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Altera_Forum
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12 years ago

Cyclone 4 Jtag - with VHDL

Hi,:(Hi, Can any one explain or give an example how to connect to Altera inside JTAG to be able to read values myself? Thanks, Roee
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Altera_Forum
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12 years ago

I don't have an example at hand, but you can instantiate a megawizard generated module or probably instantiate the primitive (cyclonev_jtag) directly. Then you need to generate the JTAG sequence to read it. If you don't have software to do this you can write an SVF to set the scan register to user1/user2.

Using the altsource_probe is probably the easiest way.