Hi <@U01AX8X5N58>. I am trying to use openSTA tool...
# sky130v
Vikas Sachdeva
03/07/2022, 12:02 PMHi @User. I am trying to use openSTA tool for student labs. I don't see clock gating checks and recovery/removal checks being reported. Can you help?
the labs are here
https://github.com/vikkisachdeva/openSTA_sta_workshop/tree/master/vlsideepdive_openSTA_labs/lab6
https://github.com/vikkisachdeva/openSTA_sta_workshop/tree/master/vlsideepdive_openSTA_labs/lab7
d
Dinesh A
03/07/2022, 1:29 PMDid you added clock_gating check ?
set_clock_gating_check [-setup setup_time] [-hold hold_time] [-rise] [-fall] [-low] [-high] [objects]
v
Vikas Sachdeva
03/08/2022, 1:52 AMYes i added. Then also it didnt work
t
Tom Spyrou
03/08/2022, 4:54 AMI don't see any of these timing checks in your liberty file.
Tom Spyrou
03/08/2022, 4:54 AM[tspyrou@aspyrou-compute lib]$ grep gating *lib
sky130_fd_sc_hd__tt_025C_1v80.lib: clock_gating_integrated_cell : "latch_posedge";
sky130_fd_sc_hd__tt_025C_1v80.lib: clock_gating_integrated_cell : "latch_posedge";
sky130_fd_sc_hd__tt_025C_1v80.lib: clock_gating_integrated_cell : "latch_posedge";
sky130_fd_sc_hd__tt_025C_1v80.lib: clock_gating_integrated_cell : "latch_posedge_precontrol";
sky130_fd_sc_hd__tt_025C_1v80.lib: clock_gating_integrated_cell : "latch_posedge_precontrol";
sky130_fd_sc_hd__tt_025C_1v80.lib: clock_gating_integrated_cell : "latch_posedge_precontrol";
[tspyrou@aspyrou-compute lib]$ grep recovery *lib
sky130_fd_sc_hd__tt_025C_1v80.lib: timing_type : "recovery_falling";
sky130_fd_sc_hd__tt_025C_1v80.lib: timing_type : "recovery_falling";
sky130_fd_sc_hd__tt_025C_1v80.lib: timing_type : "recovery_falling";
sky130_fd_sc_hd__tt_025C_1v80.lib: timing_type : "recovery_falling";
sky130_fd_sc_hd__tt_025C_1v80.lib: timing_type : "recovery_rising";
sky130_fd_sc_hd__tt_025C_1v80.lib: timing_type : "recovery_rising";
Tom Spyrou
03/08/2022, 4:58 AMPerhaps you could move your lab to the sky130 or asap7 platforms which have complete liberty files?
v
Vikas Sachdeva
03/08/2022, 7:56 AMthanks. Let me give it a try. for this lab and see it works or not
Vikas Sachdeva
03/08/2022, 9:10 AMthanks this worked!
t
Tom Spyrou
03/08/2022, 6:51 PMGreat!