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nuttx-bb/nuttx/configs/pic32mx7mmb/src/up_mio283qt2.c

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/**************************************************************************************
* configs/stm32fdiscover/src/up_mio283qt2.c
* arch/arm/src/board/up_mio283qt2.c
*
* Interface definition for the MI0283QT-2 LCD from Multi-Inno Technology Co., Ltd.
* This LCD is based on the Himax HX8347-D LCD controller.
*
* 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 <errno.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/lcd/lcd.h>
#include <nuttx/lcd/mio283qt2.h>
#include <arch/board/board.h>
#include "up_arch.h"
#include "pic32mx-internal.h"
#include "pic32mx-pmp.h"
#include "pic32mx7mmb_internal.h"
#ifdef CONFIG_LCD_MIO283QT2
/**************************************************************************************
* Pre-processor Definitions
**************************************************************************************/
/* Configuration **********************************************************************/
#ifndef CONFIG_PIC32MX_PMP
# error "CONFIG_PIC32MX_PMP 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
/* PIC32MX7MMB LCD Hardware Definitions ***********************************************/
/* --- ---------------------------------- -------------------- ------------------------
* PIN CONFIGURATIONS SIGNAL NAME ON-BOARD CONNECTIONS
* (Family Data Sheet Table 1-1) (PIC32MX7 Schematic)
* --- ---------------------------------- -------------------- ------------------------
* 6 RC1/T2CK LCD_RST TFT display
* 43 PMA1/AETXD3/AN14/ERXD2/PMALH/RB14 LCD-CS# TFT display, HDR2 pin 3
* 77 OC3/RD2 LCD_BLED LCD backlight LED
* 44 PMA0/AETXD2/AN15/CN12/ERXD3/OCFB/ LCD-RS TFT display
* PMALL/RB15
*
* 34 PMA13/AN10/RB10/CVREFOUT LCD-YD TFT display
* 35 PMA12/AETXERR/AN11/ERXERR/RB11 LCD-XR TFT display
* 41 PMA11/AECRS/AN12/ERXD0/RB12 LCD-YU TFT display
* 42 PMA10/AECOL/AN13/ERXD1/RB13 LCD-XL TFT display
*
* 93 PMD0/RE0 PMPD0 TFT display, HDR1 pin 18
* 94 PMD1/RE1 PMPD1 TFT display, HDR1 pin 17
* 98 PMD2/RE2 PMPD2 TFT display, HDR1 pin 16
* 99 PMD3/RE3 PMPD3 TFT display, HDR1 pin 15
* 100 PMD4/RE4 PMPD4 TFT display, HDR1 pin 14
* 3 PMD5/RE5 PMPD5 TFT display, HDR1 pin 13
* 4 PMD6/RE6 PMPD6 TFT display, HDR1 pin 12
* 5 PMD7/RE7 PMPD7 TFT display, HDR1 pin 11
* 90 PMD8/C2RX/RG0 PMPD8 TFT display, HDR1 pin 10
* 89 PMD9/C2TX/ETXERR/RG1 PMPD9 TFT display, HDR1 pin 9
* 88 PMD10/C1TX/ETXD0/RF1 PMPD10 TFT display, HDR1 pin 8
* 87 PMD11/C1RX/ETXD1/RF0 PMPD11 TFT display, HDR1 pin 7
* 79 PMD12/ETXD2/IC5/RD12 PMPD12 TFT display, HDR1 pin 6
* 80 PMD13/CN19/ETXD3/RD13 PMPD13 TFT display, HDR1 pin 5
* 83 PMD14/CN15/ETXEN/RD6 PMPD14 TFT display, HDR1 pin 4
* 84 PMD15/CN16/ETXCLK/RD7 PMPD15 TFT display, HDR1 pin 3
*
* 82 CN14/PMRD/RD5 PMPRD
* 81 CN13/OC5/PMWR/RD4 PMPWR
*/
/* RC1, Reset -- Low value holds in reset */
#define GPIO_LCD_RST (GPIO_OUTPUT|GPIO_VALUE_ZERO|GPIO_PORTC|GPIO_PIN1)
/* RB14, LCD select -- Low value selects LCD */
#define GPIO_LCD_CS (GPIO_OUTPUT|GPIO_VALUE_ONE|GPIO_PORTB|GPIO_PIN14)
/* RD2, Backlight -- Low value turns off */
#define GPIO_LCD_BLED (GPIO_OUTPUT|GPIO_VALUE_ZERO|GPIO_PORTD|GPIO_PIN2)
/* RB15, RS -- High values selects data */
#define GPIO_LCD_RS (GPIO_OUTPUT|GPIO_VALUE_ZERO|GPIO_PORTB|GPIO_PIN15)
/* Debug ******************************************************************************/
#ifdef CONFIG_DEBUG_LCD
# define lcddbg dbg
# define lcdvdbg vdbg
#else
# define lcddbg(x...)
# define lcdvdbg(x...)
#endif
/**************************************************************************************
* Private Type Definition
**************************************************************************************/
struct pic32mx7mmb_dev_s
{
struct mio283qt2_lcd_s dev; /* The externally visible part of the driver */
bool data; /* true=data selected */
bool selected; /* true=LCD selected */
bool reading; /* true=We are in a read sequence */
FAR struct lcd_dev_s *drvr; /* The saved instance of the LCD driver */
};
/**************************************************************************************
* Private Function Protototypes
**************************************************************************************/
/* Low Level LCD access */
static void pic32mx_select(FAR struct mio283qt2_lcd_s *dev);
static void pic32mx_deselect(FAR struct mio283qt2_lcd_s *dev);
static void pic32mx_index(FAR struct mio283qt2_lcd_s *dev, uint8_t index);
#ifndef CONFIG_MIO283QT2_WRONLY
static uint16_t pic32mx_read(FAR struct mio283qt2_lcd_s *dev);
#endif
static void pic32mx_write(FAR struct mio283qt2_lcd_s *dev, uint16_t data);
static void pic32mx_backlight(FAR struct mio283qt2_lcd_s *dev, int power);
/**************************************************************************************
* Private Data
**************************************************************************************/
/* This is the driver state structure (there is no retained state information) */
static struct pic32mx7mmb_dev_s g_pic32mx7mmb_lcd =
{
{
.select = pic32mx_select,
.deselect = pic32mx_deselect,
.index = pic32mx_index,
#ifndef CONFIG_MIO283QT2_WRONLY
.read = pic32mx_read,
#endif
.write = pic32mx_write,
.backlight = pic32mx_backlight
}
};
/**************************************************************************************
* Private Functions
**************************************************************************************/
/**************************************************************************************
* Name: pic32mx_command
*
* Description:
* Configure to write an LCD command
*
**************************************************************************************/
static void pic32mx_command(FAR struct pic32mx7mmb_dev_s *priv)
{
/* Low selects command */
if (priv->data)
{
pic32mx_gpiowrite(GPIO_LCD_RS, false);
priv->data = false; /* Command, not data */
priv->reading = false; /* No read sequence in progress */
}
}
/**************************************************************************************
* Name: pic32mx_data
*
* Description:
* Configure to read or write LCD data
*
**************************************************************************************/
static void pic32mx_data(FAR struct pic32mx7mmb_dev_s *priv)
{
/* Hi selects data */
if (!priv->data)
{
pic32mx_gpiowrite(GPIO_LCD_RS, true);
priv->data = true; /* Data, not command */
priv->reading = false; /* No read sequence in progress */
}
}
/**************************************************************************************
* Name: pic32mx_data
*
* Description:
* Wait until the PMP is no longer busy
*
**************************************************************************************/
static void pic32mx_busywait(void)
{
while ((getreg32(PIC32MX_PMP_MODE) & PMP_MODE_BUSY) != 0);
}
/**************************************************************************************
* Name: pic32mx_select
*
* Description:
* Select the LCD device
*
**************************************************************************************/
static void pic32mx_select(FAR struct mio283qt2_lcd_s *dev)
{
FAR struct pic32mx7mmb_dev_s *priv = (FAR struct pic32mx7mmb_dev_s *)dev;
/* CS low selects */
if (!priv->selected)
{
pic32mx_gpiowrite(GPIO_LCD_CS, false);
priv->selected = true; /* LCD selected */
priv->reading = false; /* No read sequence in progress */
}
}
/**************************************************************************************
* Name: pic32mx_deselect
*
* Description:
* De-select the LCD device
*
**************************************************************************************/
static void pic32mx_deselect(FAR struct mio283qt2_lcd_s *dev)
{
FAR struct pic32mx7mmb_dev_s *priv = (FAR struct pic32mx7mmb_dev_s *)dev;
/* CS high de-selects */
if (priv->selected)
{
pic32mx_gpiowrite(GPIO_LCD_CS, true);
priv->selected = false; /* LCD not selected */
priv->reading = false; /* No read sequence in progress */
}
}
/**************************************************************************************
* Name: pic32mx_index
*
* Description:
* Set the index register
*
**************************************************************************************/
static void pic32mx_index(FAR struct mio283qt2_lcd_s *dev, uint8_t index)
{
FAR struct pic32mx7mmb_dev_s *priv = (FAR struct pic32mx7mmb_dev_s *)dev;
/* Make sure that the PMP is not busy from the last transaction. Read data is not
* available until the busy bit becomes zero.
*/
pic32mx_busywait();
/* Write the 8-bit command (on the 16-bit data bus) */
pic32mx_command(priv);
putreg16((uint16_t)index, PIC32MX_PMP_DIN);
}
/**************************************************************************************
* Name: pic32mx_read
*
* Description:
* Read LCD data (GRAM data or register contents)
*
**************************************************************************************/
#ifndef CONFIG_MIO283QT2_WRONLY
static uint16_t pic32mx_read(FAR struct mio283qt2_lcd_s *dev)
{
FAR struct pic32mx7mmb_dev_s *priv = (FAR struct pic32mx7mmb_dev_s *)dev;
uint16_t data;
/* Make sure that the PMP is not busy from the last transaction. Read data is not
* available until the busy bit becomes zero.
*/
pic32mx_busywait();
/* Read 16-bits of data */
pic32mx_data(priv);
data = getreg16(PIC32MX_PMP_DIN);
/* We need to discard the first 16-bits of data that we read and re-read inorder
* to get valid data (that is just the way that the PMP works).
*/
if (!priv->reading)
{
data = getreg16(PIC32MX_PMP_DIN);
}
return data;
}
#endif
/**************************************************************************************
* Name: pic32mx_write
*
* Description:
* Write LCD data (GRAM data or register contents)
*
**************************************************************************************/
static void pic32mx_write(FAR struct mio283qt2_lcd_s *dev, uint16_t data)
{
FAR struct pic32mx7mmb_dev_s *priv = (FAR struct pic32mx7mmb_dev_s *)dev;
/* Make sure that the PMP is not busy from the last transaction */
pic32mx_busywait();
/* Write 16-bits of data */
pic32mx_data(priv);
putreg16(data, PIC32MX_PMP_DIN);
/* We are not in a write sequence */
priv->reading = false;
}
/**************************************************************************************
* Name: pic32mx_write
*
* Description:
* Write LCD data (GRAM data or register contents)
*
**************************************************************************************/
static void pic32mx_backlight(FAR struct mio283qt2_lcd_s *dev, int power)
{
/* For now, we just control the backlight as a discrete. Pulse width modulation
* would be required to vary the backlight level. A low value turns the backlight
* off.
*/
pic32mx_gpiowrite(GPIO_LCD_BLED, power > 0);
}
/**************************************************************************************
* Public Functions
**************************************************************************************/
/**************************************************************************************
* Name: up_lcdinitialize
*
* 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 up_lcdinitialize(void)
{
uint32_t regval;
/* Only initialize the driver once. NOTE: The LCD GPIOs were already configured
* by pic32mx_lcdinitialize.
*/
if (!g_pic32mx7mmb_lcd.drvr)
{
lcdvdbg("Initializing\n");
/* Hold the LCD in reset (active low) */
pic32mx_gpiowrite(GPIO_LCD_RST, false);
/* Configure PMP to support the LCD */
putreg32(0, PIC32MX_PMP_MODE);
putreg32(0, PIC32MX_PMP_AEN);
putreg32(0, PIC32MX_PMP_CON);
/* Set LCD timing values, PMP master mode 2, 16-bit mode, no address
* increment, and no interrupts.
*/
regval = (PMP_MODE_WAITE_RD(0) | PMP_MODE_WAITM(3) | PMP_MODE_WAITB_1TPB |
PMP_MODE_MODE_MODE2 | PMP_MODE_MODE16 | PMP_MODE_INCM_NONE |
PMP_MODE_IRQM_NONE);
putreg32(regval, PIC32MX_PMP_MODE);
/* Enable the PMP for reading and writing */
regval = (PMP_CON_CSF_ADDR1415 | PMP_CON_PTRDEN | PMP_CON_PTWREN |
PMP_CON_ADRMUX_NONE | PMP_CON_ON);
putreg32(regval, PIC32MX_PMP_CON);
/* Bring the LCD out of reset */
up_mdelay(5);
pic32mx_gpiowrite(GPIO_LCD_RST, true);
/* Configure and enable the LCD */
up_mdelay(50);
g_pic32mx7mmb_lcd.drvr = mio283qt2_lcdinitialize(&g_pic32mx7mmb_lcd.dev);
if (!g_pic32mx7mmb_lcd.drvr)
{
lcddbg("ERROR: mio283qt2_lcdinitialize failed\n");
return -ENODEV;
}
}
/* Clear the display (setting it to the color 0=black) */
#if 0 /* Already done in the driver */
mio283qt2_clear(g_pic32mx7mmb_lcd.drvr, 0);
#endif
/* Turn the display off */
g_pic32mx7mmb_lcd.drvr->setpower(g_pic32mx7mmb_lcd.drvr, 0);
return OK;
}
/**************************************************************************************
* Name: up_lcdgetdev
*
* 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 *up_lcdgetdev(int lcddev)
{
DEBUGASSERT(lcddev == 0);
return g_pic32mx7mmb_lcd.drvr;
}
/**************************************************************************************
* Name: up_lcduninitialize
*
* Description:
* Unitialize the LCD support
*
**************************************************************************************/
void up_lcduninitialize(void)
{
/* Turn the display off */
g_pic32mx7mmb_lcd.drvr->setpower(g_pic32mx7mmb_lcd.drvr, 0);
}
#endif /* CONFIG_LCD_MIO283QT2 */
/****************************************************************************
* Name: pic32mx_lcdinitialize
*
* Description:
* Initialize the LCD. This function should be called early in the boot
* sequendce -- Even if the LCD is not enabled. In that case we should
* at a minimum at least disable the LCD backlight.
*
****************************************************************************/
void pic32mx_lcdinitialize(void)
{
/* Configure all LCD discrete controls. LCD will be left in this state:
* 1. Held in reset,
* 2. Not selected,
* 3. Backlight off,
* 4. Command selected.
*/
#ifdef CONFIG_LCD_MIO283QT2
pic32mx_configgpio(GPIO_LCD_RST);
pic32mx_configgpio(GPIO_LCD_CS);
pic32mx_configgpio(GPIO_LCD_BLED);
pic32mx_configgpio(GPIO_LCD_RS);
#else
/* Just configure the backlight control as an output and turn off the
* backlight for now.
*/
pic32mx_configgpio(GPIO_LCD_BLED);
#endif
}
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