I'm flashing the image to a microSD card using Armbiam Imager doesn't boot: works OK:

my model without emmc (3 ram + 0 emmc). Could that be the reason? I apologize for the misinformation; I checked my board, and the revision number isn't listed there either.

Could you tell me where you found the revision number? I don't see anything written on my board.

no, it have secureboot, emcp 1,5gb instead 1 or 2gb ram, i tried to boot x96q lpddr3 + secure patch + orangepi zero3 1,5gb patch but at uboot it allway say 2gb ram 0g effective. uboot spl load 1,5gb ram correctly

Hi @Jean-Francois Lessard Thanks for sharing the new openvfd option for Armbian. I am using a Allwinner H618 Android 12 TV box that got FD6551 controller. I have verified the chip model by opening the box. The headers of respective version is also installed and I have double checked that. apt install -y linux-headers-edge-sunxi64 Reading package lists... Done Building dependency tree... Done Reading state information... Done linux-headers-edge-sunxi64 is already the newest version (25.11.2). From the Android dts file I can find the following. I have tried the configuration mentioned here as well but there is no VFD output. Is there any other configuration I have to check or modify for the VFD to work? leds { leds_clk = <0x23 0x08 0x0b 0x00>; leds_dat = <0x23 0x08 0x0c 0x00>; status = "okay"; }; fd655_para { device_type = "fd655_para"; compatible = "Ik,fd655_dev"; fd655_clk_io = <0x23 0x07 0x06 0x01>; fd655_dat_io = <0x23 0x07 0x07 0x01>; status = "okay"; }; ald-colorleds { compatible = "elebao,colorleds"; dev_name = "ald-colorleds"; pinctrl-0 = <0x70>; colorleds_data_gpio = <0x23 0x07 0x02 0x01>; status = "okay"; }; I tried to make the module as you have instructed, however I am getting the below given error messages. /tm16xx-display# make module make EXTRA_CFLAGS="-DCONFIG_TM16XX -DCONFIG_TM16XX_KEYPAD -DCONFIG_TM16XX_I2C -DCONFIG_TM16XX_SPI -include /root/tm16xx-display/drivers/auxdisplay/tm16xx_compat.h -I/root/tm16xx-display/include/" -C /lib/modules/6.12.11-edge-sunxi64/build M=/root/tm16xx-display/drivers/auxdisplay CONFIG_TM16XX=m CONFIG_TM16XX_KEYPAD=y CONFIG_TM16XX_I2C=m CONFIG_TM16XX_SPI=m CONFIG_LINEDISP=m modules make[1]: Entering directory '/usr/src/linux-headers-6.12.11-edge-sunxi64' CC [M] /root/tm16xx-display/drivers/auxdisplay/line-display.o CC [M] /root/tm16xx-display/drivers/auxdisplay/tm16xx_core.o CC [M] /root/tm16xx-display/drivers/auxdisplay/tm16xx_keypad.o LD [M] /root/tm16xx-display/drivers/auxdisplay/tm16xx.o CC [M] /root/tm16xx-display/drivers/auxdisplay/tm16xx_i2c.o CC [M] /root/tm16xx-display/drivers/auxdisplay/tm16xx_spi.o MODPOST /root/tm16xx-display/drivers/auxdisplay/Module.symvers CC [M] /root/tm16xx-display/drivers/auxdisplay/line-display.mod.o In file included from /root/tm16xx-display/drivers/auxdisplay/line-display.mod.c:2: /root/tm16xx-display/drivers/auxdisplay/line-display.mod.c:13:41: error: expected ‘)’ before ‘LINEDISP’ 13 | KSYMTAB_FUNC(linedisp_attach, "_gpl", ""LINEDISP""); | ^~~~~~~~ ./include/linux/export-internal.h:45:28: note: in definition of macro ‘__KSYMTAB’ 45 | " .asciz \"" ns "\"" "\n" \ | ^~ /root/tm16xx-display/drivers/auxdisplay/line-display.mod.c:13:1: note: in expansion of macro ‘KSYMTAB_FUNC’ 13 | KSYMTAB_FUNC(linedisp_attach, "_gpl", ""LINEDISP""); | ^~~~~~~~~~~~ ./include/linux/export-internal.h:41:12: note: to match this ‘(’ 41 | asm(" .section \"__ksymtab_strings\",\"aMS\",%progbits,1" "\n" \ | ^ ./include/linux/export-internal.h:62:41: note: in expansion of macro ‘__KSYMTAB’ 62 | #define KSYMTAB_FUNC(name, sec, ns) __KSYMTAB(name, KSYM_FUNC(name), sec, ns) | ^~~~~~~~~ /root/tm16xx-display/drivers/auxdisplay/line-display.mod.c:13:1: note: in expansion of macro ‘KSYMTAB_FUNC’ 13 | KSYMTAB_FUNC(linedisp_attach, "_gpl", ""LINEDISP""); | ^~~~~~~~~~~~ /root/tm16xx-display/drivers/auxdisplay/line-display.mod.c:14:41: error: expected ‘)’ before ‘LINEDISP’ 14 | KSYMTAB_FUNC(linedisp_detach, "_gpl", ""LINEDISP""); | ^~~~~~~~ ./include/linux/export-internal.h:45:28: note: in definition of macro ‘__KSYMTAB’ 45 | " .asciz \"" ns "\"" "\n" \ | ^~ /root/tm16xx-display/drivers/auxdisplay/line-display.mod.c:14:1: note: in expansion of macro ‘KSYMTAB_FUNC’ 14 | KSYMTAB_FUNC(linedisp_detach, "_gpl", ""LINEDISP""); | ^~~~~~~~~~~~ ./include/linux/export-internal.h:41:12: note: to match this ‘(’ 41 | asm(" .section \"__ksymtab_strings\",\"aMS\",%progbits,1" "\n" \ | ^ ./include/linux/export-internal.h:62:41: note: in expansion of macro ‘__KSYMTAB’ 62 | #define KSYMTAB_FUNC(name, sec, ns) __KSYMTAB(name, KSYM_FUNC(name), sec, ns) | ^~~~~~~~~ /root/tm16xx-display/drivers/auxdisplay/line-display.mod.c:14:1: note: in expansion of macro ‘KSYMTAB_FUNC’ 14 | KSYMTAB_FUNC(linedisp_detach, "_gpl", ""LINEDISP""); | ^~~~~~~~~~~~ /root/tm16xx-display/drivers/auxdisplay/line-display.mod.c:15:43: error: expected ‘)’ before ‘LINEDISP’ 15 | KSYMTAB_FUNC(linedisp_register, "_gpl", ""LINEDISP""); | ^~~~~~~~ ./include/linux/export-internal.h:45:28: note: in definition of macro ‘__KSYMTAB’ 45 | " .asciz \"" ns "\"" "\n" \ | ^~ /root/tm16xx-display/drivers/auxdisplay/line-display.mod.c:15:1: note: in expansion of macro ‘KSYMTAB_FUNC’ 15 | KSYMTAB_FUNC(linedisp_register, "_gpl", ""LINEDISP""); | ^~~~~~~~~~~~ ./include/linux/export-internal.h:41:12: note: to match this ‘(’ 41 | asm(" .section \"__ksymtab_strings\",\"aMS\",%progbits,1" "\n" \ | ^ ./include/linux/export-internal.h:62:41: note: in expansion of macro ‘__KSYMTAB’ 62 | #define KSYMTAB_FUNC(name, sec, ns) __KSYMTAB(name, KSYM_FUNC(name), sec, ns) | ^~~~~~~~~ /root/tm16xx-display/drivers/auxdisplay/line-display.mod.c:15:1: note: in expansion of macro ‘KSYMTAB_FUNC’ 15 | KSYMTAB_FUNC(linedisp_register, "_gpl", ""LINEDISP""); | ^~~~~~~~~~~~ /root/tm16xx-display/drivers/auxdisplay/line-display.mod.c:16:45: error: expected ‘)’ before ‘LINEDISP’ 16 | KSYMTAB_FUNC(linedisp_unregister, "_gpl", ""LINEDISP""); | ^~~~~~~~ ./include/linux/export-internal.h:45:28: note: in definition of macro ‘__KSYMTAB’ 45 | " .asciz \"" ns "\"" "\n" \ | ^~ /root/tm16xx-display/drivers/auxdisplay/line-display.mod.c:16:1: note: in expansion of macro ‘KSYMTAB_FUNC’ 16 | KSYMTAB_FUNC(linedisp_unregister, "_gpl", ""LINEDISP""); | ^~~~~~~~~~~~ ./include/linux/export-internal.h:41:12: note: to match this ‘(’ 41 | asm(" .section \"__ksymtab_strings\",\"aMS\",%progbits,1" "\n" \ | ^ ./include/linux/export-internal.h:62:41: note: in expansion of macro ‘__KSYMTAB’ 62 | #define KSYMTAB_FUNC(name, sec, ns) __KSYMTAB(name, KSYM_FUNC(name), sec, ns) | ^~~~~~~~~ /root/tm16xx-display/drivers/auxdisplay/line-display.mod.c:16:1: note: in expansion of macro ‘KSYMTAB_FUNC’ 16 | KSYMTAB_FUNC(linedisp_unregister, "_gpl", ""LINEDISP""); | ^~~~~~~~~~~~ make[3]: *** [scripts/Makefile.modfinal:31: /root/tm16xx-display/drivers/auxdisplay/line-display.mod.o] Error 1 make[2]: *** [/usr/src/linux-headers-6.12.11-edge-sunxi64/Makefile:1870: modules] Error 2 make[1]: *** [Makefile:224: __sub-make] Error 2 make[1]: Leaving directory '/usr/src/linux-headers-6.12.11-edge-sunxi64' make: *** [Makefile:50: module] Error 2 root@homeassistant2:~/tm16xx-display# make-module install make-module: command not found root@homeassistant2:~/tm16xx-display# make module-install make -C /lib/modules/6.12.11-edge-sunxi64/build M=/root/tm16xx-display/drivers/auxdisplay CONFIG_TM16XX=m CONFIG_TM16XX_KEYPAD=y CONFIG_TM16XX_I2C=m CONFIG_TM16XX_SPI=m CONFIG_LINEDISP=m modules_install INSTALL_MOD_PATH= make[1]: Entering directory '/usr/src/linux-headers-6.12.11-edge-sunxi64' DEPMOD /lib/modules/6.12.11-edge-sunxi64 Warning: modules_install: missing 'System.map' file. Skipping depmod. make[1]: Leaving directory '/usr/src/linux-headers-6.12.11-edge-sunxi64' root@homeassistant2:~/tm16xx-display# make service-install modprobe tm16xx modprobe: ERROR: could not insert 'tm16xx': Exec format error make: *** [Makefile:60: service-install] Error 1