95 lines
3.4 KiB
C
95 lines
3.4 KiB
C
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/****************************************************************************
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* configs/lpcxpresso-lpc54628/src/lpc54_bringup.c
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*
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* Copyright (C) 2017 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 "lpc54_emc.h.h"
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#include "lpcxpresso-lpc54628.h"
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#include <arch/board/board.h>
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#ifdef CONFIG_LPC54_EMC
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* EMC basic configuration. */
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static const struct emc_config_s g_emc_config =
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{
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.bigendian = false, /* Little endian */
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.clksrc = EMC_INTLOOPBACK; /* Internal loop back from EMC_CLK output */
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#ifdef BOARD_220MHz
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.clkdiv = 3; /* EMC Clock = CPU FREQ/3 */
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#else /* if BOARD_180MHz */
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.clkdiv = 2; /* EMC Clock = CPU FREQ/2 */
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#endif
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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: lpc54_sdram_initialize
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*
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* Description:
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* Initialize external SDRAM
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*
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****************************************************************************/
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void lpc54_sdram_initialize(void)
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{
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/* Dynamic memory timing configuration. */
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#warning Missing logic
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/* Dynamic memory chip specific configuration: Chip 0 - MTL48LC8M16A2B4-6A */
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#warning Missing logic
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/* EMC Basic configuration. */
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lpc54_emc_initialize(EMC, &g_emc_config);
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/* EMC Dynamc memory configuration. */
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#warning Missing logic
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}
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#endif /* CONFIG_LPC54_EMC */
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