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Altera_Forum's avatar
Altera_Forum
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10 years ago

Connecting 2nd Jtag2AVM to f2h_axi_slave causes system console to hang up

Hi,

I'm trying to create my first HPS system on a C5 Soc board from Terasic.

If I create a system with one JTAG2AVM bridge (called fpga_console in picture qsys_causing_no_error.png) I can run the script shown below, and the leds lit according to the number writen. 


set jtag_master  0]
open_service master $jtag_master
master_write_8 $jtag_master 0x00010040 1
master_write_8 $jtag_master 0x00010040 2
master_write_8 $jtag_master 0x00010040 3
master_write_8 $jtag_master 0x00010040 4
close_service master $jtag_master

The documentation that I follow from Terasic however tells me that I need to add a second JTAG2AVM Bridge and connect that one up to the f2h_axi_slave (called hps_console in picture qsys_causing_error.png)

When I do this and try to run the script above again, system consoles timesout with an error (see system_console_error_message.png).

I don't understand that this connection, has influence on the fpga_console, that it not connected at all to the HPS or the hps_console.

Any advice?

Is this connection putting the HPS in reset perhaps?

Rgds,

Kimberley

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    The problem is solved (with help from Terasic).

    As I insert another JTAG2AVM bridge, my jtag_master in the script above is not anymore on index 0, but index 1

    So when I change the first line into: 

    
set jtag_master  1]

    the scripts works.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    My friend solved the other two problems.

    She did redo everything I did.

    She started from scratch and did do only what the manual said.

    Apparently I did something wrong (still haven't found what)

    The other thing I would like to mention, is that the f2h_axi_slave doesn't work, when the HPS is not loaded with a PRELOADER configuration.

    As soon as that is done, the HPS has clocks and is out of reset.

    And then you can access the LEDS's and BUTTONS trough the f2h_axi slave interface by the HPS-JTAG2AVM bridge.