# # For a description of the syntax of this configuration file, # see the file kconfig-language.txt in the NuttX tools repository. # menu "LCD Driver Support" menuconfig LCD bool "Graphic LCD Driver Support" default n select NX_LCDDRIVER if NX ---help--- Drivers for parallel and serial LCD and OLED type devices. These drivers support interfaces as defined in include/nuttx/lcd/lcd.h This selection is necessary to enable support for LCD drivers in drivers/lcd as well as for board-specific LCD drivers in the configs/ subdirectories. if LCD comment "Common Graphic LCD Settings" config LCD_CONSOLE bool "LCD console output" default n ---help--- It is possible to use an SLCD to provide console output. This option enables that possibility. At present, only one architecture supports this option (M16C). However, this feature could be provided by other architectures in the future. config LCD_NOGETRUN bool "Write-only LCD" default n ---help--- Many LCD hardware interfaces provide only minimal graphics capability. In particulary, many simple LCD interfaces are write only. That is we, can write graphics data to the LCD device memory, but we cannot read it back. If the LCD hardware does not support reading the graphics memory, then this option should be defined so that the NX layer can taking alternative measures when the LCD is not readable. For example, if the LCD is not readable, then NX will not attempt to support transparency. See also NX_WRITEONLY in the graphics support menu. config LCD_MAXCONTRAST int "LCD maximum contrast" default 31 if AQM_1248A default 63 if NOKIA6100_S1D15G10 || LCD_SHARP_MEMLCD default 127 if NOKIA6100_PCF8833 default 255 if LCD_P14201 || LCD_LCD1602 default 63 range 1 255 ---help--- must be 63 with the Epson controller and 127 with the Phillips controller. config LCD_MAXPOWER int "LCD maximum power" default 255 if LCD_LCD1602 default 1 range 1 255 ---help--- Maximum value of LCD power setting. This normally equates to brightness: The brighter the screen, the hight the power usage. On LCDs that have a backlight, this value corresponds directly to that backlight setting. Board-specific logic may place restrictions on this value. comment "Graphic LCD Devices" config LCD_P14201 bool "Rit P1402 series display" default n ---help--- 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. if LCD_P14201 config P14201_NINTERFACES int "Number of physical P14201 devices" default 1 range 1 1 ---help--- Specifies the number of physical P14201 devices that will be supported. config P14201_SPIMODE int "SPI mode" default 2 range 0 3 ---help--- Controls the SPI mode config P14201_FREQUENCY int "SPI frequency" default 1000000 ---help--- Define to use a different bus frequency,FIXME DEFAULT VALUE OK? config P14201_FRAMEBUFFER bool "Enable P14201 GDDRAM cache" default y ---help--- If defined, accesses will be performed using an in-memory copy of the OLEDs GDDRAM. This cost of this buffer is 128 * 96 / 2 = 6Kb. If this is defined, then the driver will be fully functional. If not, then it will have the following limitations: Reading graphics memory cannot be supported, and All pixel writes must be aligned to byte boundaries. The latter limitation effectively reduces the 128x96 disply to 64x96. endif config LCD_NOKIA6100 bool "Nokia 6100 display support" default n ---help--- 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). if LCD_NOKIA6100 config NOKIA6100_NINTERFACES int "Number of physical NOKIA6100 devices" default 1 range 1 1 ---help--- Specifies the number of physical Nokia 6100 devices that will be supported. choice NOKIA6100_CONTROLLER prompt "Controller Setup" default NOKIA6100_S1D15G10 config NOKIA6100_S1D15G10 bool "S1D15G10 controller" ---help--- Selects the Epson S1D15G10 display controller config NOKIA6100_PCF8833 bool "PCF8833 controller" ---help--- Selects the Phillips PCF8833 display controller endchoice config NOKIA6100_SPIMODE int "SPI mode" default 0 range 0 3 ---help--- Controls the SPI mode config NOKIA6100_FREQUENCY int "SPI frequency" default 1000000 ---help--- Define to use a different bus frequency config NOKIA6100_BPP int "Display bits per pixel" default 8 ---help--- Device supports 8, 12, and 16 bits per pixel. config NOKIA6100_BLINIT int "Back light initial" default 40 ---help--- Initial backlight setting config NOKIA6100_INVERT int "Display inversion" default 1 range 0 1 ---help--- Display inversion, 0 or 1, Default: 1 config NOKIA6100_MY int "Display row direction" default 0 range 0 1 ---help--- Display row direction, 0 or 1, Default: 0 config NOKIA6100_MX int "Display column direction" default 1 range 0 1 ---help--- Display column direction, 0 or 1, Default: 1 config NOKIA6100_V int "Display address direction" default 0 range 0 1 ---help--- Display address direction, 0 or 1, Default: 0 config NOKIA6100_ML int "Display scan direction" default 0 range 0 1 ---help--- Display scan direction, 0 or 1, Default: 0 config NOKIA6100_RGBORD int "Display RGB order" default 0 range 0 1 ---help--- Display RGB order, 0 or 1, Default: 0 Required LCD driver settings: endif config LCD_MIO283QT2 bool "MIO283QT-2 TFT LCD Display Module" default n ---help--- OLED Display Module, MIO283QT-2, Multi-Inno Technology, Co. based on the Himax HX8347-D LCD controller. config LCD_MIO283QT9A bool "MIO283QT-9A TFT LCD Display Module" default n ---help--- Selects the driver for the MI0283QT-9A LCD from Multi-Inno Technology Co., Ltd. This LCD is based on the Ilitek ILI9341 LCD controller. config LCD_UG9664HSWAG01 bool "UG-9664HSWAG01 OLED Display Module" default n depends on SPI ---help--- OLED Display Module, UG-9664HSWAG01, Univision Technology Inc. Used with the LPCXpresso and Embedded Artists base board. Required LCD driver settings: LCD_MAXCONTRAST should be 255, but any value >0 and <=255 will be accepted. LCD_MAXPOWER should be 1: 0=off, 1=on Required SPI driver settings: SPI_CMDDATA - Include support for cmd/data selection. if LCD_UG9664HSWAG01 config UG9664HSWAG01_SPIMODE int "UG-9664HSWAG01 SPI Mode" default 0 range 0 3 ---help--- Controls the SPI mode config UG9664HSWAG01_FREQUENCY int "UG-9664HSWAG01 SPI Frequency" default 3500000 ---help--- Define to use a different bus frequency config UG9664HSWAG01_NINTERFACES int "Number of UG-9664HSWAG01 Devices" default 1 ---help--- Specifies the number of physical UG-9664HSWAG01 devices that will be supported. NOTE: At present, this must be undefined or defined to be 1. config UG9664HSWAG01_POWER bool "Power control" default n ---help--- If the hardware supports a controllable OLED a power supply, this configuration should be defined. In this case the system must provide an interface ug_power(). endif config LCD_SH1106_OLED_132 bool "Generic 0.96'' OLED Display Module (SH1106/SSD1306)" default n select LCD_SSD1306 ---help--- 0.96'' OLED Display Module, featuring an SH1106, typically advertised as SSD1306. Mostly similar to "UG2864HSWEG01" although it uses the full 132x28 pixels. Required LCD driver settings: LCD_MAXCONTRAST should be 255, but any value >0 and <=255 will be accepted. LCD_MAXPOWER should be 1: 0=off, 1=on config LCD_UG2864HSWEG01 bool "UG-2864HSWEG01 OLED Display Module (SSD1306)" default n select LCD_SSD1306 ---help--- OLED Display Module, UG-2864HSWEG01, Univision Technology Inc based on the Solomon Tech SSD1306 LCD controller. Required LCD driver settings: LCD_MAXCONTRAST should be 255, but any value >0 and <=255 will be accepted. LCD_MAXPOWER should be 1: 0=off, 1=on Required SPI driver settings: SPI_CMDDATA - Include support for cmd/data selection. config LCD_UG2832HSWEG04 bool "UG-2832HSWEG04 OLED Display Module (SSD1306)" default n depends on !LCD_UG2864HSWEG01 select LCD_SSD1306 ---help--- OLED Display Module, UG-UG2832HSWEG04, Univision Technology Inc based on the Solomon Tech SSD1306 LCD controller. Used with the Atmel SAM4L Xplained Pro board on the OLED1 module. Required LCD driver settings: LCD_MAXCONTRAST should be 255, but any value >0 and <=255 will be accepted. LCD_MAXPOWER should be 1: 0=off, 1=on Required SPI driver settings: SPI_CMDDATA - Include support for cmd/data selection. config LCD_SSD1306 bool if LCD_SSD1306 choice prompt "SSD1306 Interface" default LCD_SSD1306_SPI config LCD_SSD1306_SPI bool "SSD1306 on SPI Interface" select SPI ---help--- Enables support for the SPI interface. config LCD_SSD1306_I2C bool "SSD1306 on I2C Interface" select I2C ---help--- Enables support for the I2C interface endchoice # SSD1306 Interface endif # LCD_SSD1306 if LCD_SSD1306_SPI config SSD1306_SPIMODE int "SSD1306 SPI Mode" default 0 range 0 3 ---help--- Selects the SPI mode used with the SSD1306 device config SSD1306_FREQUENCY int "SSD1306 SPI Frequency" default 3500000 ---help--- Selects the SPI bus frequency used with the SSD1306 device #config SSD1306_NINTERFACES # int "Number of SSD1306 Devices" # default 1 # ---help--- # Specifies the number of physical SSD1306 devices that will be # supported. NOTE: At present, this must be undefined or defined to # be 1. endif # LCD_SSD1306_SPI if LCD_SSD1306_I2C config SSD1306_I2CADDR int "SSD1306 I2C Address" default 120 ---help--- I2C Address of SSD1306 config SSD1306_I2CFREQ int "SSD1306 I2C Frequency" default 400000 ---help--- I2C Frequency to communicate with SSD1306 endif # LCD_SSD1306_I2C config LCD_SSD1351 bool "SSD1351 OLED Display Module" default n ---help--- OLED Display Module, SSD1351, Solomon Systech. if LCD_SSD1351 choice prompt "Interface" default SSD1351_SPI4WIRE config SSD1351_PARALLEL8BIT bool "8-bit Parallel Interface" ---help--- Enables support for the 8-bit parallel interface. config SSD1351_SPI3WIRE bool "3-wire SPI Interface" select SPI ---help--- Enables support for the 3-wire SPI interface. config SSD1351_SPI4WIRE bool "4-wire SPI Interface" select SPI select SPI_CMDDATA ---help--- Enables support for the 4-wire SPI interface. endchoice if SSD1351_SPI3WIRE || SSD1351_SPI4WIRE config SSD1351_SPIMODE int "SPI Mode" default 0 range 0 3 ---help--- Specifies the SPI mode. config SSD1351_SPIFREQ int "SPI Frequency" default 1000000 ---help--- Specifies the SPI frequency. endif config SSD1351_NINTERFACES int "Number of SSD1351 Devices" default 1 range 1 1 ---help--- Specifies the number of physical SSD1351 devices that will be supported. config SSD1351_XRES int "X Resolution" default 128 range 1 128 ---help--- Specifies the X resolution of the display. config SSD1351_YRES int "Y Resolution" default 128 range 1 128 ---help--- Specifies the Y resolution of the display. config SSD1351_MIRRORX bool "Mirror X" default n ---help--- Mirrors the display along the X axis. config SSD1351_MIRRORY bool "Mirror Y" default n ---help--- Mirrors the display along the Y axis. config SSD1351_INVERT bool "Invert Display" default n ---help--- Inverts the display. config SSD1351_VDDEXT bool "External VDD" default n ---help--- Specifies that VDD is external. config SSD1351_TRST int "Reset Period" default 5 range 5 31 ---help--- Specifies the reset period in DCLKs. config SSD1351_TPRECHG1 int "First Pre-charge Period" default 8 range 3 15 ---help--- Specifies the first pre-charge period in DCLKs. config SSD1351_PERFENHANCE bool "Enhance Display Performance" default n ---help--- Enhances the display performance. config SSD1351_CLKDIV int "Clock Divider" default 0 range 0 10 ---help--- Specifies the clock divider. config SSD1351_OSCFREQ int "Oscillator Frequency" default 15 range 0 15 ---help--- Specifies the oscillator frequency. config SSD1351_TPRECHG2 int "Second Pre-charge Period" default 8 range 1 15 ---help--- Specifies the second pre-charge period in DCLKs. config SSD1351_VPRECHG int "Voltage Pre-charge Level" default 50 range 20 60 ---help--- Specifies the pre-charge voltage level as a percentage of VCC. config SSD1351_VCOMH int "COM Deselect Voltage Level" default 82 range 72 86 ---help--- Specifies the COM deselect voltage level as a percentage of VCC. config SSD1351_CONTRASTA int "Color A Contrast" default 138 range 0 255 ---help--- Specifies the contrast of color A. config SSD1351_CONTRASTB int "Color B Contrast" default 81 range 0 255 ---help--- Specifies the contrast of color B. config SSD1351_CONTRASTC int "Color C Contrast" default 138 range 0 255 ---help--- Specifies the contrast of color C. config SSD1351_MSTRCONTRAST int "Master Contrast Ratio" default 16 range 1 16 ---help--- Specifies the master contrast ratio in sixteenths. endif config LCD_ST7565 bool "ST7565 LCD Display Module" default n ---help--- LCD Display Module, ST7565, Univision Technology Inc. Required LCD driver settings: LCD_MAXCONTRAST should be 255, but any value >0 and <=255 will be accepted. if LCD_ST7565 choice prompt "LCD Display Module initialization sequence" default NHD_C12864KGZ config NHD_C12864KGZ bool "like NHD C12864KGZ" config ERC_12864_3 bool "like ERC12864-3" config AQM_1248A bool "like AQM1248A" endchoice config ST7565_NINTERFACES int "Number of ST7565 Devices" default 1 ---help--- Specifies the number of physical ST7565 devices that will be supported. NOTE: At present, this must be undefined or defined to be 1. config ST7565_XRES int "ST7565 X Resolution" default 128 ---help--- Specifies the X resolution of the LCD. config ST7565_YRES int "ST7565 Y Resolution" default 48 if AQM_1248A default 64 ---help--- Specifies the Y resolution of the LCD. config ST7565_MIRROR_X bool "ST7565 apply mirror on X" default n ---help--- Mirror X on LCD. config ST7565_MIRROR_Y bool "ST7565 apply mirror on Y" default y if AQM_1248A default n ---help--- Mirror Y on LCD. config ST7565_INVERSE_VIDEO bool "ST7565 Inverse video" default n ---help--- Inverse video on LCD. endif # LCD_ST7565 config LCD_ST7567 bool "ST7567 LCD Display Module" default n ---help--- LCD Display Module, ST7567, Univision Technology Inc. Used with the LPCXpresso and Embedded Artists base board. Required LCD driver settings: LCD_MAXCONTRAST should be 255, but any value >0 and <=255 will be accepted. LCD_MAXPOWER should be 1: 0=off, 1=on Required SPI driver settings: SPI_CMDDATA - Include support for cmd/data selection. if LCD_ST7567 config ST7567_SPIMODE int "ST7567 SPI Mode" default 0 range 0 3 ---help--- Controls the SPI mode config ST7567_FREQUENCY int "ST7567 SPI Frequency" default 3500000 ---help--- Define to use a different bus frequency config ST7567_NINTERFACES int "Number of ST7567 Devices" default 1 ---help--- Specifies the number of physical ST7567 devices that will be supported. NOTE: At present, this must be undefined or defined to be 1. config ST7567_POWER bool "Power control" default n ---help--- If the hardware supports a controllable LCD a power supply, this configuration should be defined. In this case the system must provide an interface ug_power(). config ST7567_XRES int "ST7567 X Resolution" default 128 ---help--- Specifies the X resolution of the LCD. config ST7567_YRES int "ST7567 Y Resolution" default 64 ---help--- Specifies the Y resolution of the LCD. endif # LCD_ST7567 config LCD_UG2864AMBAG01 bool "UG-2864AMBAG01 OLED Display Module" default n ---help--- OLED Display Module, UG-2864AMBAG01, Univision Technology Inc. Required LCD driver settings: LCD_MAXCONTRAST should be 255, but any value >0 and <=255 will be accepted. LCD_MAXPOWER should be 1: 0=off, 1=on Required SPI driver settings: SPI_CMDDATA - Include support for cmd/data selection. if LCD_UG2864AMBAG01 config UG2864AMBAG01_SPIMODE int "UG-2864AMBAG01 SPI Mode" default 3 range 0 3 ---help--- Controls the SPI mode config UG2864AMBAG01_FREQUENCY int "UG-2864AMBAG01 SPI Frequency" default 3500000 ---help--- Define to use a different bus frequency config UG2864AMBAG01_NINTERFACES int "Number of UG-2864AMBAG01 Devices" default 1 ---help--- Specifies the number of physical UG-9664HSWAG01 devices that will be supported. NOTE: At present, this must be undefined or defined to be 1. endif config LCD_SSD1289 bool "LCD Based on SSD1289 Controller" default n ---help--- Enables generic support for any LCD based on the Solomon Systech, Ltd, SSD1289 Controller. Use of this driver will usually require so detailed customization of the LCD initialization code as necessary for the specific LCD driven by the SSD1289 controller. if LCD_SSD1289 choice prompt "SSD1289 Initialization Profile" default SSD1289_PROFILE1 config SSD1289_PROFILE1 bool "Profile 1" config SSD1289_PROFILE2 bool "Profile 2" config SSD1289_PROFILE3 bool "Profile 3" endchoice endif config LCD_SHARP_MEMLCD bool "Sharp Memory LCD Suite" default n ---help--- memlcd.c. Driver for Sharp Memory LCD Suite. if LCD_SHARP_MEMLCD choice MEMLCD_MODEL prompt "Choose Model" default MEMLCD_LS013B7DH03 config MEMLCD_LS013B7DH01 bool "LS013B7DH01" ---help--- Selects the LS013B7DH01 model config MEMLCD_LS013B7DH03 bool "LS013B7DH03" ---help--- Selects the LS013B7DH03 model endchoice config MEMLCD_NINTERFACES int "Number of physical Memory LCD devices" default 1 range 1 1 ---help--- Specifies the number of physical Memory LCD devices that will be supported. config MEMLCD_EXTCOMIN_MODE_HW bool "Use hardware mode for EXTCOMIN" default n ---help--- If use hardware mode to toggle VCOM, we need to send specific command at a constant frequency to trigger the LCD intenal hardware logic. While use software mode, we set up a timer to toggle EXTCOMIN connected IO, basically, it is a hardware timer to ensure a constant frequency. config MEMLCD_SPI_FREQUENCY int "SPI frequency" default 3500000 ---help--- Define to use a different bus frequency, FIXME DEFAULT VALUE OK? endif choice prompt "LCD Orientation" default LCD_LANDSCAPE depends on LCD ---help--- Some LCD drivers may support displays in different orientations. If the LCD driver supports this capability, than these are configuration options to select that display orientation. config LCD_LANDSCAPE bool "Landscape orientation" ---help--- Define for "landscape" orientation support. Landscape mode refers one of two orientations where the display is wider than it is tall (LCD_RLANDSCAPE is the other). This is the default orientation. config LCD_PORTRAIT bool "Portrait orientation" ---help--- Define for "portrait" orientation support. Portrait mode refers one of two orientations where the display is taller than it is wide (LCD_RPORTAIT is the other). config LCD_RPORTRAIT bool "Reverse portrait display" ---help--- Define for "reverse portrait" orientation support. Reverse portrait mode refers one of two orientations where the display is taller than it is wide (LCD_PORTAIT is the other). config LCD_RLANDSCAPE bool "Reverse landscape orientation" ---help--- Define for "reverse landscape" orientation support. Reverse landscape mode refers one of two orientations where the display is wider than it is tall (LCD_LANDSCAPE is the other). endchoice config LCD_ILI9341 bool "ILI9341 LCD Single Chip Driver" default n ---help--- LCD Single Chip Driver, ILI9341, ILI Technology Corp. Used with the STM32F429i Discovery Board. Required LCD driver settings: LCD_MAXCONTRAST should be 255, but any value >0 and <=255 will be accepted. LCD_MAXPOWER should be 1: 0=off, 1=on config LCD_ILI9341_NINTERFACES int "Number of supported display driver" range 1 2 default 1 depends on LCD_ILI9341 ---help--- Define the number of supported displays driven by a ili9341 LCD Single Chip Driver. config LCD_ILI9341_IFACE0 bool "(1) LCD Display" depends on LCD_ILI9341_NINTERFACES = 1 || LCD_ILI9341_NINTERFACES = 2 ---help--- Configure first LCD Display. if LCD_ILI9341_IFACE0 choice prompt "LCD Orientation" default LCD_ILI9341_IFACE0_LANDSCAPE ---help--- Configure display orientation. config LCD_ILI9341_IFACE0_LANDSCAPE bool "Landscape orientation" ---help--- Define for "landscape" orientation support. config LCD_ILI9341_IFACE0_PORTRAIT bool "Portrait orientation" ---help--- Define for "portrait" orientation support. config LCD_ILI9341_IFACE0_RLANDSCAPE bool "Reverse landscape orientation" ---help--- Define for "reverse landscape" orientation support. config LCD_ILI9341_IFACE0_RPORTRAIT bool "Reverse portrait display" ---help--- Define for "reverse portrait" orientation support. endchoice choice prompt "Color format" default LCD_ILI9341_IFACE0_RGB565 ---help--- LCD color format. config LCD_ILI9341_IFACE0_RGB565 bool "16 bpp RGB565 color format" ---help--- 16 bpp RGB565 color format endchoice endif config LCD_ILI9341_IFACE1 bool "(2) LCD Display" depends on LCD_ILI9341_NINTERFACES = 2 ---help--- Configure second LCD Display. if LCD_ILI9341_IFACE1 choice prompt "LCD Orientation" default LCD_ILI9341_IFACE1_LANDSCAPE ---help--- Configure display orientation. config LCD_ILI9341_IFACE1_LANDSCAPE bool "Landscape orientation" ---help--- Define for "landscape" orientation support. config LCD_ILI9341_IFACE1_PORTRAIT bool "Portrait orientation" ---help--- Define for "portrait" orientation support. config LCD_ILI9341_IFACE1_RLANDSCAPE bool "Reverse landscape orientation" ---help--- Define for "reverse landscape" orientation support. config LCD_ILI9341_IFACE1_RPORTRAIT bool "Reverse portrait display" ---help--- Define for "reverse portrait" orientation support. endchoice choice prompt "Color format" default LCD_ILI9341_IFACE1_RGB565 ---help--- LCD color format. config LCD_ILI9341_IFACE1_RGB565 bool "16 bpp RGB565 color format" ---help--- 16 bpp RGB565 color format endchoice endif config LCD_RA8875 bool "RA8875 LCD Display Controller" default n ---help--- LCD controller driver for RA8875 by RAiO Technologies Inc. if LCD_RA8875 choice prompt "MCU Interface width" default LCD_RA8875_8BIT ---help--- Bit-width of MCU interface (8 or 16) config LCD_RA8875_8BIT bool "8 bit" config LCD_RA8875_16BIT bool "16 bit" endchoice # MCU Interface width choice prompt "Colors" default LCD_RA8875_65K ---help--- Number of colors/color depth config LCD_RA8875_256 bool "256 / 8 bit" config LCD_RA8875_65K bool "65k / 16 bit" endchoice # Colors config LCD_RA8875_EXTENDED bool "Extended drawing interfaces" default n depends on BUILD_FLAT ---help--- Build in some non-standard, custom drawing interfaces for the RA8875 including the following: ra8875_drawrectangle(), ra8875_drawline(), ra8875_drawtriangle(), and ra8875_drawcircle(). NOTE that these will not be accessible by applications in protected or kernel build configurations. NOTE: The non-standard ra8875_clear(), ra8875_drawrectangle(), ra8875_drawline() interfaces are always built and available for use because within the OS because these are used internally by the driver anyway. endif # LCD_RA8875 endif # LCD menuconfig SLCD bool "Alphanumeric/Segment LCD Devices" default n ---help--- Drivers for Alphanumeric ans Segment LCDs (SLCDs). These drivers support interfaces as defined in include/nuttx/lcd/slcd_ioctl.h amd slcd_codec.h This selection is necessary to enable support for SLCD drivers in drivers/lcd as well as for board-specific LCD drivers in the configs/ subdirectories. if SLCD config LCD_LCD1602 bool "LCD 1602" default n ---help--- Enable support for LCD1602 devices. LCD1602 is based on the Hitachi HD44780U LCD controller. See also include/nuttx/lcd/hd4478ou.h. NOTE: There is no common implementation of the LCD1602 driver. Rather, there are board-by-board implementations. See, for example, configs/pcblogic-pic32mx/src/up_lcd1602.c. config LCD_BACKPACK bool "PCF8574 LCD Backpack" default n depends on I2C select LIB_SLCDCODEC ---help--- Enable support for PCF8574 LCD Backpack driver. This driver supports an interface board that is based on the PCF8574 io expander and supports the HD44780-based (or compatible) LCD modules. There are a myriad of different vendors of such, but they are principally the same, save wiring and minor features like jumpers for I2C addresses. This driver supports known and unknown variants. See pcf8574_lcd_backpack_readme.txt endif # SLCD endmenu # LCD Driver Support