No display with HK1 Box On Armbian

[lChiehZ]

Hi, Arthur

Thanks for your openvfd first, But I'm having trouble with it not working!

I used HK1 Box (a TV Box similar X96 Max Plus, And with the Amlogic S905X3 Soc) running Armbian 20.10 bullseye 5.9.0,
And I compile openvfd driver With Amlogic_s905-kernel, make option ARCH is arm64 CROSS_COMPILE is aarch64-linux-gnu-
Then I source hk1-x3-vfd.conf and run this command:

insmod openvfd.ko vfd_gpio_clk=${vfd_gpio_clk} \
                         vfd_gpio_dat=${vfd_gpio_dat} \
                         vfd_gpio_stb=${vfd_gpio_stb:-0,0,0xFF} \
                         vfd_gpio0=${vfd_gpio0:-0,0,0xFF} \
                         vfd_gpio1=${vfd_gpio1:-0,0,0xFF} \
                         vfd_gpio2=${vfd_gpio2:-0,0,0xFF} \
                         vfd_gpio3=${vfd_gpio3:-0,0,0xFF} \
                         vfd_gpio_protocol=${vfd_gpio_protocol:-0,0} \
                         vfd_chars=${vfd_chars} vfd_dot_bits=${vfd_dot_bits} \
                         vfd_display_type=${vfd_display_type}

And I from dmesg get this:

[ 1476.669968] OpenVFD: Version: V1.3.0
[ 1476.669989] OpenVFD: vfd_gpio_clk:		#0 = 0x00; #1 = 0x41; #2 = 0x00; 
[ 1476.670001] OpenVFD: vfd_gpio_dat:		#0 = 0x00; #1 = 0x40; #2 = 0x00; 
[ 1476.670012] OpenVFD: vfd_gpio_stb:		#0 = 0x00; #1 = 0x00; #2 = 0xFF; 
[ 1476.670023] OpenVFD: vfd_gpio0:		#0 = 0x00; #1 = 0x00; #2 = 0xFF; 
[ 1476.670034] OpenVFD: vfd_gpio1:		#0 = 0x00; #1 = 0x00; #2 = 0xFF; 
[ 1476.670044] OpenVFD: vfd_gpio2:		#0 = 0x00; #1 = 0x00; #2 = 0xFF; 
[ 1476.670055] OpenVFD: vfd_gpio3:		#0 = 0x00; #1 = 0x00; #2 = 0xFF; 
[ 1476.670064] OpenVFD: vfd_gpio_protocol:	#0 = 0x00; #1 = 0x00; 
[ 1476.670078] OpenVFD: vfd_chars:		#0 = 0x00; #1 = 0x04; #2 = 0x03; #3 = 0x02; #4 = 0x01; 
[ 1476.670096] OpenVFD: vfd_dot_bits:		#0 = 0x00; #1 = 0x01; #2 = 0x03; #3 = 0x02; #4 = 0x04; #5 = 0x05; #6 = 0x06; 
[ 1476.670108] OpenVFD: vfd_display_type:	#0 = 0x00; #1 = 0x00; #2 = 0x00; #3 = 0x06; 
[ 1476.670119] OpenVFD: Detected gpio chips:	aobus-banks, periphs-banks.
[ 1476.670130] OpenVFD: "periphs-banks" chip found.	base = 427, pin count = 85, pin = 65, offset = 492
[ 1476.670139] OpenVFD: "periphs-banks" chip found.	base = 427, pin count = 85, pin = 64, offset = 491
[ 1476.670144] OpenVFD: Skipping vfd_gpio_stb evaluation (0xFF)
[ 1476.670148] OpenVFD: Skipping vfd_gpio0 evaluation (0xFF)
[ 1476.670153] OpenVFD: Skipping vfd_gpio1 evaluation (0xFF)
[ 1476.670158] OpenVFD: Skipping vfd_gpio2 evaluation (0xFF)
[ 1476.670162] OpenVFD: Skipping vfd_gpio3 evaluation (0xFF)
[ 1476.670658] OpenVFD: Select FD6551 controller
[ 1476.670829] OpenVFD: SW I2C interface intialized (address = 0x0000 (N/A), MSB mode, pull-ups off)
root@arm-64:~# 

Then I use ./OpenVFDService ,But nothing happen, The LCD screen still does not show.

Also I have tried source x96-max-1gbit-vfd.conf, I will get this from dmesg:

[ 1786.779440] OpenVFD: Version: V1.3.0
[ 1786.779459] OpenVFD: vfd_gpio_clk:		#0 = 0x00; #1 = 0x41; #2 = 0x00; 
[ 1786.779471] OpenVFD: vfd_gpio_dat:		#0 = 0x00; #1 = 0x40; #2 = 0x00; 
[ 1786.779482] OpenVFD: vfd_gpio_stb:		#0 = 0x01; #1 = 0x0A; #2 = 0x00; 
[ 1786.779493] OpenVFD: vfd_gpio0:		#0 = 0x00; #1 = 0x00; #2 = 0xFF; 
[ 1786.779504] OpenVFD: vfd_gpio1:		#0 = 0x00; #1 = 0x00; #2 = 0xFF; 
[ 1786.779514] OpenVFD: vfd_gpio2:		#0 = 0x00; #1 = 0x00; #2 = 0xFF; 
[ 1786.779525] OpenVFD: vfd_gpio3:		#0 = 0x00; #1 = 0x00; #2 = 0xFF; 
[ 1786.779534] OpenVFD: vfd_gpio_protocol:	#0 = 0x00; #1 = 0x00; 
[ 1786.779548] OpenVFD: vfd_chars:		#0 = 0x04; #1 = 0x00; #2 = 0x01; #3 = 0x02; #4 = 0x03; 
[ 1786.779565] OpenVFD: vfd_dot_bits:		#0 = 0x00; #1 = 0x01; #2 = 0x02; #3 = 0x03; #4 = 0x04; #5 = 0x05; #6 = 0x06; 
[ 1786.779578] OpenVFD: vfd_display_type:	#0 = 0x02; #1 = 0x00; #2 = 0x01; #3 = 0x00; 
[ 1786.779588] OpenVFD: Detected gpio chips:	aobus-banks, periphs-banks.
[ 1786.779599] OpenVFD: "periphs-banks" chip found.	base = 427, pin count = 85, pin = 65, offset = 492
[ 1786.779608] OpenVFD: "periphs-banks" chip found.	base = 427, pin count = 85, pin = 64, offset = 491
[ 1786.779616] OpenVFD: "aobus-banks" chip found.	base = 412, pin count = 15, pin = 10, offset = 422
[ 1786.779622] OpenVFD: Skipping vfd_gpio0 evaluation (0xFF)
[ 1786.779627] OpenVFD: Skipping vfd_gpio1 evaluation (0xFF)
[ 1786.779632] OpenVFD: Skipping vfd_gpio2 evaluation (0xFF)
[ 1786.779636] OpenVFD: Skipping vfd_gpio3 evaluation (0xFF)
[ 1786.780108] OpenVFD: Select FD628 controller
[ 1786.780144] OpenVFD: SW SPI 3-wire interface intialized (LSB mode)
root@arm-64:~# 

But still not working, Include ./OpenVFDService -t

Above, can you help me? Thanks.

[lChiehZ]

BTW, It works fine when I use CoreELEC-Amlogic-ng.arm-19.2-Matrix_rc2 With this vfd.conf:

vfd_gpio_clk='0,65,0'
vfd_gpio_dat='0,64,0'
vfd_gpio_stb='0,0,0xFF'
vfd_chars='0,4,3,2,1'
vfd_dot_bits='0,1,3,2,4,5,6'
vfd_display_type='0x00,0x00,0x00,0x06'

[arthur-liberman]

As I mentioned in the other issue with a similar problem, I've not tested this on 5.x kernel in general, nor on Armbian specifically.
Maybe they have the pins mapped differently in the new/mainline kernel and that's why it doesn't work, I don't really know.

[lChiehZ]

As I mentioned in the other issue with a similar problem, I've not tested this on 5.x kernel in general, nor on Armbian specifically.
Maybe they have the pins mapped differently in the new/mainline kernel and that's why it doesn't work, I don't really know.

Thank you Arthur! I carefully compared the GPIO mapping between the two systems, and there are indeed some differences, and now I have successfully lit up the LCD screen!

Thank you very much!

[danboid]

Hi @lChiehZ

Could you please share your working config file or explain how you worked out the correct values? I have got a X96 Air running Manjaro that I failed to get working with openvfd, even tho it works fine with openelec.

Thanks

[Jeebus678]

@lChiehZ Bumping this thread to see if you can post your findings. Curious as well.

[danboid]

@Jeebus678 see the post from 16th Oct from chbgdn in #8 . I've not tried it yet but please let us know if it works for you.

[lChiehZ]

Hi @danboid @Jeebus678

Sorry I'm just seeing it now, I don't have the equipment in my hands right now, but I can tell you the points that need attention.
For example, in the dtb file

leds {
    compatible = "gpio-leds";
    status = "okay";
    sys_led {
        label = "sys_led";
        gpios = <0x75 0x0b 0x00>; //0x75 is the phandle for bank@14, note to modify your own
        default-state = "on";
        linux,default-trigger = "default-on";
    };
};

The above code is correct to display the power light normally.

Then check the GPIO mapping of your own device, e.g.
This conf works fine in CoreELEC, the

vfd_gpio_clk='0,65,0'
vfd_gpio_dat='0,64,0'

so check what gpio pins 65 and 64 are in CoreELEC.
Finally, find the corresponding pins in the system you need to use
For example, the last conf I used was.

vfd_gpio_clk='0,64,0'
vfd_gpio_dat='0,63,0'
vfd_gpio_stb='0,0,0xFF'
vfd_chars='0,4,3,2,1'
vfd_dot_bits='0,1,3,2,4,5,6'
vfd_display_type='0x00,0x00,0x00,0x06'

Good luck!

[Jeebus678]

@lChiehZ

Thank you for the reply. I am trying to work the vfd on a tx mini 3, which is different although I imagine the idea is the same. I'm having trouble mapping the GPIOs. How do I figure out what pins are in charge of the 7-segment, and once I have that declared within my DTB and/or my vfd.conf, how do I actually write to the LCD? Thanks.

[arthur-liberman]

Closing due to lack of activity. Please let me know if you still have an issue with the latest commits pushed recently.