Forum Discussion

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

Program device seems no response in signaltap after changing source code

Initially, I could program .sof file & run signaltap without any problem. I tried to alter the source codes like adding a new signal & output port. After that, I recompiled my design. Then, I opened ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

A common mistake is to download a different *.sof file or a same-name file from a different directory. Another possibility is, that your hardware causes a configuration request and deletes the JTAG-loaded configuration. This can e.g. happen, if a connected AS configuration device doesn't contain a valid configuration. The on-chip configuration controller should be disabled by a Quartus programmer option in this case.