Forum Discussion
Altera_Forum
Honored Contributor
8 years agoFirst off, you should not be using the push buttons as clocks. It will be a very bad signal and will bounce, giving you lots of edges on each press. Also, it will not be possible to do timing analysis, and the signal will vary with temperature. I dont actually see any clock usage in your processes.
I suggest you source a real clock from a crystal on the board or from a PLL on the chip (that will need a clock from a crystal). Second, unless you are using vhdl 2008, with..select is not allowed inside a process Finally - did you draw your circuit on paper before you wrote any code? VHDL is a hardware description language so unless you know what the circuit is you will not be able to write any HDL.