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nuttx/configs/stm32f4discovery/src/stm32_ssd1289.c

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/**************************************************************************************
* configs/stm32fdiscover/src/stm32_ssd1289.c
*
* This logic supports the connection of an SSD1289-based LCD to the STM32F4Discovery
* board.
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Authors: 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 <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/board.h>
#include <nuttx/spi/spi.h>
#include <nuttx/lcd/lcd.h>
#include <nuttx/lcd/ssd1289.h>
#include <arch/board/board.h>
#include "up_arch.h"
#include "stm32.h"
#include "stm32f4discovery.h"
#ifdef CONFIG_LCD_SSD1289
/**************************************************************************************
* Pre-processor Definitions
**************************************************************************************/
/* Configuration **********************************************************************/
#ifndef CONFIG_STM32_FSMC
# error "CONFIG_STM32_FSMC is required to use the LCD"
#endif
/* Define CONFIG_DEBUG_LCD to enable detailed LCD debug output. Verbose debug must
* also be enabled.
*/
#ifndef CONFIG_DEBUG
# undef CONFIG_DEBUG_VERBOSE
# undef CONFIG_DEBUG_GRAPHICS
# undef CONFIG_DEBUG_LCD
#endif
#ifndef CONFIG_DEBUG_VERBOSE
# undef CONFIG_DEBUG_LCD
#endif
/* STM32F4Discovery LCD Hardware Definitions ******************************************/
/* LCD /CS is CE1 == NOR/SRAM Bank 1
*
* Bank 1 = 0x60000000 | 0x00000000
* Bank 2 = 0x60000000 | 0x04000000
* Bank 3 = 0x60000000 | 0x08000000
* Bank 4 = 0x60000000 | 0x0c000000
*
* FSMC address bit 16 is used to distinguish command and data. FSMC address bits
* 0-24 correspond to ARM address bits 1-25.
*/
#define STM32_LCDBASE ((uintptr_t)(0x60000000 | 0x00000000))
#define LCD_INDEX (STM32_LCDBASE)
#define LCD_DATA (STM32_LCDBASE + 0x00020000)
/* SRAM pin definitions */
#define LCD_NADDRLINES 1 /* A16 */
#define LCD_NDATALINES 16 /* D0-15 */
/* Debug ******************************************************************************/
#ifdef CONFIG_DEBUG_LCD
# define lcddbg dbg
# define lcdvdbg vdbg
#else
# define lcddbg(x...)
# define lcdvdbg(x...)
#endif
/**************************************************************************************
* Private Type Definition
**************************************************************************************/
/**************************************************************************************
* Private Function Protototypes
**************************************************************************************/
/* Low Level LCD access */
static void stm32_select(FAR struct ssd1289_lcd_s *dev);
static void stm32_deselect(FAR struct ssd1289_lcd_s *dev);
static void stm32_index(FAR struct ssd1289_lcd_s *dev, uint8_t index);
#ifndef CONFIG_SSD1289_WRONLY
static uint16_t stm32_read(FAR struct ssd1289_lcd_s *dev);
#endif
static void stm32_write(FAR struct ssd1289_lcd_s *dev, uint16_t data);
static void stm32_backlight(FAR struct ssd1289_lcd_s *dev, int power);
/**************************************************************************************
* Private Data
**************************************************************************************/
/* LCD pin mapping (see configs/stm324discovery/README.txt
* MAPPING TO STM32 F4:
*
* ---------------- ------------- ----------------------------------
* STM32 FUNCTION LCD PIN STM32F4Discovery PIN
* ---------------- ------------- ----------------------------------
* FSMC_D0 D0 pin 4 PD14 P1 pin 46 Conflict (Note 1)
* FSMC_D1 D1 pin 3 PD15 P1 pin 47 Conflict (Note 2)
* FSMC_D2 D2 pin 6 PD0 P2 pin 36 Free I/O
* FSMC_D3 D3 pin 5 PD1 P2 pin 33 Free I/O
* FSMC_D4 D4 pin 8 PE7 P1 pin 25 Free I/O
* FSMC_D5 D5 pin 7 PE8 P1 pin 26 Free I/O
* FSMC_D6 D6 pin 10 PE9 P1 pin 27 Free I/O
* FSMC_D7 D7 pin 9 PE10 P1 pin 28 Free I/O
* FSMC_D8 D8 pin 12 PE11 P1 pin 29 Free I/O
* FSMC_D9 D9 pin 11 PE12 P1 pin 30 Free I/O
* FSMC_D10 D10 pin 14 PE13 P1 pin 31 Free I/O
* FSMC_D11 D11 pin 13 PE14 P1 pin 32 Free I/O
* FSMC_D12 D12 pin 16 PE15 P1 pin 33 Free I/O
* FSMC_D13 D13 pin 15 PD8 P1 pin 40 Free I/O
* FSMC_D14 D14 pin 18 PD9 P1 pin 41 Free I/O
* FSMC_D15 D15 pin 17 PD10 P1 pin 42 Free I/O
* FSMC_A16 RS pin 19 PD11 P1 pin 27 Free I/O
* FSMC_NE1 ~CS pin 10 PD7 P2 pin 27 Free I/O
* FSMC_NWE ~WR pin 22 PD5 P2 pin 29 Conflict (Note 3)
* FSMC_NOE ~RD pin 21 PD4 P2 pin 32 Conflict (Note 4)
* PC6 RESET pin 24 PC6 P2 pin 47 Free I/O
* ---------------- ------------- ----------------------------------
*
* 1 Used for the RED LED
* 2 Used for the BLUE LED
* 3 Used for the RED LED and for OTG FS Overcurrent. It may be okay to use
* for the parallel interface if PC0 is held high (or floating). PC0 enables
* the STMPS2141STR IC power switch that drives the OTG FS host VBUS.
* 4 Also the reset pin for the CS43L22 audio Codec.
*/
#define GPIO_LCD_RESET (GPIO_OUTPUT|GPIO_PUSHPULL|GPIO_SPEED_50MHz|\
GPIO_OUTPUT_SET|GPIO_PORTC|GPIO_PIN6)
/* GPIO configurations unique to the LCD */
static const uint32_t g_lcdconfig[] =
{
/* PC6(RESET), FSMC_A16, FSMC_NOE, FSMC_NWE, and FSMC_NE1 */
GPIO_LCD_RESET, GPIO_FSMC_A16, GPIO_FSMC_NOE, GPIO_FSMC_NWE, GPIO_FSMC_NE1
};
#define NLCD_CONFIG (sizeof(g_lcdconfig)/sizeof(uint32_t))
/* This is the driver state structure (there is no retained state information) */
static struct ssd1289_lcd_s g_ssd1289 =
{
.select = stm32_select,
.deselect = stm32_deselect,
.index = stm32_index,
#ifndef CONFIG_SSD1289_WRONLY
.read = stm32_read,
#endif
.write = stm32_write,
.backlight = stm32_backlight
};
/* The saved instance of the LCD driver */
static FAR struct lcd_dev_s *g_ssd1289drvr;
/**************************************************************************************
* Private Functions
**************************************************************************************/
/**************************************************************************************
* Name: stm32_select
*
* Description:
* Select the LCD device
*
**************************************************************************************/
static void stm32_select(FAR struct ssd1289_lcd_s *dev)
{
/* Does not apply to this hardware */
}
/**************************************************************************************
* Name: stm32_deselect
*
* Description:
* De-select the LCD device
*
**************************************************************************************/
static void stm32_deselect(FAR struct ssd1289_lcd_s *dev)
{
/* Does not apply to this hardware */
}
/**************************************************************************************
* Name: stm32_deselect
*
* Description:
* Set the index register
*
**************************************************************************************/
static void stm32_index(FAR struct ssd1289_lcd_s *dev, uint8_t index)
{
putreg16((uint16_t)index, LCD_INDEX);
}
/**************************************************************************************
* Name: stm32_read
*
* Description:
* Read LCD data (GRAM data or register contents)
*
**************************************************************************************/
#ifndef CONFIG_SSD1289_WRONLY
static uint16_t stm32_read(FAR struct ssd1289_lcd_s *dev)
{
return getreg16(LCD_DATA);
}
#endif
/**************************************************************************************
* Name: stm32_write
*
* Description:
* Write LCD data (GRAM data or register contents)
*
**************************************************************************************/
static void stm32_write(FAR struct ssd1289_lcd_s *dev, uint16_t data)
{
putreg16((uint16_t)data, LCD_DATA);
}
/**************************************************************************************
* Name: stm32_write
*
* Description:
* Write LCD data (GRAM data or register contents)
*
**************************************************************************************/
static void stm32_backlight(FAR struct ssd1289_lcd_s *dev, int power)
{
#warning "Missing logic"
}
/************************************************************************************
* Name: stm32_selectlcd
*
* Description:
* Initialize to the LCD
*
************************************************************************************/
void stm32_selectlcd(void)
{
/* Configure GPIO pins */
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
*/
/* 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(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_BTR1);
putreg32(0xffffffff, STM32_FSMC_BWTR1);
/* Enable the bank by setting the MBKEN bit */
putreg32(FSMC_BCR_MBKEN | FSMC_BCR_SRAM | FSMC_BCR_MWID16 | FSMC_BCR_WREN, STM32_FSMC_BCR1);
}
/**************************************************************************************
* Public Functions
**************************************************************************************/
/**************************************************************************************
* Name: board_lcd_initialize
*
* Description:
* Initialize the LCD video hardware. The initial state of the LCD is fully
* initialized, display memory cleared, and the LCD ready to use, but with the power
* setting at 0 (full off).
*
**************************************************************************************/
int board_lcd_initialize(void)
{
/* Only initialize the driver once */
if (!g_ssd1289drvr)
{
lcdvdbg("Initializing\n");
/* Configure GPIO pins and configure the FSMC to support the LCD */
stm32_selectlcd();
/* Reset the LCD (active low) */
stm32_gpiowrite(GPIO_LCD_RESET, false);
up_mdelay(5);
stm32_gpiowrite(GPIO_LCD_RESET, true);
/* Configure and enable the LCD */
up_mdelay(50);
g_ssd1289drvr = ssd1289_lcdinitialize(&g_ssd1289);
if (!g_ssd1289drvr)
{
lcddbg("ERROR: ssd1289_lcdinitialize failed\n");
return -ENODEV;
}
}
/* Clear the display (setting it to the color 0=black) */
#if 0 /* Already done in the driver */
ssd1289_clear(g_ssd1289drvr, 0);
#endif
/* Turn the display off */
g_ssd1289drvr->setpower(g_ssd1289drvr, 0);
return OK;
}
/**************************************************************************************
* Name: board_lcd_getdev
*
* Description:
* Return a a reference to the LCD object for the specified LCD. This allows support
* for multiple LCD devices.
*
**************************************************************************************/
FAR struct lcd_dev_s *board_lcd_getdev(int lcddev)
{
DEBUGASSERT(lcddev == 0);
return g_ssd1289drvr;
}
/**************************************************************************************
* Name: board_lcd_uninitialize
*
* Description:
* Unitialize the LCD support
*
**************************************************************************************/
void board_lcd_uninitialize(void)
{
/* Turn the display off */
g_ssd1289drvr->setpower(g_ssd1289drvr, 0);
}
#endif /* CONFIG_LCD_SSD1289 */
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