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Unclear synthesis message

ymiler
Employee
1,448 Views

Hi

 

My Quartus Prime pro version is 22.3

I get no clear error message in Analysis & Synthesis step :

 

The following tri-state nodes are fed by constants : The node 
; 13032:13033 ; ; The following tri-state nodes are fed by constants : The node "scp_fpga_instance_wrapper_inst|cnvi_top|cnv_hip_wrapper_inst_0|cnv_hip_inst|n1" is fed by VCC 
; 13032:13033 ; ;The following tri-state nodes are fed by constants : The node "scp_fpga_instance_wrapper_inst|cnvi_top|cnv_hip_wrapper_inst_0|cnv_hip_inst|n1" is fed by GND

 

 

The following tri-state nodes are fed by constants
Warning (13033): The node "scp_fpga_instance_wrapper_inst|cnvi_top|cnv_hip_wrapper_inst_0|cnv_hip_inst|n1" is fed by VCC
Warning (13033): The node "scp_fpga_instance_wrapper_inst|cnvi_top|cnv_hip_wrapper_inst_0|cnv_hip_inst|n1" is fed by GND

 

When I try to investigate it I don't find any "n1" signal in this hierarchy 

 

please advise. 

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FvM
Honored Contributor II
1,415 Views
Hi,
look sharp, it's no error, just a warning. The connection may be intentional.

If you don't find n1, you should at least be able to locate cnv_hip_inst in RTL or post synthesis netlist.
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ymiler
Employee
1,399 Views

Hi

 

I forgot to add that finally there was error following to the warnings: 

 

Error(13076): The node "scp_fpga_instance_wrapper_inst|cnvi_top|cnv_hip_wrapper_inst_0|cnv_hip_inst|n1" has multiple drivers.
Error(20073): "constant VCC" is one of the multiple drivers.
Error(20073): "constant GND" is one of the multiple drivers.

 

Indeed, I can find the cnv_hip_inst instance in the RTL , but if I can't find n1 I don't have any clue how solve/understand the issue. 

 

 

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SyafieqS
Employee
1,299 Views

Have you able to locate the node? and then cross probe to rtl?


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ymiler
Employee
1,259 Views

I found the issue, there were two assignments to same wire ( 1 in RTL and the other through XMR )

 

Quartus message was unclear - the node had a different name then Quartus indicated.

 

 

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SyafieqS
Employee
1,117 Views

Are you able to solve this issue?



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ymiler
Employee
1,011 Views

Yes

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