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/****************************************************************************
* configs/maple/src/stm32_lcd.c
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
* Modified: Librae <librae8226@gmail.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 <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/memlcd.h>
#include "chip.h"
#include "up_arch.h"
#include "up_internal.h"
#include "stm32.h"
#include "maple-internal.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
#define EXTCOMIN_FREQ 24
#define TIMER_FREQ 1200 /* 72000000/60000 */
/* Debug ********************************************************************/
/* 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
#ifdef CONFIG_DEBUG_LCD
# define lcddbg(format, ...) vdbg(format, ##__VA_ARGS__)
#else
# define lcddbg(x...)
#endif
/****************************************************************************
* Private Data
****************************************************************************/
static struct lcd_dev_s *l_lcddev;
static struct spi_dev_s *spi;
static struct stm32_tim_dev_s *tim;
static xcpt_t g_isr;
/****************************************************************************
* Private Functions
****************************************************************************/
static int up_lcdextcominisr(int irq, void *context)
{
STM32_TIM_ACKINT(tim, 0);
if (g_isr == NULL)
{
lcddbg("error, irq not attached, disabled\n");
STM32_TIM_DISABLEINT(tim, 0);
return OK;
}
return g_isr(irq, context);
}
static int up_lcdirqattach(xcpt_t isr)
{
lcddbg("%s IRQ\n", isr == NULL ? "Detach" : "Attach");
if (isr != NULL)
{
STM32_TIM_SETISR(tim, up_lcdextcominisr, 0);
g_isr = isr;
}
else
{
STM32_TIM_SETISR(tim, NULL, 0);
g_isr = NULL;
}
return OK;
}
static void up_lcddispcontrol(bool on)
{
lcddbg("set: %s\n", on ? "on" : "off");
if (on)
{
stm32_gpiowrite(GPIO_MEMLCD_DISP, 1);
STM32_TIM_ENABLEINT(tim, 0);
}
else
{
stm32_gpiowrite(GPIO_MEMLCD_DISP, 0);
STM32_TIM_DISABLEINT(tim, 0);
}
}
#ifndef CONFIG_MEMLCD_EXTCOMIN_MODE_HW
static void up_lcdsetpolarity(bool pol)
{
stm32_gpiowrite(GPIO_LED, pol);
stm32_gpiowrite(GPIO_MEMLCD_EXTCOMIN, pol);
}
#endif
static void up_lcdsetvcomfreq(unsigned int freq)
{
lcddbg("freq: %d\n", freq);
DEBUGASSERT(freq >= 1 && freq <= 60);
STM32_TIM_SETPERIOD(tim, TIMER_FREQ / freq);
}
static FAR struct memlcd_priv_s memlcd_priv =
{
.attachirq = up_lcdirqattach,
.dispcontrol = up_lcddispcontrol,
#ifndef CONFIG_MEMLCD_EXTCOMIN_MODE_HW
.setpolarity = up_lcdsetpolarity,
#endif
.setvcomfreq = up_lcdsetvcomfreq,
};
/****************************************************************************
* 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).
*
****************************************************************************/
FAR int board_lcd_initialize(void)
{
lcddbg("Initializing lcd\n");
lcddbg("init spi1\n");
spi = up_spiinitialize(1);
DEBUGASSERT(spi);
lcddbg("configure related io\n");
stm32_configgpio(GPIO_MEMLCD_EXTCOMIN);
stm32_configgpio(GPIO_MEMLCD_DISP);
lcddbg("configure EXTCOMIN timer\n");
if (tim == NULL)
{
tim = stm32_tim_init(2);
DEBUGASSERT(tim);
STM32_TIM_SETPERIOD(tim, TIMER_FREQ / EXTCOMIN_FREQ);
STM32_TIM_SETCLOCK(tim, TIMER_FREQ);
STM32_TIM_SETMODE(tim, STM32_TIM_MODE_UP);
}
lcddbg("init lcd\n");
l_lcddev = memlcd_initialize(spi, &memlcd_priv, 0);
DEBUGASSERT(l_lcddev);
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 l_lcddev;
}
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