synthesis

Recent discussions show that it is still possible for the load_synthdefs function to raise an un-handled error if it is given the path to a SynthDef file instead of a directory of SynthDefs.

We should fix this by raising a more useful error that describes the problem in a clearer way.
I suggest adding something like the following line:

raise "The load_synthdefs function expects an 

Motivation

The .postf is a neat shortcut for posting a formatted string.

But personally I see my self doing things like "% is not implemented yet".format("something").warn and the equivalent with .error all the time.

Description of Proposed Feature

Add the following methods to String:

// Equivalent to .postf
St

Tuo Xie requested the ability to visualize clocking (pins & wires I believe). We should make it easier to visualize subsets of the device routing resource and types of routing nets.

Proposed Behaviour

Add filtering to the rr_nodes displayed (ToggleRR), and to the nets displayed (ToggleNets). I think we should have an option to filter what is shown by node type, node name (segment or pin t

During the work on merging #1419 I figured out that the basic BUFGMUX example works differently on Arty Board and Nexys Video.

The example uses three LEDs:

• led[2] - blinks with slow frequency
• led[1] - blinks with high frequency
• led[0] - blinks with the same frequency as led[2] or led[1] depending on sw[0] state.

On the Arty Board, the example works as intended. On Nexys Video, when