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???
05/03/07 17:56
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 		 #138551 - C and bitstream
Responding to: ???'s previous message
2. Can the customer use readily available C compilers like Keil to program the CORE ROM as it was external 8052?

I once spoke with Keil, and they told me that there was a table of SFR addresses that could be modified to support additional peripherals. Since the core is a standard 8051, the compiled program should run.

3. If you generate a bitstream, can the user interface to it? Wouldn't it be better to generate vhdl/verilog code so that user interface to it easily using port mapping?

A bitstream protects my IP, since it is really tough to modify it. The main idea is to show prospective customers what a "custom" 8051 would be like before they bought one. Of course, if others wanted to try it out, that is fine too.

The choice of the FPGA is difficult. Most FPGAs do not support 5 volts, and barely support 3 volts. If I do this, I'll approach both Xilinx and Altera and see who is more willing to work with me. (work with = free software)


List of 31 messages in thread
TopicAuthorDate
Shameless attempt for marketing feedback            01/01/70 00:00      
   I cannot see where the sales would come from            01/01/70 00:00      
      Jez can\'t, I can            01/01/70 00:00      
         devices/boards rather than bitstream            01/01/70 00:00      
            DMA question            01/01/70 00:00      
               me?            01/01/70 00:00      
   when You start?            01/01/70 00:00      
   I think            01/01/70 00:00      
      C and bitstream            01/01/70 00:00      
         another question            01/01/70 00:00      
            Emulator            01/01/70 00:00      
               I would, or no sell            01/01/70 00:00      
                  throw away JTAG            01/01/70 00:00      
                     who cares how the emulator connects, the important            01/01/70 00:00      
                        the marketing dept. cares            01/01/70 00:00      
                           RTFM            01/01/70 00:00      
                              if you want to sell the chips...            01/01/70 00:00      
         Security            01/01/70 00:00      
            Reverse Engineering            01/01/70 00:00      
               If you're worried about IP ...            01/01/70 00:00      
                  the "experts"            01/01/70 00:00      
               Reverse engineering bitstreams            01/01/70 00:00      
            security of fpga designs is taken seriously            01/01/70 00:00      
   Well, what I'd go for ...            01/01/70 00:00      
   at least it keeps the honest people honest            01/01/70 00:00      
      This is where people misunderstand the difficulty            01/01/70 00:00      
         Now there IS nonvolatile storage            01/01/70 00:00      
            yes nonvolatile, but unaccessible            01/01/70 00:00      
               Is that a problem, Jan?            01/01/70 00:00      
                  this depends on the technology            01/01/70 00:00      
                     It's all one package ...            01/01/70 00:00      

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