|
|
/************************************************************************************
* configs/stm3210e-eval/src/up_selectlcd.c
* arch/arm/src/board/up_selectlcd.c
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Authors: Gregory Nutt <spudmonkey@racsa.co.cr>
* Diego Sanchez <dsanchez@nx-engineering.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <debug.h>
#include "chip.h"
#include "up_arch.h"
#include "stm32.h"
#include "stm3240g-internal.h"
#ifdef CONFIG_STM32_FSMC
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
#if STM32_NGPIO_PORTS < 6
# error "Required GPIO ports not enabled"
#endif
/* SRAM pin definitions */
#define LCD_NADDRLINES 1
#define LCD_NDATALINES 16
/************************************************************************************
* Public Data
************************************************************************************/
/************************************************************************************
* Private Data
************************************************************************************/
/* Pin Usage (per schematic)
* SRAM LCD
* D[0..15] [0..15] [0..15]
* A[0..25] [0..22] [0] RS
* FSMC_NBL0 PE0 OUT --- ---
* FSMC_NBL1 PE1 OUT --- ---
* FSMC_NE2 PG9 OUT --- ---
* FSMC_NE3 PG10 OUT --- ~CS
* FSMC_NE4 PG12 OUT --- ---
* FSMC_NWE PD5 OUT --- ~WR/SCL
* FSMC_NOE PD4 OUT --- ~RD
* FSMC_NWAIT PD6 IN --- ---
* FSMC_INT2 PG6* IN --- ---
* FSMC_INT3
* FSMC_INTR
* FSMC_CD
* FSMC_CLK
* FSMC_NCE2
* FSMC_NCE3
* FSMC_NCE4_1
* FSMC_NCE4_2
* FSMC_NIORD
* FSMC_NIOWR
* FSMC_NL
* FSMC_NREG
*/
/* GPIO configurations unique to the LCD */
static const uint32_t g_lcdconfig[] =
{
/* NOE, NWE, and NE3 */
GPIO_FSMC_NOE, GPIO_FSMC_NWE, GPIO_FSMC_NE3
};
#define NLCD_CONFIG (sizeof(g_lcdconfig)/sizeof(uint32_t))
/************************************************************************************
* Private Functions
************************************************************************************/
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: stm32_selectlcd
*
* Description:
* Initialize to the LCD
*
************************************************************************************/
void stm32_selectlcd(void)
{
/* Configure new GPIO pins */
stm32_extmemaddr(LCD_NADDRLINES); /* Common address lines: A0 */
stm32_extmemdata(LCD_NDATALINES); /* Common data lines: D0-D15 */
stm32_extmemgpios(g_lcdconfig, NLCD_CONFIG); /* LCD-specific control lines */
/* Enable AHB clocking to the FSMC */
stm32_enablefsmc();
/* Color LCD configuration (LCD configured as follow):
*
* - Data/Address MUX = Disable "FSMC_BCR_MUXEN" just not enable it.
* - Extended Mode = Disable "FSMC_BCR_EXTMOD"
* - Memory Type = SRAM "FSMC_BCR_SRAM"
* - Data Width = 16bit "FSMC_BCR_MWID16"
* - Write Operation = Enable "FSMC_BCR_WREN"
* - Asynchronous Wait = Disable
*/
/* Bank3 NOR/SRAM control register configuration */
putreg32(FSMC_BCR_SRAM | FSMC_BCR_MWID16 | FSMC_BCR_WREN, STM32_FSMC_BCR3);
/* Bank3 NOR/SRAM timing register configuration */
putreg32(FSMC_BTR_ADDSET(5) | FSMC_BTR_ADDHLD(0) | FSMC_BTR_DATAST(9) | FSMC_BTR_BUSTRUN(0) |
FSMC_BTR_CLKDIV(0) | FSMC_BTR_DATLAT(0) | FSMC_BTR_ACCMODA, STM32_FSMC_BTR3);
putreg32(0xffffffff, STM32_FSMC_BWTR3);
/* Enable the bank by setting the MBKEN bit */
putreg32(FSMC_BCR_MBKEN | FSMC_BCR_SRAM | FSMC_BCR_MWID16 | FSMC_BCR_WREN, STM32_FSMC_BCR3);
}
#endif /* CONFIG_STM32_FSMC */
|
