nuttx/drivers/lcd README
========================
This is the README.txt file for the drivers/lcd/ directory.
Contents
========
- LCD Header files
include/nuttx/lcd/lcd.h
struct lcd_dev_s
- Binding LCD Drivers
- Examples: /drivers/lcd/
- Examples: configs/
- graphics/
LCD Header files
================
include/nuttx/lcd/lcd.h
Structures and APIs needed to work with LCD drivers are provided in
this header file. This header file also depends on some of the same
definitions used for the frame buffer driver as privided in
include/nuttx/fb.h.
struct lcd_dev_s
Each LCD device driver must implement an instance of struct lcd_dev_s.
That structure defines a call table with the following methods:
- Get information about the LCD video controller configuration and the
configuration of each LCD color plane.
int (*getvideoinfo)(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo);
int (*getplaneinfo)(FAR struct lcd_dev_s *dev, unsigned int planeno,
FAR struct lcd_planeinfo_s *pinfo);
- The following are provided only if the video hardware supports RGB
color mapping:
int (*getcmap)(FAR struct lcd_dev_s *dev,
FAR struct fb_cmap_s *cmap);
int (*putcmap)(FAR struct lcd_dev_s *dev,
FAR const struct fb_cmap_s *cmap);
- The following are provided only if the video hardware supports a
hardware cursor:
int (*getcursor)(FAR struct lcd_dev_s *dev,
FAR struct fb_cursorattrib_s *attrib);
int (*setcursor)(FAR struct lcd_dev_s *dev,
FAR struct fb_setcursor_s *settings);
- Get the LCD panel power status (0: full off - CONFIG_LCD_MAXPOWER:
full on). On backlit LCDs, this setting may correspond to the
backlight setting.
int (*getpower)(struct lcd_dev_s *dev);
- Enable/disable LCD panel power (0: full off - CONFIG_LCD_MAXPOWER:
full on). On backlit LCDs, this setting may correspond to the
backlight setting.
int (*setpower)(struct lcd_dev_s *dev, int power);
- Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST) */
int (*getcontrast)(struct lcd_dev_s *dev);
- Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST)
int (*setcontrast)(struct lcd_dev_s *dev, unsigned int contrast);
Binding LCD Drivers
===================
LCD drivers are not normally directly accessed by user code, but are
usually bound to another, higher level device driver. In general, the
binding sequence is:
1. Get an instance of struct lcd_dev_s from the hardware-specific LCD
device driver, and
2. Provide that instance to the initialization method of the higher
level device driver.
Examples: /drivers/lcd/
=======================
Re-usable LCD drivers reside in the drivers/lcd directory:
mio283qt2.c. This is a driver for the MI0283QT-2 LCD from Multi-Inno
Technology Co., Ltd. This LCD is based on the Himax HX8347-D LCD
controller.
nokia6100.c. Supports the Nokia 6100 display with either the Philips
PCF883 or the Epson S1D15G10 display controller. This LCD is used
with the Olimex LPC1766-STK (but has not been fully integrated).
p14201.c. Driver for RiT P14201 series display with SD1329 IC
controller. This OLED is used with older versions of the
TI/Luminary LM3S8962 Evaluation Kit.
ssd12989.c. Generic LCD driver for LCDs based on the Solomon Systech
SSD1289 LCD controller. Think of this as a template for an LCD driver
that you will proably ahve to customize for any particular LCD
hardware. (see also configs/hymini-stm32v/src/ssd1289.c below).
ug-9664hswag01.c. OLED Display Module, UG-9664HSWAG01", Univision
Technology Inc. Used with the LPC Xpresso and Embedded Artists
base board.
Examples: configs/
==================
There are additional LCD drivers in the configs/<board>/src directory
that support additional LCDs. LCD drivers in the configuration directory
if they support some differ LCD interface (such as a parallel interface)
that makes then less re-usable:
configs/compal_e99/src/ssd1783.c
SSD1783
configs/hymini-stm32v/src/ssd1289.c. See also drivers/lcd/ssd1298.c
above.
SSD1289
configs/kwikstik-k40/src/up_lcd.c. Don't waste your time. This is
just a stub.
configs/olimex-lpc1766stk/src/up_lcd.c. This examples is the
bottom half for the SSD1289 driver at drivers/lcd/nokia6100.c.
This was never completedly debugged ... there are probably issues
with that nasty 9-bit SPI interfaces.
configs/sam3u-ek/src/up_lcd.c
The SAM3U-EK developement board features a TFT/Transmissive color
LCD module with touch-screen, FTM280C12D, with integrated driver IC
HX8346.
configs/skp16c26/src/up_lcd.c. Untested alphanumeric LCD driver.
configs/stm3210e-eval/src/up_lcd.c
This driver supports the following LCDs:
1. Ampire AM-240320LTNQW00H
2. Orise Tech SPFD5408B
3. RenesasSP R61580
configs/stm3220g-eval/src/up_lcd.c and configs/stm3240g-eval/src/up_lcd.c.
AM-240320L8TNQW00H (LCD_ILI9320 or LCD_ILI9321) and
AM-240320D5TOQW01H (LCD_ILI9325)
configs/stm32f4discovery/src/up_ssd1289.c. This examples is the
bottom half for the SSD1289 driver at drivers/lcd/ssd1289.c
graphics/
=========
See also the usage of the LCD driver in the graphics/ directory.
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