Re: [ts-7000] Re: Missing characters in Serial I/P

["Donal O'Connor" <>]

Hi Again,

Sorry about the wrong paste there. Here is the output from the TS7390:

ts7000:/home/eclipse/serialtest# ./DlpTempG

Ports available:  ttyS3 ttyS2 ttyS1 ttyS0 ttyUSB0 ttyAM2 ttyAM1 ttyAM0

*** Press Ctrl-C to stop ***

1-1-70 00:30:08    S1 temperature    C: -0.50    F: 31.10
An unhandled exception occurred at $0001AB14 :
ESynaSerError : Communication error 9997: Timeout during operation
  $0001AB14
  $00018198
  $00018290
  $0000849C

When I run the DlpTempGSim on the PC, it times out after about 15 seconds anyways regardless, surely this should stay running.

I edited the pass files of both the program and sim and removed the exit statement since as far as I could see it would always exit anyways and set the device to /dev/ttyUSB0 on both which are both the Usb->Serial adaptors.

I ran a dmesg on the TS7390 and the output doesn't look very nice:

ep93xx-ohci ep93xx-ohci: urb c16d9800 path 3 ep3in 6c160000 cc 6 --> status -71
ep93xx-ohci ep93xx-ohci: urb c16d9800 path 3 ep3in 6c160000 cc 6 --> status -71
ep93xx-ohci ep93xx-ohci: urb c16d9800 path 3 ep3in 6c160000 cc 6 --> status -71
ep93xx-ohci ep93xx-ohci: urb c16d9800 path 3 ep3in 6c160000 cc 6 --> status -71
ep93xx-ohci ep93xx-ohci: urb c16d9800 path 3 ep3in 6c160000 cc 6 --> status -71

From what I could find on google, this is the USB host controller interface. 

This is the USB->Serial converter on the ts7390:
http://www.usr.com/support/product-template.asp?prod=5700

I will try the other suggestion there with ser2net later on the day.

Thanks very much.


Regards,
Donal

On Tue, Mar 24, 2009 at 10:05 PM, Paul Breneman <> wrote:

I have those serial programs purposely configured so they should crash
if they miss any characters. I just tried them again and at the program
default of 9600 baud it is all working well. I even started up Dillo on
my TS-TPC-7390 and browsed to a couple of web pages and it still didn't
miss any characters.

I'm using the IOGear GUC232A USB to serial adapter. My adapter has the
pl2302 chipset (per dmesg) but be warned that adapter manufacturers have
been known to keep the same model number while switching to a completely
different chipset.

I tried FTDI and moschip adapters but the default drivers for those on
the TS-7390 seem to have bugs that cause crashes when you use RTS or
DTR. The prolific pl2303 works with RTS & DTR. I'm not sure if the
later pl2303X chipset works or not.

Let me know if I can test anything on my TS-7390 to help you
troubleshoot this.

Paul Breneman wrote:
> Hi Donal,
>
> It seems your cut-and-paste did not work for the dump from the TS-7390
> as it is a copy of your desktop dump.
>
> If you could get the correct one we might be able to see which end
> missed a character.
>
> I've run those programs without a problem so it does seem like your
> TS-7390 is what is at fault for some reason.
>
> Paul
>
>
> Donal O'Connor wrote:
>> Hi Guys,
>>
>> I am really sorry about the delay back, so busy with other college
>> stuff and
>> I got a bit sick there for a while.
>>
>> I am still experiencing this problem with the serial I/O.
>>
>> I have:
>>
>> - Moved to NAND flash
>> - Set the thread priority of the serial comm to time critical (QT)
>>
>> I am still getting the problem where I miss a character, the important
>> one
>> '>'
>>
>> I don't know if this is a problem of my own programming but since it
>> works
>> perfectly on my desktop machine, something has to be up.
>>
>> I have download the Serial testing program at:
>> http://www.turbocontrol.com/simpleserial.htm
>>
>> I run the *DlpTempGSim* program on my x86 development machine on
>> (/dev/ttyUSB0) where my usb->serial converter plugged in.
>>
>> I then have a null modem cable to my ARM device which is connected to
>> another usb->serial converter at same address, /dev/ttyUSB0.
>>
>> I run the *DlpTempG* program on this and I get interesting results.
>>
>> Output from Simulator on my development machine:
>>
>> :~/Desktop/Downloads/serialtestx86$ ./DlpTempGSim
>>
>> Ports available: ttyS3 ttyS2 ttyS1 ttyS0 ttyUSB0
>>
>> *** Press Ctrl-C to stop ***
>>
>> 24-3-09 17:23:19 sent response
>> 24-3-09 17:23:20 sent response
>> An unhandled exception occurred at $08062F2D :
>> ESynaSerError : Communication error 9997: Timeout during operation
>> $08062F2D
>> $080612B4
>> $0806136D
>> $08048225*
>>
>> Output from the program on the ts7390:
>>
>> :~/Desktop/Downloads/serialtestx86$ ./DlpTempGSim
>>
>> Ports available: ttyS3 ttyS2 ttyS1 ttyS0 ttyUSB0
>>
>> *** Press Ctrl-C to stop ***
>>
>> 24-3-09 17:23:19 sent response
>> 24-3-09 17:23:20 sent response
>> An unhandled exception occurred at $08062F2D :
>> ESynaSerError : Communication error 9997: Timeout during operation
>> $08062F2D
>> $080612B4
>> $0806136D
>> $08048225
>> *
>>
>> Now the two of them seem to be communicating but after a few seconds it
>> crashes.
>>
>>
>> Anyone have any ideas or pointers? - Should I try another driver? If so
>> which one.
>>
>> Hope someone can help.
>>
>> Thanks very much.
>>
>> Regards,
>> Donal
>>
>> On Wed, Feb 25, 2009 at 1:16 PM, Matthew Harrell <
>> lists-keyword-yahoo.fd265e%40bittwiddlers.com> wrote:
>>
>>> > From working on a 2.6.27 port of the SD card stuff, I've found a
>>> couple
>>>> bugs in the sdcard driver (and I know that a few remain). The one
>>>> you're experiencing is due to the fact that the driver enters atomic
>>>> mode (unnecessarily) while transferring data to/from the sdcard.
>>>>
>>>> Even when I release the atomic mode, the sdcard performance is about
>>>> 87k/second on a ts7400 and requires 100% cpu load, even after I got rid
>>>> of the while (!(DMA_READ(STATUS) & 0x40)) ; busy wait.
>>>>
>>>> What is more interesting is that their 2.4 driver does about 1.3
>>>> megabytes per second running under linux 2.4.
>>> Interesting. Does this problem occur only when you're writing to the
>>> card or does it also happen periodically when the system writes
>>> something
>>> to the card?
>>>
>>> Do you have a version of your driver I can experiment with?
>>>
>>> --
>>> Matthew Harrell Another Month's End:
>>> Bit Twiddlers, Inc. All Targets Met
>>> mharrell%40bittwiddlers.com <mharrell%40bittwiddlers.com> All Systems
>>> Working
>>> All Customers Satisfied
>>> All Staff Enthusiastic
>>> All Pigs Fed And Ready To Fly
>>>
>>>
>>
>
>

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