GP32 Building A Serial Cable...

[benjaminblasius@web.de]

hi, i tried just for fun to build a serial cable as described here: http://www.cs.helsinki.fi/u/jikorhon/conde...ocs.html#serial

but i'm not sure if i succeeded. i don't get the 3v output shown in the schematic.
somebody else built a serial cable?

and what can i do with a serial cable?
(as i said i only built it in the name of science)

 

[lek]

I presume you mean the 3.3v?

If you look at the schematic, its the 3.3v OUPUT of the GP32's EXT port that connects to the Vcc pin of the chip. i.e. The chip is being powered by the GP32.

So without fully connecting the circuit up to PC and GP32, the chip cannot work its voltage level manipulating magic.

 

[mr.spiv]

and what can i do with a serial cable?
(as i said i only built it in the name of science)

I use it e.g. to dump debug information from GP32 to a console screen in my OSX box.. There's also a serial version of GDBstub etc. More to come in the near future <_<

 

[nigelibrown]

We have had serial cables on the web site for a while? look under hardware - serial the reason they are more expensive than the chatboards is twofold. The cables and connectors they use are heavy duty. Secondly the 9way connector hides a custom PCB with links to convert between different serial protocols.

Nigel
Toyz 4 Boyz

 

[Squidge]

I wouldn't call whats basically a voltage converter different serial protocols (I'm assuming here the design is from Spiv and he's uses a MAX232 or a couple of transistors to switch between -/+10V and gnd/3v)

 

[Tristan]

I wouldn't call whats basically a voltage converter different serial protocols (I'm assuming here the design is from Spiv and he's uses a MAX232 or a couple of transistors to switch between -/+10V and gnd/3v)

MAX3222, but if he also has the handshaking signals, he might use a different chip. Though I doubt he has those...

 

[nigelibrown]

It uses the MAX3233 and other components, the design is ours! The different serial protocols it supports exist between our own products. If you want to criticise a design would probably be best if you were a little better informed. Perhaps you would like me to send you one?

Toyz 4 Boyz

 

[Squidge]

You can send me for review if you like, but I don't think I'll actually have any time to do anything with it. By all means feel free however.