arty z7 problem running basic arty z7 example

[cotton]

I just received my Arty Z7!  I'm trying to get a basic example up and running.  Since there aren't any tutorials up yet on the Arty Z7 start page:

https://reference.digilentinc.com/reference/programmable-logic/arty-z7/start

so I tried to follow the "Getting Started with Zynq" example for the Zedboard:

https://reference.digilentinc.com/learn/programmable-logic/tutorials/zedboard-getting-started-with-zynq/start

I created the project using the Arty Z7 20 Vivado board files.  Everything went smoothly until I try run the code example (Launch on Hardware).  I get:

ERROR : Memory write error at 0x100000.  APB AP transaction error, DAP status f0000021

and the example fails to run.

From discussions of this error on the Xilinx forums, it sounds the DDR is possibly misconfigured.  I also tried to run the example out of OCM (ps7_ram_0/1), but got the same error with the address corresponding to OCM base address, so maybe the DDR isn't the problem.

Any ideas what I might be doing wrong?  Happy to provide more information if that would help.  Thanks!

[jpeyron]

Hi @cotton,

I am sorry to hear you are having issues. When did you download the board files? We have made changes to the Arty z7 board files within the last month or so. Do you have the mode , i believe its JP4 , selected for JTAG instead SD or QSPI . Are you able to run any of the projects on our github here? I will get one out of stock tomorrow and run through the tutorial. 

cheers,

Jon

[cotton]

Jon, thanks for the quick reply!  JP4 was the problem, it works like a charm now.  Thanks!