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big problem with Philips PDS51 emulator

Started by djordj May 31, 2007
I can't connect to a PDS51 (with serial cable), the software says that 
there is no emulator connected to the COM port!!!

Is there anybody that knows this emulator?
I need help...

Thanks


On Thu, 31 May 2007 21:14:25 GMT, the renowned djordj
<djordj@despammed.com> wrote:

>I can't connect to a PDS51 (with serial cable), the software says that >there is no emulator connected to the COM port!!! > >Is there anybody that knows this emulator? >I need help... > >Thanks >
Works fine for me under Win2K. Try setting the com port and baud rate both to "auto".
Spehro Pefhany formulated on venerd&#2013265932; :

> Works fine for me under Win2K. Try setting the com port and baud rate > both to "auto".
Well... not so easy... I'0ve used it for a long time, since this afternoon. I ran PDS51 software and I can't estabilsh a connection with the emulator. I've taken the oscilloscope and I've found that I seed bit stream on the RX pin of the MAX3227E chip mounted on the PDS51 motherboard, but I can't see any bit on the TX pin... Moreover, I've seen that on pin 33 of the 8051 labelled as PDS51 v2.0 (opr something similar) on the motherboard ther is an ALE signal of 2.5Mhz (circa). If I check the same pin on the other 8051s mounted on the daughter board, I can't see no more "ALE like" signal. I don't know what to do....
On Thu, 31 May 2007 22:11:33 GMT, the renowned djordj
<djordj@despammed.com> wrote:

>Spehro Pefhany formulated on venerd&#2013265932; : > >> Works fine for me under Win2K. Try setting the com port and baud rate >> both to "auto". >Well... not so easy... >I'0ve used it for a long time, since this afternoon. >I ran PDS51 software and I can't estabilsh a connection with the >emulator. >I've taken the oscilloscope and I've found that I seed bit stream on >the RX pin of the MAX3227E chip mounted on the PDS51 motherboard, but I >can't see any bit on the TX pin... > >Moreover, I've seen that on pin 33 of the 8051 labelled as PDS51 v2.0 >(opr something similar) on the motherboard ther is an ALE signal of >2.5Mhz (circa). > >If I check the same pin on the other 8051s mounted on the daughter >board, I can't see no more "ALE like" signal. > >I don't know what to do....
Maybe the MAX chip is fried. I'd say the chances of that are fairly good- anything that connects to the outside world is vulnerable to some extent. Can you see the signal at the TX *input*? But, if your (commercial) development is stopped, and the problem isn't obvious, you should probably get another one airlifted to your lab post haste. They're not that expensive, IIRC. Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com
Spehro Pefhany wrote on 01/06/2007 :

> Maybe the MAX chip is fried. I'd say the chances of that are fairly > good- anything that connects to the outside world is vulnerable to > some extent. Can you see the signal at the TX *input*? But, if your > (commercial) development is stopped, and the problem isn't obvious, > you should probably get another one airlifted to your lab post haste. > They're not that expensive, IIRC.
I was thinking the same thing: the MAX's gone... But that's not true: even the TX pin on the 8051 is off.