140 lines
4.4 KiB
C
140 lines
4.4 KiB
C
/****************************************************************************
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* boards/arm/stm32/stm3240g-eval/src/stm32_extmem.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 <stdint.h>
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#include <assert.h>
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#include <debug.h>
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#include <arch/board/board.h>
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#include "chip.h"
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#include "arm_internal.h"
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#include "stm32_gpio.h"
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#include "stm32.h"
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#include "stm3240g-eval.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef CONFIG_STM32_FSMC
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# warning "FSMC is not enabled"
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#endif
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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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#define STM32_FSMC_NADDRCONFIGS 26
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#define STM32_FSMC_NDATACONFIGS 16
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/* GPIO configurations common to most external memories */
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static const uint32_t g_addressconfig[STM32_FSMC_NADDRCONFIGS] =
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{
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GPIO_FSMC_A0, GPIO_FSMC_A1, GPIO_FSMC_A2,
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GPIO_FSMC_A3, GPIO_FSMC_A4, GPIO_FSMC_A5,
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GPIO_FSMC_A6, GPIO_FSMC_A7, GPIO_FSMC_A8,
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GPIO_FSMC_A9, GPIO_FSMC_A10, GPIO_FSMC_A11,
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GPIO_FSMC_A12, GPIO_FSMC_A13, GPIO_FSMC_A14,
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GPIO_FSMC_A15, GPIO_FSMC_A16, GPIO_FSMC_A17,
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GPIO_FSMC_A18, GPIO_FSMC_A19, GPIO_FSMC_A20,
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GPIO_FSMC_A21, GPIO_FSMC_A22, GPIO_FSMC_A23,
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GPIO_FSMC_A24, GPIO_FSMC_A25
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};
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static const uint32_t g_dataconfig[STM32_FSMC_NDATACONFIGS] =
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{
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GPIO_FSMC_D0, GPIO_FSMC_D1, GPIO_FSMC_D2,
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GPIO_FSMC_D3, GPIO_FSMC_D4, GPIO_FSMC_D5,
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GPIO_FSMC_D6, GPIO_FSMC_D7, GPIO_FSMC_D8,
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GPIO_FSMC_D9, GPIO_FSMC_D10, GPIO_FSMC_D11,
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GPIO_FSMC_D12, GPIO_FSMC_D13, GPIO_FSMC_D14,
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GPIO_FSMC_D15
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};
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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_extmemgpios
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*
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* Description:
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* Initialize GPIOs for external memory usage
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*
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****************************************************************************/
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void stm32_extmemgpios(const uint32_t *gpios, int ngpios)
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{
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int i;
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/* Configure GPIOs */
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for (i = 0; i < ngpios; i++)
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{
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stm32_configgpio(gpios[i]);
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}
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}
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/****************************************************************************
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* Name: stm32_extmemaddr
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*
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* Description:
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* Initialize address line GPIOs for external memory access
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*
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****************************************************************************/
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void stm32_extmemaddr(int naddrs)
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{
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stm32_extmemgpios(g_addressconfig, naddrs);
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}
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/****************************************************************************
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* Name: stm32_extmemdata
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*
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* Description:
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* Initialize data line GPIOs for external memory access
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*
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****************************************************************************/
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void stm32_extmemdata(int ndata)
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{
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stm32_extmemgpios(g_dataconfig, ndata);
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}
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