Hello everyone, I tried to write a testbench using configuration objects, but I am facing an error when I get the object in top_spi_tb_env. I read a lot of forum but I didn’t find the solution of this error. <a name="p-113701-i-activate-uvm_config_db_trace-and-see-that-the-set-is-working-then-when-the-get-is-called-in-top_env-it-is-working-too-i-have-the-right-value-here-are-the-lines-that-i-have-reporter-cfgdbset-configuration-uvm_test_topmy_spi_env_config-type-spi_env_config-set-by-uvm_test_top-spi_env_config-1" class="anchor" href="#p-113701-i-activate-uvm_config_db_trace-and-see-that-the-set-is-working-then-when-the-get-is-called-in-top_env-it-is-working-too-i-have-the-right-value-here-are-the-lines-that-i-have-reporter-cfgdbset-configuration-uvm_test_topmy_spi_env_config-type-spi_env_config-set-by-uvm_test_top-spi_env_config-1" aria-label="Heading link"> I activate +UVM_CONFIG_DB_TRACE and see that the “set” is working. Then when the “get” is…

In reply to ccelie : If the set()/get() calls work with an integer but not with a class variable, then the issue has to do with the class variables not being type compatible. This is due to compiling spi_env_config multiple times in different scopes. To fix this, you need to use a package and impor…

In reply to ccelie : Why did you set the configuration again in top_env? The line: uvm_config_db #(spi_env_config)::set(this, "*", "spi_env_config", my_spi_env_config); When you set the configuration in b_test with wildcard “*”, all child-components of b_test should be able to get it. Please rem…

I also think the same as chris! Please try it out and let us know. In reply to chris_le : In reply to ccelie : Why did you set the configuration again in top_env? The line: uvm_config_db #(spi_env_config)::set(this, "*", "spi_env_config", my_spi_env_config); When you set the configuration in…

The second set in top_env was just a test to try to get the new object “spi_env_config” in top_spi_env, but it didn’t work. I comment this line and I have the same error.

In reply to ccelie : What is spi_env_config ? You are declring a variable of this type, but you do not assign a value before performing the set to the config_db. If spi_env_config is a class then you are passing to the config_db ‘null’. This might cause errors when performing the get.

In reply to chr_sue : spi_env_config is a class described as follow : class spi_env_config extends uvm_object; `uvm_object_utils(spi_env_config) bit topcell_env=0; bit has_scbd=1; bit has_digital_env=1; bit active=1; spi_agent_config agent_config; function new(string n…

In reply to chr_sue : I use this my_spi_env_config=spi_env_config::type_id::create("spi_env_config"); in the build_phase to create the object. Must I do this in the constructor ?

In reply to ccelie : Sorry I did not recognize this. It is fine. Back to your issue. We see only a part of your code. Can you figure out from which get your error message comes from?

In reply to chr_sue : The error comes from this part : if (!uvm_config_db #(spi_env_config)::get( this,"", "my_spi_env_config", my_spi_env_config)) begin `uvm_fatal(get_type_name(),$psprintf("SPI not configured")) end in top_spi_tb_env. When I follow the config_db trace, I see that the…

In reply to cgales : Thank you cgales, it is working now. The issue was not exactly coming from the package and its importation, but I have an issue during the compilation. The class spi_env_config wasn’t correctly compiled. I thought that a compilation issue like that will come before I run the si…

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Issue with uvm_config_db set and get

UVM

chr_sue November 7, 2018, 10:14am 7

In reply to ccelie:

But you do not show this in your code for class b_test.