rtems on raspberry pi 2 difficultys

William Kirstaedter kirstaedter at fhi-berlin.mpg.de
Mon Jul 17 13:11:29 UTC 2017

Thanks for the answer.

115200 8N1 is exactly what I am trying.

u-boot uses this setting too and is working properly.

William Kirstaedter (PP&B)
Fritz-Haber-Institut der MPG
Faradayweg 4-6
14195 Berlin
Tel: 030 8413 3154
Mail: kirstaedter at fhi-berlin.mpg.de

Am 17.07.2017 um 14:51 schrieb Andreas Kölbl:
> Hi,
> Am 17.07.2017 um 13:29 schrieb William Kirstaedter:
>> Hi @all,
>> I hope I am asking in the right mailing list.
>> This probably has already been asked, but I wasnt able to find
>> anything suiting my problem case.
>> I want to run RTEMS (and later on EPICS, but this shall not be part of
>> this request here) on my Raspberry Pi 2 B.
>> So I followed various guides on how to get RTEMS compiled for ARM /
>> raspberry pi, and got a seemingly successful build of RTEMS 4.12
>> including the sample programs.
>> I then made a binary out of the ticker.exe and copied it over onto my
>> boot partition of the SD card. neccessary proprietary broadcom
>> bootloader files are present.
>> Now when I try and turn the raspi on, it just shows the color splash
>> screen on HDMI and prints out unreadable, strange characters on UART
>> console. they are not always the same.
>> (I try to append an Image)
>> the same happens with hello.exe and the older RTEMS 4.11.
>> Normally the Raspberry should display readable status messages on UART
>> for approx. 35 seconds and then halt.
>> Maybe somebody here has an Idea whats the issue? Do I have to tell
>> RTEMS (somehow) what serial connection should be used and at what
>> speed it should operate? I am really new to RTEMS and therefore
>> missing even an Idea where to start searching.
>> Or should I ask in devel mailing list too?
> which baud rates did you try? The README file located in
> c/src/lib/libbsp/arm/raspberrypi/README states, you should be able to
> see output on PL011 UART0 at 115200 Baud and 8N1 encoding set to your
> console.
> E.g. /dev/ttyUSB0 is a serial to usb converter ->
> stty -F /dev/ttyUSB0 115200 cs8 -cstopb -parenb
> should fit.
>> Thanks in advance;
>> _______________________________________________
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>> users at rtems.org
>> http://lists.rtems.org/mailman/listinfo/users

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