Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Is there any virtual jtag C API functions?

Dear All, I am using Altera Virtual Jtag to develop my own debug tool on FPGA. I notice that on host PC, I have to write Tcl script and evaluated it through quartus_stp.exe shell prog...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

--- Quote Start ---

Virtual Jtag use sld_hapi.dll file, but it's API function is unkown.

--- Quote End ---

Yes, that's discussed in the said and other previous threads. JTAG UART is one of many virtual JTAG functions. The basic virtual JTAG interface is documented by Altera, but the interface in the Quartus JTAG stack (particularly sld_hapi.dll) isn't. Of course, this doesn't mean, that you can't use it, but it's not easy.

P.S.: My personal opinion in this regard is, Altera should officially undisclose a virtual JTAG API, because it's a strong Quartus feature that can be utilized as a competitive edge.