Embedded Processors and Peripherals

[rjmyers]

After discussion with my local Xilinx FAEs, I may be gaining access to a SP605 demo board.

Is  there any source examples (C code) that would take character input from a pc and echo it

back?

Being a newbie has its disadvantages at times...

-Bob

[austin]

Bob,

The FPGA is programmable logic, programmed in verilog, or VHDL.  If you want to echo a character, you can use a wire (from TX to RX).

Or, you can put two uarts in, and wire them back to back.

Or you can place a soft processor, and uarts, and then write a program to read uarts when they receive a character, and send it back.  Depending on the processor, there may or may not be a c complier (e.g. PicoBlaze has no gcc, and MicroBlaze does).

Austin

[rjmyers]

Hi;

Initially, I would like to generate a Microblaze system that would allow me to read in from the USB/UART and

then echo the character back via the USB/UART.  (Would have Hyperterm running on the PC).  I need to

demonstrate this ability first, then proceed to increasing  complexity by having the system accept

a command from the PC (echo it back to display on the PC's screen, if needed), interpret the command

and interact with the rest of the fpga (that does what it needs to do).

Putting on jumpers to run input to output won't demonstrate that I can get input and return it.

Thanks,

Bob

[austin]

http://www.xilinx.com/products/boards/v6embd/reference_designs.htm

[rjmyers]

The link you sent was for the Virtex 6 version of the board -- I am hoping to get

access to the Spartan 6 SP605 board.  I have downloaded the reference design zip file

and have started to look at some of the documentation that is available for it.

I have no knowledge of the AXI specs or IP at this time.

-Bob

[alaney]

The kit will come with most of this, but you can download it here as well..

http://www.xilinx.com/products/boards-and-kits/DK-S6-EMBD-G.htm

http://www.xilinx.com/products/boards/s6embd/reference_designs.htm

Here is the "SP605 Getting Started Guide"

http://www.xilinx.com/support/documentation/boards_and_kits/ug667_sp605_gsg_axi.pdf

[svenand]

I have written a blog on how to implement a MicroBlaze system on the SP605 board. You find it here: http://www.rte.se/blog/blogg-modesty-corex/benchmarking-microblaze

[svenand]

Here is the start of the blog: http://www.rte.se/blog/blogg-modesty-corex/microblaze-soft-processor