差别

这里会显示出您选择的修订版和当前版本之间的差别。

--- edastudy:sta:pt [2024/03/16 11:18] – 移除 - 外部编辑 (Unknown date) 127.0.0.1
+++ edastudy:sta:pt [2025/02/20 09:08] (当前版本) – [7. report_global_slack] user01
@@ 行 1: / 行 1: @@
+====== pt ======
+PrimeTime 2019 Workshop Lab & Student Lab guide
+http://bbs.eetop.cn/thread-916544-1-1.html
+(出处: EETOP 创芯网论坛 (原名：电子顶级开发网))
+===== - report_timing =====
+<code tcl>
+string report_timing
+   [-from from_list
+      | -rise_from rise_from_list
+      | -fall_from fall_from_list]
+   [-to to_list
+      | -rise_to rise_to_list
+      | -fall_to fall_to_list]
+   [-through through_list]
+   [-rise_through rise_through_list]
+   [-fall_through fall_through_list]
+   [-exclude exclude_list
+      | -rise_exclude rise_exclude_list
+      | -fall_exclude fall_exclude_list]
+   [-delay_type delay_type]    #min(hold), max(setup)
+   [-nworst paths_per_endpoint]
+   [-max_paths max_path_count]
+   [-group group_name]
+   [-unique_pins]
+   [-slack_greater_than minimum_slack]
+   [-slack_lesser_than  maximum_slack]
+   [-ignore_register_feedback feedback_slack_cutoff]
+   [-report_ignored_register_feedback]
+   [-include_hierarchical_pins]
+   [-trace_latch_borrow]
+   [-trace_latch_forward]
+   [-pba_mode none | path | exhaustive]
+   [-start_end_type from_to_type]
+   [-normalized_slack]
+   [-start_end_pair]
+   [-cover_design]
+   [-cover_through through_list]
+   [-dont_merge_duplicates]
+   [-pre_commands  pre_command_string]
+   [-post_commands post_command_string]
+   [-path_type format]    #full, full_clock, full_clock_expanded
+   [-input_pins]
+   [-nets]
+   [-nosplit]
+   [-transition_time]
+   [-capacitance]
+   [-significant_digits digits]
+   [-crosstalk_delta]
+   [-derate]
+   [-variation]
+   [-exceptions dominant | overridden | all]
+   [-voltage]
+   [-supply_net_group]
+   [-physical]
+   [-sort_by group | slack]
+   [-tag_paths_filtered_by_pba tag_name]
+   [path_collection]
+加上-exceptions all可以报出unconstrained path，
+这样可以用一些special check,去检查这种异步路径的走线时延，比如用来检查FIFO
+The unconstrained paths and their reason is reported for all three options if
+timing_report_unconstrained_paths variable is set to true, otherwise unconstrained paths will not be
+reported.
+set_app_var timing_report_unconstrained_paths true
+</code>
+===== - report_clock =====
+<code tcl>
+status report_clock
+   [-attributes]
+   [-skew]
+   [-groups]
+   [-map]
+   [-map_of instance_list]
+   [-cells hierarchical_cell_list]
+   [-include internal | virtual]
+   [-exclusivity]
+   [-nosplit]
+   [clock_names]
+report_clock -exclusivity -groups可以报出设置了哪些clock group， 是通过set_clock_groups命令。
+</code>
+===== - set_clock_groups  =====
+<code tcl>
+status set_clock_groups
+   -group clock_list
+   [-exclusive]
+   [-physically_exclusive]
+   [-logically_exclusive]
+   [-asynchronous]
+   [-allow_paths]
+   [-name name]
+   [-comment comment_string]
+set_clock_groups -physically_exclusive -group {CLK1 CLK3} -group {CLK2 CLK4}
+CLK1 & CLK3是一个group,  CLK2 & CLK4是一个group,  CLK1 CLK3 与CLK2 CLK4为不同group(异步)
+</code>
+===== - create_generated_clock  =====
+<code tcl>
+string create_generated_clock
+   [-name clock_name]
+   -source master_pin
+   [-divide_by divide_factor | -multiply_by multiply_factor |
+    -edges edge_list ]
+   [-combinational]
+   [-duty_cycle percent]
+   [-invert]
+   [-preinvert]
+   [-edge_shift edge_shift_list]
+   [-add]
+   [-master_clock clock]
+   [-pll_output output_pin]
+   [-pll_feedback feedback_pin]
+   [-comment comment_string]
+   source_objects
+如果gen clk设置得不对的话，会导致其定义点定义不上时钟，并且之后的fanout也不会有时钟，这点有注意。
+一般在upadate timing的时候会报gen clk不能expand，这时候就要去检查下gen clk是否设置正确。
+而且generated clock定义点如果原来有多个clock sources的话，
+需要对每个clock sources都给定义generated clock，而且还要设置好相应的clock group
+定义不全的话，会导致后续否则与相应source点之间没有timing path， 可能会有timing风险。
+</code>
+===== - set_sense =====
+<code tcl>
+status set_sense
+   [-type clock | data]
+   [-non_unate]
+   [-rise]
+   [-fall]
+   [-clock_fall]
+   [-clock_rise]
+   [-primary]
+   [-generated]
+   [-positive]
+   [-negative]
+   [-stop_propagation]
+   [-clock_leaf]
+   [-pulse pulse_type]
+   [-clocks clock_list]
+   object_list
+</code>
+===== - report_sense =====
+<code>
+string report_sense
+   [-type clock | data]
+   [-clocks clock_list]
+   [-nosplit]
+   object_list
+</code>
+===== - report_global_slack =====
+Displays slack of specified pins or ports.
+<code>
+string report_global_slack
+   [-significant_digits digits]
+   [-nosplit]
+   [-min]
+   [-max]
+   [-rise]
+   [-fall]
+   port_pin_list
+</code>
+===== - report unconstrained path =====
+设置app
+<code>
+set_app_var timing_report_unconstrained_paths true
+</code>