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by Flitzpiepe
Sat May 19, 2012 12:04 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Stackable communication modul
Replies: 2
Views: 2388

Re: Stackable communication modul

There are quite a few expansion board ideas about see http://elinux.org/RPi_Expansion_Boards all are welcome, especially open designs. Thank you for the link! But as far as i see - no full featured RS232 is there - but i will have a more decent look into it later on :) As stated out, these designs ...
by Flitzpiepe
Sat May 19, 2012 11:39 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Stackable communication modul
Replies: 2
Views: 2388

Stackable communication modul

Hi folks, i just want to present my plans for R-Pi. I want to bring up some little stackable expansion boards giving you the chance to communicate via several protocolls (RS232-full, RS485/RS422, etc). I already build some demo boards for RS232 full-featured (with sideband and flow control) and am w...
by Flitzpiepe
Fri May 18, 2012 1:50 pm
Forum: Troubleshooting
Topic: Compiling Kernal Module
Replies: 7
Views: 2179

Re: Compiling Kernal Module

Hi, I have got to a point now where i can finally compile a module on my pi, but i am getting an error when trying to load it. This is the output when i do a make: make -C /lib/modules/3.1.9+/build M= modules make[1]: Entering directory `/lib/modules/3.1.9+/build' CHK include/linux/version.h CHK in...
by Flitzpiepe
Fri May 18, 2012 12:33 pm
Forum: Troubleshooting
Topic: Pi naughtily leeching power...
Replies: 13
Views: 2999

Re: Pi naughtily leeching power...

We had had more reports like this. ("When I plug in the HUB my 5V in the Raspberry-Pi increases"). In principle the HUB should NOT output power on the slave port. But it seems a lot of HUBs still do so. Even the diode is wrong. Basically a USB slave port should only take power, it should never prov...
by Flitzpiepe
Fri May 18, 2012 10:04 am
Forum: Troubleshooting
Topic: Pi naughtily leeching power...
Replies: 13
Views: 2999

Re: Pi naughtily leeching power...

So, to get the Pi and my USB HDD to be friends at power off, would the USB connection still work if I sever the power connection but leave data lines intact?w Only kill the +5V - GND should keep connected. But i suggest on the long run it should be fixed in hardware with diode or fet switch. Rgds J...
by Flitzpiepe
Thu May 17, 2012 11:04 pm
Forum: Troubleshooting
Topic: Automatic display detection API
Replies: 2
Views: 995

Re: Automatic display detection API

You mean hotplug support - i think this would be very helpful ... As far as i see HDMI_HPD_P is connected to GPIO46 - so hardware is fine so far. What have to be done is to reprogram graphic driver to watch the INT on this GPIO and than read out EDID data from monitor - in theory it is simple, in re...
by Flitzpiepe
Thu May 17, 2012 10:15 pm
Forum: Troubleshooting
Topic: Compiling Kernal Module
Replies: 7
Views: 2179

Re: Compiling Kernal Module

Hi Luke,

can you post how you managed to compile a kernel modul? i am at this stage and cannot get further due to errors ...

I wrote my problems down here
http://www.raspberrypi.org/phpBB3/viewt ... f=6&t=6060

Rgds,

Jonas
by Flitzpiepe
Thu May 17, 2012 6:53 pm
Forum: Troubleshooting
Topic: Need help creating kernel driver
Replies: 0
Views: 926

Need help creating kernel driver

Hello folks, i want to build a kernel modul supporting full RS232 using GPIOs for the sideband/flow control signals. Using this HowTo http://tldp.org/LDP/lkmpg/2.6/html/x181.html, i tried to compile the first demo modul out of this howto but i fail - and thats the point where i do appreciate some he...

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