How to make working xc161cj uP with printer port wiggler on high speed PC? Board alone work fine, but OCDS not. PC is Athlon 2500. Please tell mi if anyone have experience. I spend tens of hours with experiments, with no success. OCDS signals viewed with oscilloscope is clear and well shaped.
Hi Gyoergy, I got some problems, if I had parallel port drivers from different providers installed. That slows down my connection and some times I lost the connection sporadic. This costs me 2 days to found out. After deactivate the second parralel port driver ( from an emulator ) the connection was stable. Than for the starterborad the DIP-switch settings are important. At the beginning I take some wrong and was wondering that nothing was working with the correct signals. Another hint in this forum regards the crystal. The best results you will get with 8 MHz. If you built a own wiggler, check carefully the resistors and the level, that is a important influence. A very rare point is, that we had e.g. starterboard, where the pins were not properly soldered. This kind you would not discover so easy, because normaly you would not think in this direction. At least, I got the info, that sometimes with WinXP some troubles occur. But I saw a also XP run with 2500 on high speed after exchange the crystal. Hope one of the hints can help you best regards Stefan
Stefan, thank you for suggestions! Problem is solved: Pin 13 on printer port must be grounded! As seen inteface is not speed depenent, but depend on inplementation of printer port.
Hi Gyoergy, thanks for feedback. A good hint for next high speed troubles to solve. Stefan