Hi all,
Christmas is closing so everybody is making presents. So is Xilinx. I just got mine! Read the story below:
*********************************************************************** ISE/EDK/ChipScope update to 6.3In attempt to get our EDK based SoC systems up and running again in EDK 6.3 I ended up creating simplest possible SoC using BSB (because none of working EDK 6.2 projects worked after update no matter any attempts to get them working). Attempted to debug in XMD: fatal disaster BRAM can be loaded from elf, can also look at the disassembly all is ok. Any attempt to trace or execute simplest program and all goes pasta, not any more possible to view (or write) even to LMB RAM ! Then I added ChipScope bus analyzer core to OPB bus. And simplified the test application. Here is the source code:
----------------------------------------------------------- // Xilinx Christmas Lights application ver 1.0 while (1) { i++; WriteToGPOutput(XPAR_LED_7SEGMENT_BASEADDR, i); }
----------------------------------------------------------- This is running in MicroBlaze SoC at system frequency 50MHz. Pretty much all leds should be lit, right? Or?
It looks like (due to Christmas feeling !?) Xilinx tools have decided for me that my application should be "Christmas Lights" - because that how it works! The LEDS are blinking in fancy true random fashion at "human" blink rate, ie very slowly. The visual effects are pretty cool, really!
When looking in ChipScope (OPB bus analyzer) I see writes to the GPIO port:
0x00800000, 0x01000000,0x02000000,0xFFFFFFE,0xFFFFFFC... Those are 5 example sequential writes to GPIO port (from the above program!), notice that between the GPIO writes there is always more than 512 OPB clocks of no OPB bus activity.And yes, I did UNINSTALL ALL ISE/EDK/ChipScope before update, then installed all the new versions plus service packs, etc..
***********************************************************************Antti