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I want to do this, but I get errors as soon as I make the connections. Is there a way to do this without going to external pins on the device?
The reasons for needing to do this are complicated, and stupid. Nevertheless, it's what someone is asking for, and I'm trying to accommodate.
Errors:
Solved! Go to Solution.
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Hi,
This was an interesting challenge!
At first I tried with single UART.
Directly connected tx_out and rx_in.
And could not generate application. (NG)
Then I tried it with SmartIO
Generate Application succeeded! (OK)
NOTE: This is the only case I had a success this morning. orz
Then as using SmartIO seemed to be promising,
I tried with two UARTs, using SmartIO's data ports only.
And Failed (NG)
Then I tried to use GPIO ports of SmartIO
And failed (NG)
Then I decided to go with UDB (and Verilog)
Failed. (NG)
Just in case, I added REG (and clock) in the Verilog component.
.. alas ... (NG)
So currently my conclusion is
(1) I can loop back a UART using SmartIO
(2) I can not loop back a couple of UARTs connected together.
moto
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Hi,
This was an interesting challenge!
At first I tried with single UART.
Directly connected tx_out and rx_in.
And could not generate application. (NG)
Then I tried it with SmartIO
Generate Application succeeded! (OK)
NOTE: This is the only case I had a success this morning. orz
Then as using SmartIO seemed to be promising,
I tried with two UARTs, using SmartIO's data ports only.
And Failed (NG)
Then I tried to use GPIO ports of SmartIO
And failed (NG)
Then I decided to go with UDB (and Verilog)
Failed. (NG)
Just in case, I added REG (and clock) in the Verilog component.
.. alas ... (NG)
So currently my conclusion is
(1) I can loop back a UART using SmartIO
(2) I can not loop back a couple of UARTs connected together.
moto
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Wow, thanks Motoo for trying all those different solutions!