[Touch screen in Pine64]

Follow my attempt to make touch work on Pine64.

I confirmed that "ads7846" and "ads7846_device" already installed. Even though there was a warning about missing "system.map" but it seems those modules have been installed.

lsmod and ads7846 was there but not ads7846_device.

I tried

dmesg | grep ads7846

but it gave error:

ads7846_device: Unable to get IRQ assigned to gpio_pendown'

It seems that Armbian Mainline on Pine64 has not configured assign interrupt for pin?! Or kernel for Pine64 cannot IRQ for GPIO71

sudo modprobe ads7846_device model=7846 cs=1 gpio_pendown=71 keep_vref_on=1 swap_xy=1 pressure_max=255 x_plate_ohms=60 x_min=200 x_max=3900 y_min=200 y_max=3900

Any idea?!

[Touch screen in Pine64]

Mainline stable Armbian stable for Pine64 worked great.

I have successfully make my 3.5 TFT screen work but not the touch screen. I read some tutorials,  mostly guide.

This guide for TFT and Touch is really detailed. For touch:

- Step 1: ads7846 driver seems ok

- Step 2: ads7846_device there is a warning after make and make install, and it said to skip depmod

- After this, I tried 

sudo modprob ads7846
sudo modprob ads7846_device model=7846 cs=1 gpio_pendown=1 keep_vref_on=1 swap_xy=1 pressure_max=255 x_plate_ohms=60 x_min=200 x_max=3900 y_min=200 y_max=3900

ads7846 is ok (confirmed with lsmod).

But ads7846_device return invalid argument, it means that module ads7846_device is not in the system.

Anyone succeed with Pine64?

[How to change resolution HDMI display (Armbian5.27)?]

@Fenn Do you still have to put something other on armbianEnv.txt and boot.cmd or just put extraaargs to make it worked?

[Waveshare 3.5 on Pine64]

@Igor I double checked my script and made a mistake about fbtft. After followed @martinayotte, the screen changed to black (not fully black), and /dev/fb0 appeared. So I thought that initialized ok, but actually not ok.

The working script should be:

sudo modprobe fbtft_device name=piscreen gpios=reset:79,dc:78 speed=16000000

The important parts here are choosing right gpios (reset & dc) and speed (for color correction).

After this step, the others are almost the same with Rpi.  (Pygame should define SDL_FBDEV=/dev/fb0 & SDL_VIDEODRIVER=fbcon ???)

[Waveshare 3.5 on Pine64]

@Igor I have checked your github but no success. The problem I found that modules fbcon is not loaded. 

When I tried "sudo modprobe fbcon" it return:

modprobe: FATAL: Module fbcon not found in directory /lib/modules/4.19.13-sunxi64

PS: I rechecked and fbcon folder still in /sys/class/graphics and while I add fbtft to /dev/fb0. 

I still don't know why when I set SDL_FBDEV to /dev/fb0 I still get the error.

[Waveshare 3.5 on Pine64]

 

Thanks @martinayotte for the suggestion. I made LCD initiated and /dev/fb0 appeared. 

But I got another problem when tried to display something on it.

My intention is to use python display information on LCD, so that I use pygame.

But when I tried to start screen display there is error which I could not find the answer.

Quote

import os, pygame

os.environ['SDL_FBDEV'] = '/dev/fb0'

pygame.init()

pygame.display.init()

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

pygame.error: Unable to open a console terminal

 

 

[Waveshare 3.5 on Pine64]

I have a Pine64+ 2GB and use Waveshare 3.5 (A). Armbian Bionic Ubuntu installed.

I tried to initiate Waveshare screen by following steps:

- Enable spidev0.0 from armbianEnv.txt (confirm with /dev/spidev0.0)

- modprobe fbtft by:

sudo modprobe fbtft_device name=piscreen

But I got error with step 2. Here is the output of dmesg

[ 4419.154174] fbtft: module is from the staging directory, the quality is unknown, you have been warned.
[ 4419.163004] fbtft_device: module is from the staging directory, the quality is unknown, you have been warned.
[ 4419.164436] spidev spi0.0: spidev spi0.0 1000kHz 8 bits mode=0x00
[ 4419.164564] spidev spi0.0: Deleting spi0.0
[ 4419.165176] fbtft_device: GPIOS used by 'piscreen':
[ 4419.165183] fbtft_device: 'reset' = GPIO25
[ 4419.165187] fbtft_device: 'dc' = GPIO24
[ 4419.165190] fbtft_device: 'led' = GPIO22
[ 4419.165203] spi spi0.0: fb_ili9486 spi0.0 32000kHz 8 bits mode=0x00
[ 4419.186567] fb_ili9486: module is from the staging directory, the quality is unknown, you have been warned.
[ 4419.188554] fb_ili9486 spi0.0: fbtft_request_gpios: gpio_request_one('reset'=25) failed with -517

It seems that GPIO25 is not responded. I know that many have success with OrangePi, but no one with Pine64.

Any suggestion?

 

Thanks.