170 lines
5.9 KiB
C
170 lines
5.9 KiB
C
/************************************************************************************
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* configs/stm3210e-eval/src/up_selectlcd.c
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* arch/arm/src/board/up_selectlcd.c
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*
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* Copyright (C) 2012 Gregory Nutt. All rights reserved.
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* Authors: Gregory Nutt <spudmonkey@racsa.co.cr>
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* Diego Sanchez <dsanchez@nx-engineering.com>
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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 <debug.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 "stm3240g-internal.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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/* SRAM pin definitions */
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#define LCD_NADDRLINES 1
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#define LCD_NDATALINES 16
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/************************************************************************************
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* Public Data
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************************************************************************************/
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/************************************************************************************
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* Private Data
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************************************************************************************/
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/* Pin Usage (per schematic)
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* SRAM LCD
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* D[0..15] [0..15] [0..15]
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* A[0..25] [0..22] [0] RS
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* FSMC_NBL0 PE0 OUT --- ---
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* FSMC_NBL1 PE1 OUT --- ---
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* FSMC_NE2 PG9 OUT --- ---
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* FSMC_NE3 PG10 OUT --- ~CS
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* FSMC_NE4 PG12 OUT --- ---
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* FSMC_NWE PD5 OUT --- ~WR/SCL
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* FSMC_NOE PD4 OUT --- ~RD
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* FSMC_NWAIT PD6 IN --- ---
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* FSMC_INT2 PG6* IN --- ---
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* FSMC_INT3
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* FSMC_INTR
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* FSMC_CD
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* FSMC_CLK
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* FSMC_NCE2
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* FSMC_NCE3
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* FSMC_NCE4_1
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* FSMC_NCE4_2
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* FSMC_NIORD
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* FSMC_NIOWR
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* FSMC_NL
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* FSMC_NREG
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*/
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/* GPIO configurations unique to the LCD */
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static const uint32_t g_lcdconfig[] =
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{
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/* NOE, NWE, and NE3 */
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GPIO_FSMC_NOE, GPIO_FSMC_NWE, GPIO_FSMC_NE3
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};
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#define NLCD_CONFIG (sizeof(g_lcdconfig)/sizeof(uint32_t))
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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_selectlcd
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*
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* Description:
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* Initialize to the LCD
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*
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************************************************************************************/
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void stm32_selectlcd(void)
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{
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/* Configure new GPIO pins */
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stm32_extmemaddr(LCD_NADDRLINES); /* Common address lines: A0 */
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stm32_extmemdata(LCD_NDATALINES); /* Common data lines: D0-D15 */
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stm32_extmemgpios(g_lcdconfig, NLCD_CONFIG); /* LCD-specific control lines */
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/* Enable AHB clocking to the FSMC */
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stm32_enablefsmc();
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/* Color LCD configuration (LCD configured as follow):
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*
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* - Data/Address MUX = Disable "FSMC_BCR_MUXEN" just not enable it.
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* - Extended Mode = Disable "FSMC_BCR_EXTMOD"
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* - Memory Type = SRAM "FSMC_BCR_SRAM"
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* - Data Width = 16bit "FSMC_BCR_MWID16"
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* - Write Operation = Enable "FSMC_BCR_WREN"
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* - Asynchronous Wait = Disable
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*/
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/* Bank3 NOR/SRAM control register configuration */
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putreg32(FSMC_BCR_SRAM | FSMC_BCR_MWID16 | FSMC_BCR_WREN, STM32_FSMC_BCR3);
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/* Bank3 NOR/SRAM timing register configuration */
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putreg32(FSMC_BTR_ADDSET(5) | FSMC_BTR_ADDHLD(0) | FSMC_BTR_DATAST(9) | FSMC_BTR_BUSTRUN(0) |
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FSMC_BTR_CLKDIV(0) | FSMC_BTR_DATLAT(0) | FSMC_BTR_ACCMODA, STM32_FSMC_BTR3);
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putreg32(0xffffffff, STM32_FSMC_BWTR3);
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/* Enable the bank by setting the MBKEN bit */
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putreg32(FSMC_BCR_MBKEN | FSMC_BCR_SRAM | FSMC_BCR_MWID16 | FSMC_BCR_WREN, STM32_FSMC_BCR3);
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}
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#endif /* CONFIG_STM32_FSMC */
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