[Buildroot] Fwd: Fwd: Fwd: Fwd: [PATCH v3] linux: add fbtft kernel extension

[Lou Crittenden]

NEVERMIND NEVERMIND!  Your script works! It turns out I forgot to enable
the fbtft_device drivers in make linuxconfig. I ran a "make clean all"
beforehand and forgot I had to run make linuxconfig then run make all.



On Tue, Jan 13, 2015 at 5:19 PM, Lou Crittenden <loucrittenden63 at gmail.com>
wrote:

> We're getting closer, but no cigar yet.
>
> The script runs at boot.
>
> I ran /etc/init.d/S30fbtft start to start the script and it outputs:
>
> starting waveshare: OK
>
> then outputs:
>
> FATAL: module fbtft_device not found.
>
> and the screen doesn't initialize.
>
> The error also shows up while booting up.
>
>  I can also run modprobe fbtft_device name=waveshare32b and I get the same
> error message.
>
>
>
>
> On Tue, Jan 13, 2015 at 3:41 PM, Peter Seiderer <ps.report at gmx.net> wrote:
>
>> Hello Lou,
>>
>> On Mon, Jan 12, 2015 at 11:58:16PM -0600, Lou Crittenden wrote:
>> > As for the drivers starting up @ boot, I followed the advice of this
>> page:
>> >
>> http://unix.stackexchange.com/questions/59018/create-and-control-start-up-scripts-in-busybox
>> > (I have busybox enabled) and attempted to make a simple script in the
>> > /etc/init.d/ folder called fbtft, but no go.
>> >
>> > here it is (and I did make sure to run chmod +x on it to make it
>> > executable):
>> >
>> > #!/bin/sh
>> >
>> > exec insmod
>> /lib/modules/3.12.28/kernel/drivers/video/fbtft/fbtft_device.ko
>> > name=waveshare32b rotate=270
>> >
>> > exec insmod
>> /lib/modules/3.12.28/kernel/drivers/input/touchscreen/ads7846.ko
>> >
>>
>> The following script '/etc/init.d/S30fbtft' should work:
>> --- begin ----
>> #!/bin/sh
>> #
>> # Start waveshare32b (fbtft_device, ads7846_device)
>> #
>>
>> case "$1" in
>>   start)
>>         echo -n "Starting waveshare32b: "
>>         modprobe fbtft_device name=waveshare32b rotate=270
>>         # from https://github.com/notro/fbtft/issues/181
>>         modprobe ads7846_device model=7846 cs=1 gpio_pendown=17
>> speed=1000000 keep_vref_on=1 swap_xy=0 pressure_max=255 x_plate_ohms=60
>> x_min=200 x_max=3900 y_min=200 y_max=3900
>>         # from
>> http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=95231
>>         # modprobe ads7846_device model=7846 cs=1 gpio_pendown=17
>> speed=1000000 keep_vref_on=1 swap_xy=0
>>         echo "OK"
>>         ;;
>>   stop)
>>         echo -n "Stopping waveshare32b: "
>>         rmmod fbtft_device
>>         rmmod fb_ili9340
>>         rmmod ads7846_device
>>         rmmod ads7846
>>         echo "OK"
>>         ;;
>>   restart|reload)
>>         ;;
>>   *)
>>         echo "Usage: $0 {start|stop|restart}"
>>         exit 1
>> esac
>>
>> exit $?
>> --- end ---
>>
>> For testing use
>> $ /etc/init.d/S30fbtft start
>> or
>> $ /etc/init.d/S30fbtft stop
>>
>> On success there should be a second framebuffer device /dev/fb1 and an
>> additional
>> input device e.g. /dev/input/event3
>>
>> For testing the the touch I use
>> $ cat /dev/input/event3 | hexdump
>> or
>> $ evtest
>> which shows all input event devices with name and gives nice human
>> readable output
>> (your have to enable the buildroot package first)...
>>
>> Regards,
>> Peter
>>
>
>
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