With Ultra96 v1, the output of the low-speed expansion connector is not output.

Question

Hello.

Although it measured with the oscilloscope, it is all 0V.

Is power supply required other than the main power supply?

mizuho · Answer

Hi, Bryan. Thank you for your reply.

I / O control is performed as follows.

OUT_SYNC_0 is connected by “Make External” from a self-made RTL circuit.

The behavior simulation can monitor the output.

== block design ==

== design source (TOP) ==

module design_1_wrapper

(OUT_SYNC_0);

output [3: 0] OUT_SYNC_0;

wire [3: 0] OUT_SYNC_0;

design_1 design_1_i

(.OUT_SYNC_0 (OUT_SYNC_0));

endmodule

== constrain source ==

set_property PACKAGE_PIN D7 [get_ports {OUT_SYNC_0 [0]}]

set_property PACKAGE_PIN F8 [get_ports {OUT_SYNC_0 [1]}]

set_property PACKAGE_PIN F7 [get_ports {OUT_SYNC_0 [2]}]

set_property PACKAGE_PIN G7 [get_ports {OUT_SYNC_0 [3]}]

set_property IOSTANDARD LVCMOS18 [get_ports {OUT_SYNC_0 [3]}]

set_property IOSTANDARD LVCMOS18 [get_ports {OUT_SYNC_0 [2]}]

set_property IOSTANDARD LVCMOS18 [get_ports {OUT_SYNC_0 [1]}]

set_property IOSTANDARD LVCMOS18 [get_ports {OUT_SYNC_0 [0]}]

bhfletcher · Answer

The main power supply is all that is required to drive the I/Os from the MPSoC that feed the LS expansion connector. How are you controlling those I/Os? Bryan

bhfletcher · Answer

I'm wondering if you should try something simpler, like a GPIO, just to get started. We did some test code for the Click Mezzanine that toggles all the LEDs on the Tester Click --

https://www.mikroe.com/tester-click

It's a bare metal design that simply toggles all the various LEDs that are tied to PS and PL pins. Would that be useful to share?

Bryan

With Ultra96 v1, the output of the low-speed expansion connector is not output.

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