$sformatf

[hvgbl]

Hello all,

Sorry for stupid question.

 

I have my registers defined as, reg1, reg2, reg3.....................reg64.

Now i want to drive a single value (ZERO) to all register using for loop.

 

so i implemented,

 

for (integer i = 0; i<65; i = i+1);

des_data[0:7] = 8'h00;

block_obj.$sformatf("reg%0d",i).write(status, des_data, UVM_FRONTDOOR,.parent(this));

 

But i am unable to achieve so.

Any one else can suggest alternate solution or logic for the above problem ??

[tudor.timi]

You can't do this. What you're trying to do is meta-programming. The "for" and $sformat won't expand at compile time. if you want to loop over all registers in a block, you need to use the get_registers(...) method. Pseudocode:

 

uvm_reg  my_regs[$];

my_block.get_registers(my_regs); // now 'my_regs' will contain all of the registers

 

// loop over all elements in queue

foreach (my_regs)

  my_regs.write(....);

[hvgbl]

When i used following logic.

 

uvm_reg my_reg[$];

 

block_obj.get_registers(my_reg);

 

foreach(my_reg)

my_reg.write (status, des_data, UVM_FRONTDOOR, this);

 

 

I get following warning and error.

 

Warning: Register block_obj.reg1 is not contained with in map 'my_r_seq' (called from write()).

Error: No transactor available to physically access registers on map 'my_r_seq'.

[hvgbl]

Done . 

In my write method i havnt declared him the parent.

 

my_reg.write (status, des_data, UVM_FRONTDOOR, .parent(this));