using 24mhz on board oscillator clock on bemicro CV board

Hi Guys

Thanks for your replies

I have checked in the pin planner and the clk pin was indeed routed to pin_M9

I have declared the following constraint in the qsys file

set_location_assignment PIN_M9 -to clk

set_instance_assignment -name IO_STANDARD "3.3-V LVCMOS" -to clk

The code is written in verilog. It is a simple I2C master.

However when I tried changing the clock pin to a header pin and I passed an external clock it started working .

But it is extremely noisy and hence I still want to use the on board oscillator clock.