How can I enable HPS User Clock 2 in the Intel® Quartus® II software version 14.1?

Due to a problem in the Intel® Quartus® II software version 14.1, HPS User Clock 2 cannot be enabled from the HPS Megawizard in Qsys.

To work around this issue in the Intel® Quartus® II software version 14.1 follow the steps below:

To Enable HPS User Clock 2

1. Save your Qsys project, and exit Qsys
2. Open the .qsys file containing the HPS instance in a text editor <project Name>.qsys
3. Search for the parameter S2FCLK_USER2CLK_Enable, and set it to true
   <parameter name="S2FCLK_USER2CLK_Enable" value="true" />
4. Save the .qsys file
5. Open the project in Qsys and Generate the System

 Note: The steps above may need to be repeated if the HPS parameters are edited in Qsys.

To set the frequency of HPS User Clock 2

The frequency of HPS User Clock 2 must be manually set,  following the Preloader Custom Clocking flow as used for the Quartus II software 13.1 and earlier.   This flow updates the generated BSP handoff file software/<bsp name>/generated/pll_config.h

Please see the following Rocketboards page for more details: http://www.rocketboards.org/foswiki/Documentation/PreloaderClockingCustomization131

Then a clock constraint like the below should be added to any .sdc file. Make sure that the .sdc file should be sourced after the .qip file.

create_clock -period <HPS User Clock 2 period> [get_pins -compatibility_mode *|fpga_interfaces|clocks_resets|h2f_user2_clk]