Hello, I have a customer who bought one of my Universal Stepper Controllers, that uses the EPP mode on the parallel port for communication. He is not getting any response from the board. I've gone through the usual tests with him, and so far have not made any progress. One thing he mentioned is :
"I tried both addresses e000 and e010 (e010 must be correct), clearing out all the parallel port modules (parport.ko is necessary, else there are undefined symbols while loading hal_ppmc.ko)" I'm thinking that rmmod'ing the various parallel port modules may prevent the parallel port from working at all. I think I've seen this on other systems. Does anybody recognize the undefined symbols problem when loading a kernel module that uses the parallel port? (hal_ppmc uses inb and outb instructions to manipulate the parport registers directly. It uses something that Jeff Epler set up to put the port into EPP mode, using the info left in the BIOS data block by PCI enumeration to find the address of the ECR.) The customer's parport is PCIe, but we have already verified these seem to work just like the old PCI. Thanks in advance for any ideas. Jon ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785471&iu=/4140 _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
