ASIC/FPGA Design and Verification Out Source Services

A simple c-code program to read a memory array from verilog RTL, using VPI.

1. The former page discussed the simple verilog file, which served as the example's DUT. This one describes the c code, which reads a memory array from the verilog DUT.


2. This pages only explains how the read is done. The c code registration is discussed in other examples ( my first hello world: VPI, a sparse memory model: VPI ), which are also available on the site.


3. The c code gets the left and right addresses of the verilog array and starts a read loop.
   
   ...
     argh = vpi_scan(args_iter);
     argval.format = vpiIntVal;
     vpi_get_value(vpi_handle(vpiLeftRange, argh), &argval);
     left_addr = argval.value.integer;
     argval.format = vpiIntVal;
     vpi_get_value(vpi_handle(vpiRightRange, argh), &argval);
     right_addr = argval.value.integer;
   
     vpi_printf("the address range is %x %x\n", left_addr, right_addr);
     vpiHandle h3;
     s_vpi_value ar_da;
   
     for(ix_addr=left_addr; ix_addr <= right_addr; ix_addr++) {
       h3 = vpi_handle_by_index(argh, ix_addr);
       ar_da.format = vpiIntVal;
       vpi_get_value (h3, &ar_da);
       vpi_printf("the value is %d\n", ar_da.value.integer);
     }
   ...
   


4. Go to the next page to read the description on the compilation script and download the code.

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The usage of queues in C++ and discusses some motivation to implement it for verification environments.