对应的命令为create_generated_clock -name gen_clk -source [get_pins clk_IBUF_BUFG_inst/O] -edges {1 3 4} -edge_shift {2.0 0.0 1.0} -add -master_clock [get_clocks "*"] [get_pins {shiftr_reg[13]/C}] 含义解释:-edge {1,3,4}即生成时钟的第1个上升沿位置,第1个下降沿位置,第2...
对于设计中有PLL、MMCM单元时,如果用户未设置生成时钟约束,软件会自动创建生成时钟,以上述工程为例,如果没有对clkout设置create_generated_clock约束时,查看时序报告,对于clkout0存在2个生成时钟CLKOUT0_1和CLKOUT0,对应的主时钟分别是clkin2和clkin1,同时在Intra-clock Paths中有对应的时序路径 对应自动生成的生成时钟...
create_generated_clock 是用来说明generated clock与source clock的相位(边沿)关系。同时根据source clock找到master clock以及source clock 和master clock的关系, 最终会确定generated clock和master clock的相位(边沿)关系。 在genereated clock的时候一定要明确generated clock与master clock的相位关系(rise->rise or ris...
[-master_clock clock]: 当这个generated clock有多个时钟扇入时,指定主的clock [-divide_by freq_factor] : 分频因子 -edges {edge1, edge2, edge3} :指定上升下降沿 [-edge_shift {shift1, shift2, shift3} ] : 可为负数或正数,1就代表edge shift1个lib time unit [-multiply_by freq_factor]:倍...
create_generated_clock用法 create_generated_clock是一个Vivado Tcl命令,可以用来创建多个已设定的时钟信号。它的用法如下: create_generated_clock [-name <name>] [-divide_by <divide_by>] [-multiply_by <multiplier>] [-source_waveform {<period> <duty>}] [-source <clock source>] [-rise_edge| ...
create_generated_clock[-h | -help] [-long_help][-add][-divide_by<factor>][-duty_cycle<percent>][-edge_shift<shift_list>][-edges<edge_list>][-invert][-master_clock<clock>][-multiply_by<factor>][-name<clock_name>][-offset][-phase<degrees>]-source<clock_source>[<targets>] Argumen...
其中,create_clock命令比较简单易懂,格式如下: create_clock [-name clock_name] \ -period period_value \ [-waveform edge_list] \ [-add] \ [source_objects] create_generated_clock命令解析 create_generated_clock命令格式如下,主要是定义generated clock和master clock的关系: create_generated_clock [-na...
**ERROR: (TA-152): A latency path from the 'Rise' edge of the master clock at source pin 'CLK_FAST' to the 'Rise' edge of generated clock 'clks' at pin'generate_ic_clocks/CLK_SLOW_reg/Q' cannot be found. You must modify your create_generated_c...
create_generated_clock –divide_by 2 –source [get_ports {CLK}] U1/reg1:Q The following example creates a generated clock at the primary output of myPLL with a period ¾ of the period at the reference pin clk create_generated_clock –divide_by 3 –multiply_by 4 -source clk [get_pi...
create_generated_clock [-name <arg>] [-source <args>] [-edges <args>] [-divide_by <arg>] [-multiply_by <arg>] [-combinational] [-duty_cycle <arg>] [-invert] [-edge_shift <args>] [-add] [-master_clock <arg>] [-quiet] [-verbose] <objects> ...