(restore->gpioe_crh, STM32_GPIOD_CRH);
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putreg32(restore->gpiof_crl, STM32_GPIOF_CRL);
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putreg32(restore->gpiof_crh, STM32_GPIOF_CRH);
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putreg32(restore->gpiog_crl, STM32_GPIOG_CRL);
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putreg32(restore->gpiog_crh, STM32_GPIOG_CRH);
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}
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#endif /* CONFIG_STM32_FSMC */
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