Hi Franco, I've had this error before. To be honest, since ISE compiled my design fine and I could see no issues in hardware when comparing digital noise sent through multiple FFT channels, I just ignored the problem. That is, I used planahead to generate constraints/pblocks, but compiled these with casper_xps using the UCF yellow block. If you get to the bottom of this I'd be interested in what you learn.
Cheers Jack On Thu, 11 May 2017 at 12:52 Franco <[email protected]> wrote: > Dear Casperites, > > I, once again, need your wisdom. I'm trying to do floorplanning on a > model, but whenever I create a new project with Xilinx Planahead the > model fails to load. Just to be sure I'm not doing something wrong I'll > detail my workflow: > > 1. I compile a Simulink model using Matlab/casper_xps. The model > compiles successfully. > > 2. I open PlanAhead with: "source setting64.sh && sudo planAhead" in the > Xilinx installation folder. > > 3. "Create a new project" -> "Import ISE & Place and Route Results" > > 4. In add netlist source list: "Add File" -> > "<myProject>/XPS_ROACH2_base/implementation/system.ngc", "Import > Directories" -> "<myProject>/XPS_ROACH2_base/implementation/" > > 5. In add constraints: "Add File" -> > "<myProject>/XPS_ROACH2_base/implementation/system.ucf" > > 6. In default part I choose: "xc6vsx475tff1759-1" > > 7. In import ISE implementation results: "Placement file" -> > "<myProject>/XPS_ROACH2_base/implementation/system_map.ncd", "Import > timing" -> "<myProject>/XPS_ROACH2_base/implementation/system.twx" > > 8. After doing this, the project starts loading the files and I get this > error: > > ERROR: [Designutils 20-662] Internal error: 'Cannot place carry chain > instance > > kestfilt_4096ch_600mhz1_XSG_core_config/kestfilt_4096ch_600mhz1_XSG_core_config/kestfilt_4096ch_600mhz1_x0/fft_wideband_real0_3bb28f4f1a/fft_direct_2a29a9ae17/butterfly2_0_74870afb03/bus_convert_a7eae3d1b2/conv2_4beea44e63/convert_8b81baa718/adder/comp9.core_instance9/blk00000001/blk0000002c > at (SLICE_X107Y155): Could not legally place instance > > kestfilt_4096ch_600mhz1_XSG_core_config/kestfilt_4096ch_600mhz1_XSG_core_config/kestfilt_4096ch_600mhz1_x0/fft_wideband_real0_3bb28f4f1a/fft_direct_2a29a9ae17/butterfly2_0_74870afb03/bus_convert_a7eae3d1b2/conv2_4beea44e63/convert_8b81baa718/adder/comp9.core_instance9/blk00000001/blk0000002c > at SLICE_X107Y155 since it belongs to a shape containing instance > > kestfilt_4096ch_600mhz1_XSG_core_config/kestfilt_4096ch_600mhz1_XSG_core_config/kestfilt_4096ch_600mhz1_x0/fft_wideband_real0_3bb28f4f1a/fft_direct_2a29a9ae17/butterfly2_0_74870afb03/bus_convert_a7eae3d1b2/conv2_4beea44e63/convert_8b81baa718/adder/comp9.core_instance9/blk00000001/blk0000001b. > The shape requires relative placement between > > kestfilt_4096ch_600mhz1_XSG_core_config/kestfilt_4096ch_600mhz1_XSG_core_config/kestfilt_4096ch_600mhz1_x0/fft_wideband_real0_3bb28f4f1a/fft_direct_2a29a9ae17/butterfly2_0_74870afb03/bus_convert_a7eae3d1b2/conv2_4beea44e63/convert_8b81baa718/adder/comp9.core_instance9/blk00000001/blk0000002c > and > > kestfilt_4096ch_600mhz1_XSG_core_config/kestfilt_4096ch_600mhz1_XSG_core_config/kestfilt_4096ch_600mhz1_x0/fft_wideband_real0_3bb28f4f1a/fft_direct_2a29a9ae17/butterfly2_0_74870afb03/bus_convert_a7eae3d1b2/conv2_4beea44e63/convert_8b81baa718/adder/comp9.core_instance9/blk00000001/blk0000001b > that cannnot be honored because it would result in an invalid location > for > > kestfilt_4096ch_600mhz1_XSG_core_config/kestfilt_4096ch_600mhz1_XSG_core_config/kestfilt_4096ch_600mhz1_x0/fft_wideband_real0_3bb28f4f1a/fft_direct_2a29a9ae17/butterfly2_0_74870afb03/bus_convert_a7eae3d1b2/conv2_4beea44e63/convert_8b81baa718/adder/comp9.core_instance9/blk00000001/blk0000001b.' > > And four other similar errors. > > I'm using Matlab 2013a, Xilinx ISE Design Suite 14.7, and the latest > version of casper-astro/mlib_devel from github in Debian Stretch. I'm > really confused by this error, it seems to be a placement error, but it > doesn't make sense because I could successfully compiled with > casper_xps. Googling the problem I only found this link: > > https://forums.xilinx.com/t5/Synthesis/Planahead-Cannot-place-carry-chain-instance/td-p/742833 > which didn't helped me too much. > > Has anyone encountered this same problem? > > Franco > > -- > You received this message because you are subscribed to the Google Groups " > [email protected]" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > -- You received this message because you are subscribed to the Google Groups "[email protected]" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected].
