Quartus allows redundant overloaded functions in VHDL without a compiler error ??

Hi James,

I'm not sure why Quartus doesn't throw an error. May I know which version of Quartus you're using?

Regards,

Nurina

Nurina,

I am using Quartus Prime Standard Edition 20.1.1 Build 720 with Patches Installed 1.08std, 1.02i running on Windows 10 primarily but also on Ubuntu.

Thanks,

James

James, can you provide a small Quartus design which shows that it doesn't throw an error?

Thanks,

Nurina

Hi James, any updates?

Hi James,

Any updates? If you could upload the design soon we can help you. Otherwise we will be unable to support you.

Regards,

Nurina

Will post the example today. Thanks. James

Nurina,

I have posted an example design with the VHDL overloading issue to github here:

https://github.com/saturn77/monitorX

What I did to illustrate the issue:

Nios does the following:

1. Writes a value to an output register
2. This register is then converted to signed, unsigned, and std_logic_vector type
3. The VHDL overloaded "bits" function is then applied to these three signals
4. Nios then reads these signals back in along with the original value written

Now what I found was interesting, that the values agree to their types. This is in contrast to my cyclone V design where the values are disagreeing with each other; it seems to be at reset.

However, the fundamental issue remains as to whether Quartus should throw a compiler error to VHDL overloading functions without unique signature, and the project on github does indeed show that Quartus allows these non-unique argument signatures to be compiled.

Thanks,

James

Nurina,

I am wondering if you had a chance to run the example design that I posted on GitHub of the overloaded VHDL example. Thanks. James

Hi James,

Apologies on the late response. I'm getting the below error:

Error (10481): VHDL Use Clause error at pwm_gen_fsm.vhd(4): design library "work" does not contain primary unit "Basic_Data_Types". Verify that the primary unit exists in the library and has been successfully compiled.

I think it's because the file "../source/Basic_Data_Types.vhd" is missing. Can you make sure to include that file in the github?

Regards,

Nurina