|
Doug, I am also having issues with meeting timing with the reference
design an EDK 9.1.02. I’ve tried numerous things but haven’t quite
gotten there. Here’s a summary of what I’ve done (with some
success). Put the “–timing;” in the map section of
./etc/fast_runtime.opt. (as Jim Van Vorst suggested) Add IOBDELAY=NONE to your ./data/system.ucf file on your *DDR_DQ_pin*
and *DDR_DQS_pin* pins. I also added input buffers to the ethernet tx_clk and rx_clk inputs
to insure IBUFGs were available for the other clock pins. This is what Avnet
did for their uClinux reference design. This is trickier and requires a folder/files
to be added in your pcores directory. I’m running the reference design back through the tools with
all the above modifications and should be able to report shortly if it worked. Jim From:
owner-microblaze-uclinux@xxxxxxxxxxxxxx
[mailto:owner-microblaze-uclinux@xxxxxxxxxxxxxx] On Behalf Of Douglas Bruey Hello, I am trying to build the Petalinux
Xilinx-Spartan3E1600-RevA-edk91 reference design using Platform Studio Release
Version: 9.1.02i, Application Version: Build EDK_J_SP2.4+0. The PAR output from
bitstream generation says that the design did not meet timing and lists
constraints that have not been met (the output is listed below). I am wondering
what I am doing wrong. The bitstream works on one of my 1600E evaluation boards
but fails intermittently on another (while u-boot is running). I am new to XPS
and microblaze so any advice is greatly appreciated. Thank you, Doug Generating "PAR" statistics. ************************** Generating Clock Report ************************** +---------------------+--------------+------+------+------------+-------------+ | Clock
Net | Resource |Locked|Fanout|Net
Skew(ns)|Max Delay(ns)| +---------------------+--------------+------+------+------------+-------------+ |
DBG_CLK_s | BUFGMUX_X1Y11| No | 154 |
0.243 | 0.548 | +---------------------+--------------+------+------+------------+-------------+ |fpga_0_Ethernet_MAC_
|
| |
|
| | |PHY_rx_clk_pin_BUFGP
|
| |
|
| | |
| BUFGMUX_X1Y10| No | 19 |
0.032 | 0.549 | +---------------------+--------------+------+------+------------+-------------+ | ddr_dev_clk_s
| BUFGMUX_X2Y11| No | 140 |
0.178 | 0.551 | +---------------------+--------------+------+------+------------+-------------+ |
ddr_clk_90_s | BUFGMUX_X1Y1| No | 76 |
0.200 | 0.542 | +---------------------+--------------+------+------+------------+-------------+ | ddr_dev_clk_90_s |
BUFGMUX_X0Y3| No | 16 |
0.014 | 0.232 | +---------------------+--------------+------+------+------------+-------------+ |fpga_0_Ethernet_MAC_
|
| |
|
| | |PHY_tx_clk_pin_BUFGP
|
| |
|
| | |
|
BUFGMUX_X1Y0| No | 32 |
0.119 | 0.543 | +---------------------+--------------+------+------+------------+-------------+ | dlmb_port_BRAM_Clk | BUFGMUX_X2Y10|
No | 4333 | 0.292 |
0.552 | +---------------------+--------------+------+------+------------+-------------+ |ethernet_mac/etherne
|
| |
|
| | |t_mac/SG_DMA.XEMAC_I
|
| |
|
| | |/inst_EMAC/rState<35
|
| |
|
| | |
> | Local|
| 11 | 0.000 |
1.370 | +---------------------+--------------+------+------+------------+-------------+ |opb_intc_0/opb_intc_
|
|
|
|
| | |0/INTC_CORE_I/MANY_I
|
| |
|
| | |NTR_DET_GEN.INTR_DET
|
| |
|
| | | _I/interrupts<4>
|
Local| | 1 |
0.000 | 1.180 | +---------------------+--------------+------+------+------------+-------------+ |opb_intc_0/opb_intc_
|
| |
|
| | |0/INTC_CORE_I/MANY_I
|
| |
|
| | |NTR_DET_GEN.INTR_DET
|
| |
|
| | | _I/interrupts<2>
|
Local| | 1 |
0.000 | 1.193 | +---------------------+--------------+------+------+------------+-------------+ |fpga_0_DDR_CLK_FB_IB
|
| |
|
| | |
UFG |
Local| | 4 |
0.000 | 3.077 | +---------------------+--------------+------+------+------------+-------------+ |debug_module/bscan_u
|
| |
|
| | |
pdate |
Local| | 1 |
0.000 | 0.830 | +---------------------+--------------+------+------+------------+-------------+ | sys_clk_pin_IBUFG
|
Local| | 4 |
0.372 | 2.372 | +---------------------+--------------+------+------+------------+-------------+ * Net Skew is the difference between the minimum and
maximum routing only delays for the net. Note this is different from
Clock Skew which is reported in TRCE timing report. Clock Skew is the
difference between the minimum and maximum path delays which includes
logic delays. Timing Score: 625412 WARNING:Par:62 - Your design did not meet
timing. The following are some suggestions to assist you to meet timing in
your design. Review the timing
report using Timing Analyzer (In ISE select "Post-Place & Route Static Timing
Report"). Go to the failing constraint(s) and select the "Timing
Improvement Wizard" link for suggestions to correct each problem. Rerun Map with "-timing" (ISE
process "Perform Timing -Driven Packing and Placement" Run Multi-Pass Place and Route in PAR
using at least 5 "PAR Iterations" (ISE process "Multi Pass Place
& Route"). Use the Xilinx "xplorer" script
to try special combinations of options known to produce very good
results. See
http://www.xilinx.com/ise/implementation/Xplorer.htm for details. Visit the Xilinx technical support web
at http://support.xilinx.com and go to either "Troubleshoot->Tech
Tips->Timing & Constraints" or " TechXclusives->Timing Closure"
for tips and suggestions for meeting timing in your design. INFO:Timing:3284 - This timing report was generated
using estimated delay information. For accurate numbers,
please refer to the post Place and Route timing report. Asterisk (*) preceding a constraint indicates it was
not met. This may be due to a setup or hold
violation. ------------------------------------------------------------------------------------------------------
Constraint
| Check | Worst Case | Best Case | Timing |
Timing
| |
Slack | Achievable | Errors | Score ------------------------------------------------------------------------------------------------------ * TS_dcm_0_dcm_0_CLKFX_BUF = PERIOD TIMEGRP |
SETUP | -4.053ns|
174.912ns| 189| 500180
"dcm_0_dcm_0_CLKFX_BUF"
TS_sys_c | HOLD |
0.927ns|
|
0| 0 lk_pin / 1.47619048 HIGH
50%
|
|
|
|
| ------------------------------------------------------------------------------------------------------ * TS_dcm_1_dcm_1_CLK90_BUF = PERIOD TIMEGRP |
SETUP | -2.704ns|
86.051ns|
8| 18590
"dcm_1_dcm_1_CLK90_BUF"
TS_dcm_0 | HOLD |
1.670ns|
|
0| 0 _dcm_0_CLKFX_BUF PHASE 2.54 ns HIGH
50% |
|
|
|
| ------------------------------------------------------------------------------------------------------ * TS_dcm_0_dcm_0_CLK0_BUF = PERIOD TIMEGRP |
SETUP | -2.514ns|
92.907ns| 128| 39167 "dcm_0_dcm_0_CLK0_BUF"
TS_sys_clk_pin | HOLD
|
0.717ns|
| 0|
0 HIGH
50%
|
|
|
|
| ------------------------------------------------------------------------------------------------------ * TSRXIN_Ethernet_MAC = MAXDELAY FROM TIMEG |
MAXDELAY| -1.849ns|
7.849ns| 37|
67475 RP "PADS" TO
TIMEGRP "RXCLK_GRP_E
|
|
|
|
| thernet_MAC" 6
ns
| |
|
|
| ------------------------------------------------------------------------------------------------------ NET
"fpga_0_Ethernet_MAC_PHY_tx_clk_pin_B | NETSKEW |
0.323ns| 1.677ns|
0| 0 UFGP" MAXSKEW = 2
ns
|
|
|
| |
------------------------------------------------------------------------------------------------------ NET
"fpga_0_Ethernet_MAC_PHY_rx_clk_pin_B | NETSKEW |
1.890ns| 0.110ns|
0| 0 UFGP" MAXSKEW = 2
ns
|
|
|
|
| ------------------------------------------------------------------------------------------------------ NET
"fpga_0_Ethernet_MAC_PHY_rx_clk_pin_B | SETUP
| 6.248ns|
22.148ns|
0| 0 UFGP" PERIOD = 40 ns HIGH 14
ns |
HOLD |
1.143ns|
| 0|
0 ------------------------------------------------------------------------------------------------------ TSTXOUT_Ethernet_MAC = MAXDELAY FROM TIME |
MAXDELAY| 7.088ns|
2.912ns|
0| 0 GRP "TXCLK_GRP_Ethernet_MAC"
TO T
|
|
|
| |
IMEGRP "PADS" 10
ns
|
|
|
|
| ------------------------------------------------------------------------------------------------------ TS_sys_clk_pin = PERIOD TIMEGRP
"sys_clk_ | SETUP |
12.789ns| 2.210ns|
0| 0 pin" 14.999 ns HIGH
50%
| HOLD |
0.453ns|
|
0| 0 ------------------------------------------------------------------------------------------------------ NET
"fpga_0_Ethernet_MAC_PHY_tx_clk_pin_B | SETUP
| 19.052ns|
10.689ns|
0| 0 UFGP" PERIOD = 40 ns HIGH 14
ns |
HOLD |
0.949ns|
|
0| 0 ------------------------------------------------------------------------------------------------------ 4 constraints not met. Generating Pad Report. All signals are completely routed. Total REAL time to PAR completion: 13 mins 20 secs Total CPU time to PAR completion: 10 mins 50 secs Peak Memory Usage: 418 MB Placement: Completed - No errors found. Routing: Completed - No errors found. Timing: Completed - 362 errors found. Number of error messages: 0 Number of warning messages: 7 Number of info messages: 0 Writing design to file system.ncd PAR done! |