nuttx/configs/fire-stm32v2/src/stm32_selectlcd.c

/************************************************************************************
 * configs/fire-stm32v2/src/stm32_selectlcd.c
 *
 *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * 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 <assert.h>
#include <debug.h>

#include <arch/board/board.h>

#include "chip.h"
#include "up_arch.h"

#include "stm32_fsmc.h"
#include "stm32_gpio.h"
#include "stm32.h"
#include "fire-stm32v2.h"

#ifdef CONFIG_STM32_FSMC

/************************************************************************************
 * Pre-processor Definitions
 ************************************************************************************/

#ifndef CONFIG_STM32_FSMC
#  warning "FSMC is not enabled"
#endif

#if STM32_NGPIO_PORTS < 6
#  error "Required GPIO ports not enabled"
#endif

/************************************************************************************
 * Public Data
 ************************************************************************************/

/* 2.4" TFT + Touchscreen.  FSMC Bank1
 *
 * --- ------ -------------- -------------------------------------------------------------------
 * PIN NAME   SIGNAL         NOTES
 * --- ------ -------------- -------------------------------------------------------------------
 *
 * 30  PA5    PA5-SPI1-SCK   2.4" TFT + Touchscreen, 10Mbit ENC28J60, SPI 2M FLASH
 * 31  PA6    PA6-SPI1-MISO  2.4" TFT + Touchscreen, 10Mbit ENC28J60, SPI 2M FLASH
 * 32  PA7    PA7-SPI1-MOSI  2.4" TFT + Touchscreen, 10Mbit ENC28J60, SPI 2M FLASH
 * 92  PB6    PB6-I2C1-SCL   2.4" TFT + Touchscreen, AT24C02
 * 93  PB7    PB7-I2C1-SDA   2.4" TFT + Touchscreen, AT24C02
 * 81  PD0    PD0-FSMC_D2    2.4" TFT + Touchscreen
 * 82  PD1    PD1-FSMC_D3    2.4" TFT + Touchscreen
 * 85  PD4    PD4-FSMC_NOE   2.4" TFT + Touchscreen
 * 86  PD5    PD5-FSMC_NWE   2.4" TFT + Touchscreen
 * 88  PD7    PD7-FSMC_NE1   2.4" TFT + Touchscreen
 * 55  PD8    PD8-FSMC_D13   2.4" TFT + Touchscreen
 * 56  PD9    PD9-FSMC_D14   2.4" TFT + Touchscreen
 * 57  PD10   PD10-FSMC_D15  2.4" TFT + Touchscreen
 * 58  PD11   PD11-FSMC_A16  2.4" TFT + Touchscreen
 * 60  PD13   PD13-LCD/LIGHT 2.4" TFT + Touchscreen
 * 61  PD14   PD14-FSMC_D0   2.4" TFT + Touchscreen
 * 62  PD15   PD15-FSMC_D1   2.4" TFT + Touchscreen
 * 98  PE1    PE1-FSMC_NBL1  2.4" TFT + Touchscreen
 * 38  PE7    PE7-FSMC_D4    2.4" TFT + Touchscreen
 * 39  PE8    PE8-FSMC_D5    2.4" TFT + Touchscreen
 * 40  PE9    PE9-FSMC_D6    2.4" TFT + Touchscreen
 * 41  PE10   PE10-FSMC_D7   2.4" TFT + Touchscreen
 * 42  PE11   PE11-FSMC_D8   2.4" TFT + Touchscreen
 * 43  PE12   PE12-FSMC_D9   2.4" TFT + Touchscreen
 * 44  PE13   PE13-FSMC_D10  2.4" TFT + Touchscreen
 * 45  PE14   PE14-FSMC_D11  2.4" TFT + Touchscreen
 * 46  PE15   PE15-FSMC_D12  2.4" TFT + Touchscreen
 *
 * NOTE:  SPI and I2C pin configuration is controlled in the SPI and I2C drivers, respectively.
 */

static const uint16_t g_lcdconfig[NCOMMON_CONFIG] =
{
  /* Address Lines:  A16 only */

  GPIO_NPS_A16,

  /* Data Lines: D0... D15 */

  GPIO_NPS_D0,  GPIO_NPS_D1,  GPIO_NPS_D2,  GPIO_NPS_D3,
  GPIO_NPS_D4,  GPIO_NPS_D5,  GPIO_NPS_D6,  GPIO_NPS_D7,
  GPIO_NPS_D8,  GPIO_NPS_D9,  GPIO_NPS_D10, GPIO_NPS_D11,
  GPIO_NPS_D12, GPIO_NPS_D13, GPIO_NPS_D14, GPIO_NPS_D15,

  /* NOE, NWE, NE1, NBL1 */

  GPIO_NPS_NOE, GPIO_NPS_NWE, GPIO_NPS_NE1, GPIO_NPS_NBL1,

  /* Backlight GPIO */

  GPIO_LCD_BACKLIGHT
};
#define NLCD_CONFIG (sizeof(g_lcdconfig) / sizeof(uint16_t))

/************************************************************************************
 * Private Data
 ************************************************************************************/

/************************************************************************************
 * Private Functions
 ************************************************************************************/

/************************************************************************************
 * Name: stm32_enablefsmc
 *
 * Description:
 *  Enable clocking to the FSMC module
 *
 ************************************************************************************/

static inline void stm32_enablefsmc(void)
{
  uint32_t regval;

  /* Enable AHB clocking to the FSMC */

  regval  = getreg32( STM32_RCC_AHBENR);
  regval |= RCC_AHBENR_FSMCEN;
  putreg32(regval, STM32_RCC_AHBENR);
}

/************************************************************************************
 * Public Functions
 ************************************************************************************/

/************************************************************************************
 * Name: stm32_selectlcd
 *
 * Description:
 *   Initialize to the LCD pin configuration.
 *
 ************************************************************************************/

void stm32_selectlcd(void)
{
  irqstate_t flags;
  int i;

  /* Configure LCD GPIO pis */

  flags = irqsave();
  for (i = 0; i < NLCD_GPIOS; i++)
    {
      stm32_configgpio(g_lcdconfig[i]);
    }

  /* Enable AHB clocking to the FSMC */

  stm32_enablefsmc();

  /* Bank1 NOR/SRAM control register configuration */

  putreg32(FSMC_BCR_SRAM | FSMC_BCR_MWID16 | FSMC_BCR_WREN, STM32_FSMC_BCR1);

  /* Bank1 NOR/SRAM timing register configuration */

  putreg32(FSMC_BTR_ADDSET(1)|FSMC_BTR_ADDHLD(0)|FSMC_BTR_DATAST(2)|FSMC_BTR_BUSTURN(0)|
           FSMC_BTR_CLKDIV(0)|FSMC_BTR_DATLAT(0)|FSMC_BTR_ACCMODA, STM32_FSMC_BTR1);

  putreg32(0xffffffff, STM32_FSMC_BWTR4);

  /* Enable the bank by setting the MBKEN bit */

  putreg32(FSMC_BCR_MBKEN | FSMC_BCR_SRAM | FSMC_BCR_MWID16 | FSMC_BCR_WREN, STM32_FSMC_BCR1);
  irqrestore(flags);
}

#endif /* CONFIG_STM32_FSMC */