Guest eddy Posted March 17, 2011 Report Share Posted March 17, 2011 Hello Jack and forum visitors, I'm very curious about this avr core. But in lack of any hardware I first tried a simulation of the core. It took me a will to get the simprim library working but eventually got a sign of life. This bring me to my first question. The core is executing the hardcoded pm_inst contents (program code space). But what is the intended functionality of the xpm8kx16.vhd? Is this on of the examples? My next step could be to make my own test program and replace the xpm8kx16.vhd contents. Is there also a ready to use tool for placing the winavr hex output into the xpm8kx16 vhdl file? An other question I have is about the JTAG functions. It is clear that the USB interface enables us to program the butterfly board. I assume that you mean that either the fpga or the SPI-FLASH-configurator can be programmed via JTAG. But is the AVR-JTAG interface also connected (chained) to this USB interface? I was not able to figure this out from the butterfly one schematic. This could enable JTAG debugging. Thanks in advance. Eddy Link to comment Share on other sites More sharing options...
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