SCC2 and SCC3 serial ports on RPX Classic (MPC860)

[Dmitriy.Zavin at infineon.com]

>Is this string sent by a program loaded via insmod and busybox?
>
>I had a problem with drivers loaded as modules when using
>busybox.  The wrong strings would be sent when I did printk.
>It drove me nuts for days.  I installed the true version of
>insmod and all worked fine.

This is using busybox, but no modules have been loaded. SCC Uart support was built-in to the kernel.

I also took a look at the hex values that I actually receive and it does NOT look like the bit-string is offset by any bits. There's no direct mapping that I can see..

Thanks.

--Dima

>
>Maybe it helps,
>
>Chuck
>
>>>> <Dmitriy.Zavin at infineon.com> 03/26/03 04:11PM >>>
>
>Wolfgang,
>
>What I mean by "not random" is this:
>I write a string to /dev/tts/1, which will cause another
>string to be printed on the remote console. If I repeat this
>50 times, the same messed up string will appear.
>
>Thanks.
>
>I hope that answers the question.
>
>--Dima
>
>>In message
>><FD90897E35ABD311AE0E0008C7E6404A07192EDE at ca02exch4.sjc.infineo
>>n.com> you wrote:
>>>
>>> I compiled the 2.4.7 kernel (from TimeSYS) with SCC2 and
>>SCC3 enabled for IO. I have a break-out board where I manually
>>hook into the TXD/RXD/GND pins (Port A, pins 12/13). Now, I'm
>>sending a pattern (FOOOOOO) from the SBC to /dev/tts/1 (SCC2) which is
>>> connected to a windows box on COM1. All I get on COM1 is
>>garbage. But its not random. I made sure to set all the
>>baud/stop bits/parity manually through IOCTL calls to make
>>sure its right, but still no go. And SCC3 (/dev/tts/2) is
>>completely unresponsive
>>
>>What exactly do you mean with "garbage, but not completely random"?
>>
>>Is it the ordinary type of "line noise" as you get when the baud rate
>>is wrong, or do you get  valid  characters,  but  only  every  second
>>character  gets  output?  If  you  get  every  second character, this
>>usually means that your console port is misconfigured.
>>
>>Best regards,
>>
>>Wolfgang Denk
>>
>>--
>>Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
>>Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
>>Always try to do things in chronological order; it's  less  confusing
>>that way.
>>
>


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/