#596 Cannot generate pdn for my design New issue created by peijunh Hello, my design is stuck at 7-pdn when I using the flow.tcl of OpenLane. My design includes 5 macros, one is the sky130_sram_4kbyte_1rw1r_32x1024_8, the other four are my own sensors. All sensors use VDD and VSS instead of vccd1 stuff. I know the naming might cause issue, so I write my own pdn.tcl file, which is shown below. I also add a set ::env(PDN_CFG) $::env(DESIGN_DIR)/pdn.tcl in the config.tcl. But the openlane is giving me this error: [ERROR PSM-0020] Cannot find net VPWR in the design. Please provide a valid VDD/VSS net. Error: or_pdn.tcl, 39 PSM-0020

set ::power_nets "VDD"

set ::ground_nets "VSS"

set pdngen::global_connections {

VDD {

{inst_name .* pin_name VPWR}

{inst_name .* pin_name VPB}

{inst_name .* pin_name VDD}

{inst_name .* pin_name vccd1}

}

VSS {

{inst_name .* pin_name VGND}

{inst_name .* pin_name VNB}

{inst_name .* pin_name VSS}

{inst_name .* pin_name vssd1}

}

}

##===> Power grid strategy

pdngen::specify_grid stdcell {

name block

rails {

met1 {width 0.49 offset 0}

}

straps {

met4 {width 1.60 pitch 3820.0 offset 25}

met5 {width 1.60 pitch 56.0 offset 2}

}

connect {{met1 met4} {met4 met5} {met4_PIN_ver met5} {met4_PIN_hor met5} {met3_PIN_ver met5} {met3_PIN_hor met5} {met2_PIN_ver met5} {met2_PIN_hor met5} {met1_PIN_ver met5} {met1_PIN_hor met5} {met4 met5} {met4_PIN_ver met4} {met4_PIN_hor met4} {met3_PIN_ver met4} {met3_PIN_hor met4} {met2_PIN_ver met4} {met2_PIN_hor met4} {met1_PIN_ver met4} {met1_PIN_hor met4} {li1_PIN_ver met4} {li1_PIN_hor met4} {li1_PIN_ver met5} {li1_PIN_hor met5}}

obstructions {}

pins {met1 met2 met3 met4 met5}

pdngen::specify_grid macro {

orient {R0 R180 MX MY}

power_pins "VDD vccd1"

ground_pins "VSS vssd1"

blockages "met1 met2 met3 met4"

connect {{met3_PIN_hor met5} {met4_PIN_ver met5} {met3 met5} {met4 met5}}

}

After that, I try to us the common_pdn.tcl. so I eliminate the set ::env(PDN_CFG) $::env(DESIGN_DIR)/pdn.tcl in the config.tcl and add the following line in config.tcl. However, this is giving me another error: [ERROR PDN-9999] Unexpected error: key "vccd1" not known in dictionary PDN-9999

set ::env(DESIGN_IS_CORE) 1

set ::env(FP_PDN_CORE_RING) 1

set ::env(VDD_NETS) [list {vccd1} {vccd2} {vdda1} {vdda2}]

set ::env(GND_NETS) [list {vssd1} {vssd2} {vssa1} {vssa2}]

set ::env(SYNTH_USE_PG_PINS_DEFINES) "USE_POWER_PINS"

Does anyone have any idea? The-OpenROAD-Project/OpenLane