De2-115 windows application to control Cyclone chip

Hi Dave,

While reading your PDF, I have more question:

When you write:

"The Virtual instruction register bus from the Virtual JTAG component was connected to GPIO

bits and to the LEDs (so that Tcl commands can change the LED state)."

This means that I have manually to connect the Virtual Jtag myself to LEDS ?

I guess you mean ir_out[2..0] ?

So I should connect it manually myself?

Also I did not understand how to change Directions - meaning the TDI generally is output of Altera, and just in JTAG mode turns to input? so how should I turn it to input?

Also in the timing diagram you mark TDI-ERROR (what would you expect there?)

When it is in JTAG mode - by TCL commands, this block get automatically clocks and data? (so I don't have to take care about toggling these pins correct?)

So if I have connected my leds correct and gave TCL commands I should see the leds lighting by my input to ir_in[2..0]?

When I connect in my block the ir_out[2..0] to LEDS on board I get an error "missing source signal" like this is input why?

how can I overcome this problem?

Thanks for your help,

When my blocks are ready I will share them to all here

Thanks,

Roee