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SAM4E-EK: Add ILI9341-based LCD driver
This commit is contained in:
Gregory Nutt
@@ -65,7 +65,19 @@ endchoice # AT25 serial FLASH configuration
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if LCD
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choice
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prompt "ILI9325-based LCD Color Configuration"
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prompt "LCD Type"
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default SAM4EEK_LCD_ILI9341
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config SAM4EEK_LCD_ILI9325
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bool "ILI9325 LCD controller"
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config SAM4EEK_LCD_ILI9341
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bool "ILI9341 LCD controller"
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endchoice # LCD Type
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choice
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prompt "LCD Color Configuration"
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default SAM4EEK_LCD_RGB565
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config SAM4EEK_LCD_RGB565
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@@ -77,7 +89,7 @@ config SAM4EEK_LCD_RGB24
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config SAM4EEK_LCD_RGB32
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bool "RGB32"
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endchoice # ILI9325-based LCD Color Configuration
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endchoice # LCD Color Configuration
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config SAM4EEK_LCD_BGCOLOR
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hex "Initial background color"
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+38
-39
@@ -24,7 +24,7 @@ Contents
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- USB Full-Speed Device
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- HSMCI
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- Touchscreen
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- ILI9325-Based LCD
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- ILI9325/41-Based LCD
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- SAM4E-EK-specific Configuration Options
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- Configurations
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@@ -917,18 +917,16 @@ Touchscreen
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STATUS: Verified 2014-05-14
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ILI9325-Based LCD
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ILI9325/41-Based LCD
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=================
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The SAM4E-EK carries a TFT transmissive LCD module with touch panel,
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FTM280C34D. Its integrated driver IC is ILI9325. The LCD display area is
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2.8 inches diagonally measured, with a native resolution of 240 x 320
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FTM280C34D. Its integrated driver IC is either a ILI9325 ILI9342 (the
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original schematics said ILI9325, but I learned the hard way that I had
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an ILI9341-based LCD). The LCD display area is 2.8 inches diagonally
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measured, with a native resolution of 240 x 320
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dots.
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No driver has been developed for the SAM4E-EK LCD as of this writing.
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Some technical information follows might be useful to anyone who is
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inspired to develop that driver:
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Connectivity
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------------
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@@ -998,39 +996,34 @@ ILI9325-Based LCD
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brightness control) from a 32-level logarithmic scale. Four resistors
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R93/R94/R95/R96 are implemented for optional current limitation.
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Resources
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---------
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Configuration
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-------------
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If you want to implement LCD support, here are some references that may
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help you:
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This is the basic configuration that enables the ILI9341-based LCD.
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Of course additional settings would be necessary to enable the graphic
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capabilities to do anything with the LCD.
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1. Atmel Sample Code (ASF). There is no example for the SAM4E-EK, but
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there is for the SAM4S-EK. The LCD and its processor connectivity
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appear to be equivalent to the SAM4E-EK so this sample code should be
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a good place to begin. NOTE that the clock frequencies may be
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different and pin usage may be different. So it may be necessary to
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adjust the SAM configuration to use this example.
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System Type -> AT91SAM3/4 Configuration Options
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CONFIG_SAM34_SMC=y : SMC support
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2. There is an example of an LCD driver for the SAM3U at
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configs/sam4u-ek/src/up_lcd.c. That LCD driver is for an LCD with a
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different LCD controller but should provide the NuttX SAM framework
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for an LCD driver.
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Device Drivers -> LCD Driver Support
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CONFIG_LCD=y : Enable LCD support
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CONFIG_LCD_MAXCONTRAST=1 : Value should not matter
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CONFIG_LCD_MAXPOWER=64 : Must be > 16
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CONFIG_LCD_LANDSCAPE=y : Landscape orientation
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3. There are other LCD drivers for different MCUs that do support the
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ILI9325 LCD. Look at configs/shenzhou/src/up_ili93xx.c,
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configs/stm3220g-eval/src/up_lcd.c, and
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configs/stm3240g-eval/src/up_lcd.c. I believe that the Shenzhou
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driver is the most recent.
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Board Selection
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CONFIG_SAM4EEK_LCD_ILI9341=y : For the ILI9341-based LCD
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CONFIG_SAM4EEK_LCD_RGB565=y : Color resolution
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CONFIG_SAM4EEK_LCD_BGCOLOR=0x00 : Initial background color
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STATUS:
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2014-05-14: Fully implemented. There is still a bug in in the LCD
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communications. The LCD ID is read as 0x0000 instead of 0x9325.
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2014-8-19: Updated. The LCD ID is bad because the on-board LCD is
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*not* an ILI9325. It is an ILI9341. The ID lies in a different
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address and is 0x00009341. Need to write a new driver.
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2014-8-20: Updated. The ILI9341 LCD has some basic functionality.
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Certainly it can transfer and display data fine. But there are some
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issues with the geometry of data that appears on the LCD..
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The LCD backlight appears to be functional.
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The LCD backlight is functional.
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SAM4E-EK-specific Configuration Options
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=======================================
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@@ -1185,9 +1178,14 @@ SAM4E-EK-specific Configuration Options
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LCD Options. Other than the standard LCD configuration options
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(see configs/README.txt), the SAM4E-EK driver also supports:
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CONFIG_LCD_PORTRAIT - Present the display in the standard 240x320
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"Portrait" orientation. Default: The display is rotated to
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support a 320x240 "Landscape" orientation.
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CONFIG_LCD_LANDSCAPE - Define for 320x240 display "landscape"
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support. Default is this 320x240 "landscape" orientation
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CONFIG_LCD_RLANDSCAPE - Define for 320x240 display "reverse
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landscape" support.
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CONFIG_LCD_PORTRAIT - Define for 240x320 display "portrait"
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orientation support.
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CONFIG_LCD_RPORTRAIT - Define for 240x320 display "reverse
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portrait" orientation support.
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Configurations
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==============
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@@ -1425,6 +1423,7 @@ Configurations
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CONFIG_LCD_LANDSCAPE=y : Landscape orientation
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Board Selection
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CONFIG_SAM4EEK_LCD_ILI9341=y : For the ILI9341-based LCD
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CONFIG_SAM4EEK_LCD_RGB565=y : Color resolution
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CONFIG_SAM4EEK_LCD_BGCOLOR=0x00 : Initial background color
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@@ -1469,9 +1468,9 @@ Configurations
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2014-05-14: The touchscreen interface was successfully verified.
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2014-05-14: The LCD interface is fully implemented. However,
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there is still a bug in in the LCD communications. The
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LCD ID is read as 0x0000 instead of 0x9325.
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2014-08-20: The LCD interface is fully implemented and data appears
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to be transferred okay. However, there are errors in
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geometry that leave the LCD unusable still.
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The LCD backlight appears to be functional.
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@@ -55,7 +55,13 @@ CSRCS += sam_hsmci.c
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endif
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ifeq ($(CONFIG_LCD),y)
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ifeq ($(CONFIG_SAM4EEK_LCD_ILI9325),y)
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CSRCS += sam_ili9325.c
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else
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ifeq ($(CONFIG_SAM4EEK_LCD_ILI9341),y)
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CSRCS += sam_ili9341.c
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endif
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endif
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endif
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ifeq ($(CONFIG_INPUT_ADS7843E),y)
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