I am encountering very odd problems with my new Mini-ITX board. Whenever I make use of a significant portion of the PL resources, the PS just freezes.
I have done quite a lot of debugging on this, and the only thing that seems to affect this problem is the amount of resources used. I have a test design that does a lot of useless computations. If I allow Vivado to optimize away all the useless stuff and hence greatly reduce the resource usage, then the CPU does not freeze. If I prevent the optimization and use 56% LUTs, then the CPU freezes immediately.
There are no timing timing violations or other errors reported by Vivado. I have now come to a point where I suspect that my Zynq might actually be damaged.
I have created a set of boot files for reproducing this error on a Mini-ITX with Zynq 7100. The boot files can be downloaded here:
https://mega.nz/#F!9hF0kQrZ!RfGgoTnCO0QOtp6MSUFZxg
When booting this configuration, U-boot only manages to print a few lines on UART before the CPU stalls. Usually the output looks like this:
--------------
U-Boot 2015.07-dirty (Apr 09 2016 - 11:32:21 +0200)
Model: Zynq Mini-ITX Board
DRAM: ECC disabled 1 GiB
MMC: zynq_sdhci: 0
SF: Detected S25FL128S_64K with page size
--------------
Sometimes it even freezes before being able to print the first line. I would be really thankful if somebody could try out those boot files and report if this error also occurs on other Mini-ITX boards with Zynq 7100 SoCs.
Many thanks
