How do I reset a Stratix IV Dev. board via system console?

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I.e., rather than press the button on the board, I want to send a TCL command to cause a reset.

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The JTAG-to-Avalon-MM bridge has a reset_request output that you can use as a reset input to your logic. Its discussed in this tutorial

http://www.alterawiki.com/wiki/using_the_usb-blaster_as_an_sopc/qsys_avalon-mm_master_tutorial

I'm pretty sure I just tied it to an LED in the tutorial, but you can use it as a reset source in a real design.

Cheers,

Dave

I assume you mean..

# Print the list of JTAG commands (commands prefixed with jtag)

tcl> info commands jtag*

jtag idcode jtag pulse nconfig jtag read jtag node id jtag node is bytestream

jtag open jtag resetrequest jtag write jtag node is master jtag send

jtag print hub info jtag close jtag usercode jtag print node info

jtag number of nodes

?

thanks

/j

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I assume you mean..

# Print the list of JTAG commands (commands prefixed with jtag)

tcl> info commands jtag*

jtag idcode jtag pulse nconfig jtag read jtag node id jtag node is bytestream

jtag open jtag resetrequest jtag write jtag node is master jtag send

jtag print hub info jtag close jtag usercode jtag print node info

jtag number of nodes

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Yep, that's the software API to toggle it. You can also issue JTAG low-level commands to get to the register that toggles it. The protocol and testbenches are here

http://www.ovro.caltech.edu/~dwh/correlator/pdf/altera_jtag_to_avalon_analysis.pdf

http://www.ovro.caltech.edu/~dwh/correlator/pdf/altera_jtag_to_avalon_analysis.zip

I'm pretty sure the Tcl script with one of those tutorials has a command that toggles the reset line - it may use the jtag resetrequest command directly.

Cheers,

Dave

thanks Dave

/j