From 3a74fb7a04d1bd9e7b54d3a9efe314c79bb2dc68 Mon Sep 17 00:00:00 2001 From: Xifan Tang Date: Wed, 25 Mar 2020 15:23:21 -0600 Subject: [PATCH] update documentation for the new options --- docs/source/openfpga_shell/openfpga_commands.rst | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/docs/source/openfpga_shell/openfpga_commands.rst b/docs/source/openfpga_shell/openfpga_commands.rst index 6551b7421..fd44f6fbb 100644 --- a/docs/source/openfpga_shell/openfpga_commands.rst +++ b/docs/source/openfpga_shell/openfpga_commands.rst @@ -174,11 +174,15 @@ FPGA-SDC - ``--file`` or ``-f`` Specify the output directory for SDC files - - ``--constrain_global_port`` Constrain all the global ports of FPGA fabric + - ``--constrain_global_port`` Constrain all the global ports of FPGA fabric. + + - ``--constrain_non_clock_global_port`` Constrain all the non-clock global ports as clocks ports of FPGA fabric + + .. note:: ``constrain_global_port`` will treat these global ports in Clock Tree Synthesis (CTS), in purpose of balancing the delay to each sink. Be carefull to enable ``constrain_non_clock_global_port``, this may significanly increase the runtime of CTS as it is supposed to be routed before any other nets. This may cause routing congestion as well. - ``--constrain_grid`` Constrain all the grids of FPGA fabric - - `--constrain_sb`` Constrain all the switch blocks of FPGA fabric + - ``--constrain_sb`` Constrain all the switch blocks of FPGA fabric - ``--constrain_cb`` Constrain all the connection blocks of FPGA fabric