> Hi John: > > Could you tell me where is the snap block? Is it a customized block?
They are in the CASPER DSP Blockset/Scopes folder. John > > Thanks > > Wan > > > -----Original Message----- > From: John Ford [mailto:[email protected]] > Sent: Saturday, 8 November 2008 12:33 AM > To: Cheng, Wan (ATNF, Marsfield) > Cc: [email protected] > Subject: Re: [casper] Question on control software on the ROACH > >> Hi all: >> >> I just could not find any documents in casper web site talking about the >> control software running in the PowerPC. >> >> So my first question is how can I use the interface between FPGA and >> PowerPC? For example, how can I design a block memory which can be >> written >> by ADC module and can be read by PowerPC? > > You use the yellow blocks. They have built-in software modules that get > loaded into the tinyshell running on the board. For more info, build the > ibob flashing-lights tutorial, then use bee_xps to build it. Then look > through the directories created by the build process. You will see C code > that has been set up and linked into the shell for you to access. On an > ibob, you can use either a direct serial cable or, if you include the lwip > block, a telnet interface to the shell. The software register block is > another yellow block used to directly get or set a register in the FPGA > fabric. > > I highly recommend spending the time to go through all the video lectures > for an overview of all the tools. > > > For your specific example request, use the ADC block --> shared BRAMS, > which you can then read with the PPC. You'll need an address counter, and > a bit to arm/reset the counter. See the snap block for an example from > the library. (You could also just use a snap block on each ADC output...) > > >> The second question is there are only external PowerPC on the ROACH. So >> the PowerPC firmware can not be loaded by FPGA bitstream. So how the >> PowerPC firmware will be loaded in the ROACH? How the software will be >> customized according the FPGA configuration? > > Excellent question! I'd like to know this, too, but I think it will just > work, like the rest of the system does now... > >> >> The third question is I can not find ROACH software fold. Anybody could >> tell me when it could be available? > > It will be done soon, I think. But it's not yet released! It will be > supported under the 10.1 Xilinx tool release. > > John > >> >> Thanks >> >> Wan >> > > >
