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Altera_Forum
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20 years ago

Nios board couldn't work with SignaltapII

hi: The board i use is nios pro stratix 1s40,when i program my sof file down to the FPGA, it just ok. but then i use signaltapII to debug my froject, the case is that it often reload the sof ...
Altera_Forum's avatar
Altera_Forum
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20 years ago

There is no problem using multiple JTAG devices (Nios II debug module, JTAG Uart, Signaltap II). Also there is no problem using an RS232 (Normal) Uart for terminal I/O.

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The board i use is nios pro stratix 1s40,i think something in signaltapII was set wrong like pins.[/b]

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Signal Tap II is non-intrusive so it doesn&#39;t require pins in most cases (you connect it to the internal logic).

I would check to make sure your sampling rate is defined correctly (remember that the signaltap II clock has to be at least twice as fast as the maximum data clocking rate you are sampling otherwise you will not collect data correctly (golden law of sampling)). Also make sure your trigger conditions are set up correctly.

Are you saying you see the heartbeat LED blinking with signaltap II present and it just doesn&#39;t sample data or adding it in breaks the entire design (i.e. no LED blinking)?