Go to advanced search

by pvdmeer
Mon Nov 12, 2018 8:20 am
Forum: Troubleshooting
Topic: RPI touchscreen dead column
Replies: 3
Views: 221

Re: RPI touchscreen dead column

Have the same problem. About 10% of the official touchscreens we used have degraded or totally dead touch area. Have you come up with a fix for this?
by pvdmeer
Wed Jul 11, 2018 7:02 pm
Forum: Raspbian
Topic: TLV320AIC3254 interfacing with raspberry pi jessie
Replies: 1
Views: 242

Re: TLV320AIC3254 interfacing with raspberry pi jessie

There is certainly support for the TLV320AIC31xx in the 4.14 RPI kernel. I just enabled this module. You have to go into the ALSA configuration. alsa -> alsa soc -> codecs .. enable them. then build the codecs directory and install the .ko's to /lib/modules/`uname -r`/..... . That's the easy part. T...
by pvdmeer
Mon May 21, 2018 8:57 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: USB MIDI (and HID devices) on Pi3
Replies: 1
Views: 215

Re: USB MIDI (and HID devices) on Pi3

Alright, after searching the Raspberry Pi Linux kernel Github... The solution can be found that makes these type of USB MIDI controllers work in USB2 mode:

in /boot/cmdline.txt, add the following:

dwc_otg.fiq_fsm_mask=0x3 dwc_otg.nak_holdoff=0

Seems to fix all, but will do some more testing.
by pvdmeer
Sun May 20, 2018 8:31 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: USB MIDI (and HID devices) on Pi3
Replies: 1
Views: 215

USB MIDI (and HID devices) on Pi3

Dear all, I'm using the Pi3 in a synthesizer product, and I have to say I really love it.. and overall it was a great choice to include it in the product instead because it provides relatively easy interfacing with display, easy GUI development, and has enough processing power with it's multiple cor...
by pvdmeer
Wed Apr 11, 2018 7:21 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: PT8211 I2S ASOC driver
Replies: 14
Views: 1275

Re: PT8211 I2S ASOC driver

just check hifiberry_dac.c in the kernel sources and change: .dai_fmt = SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS, notice the LEFT_J define in t here.. bcm2835-i2s.c needs an additional case in the switch: switch (dev->fmt & SND_SOC_DAIFMT_FORMAT_MASK) { case SND_SOC_DAIF...
by pvdmeer
Fri Mar 09, 2018 1:48 pm
Forum: Troubleshooting
Topic: USB MIDI, missing MIDI events
Replies: 9
Views: 895

Re: USB MIDI, missing MIDI events

well, that worked! cheers!
by pvdmeer
Fri Mar 09, 2018 1:46 pm
Forum: Troubleshooting
Topic: USB MIDI, missing MIDI events
Replies: 9
Views: 895

Re: USB MIDI, missing MIDI events

First things first, I'm also using Arturias (beatstep and keystep). They seem to really hate the Pi's ALSA rawmidi system. There are hanging notes all over the place. Happens especially with high bandwidth controls such as aftertouch. No problems when I use these Arturias with my Mac. Although I hav...
by pvdmeer
Fri Mar 09, 2018 1:40 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: PT8211 I2S ASOC driver
Replies: 14
Views: 1275

Re: PT8211 I2S ASOC driver

you need to add a case in the switch statement for LEFT_JUSTIFIED mode, from the top of my head. but beware. the PT8211 is not a HIFI DAC, and without a really good LDO regulator it will sounds like S%%^T :D
by pvdmeer
Tue Sep 05, 2017 11:42 am
Forum: Official Foundation Display
Topic: Bogus touch events on newer (FT5426 based) touchscreens
Replies: 1
Views: 1368

Re: Bogus touch events on newer (FT5426 based) touchscreens

characterizing the bug.. and trying to devise some filtering mechanism to weed out the bad events. It seems the bogus events have the following form: [x,y] = [WIDTH - last.y, WIDTH - last.x] where last means the last touch event coordinates. basically, this mirrors coordinates along a diagonal. even...
by pvdmeer
Mon Aug 28, 2017 10:34 am
Forum: Official Foundation Display
Topic: Bogus touch events on newer (FT5426 based) touchscreens
Replies: 1
Views: 1368

Bogus touch events on newer (FT5426 based) touchscreens

Dear all, We started using the touchscreen early 2016 and we have loved it ever since. We continue using the latest version (using FT5426 instead of FT5406). Recently, however, we noticed that there were bogus touch events when repeatedly tapping in the lower side of the screen. Is this a known issu...
by pvdmeer
Thu Jan 19, 2017 12:22 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread.
Replies: 868
Views: 366611

Re: The I2S sound thread.

i have not found a way around the device tree yet. :( i tried to made a device tree overlay and it compiles and installs. it's not that hard it seems. i've been struggling with the same problem as you have. direct in direct out via I2S (no dac or adc involved). while it's quite easy to hack an exist...
by pvdmeer
Tue Jan 17, 2017 9:20 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread.
Replies: 868
Views: 366611

Re: The I2S sound thread.

esuncloud: yes, it's possible. the Cirrus Logic Audio Card can do direct-in-direct-out.
by pvdmeer
Tue Dec 20, 2016 9:01 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: PT8211 I2S ASOC driver
Replies: 14
Views: 1275

PT8211 I2S ASOC driver

Hi! I recently hacked the Hifiberry-DAC driver so that it would support the PT8211 16 bit stereo DAC. This works flawlessly, and it's damn easy to wire this up to the pi. I'd like to make this a real driver and contribute to rpi-linux repository. Unfortunately, when I change the name from snd-soc-hi...
by pvdmeer
Tue Dec 20, 2016 8:06 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: STICKY: The I2S sound thread.
Replies: 868
Views: 366611

Re: The I2S sound thread.

Hi! I recently hacked the Hifiberry-DAC driver so that it would support the PT8211 16 bit stereo DAC. This works flawlessly, and it's damn easy to wire this up to the pi. I'd like to make this a real driver and contribute to rpi-linux repository. Unfortunately, when I change the name from snd-soc-hi...
by pvdmeer
Sat Dec 17, 2016 10:00 am
Forum: Raspbian
Topic: How to disable screen blanking
Replies: 42
Views: 242129

Re: How to disable screen blanking

i work in the console environment and i tried all of the above with varying degrees of success. the best i could get was no screensaver until a keyboard was plugged in.. so changing /etc/kbd/config definitely is not enough. best is to turn off console blanking in the kernel. pull the problem out by ...
by pvdmeer
Thu Nov 17, 2016 11:05 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: PI3 and dual UART
Replies: 2
Views: 802

PI3 and dual UART

Hi all, In the recent year I've used /dev/ttyAMA0 quite a lot on PI2 and PI3. You can use this to comfortably talk with other devices via just two simple wires. To this goal I've edited /boot/config.txt to have "enable_uart=1" and "overlay=pi3-disable-bt" However, I'd like to attach another device a...
by pvdmeer
Mon Feb 22, 2016 10:39 am
Forum: Troubleshooting
Topic: Pyinstaller missing Linux-32bit-arm/run
Replies: 12
Views: 5457

Re: Pyinstaller missing Linux-32bit-arm/run

it would be great if somebody could just put the bootloader binaries online ?

Go to advanced search