Hi: Thanks Andrew. Any anyone know how we could use these matlab script files? Are they linked to simulink automatically or we have to use them during the library development manually?
Thanks Wan ________________________________ From: Andrew Martens [mailto:[email protected]] Sent: Thursday, 20 November 2008 6:22 PM To: Cheng, Wan (ATNF, Marsfield) Cc: [email protected] Subject: Re: [casper] Casper 10.1 library issue Hi Wan The directories in the toolflow are basically as follows; casper_library - DSP related scripts and libraries. xps_lib - contains the base EDK projects for the various hardware platforms. These are copied and modified by the Matlab scripts according to your design. xps_library - contains the Matlab scripts used to compile your design, copy the base EDK project from xps_lib, modify it according to your design, insert your design into the EDK project and synthesise and place-and-route the finished design. These scripts also set up and compile the software for the board. You may want to look at gen_xps_files.m where you can follow the route this process takes. I don't know the full answer to your second question but you can make System Generator generate HDL instead of a core. System Generator internally must associate each block with HDL and parameters which it uses to generate the final design. The best would be to look in the documentation or on the web. Hope this helps. The best way to get to know the toolchain is to dive in and try to figure it out yourself, you will soon get a good idea of what is happening. Cheers Andrew 2008/11/20 <[email protected]> Hi Andrew: Thanks for your information. I agree that it is not a simple process. Except the casper_library and casper_library, there is another mystery fold in 10.1 library, XPS_lib. Could you tell me what's this for? Another question is: how sysgen could find correct HDL files/cores when we generate bitstream? I guess there must be some link between the simulink library and HDL file. Could you please what's they are? Thanks Wan -----Original Message----- From: Henry Chen [mailto:[email protected]<mailto:[email protected]>] Sent: Monday, 3 November 2008 5:19 PM To: [email protected]<mailto:[email protected]> Cc: Cheng, Wan (ATNF, Marsfield) Subject: Re: [casper] Casper 10.1 library issue Hi Wanxiang, The different FFTs are documented at http://casper.berkeley.edu/doc/mlib_devel_7_1/doc/html/node24.html http://casper.berkeley.edu/doc/mlib_devel_7_1/doc/html/node25.html http://casper.berkeley.edu/doc/mlib_devel_7_1/doc/html/node26.html http://casper.berkeley.edu/doc/mlib_devel_7_1/doc/html/node27.html But in summary the base FFT block handles complex inputs and gives complex outputs, and is completely parameterized to configure itself for biplex (2 independent channel inputs) or wideband (single channel, demultiplexed inputs). The real FFT takes real inputs and gives complex outputs, discarding the complex conjugates. For information about the sync input, please see the memo at http://casper.berkeley.edu/memos/sync_memo_v1.pdf Thanks, Henry [email protected] wrote: > HI Andrew: > > Thank you for your answer. Now I have better idea on how the libraries > are organized. What I am do is to setup the simulink simulation. Do you > know the difference among several FFT module provided in the casper library? > > They are : > > fft_biplex_real_2x > fft_biplex_real_4x > fft > fft_wideband_real > > And by the way, what are the function for the shift and sync pin? > > Thanks > > Wan > > ------------------------------------------------------------------------ > *From:* Andrew Martens > [mailto:[email protected]<mailto:[email protected]>] > *Sent:* Thursday, 30 October 2008 6:11 PM > *To:* Cheng, Wan (ATNF, Marsfield) > *Cc:* [email protected]<mailto:[email protected]>; > [email protected]<mailto:[email protected]> > *Subject:* Re: [casper] Casper 10.1 library issue > > Hi Wan > > Matlab scripts generate and modify an EDK project containing the HDL > code for the ADC. gen_xps_files.m (in xps_library directory) does most > of the work (look from line 246 or so) of copying a base EDK project (in > xps_lib directory) and then modifying it based on what your Simulink > design contains. There are different base EDK projects for each hardware > platform. The base EDK project contains the HDL relevant to the ADC (in > pcores/adc_interface_*) and the Matlab script modifes other files > (system.mhs, system.mss, data/system.ucf etc) to ensure the ADC related > infrastructure is included in the final EDK project. This is not a very > simple process and I am not sure where you want to jump in. > > Regards > Andrew > > 2008/10/30 <[email protected]> > > HI Laura: > > Thanks for your help. You are right. If I set more samples per > period, it is more difficult for me to find the difference. I setup > the sine wave according your setting, the difference is obvious. > > I think you explanation for the ADC internal structure is correct. > The extra delay in O1 is for alignment. But I still have one more > question: > > How the ADC module is linked to the HDL code in the library? Some > low level function, such as convert the DDR data into single sample > edge data, rebuffer the ADC clock, is done by HDL code. But I can > not see how these HDL files are included into the design flow. Do > you have any idea? > > Thanks > > Wan > > ------------------------------------------------------------------------ > *From:* Laura Spitler > [mailto:[email protected]<mailto:[email protected]> > <mailto:[email protected]<mailto:[email protected]>>] > *Sent:* Thursday, 30 October 2008 1:48 AM > > *To:* Cheng, Wan (ATNF, Marsfield) > *Cc:* [email protected]<mailto:[email protected]> > <mailto:[email protected]<mailto:[email protected]>> > *Subject:* Re: [casper] Casper 10.1 library issue > > Hi Wan, > > That is strange. I made a model that looks identical to your AC_test > using 10.1, and the output looks correct. > Here are the parameters I'm using for the 'Sine Wave' block: > Sine type : Sample based > Amplitude: 1 > Bias: 0 > Samples per period: 10 > Number of offset samples: 0 > Sample time: 1/8 > > The sample time of the ADC block should be 1. > > The ADC block uses 4 or 8 downsample blocks for interleave off and > on respectively to mimic the parallel output of the ADC, which is > why you have to set sample time to either 1/4 or 1/8. The line with > the delay block set to 2 rather than 1 is connected to the > downsample block with offset sample = 0. My guess is the latency > through the downsample block for the o0 sample is zero, so to keep > it aligned with o1-o7, it needs an extra delay. If I'm wrong, > someone correct me. In any case I don't think this is your trouble. > > If you're still having trouble, feel free to email me your model and > I'll take a look at it. > > Good luck, > Laura > > On Tue, Oct 28, 2008 at 10:37 PM, <[email protected]> wrote: > > Hi Laura: > > When I set the sample time of sine wave to 1/8, all outputs are > still same. I look at the subsystem of ADC module, and I find, > except O1 has 1 more cycle delay, all other channel have same > function. I am not sure how the ADC is implement. Do you have > any idea? > > Thanks > > Wan > > > ------------------------------------------------------------------------ > *From:* Laura Spitler > [mailto:[email protected]<mailto:[email protected]> > <mailto:[email protected]<mailto:[email protected]>>] > *Sent:* Wednesday, 29 October 2008 12:15 PM > *To:* Cheng, Wan (ATNF, Marsfield) > *Cc:* [email protected]<mailto:[email protected]> > <mailto:[email protected]<mailto:[email protected]>> > *Subject:* Re: [casper] Casper 10.1 library issue > > Hi Wan, > In the Simulink 'Sine Wave' block, do you have your sample time > set to 1/8 or 1? Similarly if you turn interleave off, the > sample time should be 1/4. > > Best, > Laura > > > On Tue, Oct 28, 2008 at 8:59 PM, <[email protected]> wrote: > > Hi All: > > I just set a simple ADC module in simulink and check the ADC > output. But the issue is that all eight outputs have same > output data. This is different with showed in manual. From > manual, these output should generate 8 sequence sampling. > But as I know, they seems same. For details, please see the > attached. > > Any idea? > > Thanks > > Wan > > > >
