148 lines
5.3 KiB
C
148 lines
5.3 KiB
C
/************************************************************************************
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* configs/stm32f4disovery/src/stm32_extmem.c
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*
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* Copyright (C) 2012 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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/************************************************************************************
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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 "up_arch.h"
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#include "stm32.h"
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#include "stm32f4discovery.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, GPIO_FSMC_A3, GPIO_FSMC_A4 , GPIO_FSMC_A5,
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GPIO_FSMC_A6, GPIO_FSMC_A7, GPIO_FSMC_A8, GPIO_FSMC_A9, GPIO_FSMC_A10, GPIO_FSMC_A11,
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GPIO_FSMC_A12, GPIO_FSMC_A13, GPIO_FSMC_A14, GPIO_FSMC_A15, GPIO_FSMC_A16, GPIO_FSMC_A17,
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GPIO_FSMC_A18, GPIO_FSMC_A19, GPIO_FSMC_A20, 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, GPIO_FSMC_D3, GPIO_FSMC_D4 , GPIO_FSMC_D5,
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GPIO_FSMC_D6, GPIO_FSMC_D7, GPIO_FSMC_D8, GPIO_FSMC_D9, GPIO_FSMC_D10, GPIO_FSMC_D11,
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GPIO_FSMC_D12, GPIO_FSMC_D13, GPIO_FSMC_D14, 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 adress 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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