driver: ILI9340 LCD display driver

Minimal driver for ILI9340 LCD display driver including support
for adafruit 2.2" LCD display (1480)

Signed-off-by: Jan Van Winkel <[email protected]>

drivers/CMakeLists.txt

@@ -1,13 +1,13 @@
 add_definitions(-D__ZEPHYR_SUPERVISOR__)
 
 add_subdirectory(console)
-add_subdirectory(display)
 add_subdirectory(interrupt_controller)
 
 add_subdirectory_if_kconfig(adc)
 add_subdirectory_if_kconfig(clock_control)
 add_subdirectory_if_kconfig(counter)
 add_subdirectory_if_kconfig(crypto)
+add_subdirectory_if_kconfig(display)
 add_subdirectory_if_kconfig(dma)
 add_subdirectory_if_kconfig(flash)
 add_subdirectory_if_kconfig(gpio)

drivers/display/CMakeLists.txt

@@ -2,3 +2,7 @@ zephyr_sources_ifdef(CONFIG_MICROBIT_DISPLAY
 	mb_display.c
 	mb_font.c
 )
+zephyr_sources_ifdef(CONFIG_ILI9340 display_ili9340.c)
+zephyr_sources_ifdef(CONFIG_ILI9340_LCD_ADAFRUIT_1480
+	display_ili9340_adafruit_1480.c
+)

drivers/display/Kconfig

@@ -6,34 +6,17 @@
 # SPDX-License-Identifier: Apache-2.0
 #
 
-config MICROBIT_DISPLAY
-	bool "BBC micro:bit 5x5 LED Display support"
-	depends on BOARD_BBC_MICROBIT
-	depends on PRINTK
-	depends on GPIO
+menuconfig DISPLAY
+	bool
+	prompt "Display Drivers"
+	default n
 	help
-	  Enable this to be able to display images and text on the 5x5
-	  LED matrix display on the BBC micro:bit.
+	  Enable display drivers
 
-if MICROBIT_DISPLAY
+if DISPLAY
 
-config MICROBIT_DISPLAY_PIN_GRANULARITY
-	bool "Access the GPIO on a per-pin instead of per-port basis"
-	help
-	  By default, the micro:bit display driver will update the GPIO
-	  pins of the display (pins 4 through 15) by accessing the entire
-	  GPIO port. This is done for efficiency, however it may interfere
-	  with other peripherals connected to the same GPIO port. Select
-	  this option if other peripherals are connected to the same GPIO
-	  port.
+source "drivers/display/Kconfig.microbit"
 
-config MICROBIT_DISPLAY_STR_MAX
-	int "Maximum length of strings that can be shown on the display"
-	range 3 255
-	default 40
-	help
-	  This value specifies the maximum length of strings that can
-	  be displayed using the mb_display_string() and mb_display_print()
-	  APIs.
+source "drivers/display/Kconfig.ili9340"
 
-endif # MICROBIT_DISPLAY
+endif # DISPLAY

drivers/display/Kconfig.ili9340

@@ -0,0 +1,114 @@
+# Kconfig - ILI9340 display driver configuration options
+
+#
+# Copyright (c) 2017 dXplore
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+menuconfig ILI9340
+	bool "ILI9340 display driver"
+	depends on SPI
+	default n
+	help
+	Enable driver for ILI9340 display driver.
+
+if ILI9340
+
+config ILI9340_DEV_NAME
+	string "ILI9340 device name"
+	default "ILI9340"
+
+config ILI9340_SPI_DEV_NAME
+	string "SPI master where ILI9340 is connected"
+	default "SPI_0"
+	help
+	Specify the device name of the SPI master device to which ILI9340 is
+	connected.
+
+config ILI9340_SPI_SLAVE_NUMBER
+	int "SPI Slave number where ILI9340 is connected"
+	default 0
+	help
+	The number of the slave on the host controller to which ILI9340 is
+	connected.
+
+config ILI9340_SPI_FREQ
+	int "SPI Frequency"
+	default 15151515
+	help
+	Frequency to be used to communicate with the ILI9340.
+
+config SYS_LOG_ILI9340_LEVEL
+	int "ILI9340 Sys Log level"
+	depends on SYS_LOG
+	default 0
+	range 0 4
+	help
+	Sets log level for ILI9340 display driver.
+	Levels are:
+	- 0 OFF: do not write
+	- 1 ERROR: only write SYS_LOG_ERR
+	- 2 WARNING: write SYS_LOG_WRN in addition to previous level
+	- 3 INFO: write SYS_LOG_INF in addition to previous levels
+	- 4 DEBUG: write SYS_LOG_DBG in addition to previous levels
+
+config ILI9340_RESET_GPIO_PORT_NAME
+	string "Reset GPIO controller port name"
+	default "GPIO_0"
+	help
+	GPIO controller where the interrupt pin is attached to.
+
+config ILI9340_RESET_PIN
+	int "ILI9340 Reset pin"
+	default 0
+	help
+	ILI9340 reset pin.
+
+config ILI9340_CMD_DATA_GPIO_PORT_NAME
+	string "Command/Data GPIO controller port name"
+	default "GPIO_0"
+	help
+	GPIO controller where the command/data pin is attached to.
+
+config ILI9340_CMD_DATA_PIN
+	int "ILI9340 command/data pin"
+	default 1
+	help
+	ILI9340 command data pin.
+
+config ILI9340_GPIO_CS
+	bool "Use GPIO pin for chip select"
+	default n
+	help
+	Use GPIO pin for chips select.
+
+if ILI9340_GPIO_CS
+
+config ILI9340_CS_GPIO_PORT_NAME
+	string "Chip select GPIO controller port name"
+	default "GPIO_0"
+	help
+	GPIO controller where the chip select pin is attached to.
+
+config ILI9340_CS_GPIO_PIN
+	int "ILI9340 GPIO chip select"
+	default 1
+	help
+	ILI9340 GPIO chip select pin.
+
+endif #ILI9340_GPIO_CS
+
+choice
+	prompt "LCD"
+	default ILI9340_LCD_ADAFRUIT_1480
+	help
+	Specify the type of LCD connected to the ILI9340 display controller.
+
+config ILI9340_LCD_ADAFRUIT_1480
+	bool
+	prompt "Adafruit 2.2\" TFT 1480"
+
+endchoice
+
+endif #ILI9340

drivers/display/Kconfig.microbit

@@ -0,0 +1,39 @@
+# Kconfig - Microbit display driver configuration options
+
+#
+# Copyright (c) 2017 dXplore
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+config MICROBIT_DISPLAY
+	bool "BBC micro:bit 5x5 LED Display support"
+	depends on BOARD_BBC_MICROBIT
+	depends on PRINTK
+	depends on GPIO
+	help
+	  Enable this to be able to display images and text on the 5x5
+	  LED matrix display on the BBC micro:bit.
+
+if MICROBIT_DISPLAY
+
+config MICROBIT_DISPLAY_PIN_GRANULARITY
+	bool "Access the GPIO on a per-pin instead of per-port basis"
+	help
+	  By default, the micro:bit display driver will update the GPIO
+	  pins of the display (pins 4 through 15) by accessing the entire
+	  GPIO port. This is done for efficiency, however it may interfere
+	  with other peripherals connected to the same GPIO port. Select
+	  this option if other peripherals are connected to the same GPIO
+	  port.
+
+config MICROBIT_DISPLAY_STR_MAX
+	int "Maximum length of strings that can be shown on the display"
+	range 3 255
+	default 40
+	help
+	  This value specifies the maximum length of strings that can
+	  be displayed using the mb_display_string() and mb_display_print()
+	  APIs.
+
+endif # MICROBIT_DISPLAY