Byte 2 ASCII

Hi @all, me again.

I have solved a lot of problems and now, I have a common question.
I want to send a paket, consisting of bytes (text, numbers, whatever the user wants) and do some processing around different classes, The objects of the classes are connected with each other with mailboxes.
But I'm not quite sure, which type I sall take for the paket, because I want to do things like data whitening and so on. Formerly I thougt, that the string-type would be the right tpye, but if you do string.getc(), it returns an integer, But I want to do processing bytewise and with the given context (device under test) I have to assume, that it must be bytes. Can you tell me, if I can ignore the 3 upper bytes and just take the lower bytes? Or is it better to take a dynamic array with the type byte?

Thanks for your help!
Sebastian

The user was allowed to choose the preamble himself. It consists of 8 Bit, so I have elected the byte-Type for this.



Be aware that "byte" is a signed 8-bits, so it is not same as bit [7:0].



For example, if the decimal value ist 48, there should be an zero, because 48 is zero in ASCII table.



SV has itoa(int) function for this. Look for it in LRM.

HTH
Ajeetha, CVC
www.noveldv.com

Hi Sebastian,
      As per LRM, string.getc() should return a byte and not integer. I'm not clear about your exact requirement, but to me it looks like your complicating the problem than what's really needed. Perhaps you want to use untyped mailbox? Not a great idea, but if it simplifies coding, why not? If you use a good methodology around SystemVerilog, then you get those fancy "channels" (be it: tlm_fifo/vmm_channel/OVM_) that are more powerful than mailboxes.

Cheers
Ajeetha, CVC
www.noveldv.com

I second that! As the laguage stands in itself, there are at least dozon way to achieve any given objective in SystemVerilog. And that is why methodology and class library is so important for SystemVerilog. So many of your "manangement" requirements can be handles by the class library. For example, in uRM/OVM, you would work on the abstract fields of a transacton as per your protocol and when you are done you can simple "pack" the whole transaction and pass it to the next block in the pipe using tlm channels.