Search found 181 matches

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by lukas
07 Apr 2021, 18:21
Forum: Hardware
Topic: GPIO Config für ConBridge Multiplexer
Replies: 6
Views: 929

Re: GPIO Config für ConBridge Multiplexer

Könntest Du das etwas näher ausführen? Kann gut sein, daß ich demächst diese Umschaltung auch brauche. Welcher Widerstand? Okay dass du als Power-User das Feature gebrauchen kannst, hätte ich mir auch denken können. ;) Mir wurde gesagt, dass ein Widerstand irrtümlich entfernt wurde, aber ich finde ...
by lukas
31 Mar 2021, 20:22
Forum: Software
Topic: Auflösung PT100
Replies: 5
Views: 805

Re: Auflösung PT100

Weis denn niemand eine Lösung? Nicht mal der Hersteller? Wenigstens eine kleine Status Antwort, falls das Problem in bearbeitung ist..? Das wissen offenbar höchstens ehemalige Mitarbeiter. ;) Im piControl Quelltext findest du die Datei pt100_table.inc . Da ist eine Tabelle drin, über die eine binär...
by lukas
31 Mar 2021, 20:02
Forum: Hardware
Topic: GPIO Config für ConBridge Multiplexer
Replies: 6
Views: 929

Re: GPIO Config für ConBridge Multiplexer

Der GPIO 4 wird über /boot/dt-blob.bin gesetzt. Den Quelltext davon findest du hier . Hintergrundinfos zur dt-blob.bin sind hier . Das ist ein Software Workaround für ein Hardware Erratum der Connect-Revision, die vor 1 Jahr eingeführt wurde. Da wurde irrtümlich ein Widerstand rausgenommen. Meine eh...
by lukas
31 Mar 2021, 19:49
Forum: Software
Topic: Non-monotonic clock when rebooting with no internet access
Replies: 6
Views: 625

Re: Non-monotonic clock when rebooting with no internet access

The timestamp is saved in /var/lib/systemd/timesync/clock. See here and here.
by lukas
27 Nov 2020, 10:44
Forum: Hardware
Topic: RevPi Compact EERAM
Replies: 4
Views: 969

Re: RevPi Compact EERAM

Forgot to mention, support for the EERAM was added after the Stretch 6/2020 image was released. My former colleagues at Kunbus haven't pushed a new release of the raspberrypi-kernel package to the apt-repository since then. Until they do that, you need to build your own kernel with kernelbakery . So...
by lukas
26 Nov 2020, 16:11
Forum: Hardware
Topic: RevPi Compact EERAM
Replies: 4
Views: 969

Re: RevPi Compact EERAM

I've documented the EERAM's usage internally but apparently that part of the documentation hasn't found its way to the Compact Tutorials page yet: Briefly, the EERAM is exposed as a generic file called /sys/bus/nvmem/devices/1-00500/nvmem. You just need to open/read/write/close this file. Anything w...
by lukas
18 Nov 2020, 11:40
Forum: Hardware
Topic: spidev0.0 on RevPi Connect+ does not transmit and receive the same information
Replies: 7
Views: 1146

Re: spidev0.0 on RevPi Connect+ does not transmit and receive the same information

The Con CAN option in webstatus merely loads a devicetree overlay which instantiates the CAN slave below the SPI master (and sets the status of the spidev slave to "disabled"). This looks like the RX line is pulled high. I'd suggest to double-check the wiring and verify whether the correct...
by lukas
11 Nov 2020, 12:54
Forum: Hardware
Topic: About the Interface of RevPie Compact
Replies: 4
Views: 1129

Re: About the Interface of RevPie Compact

First picture shows the camera port. Second picture shows the Micro-USB port to access the eMMC. The camera port uses an HDMI connector to transmit CSI signals. To use it, you need: Raspberry Pi Camera ( HQ or V2 or NoIR V2 ) Pi Camera HDMI Cable Extension (adapts CSI signals to HDMI interface) HDMI...
by lukas
01 Sep 2020, 14:40
Forum: Software
Topic: 2x RevPi Core via PiBridge
Replies: 8
Views: 1861

Re: 2x RevPi Core via PiBridge

How about configuring netfilter rules to set up a firewall on the PiBridge Ethernet? You should also be able to talk to a neighboring Core with RS485 by opening /dev/ttyAMA0 on each of them with miniterm or something like that. Instead of cutting away the Ethernet pins, you can just shut down the pi...
by lukas
01 Sep 2020, 12:08
Forum: Software
Topic: 2x RevPi Core via PiBridge
Replies: 8
Views: 1861

Re: 2x RevPi Core via PiBridge

Yes that is possible, there are some brief notes in the stretch 3/2019 release announcement (search for "PiBridge networking"). Basically you need to comment out piControl in /etc/modules, connect the two Cores with a PiBridge plug and boot them. They will assign themselves IP addresses in...
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