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diff --git a/caravel/gds/antenna_on_gds.tcl b/caravel/gds/antenna_on_gds.tcl
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+++ b/caravel/gds/antenna_on_gds.tcl
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+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
+
+gds read $::env(DESIGN_IN_ANTENNA).gds
+select top cell
+extract do local
+extract no capacitance
+extract no coupling
+extract no resistance
+extract no adjust
+extract unique
+# extract warn all
+extract
+feedback save ./tmp/$::env(DESIGN_IN_ANTENNA)_ext2spice.antenna.feedback.txt
+antennacheck debug
+antennacheck
diff --git a/caravel/gds/drc_on_gds.tcl b/caravel/gds/drc_on_gds.tcl
new file mode 100644
index 0000000..8bb3035
--- /dev/null
+++ b/caravel/gds/drc_on_gds.tcl
@@ -0,0 +1,61 @@
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
+
+gds read $::env(DESIGN_IN_DRC).gds
+set fout [open ./tmp/$::env(DESIGN_IN_DRC).drc w]
+set oscale [cif scale out]
+set cell_name $::env(DESIGN_IN_DRC)
+magic::suspendall
+puts stdout "\[INFO\]: Loading $::env(DESIGN_IN_DRC)\n"
+flush stdout
+load $::env(DESIGN_IN_DRC)
+select top cell
+drc euclidean on
+drc style drc(full)
+drc check
+set drcresult [drc listall why]
+set count 0
+puts $fout "$::env(DESIGN_IN_DRC)"
+puts $fout "----------------------------------------"
+foreach {errtype coordlist} $drcresult {
+ puts $fout $errtype
+ puts $fout "----------------------------------------"
+ foreach coord $coordlist {
+ set bllx [expr {$oscale * [lindex $coord 0]}]
+ set blly [expr {$oscale * [lindex $coord 1]}]
+ set burx [expr {$oscale * [lindex $coord 2]}]
+ set bury [expr {$oscale * [lindex $coord 3]}]
+ set coords [format " %.3f %.3f %.3f %.3f" $bllx $blly $burx $bury]
+ puts $fout "$coords"
+ set count [expr {$count + 1} ]
+ }
+ puts $fout "----------------------------------------"
+}
+
+puts $fout "\[INFO\]: COUNT: $count"
+puts $fout "\[INFO\]: Should be divided by 3 or 4"
+
+puts $fout ""
+close $fout
+
+puts stdout "\[INFO\]: COUNT: $count"
+puts stdout "\[INFO\]: Should be divided by 3 or 4"
+puts stdout "\[INFO\]: DRC Checking DONE (./tmp/$::env(DESIGN_IN_DRC).drc)"
+flush stdout
+
+puts stdout "\[INFO\]: Saving mag view with DRC errors(./tmp/$::env(DESIGN_IN_DRC).drc.mag)"
+# WARNING: changes the name of the cell; keep as last step
+save ./tmp/$::env(DESIGN_IN_DRC).drc.drc.mag
+puts stdout "\[INFO\]: Saved"
diff --git a/caravel/gds/gds2mag-all.sh b/caravel/gds/gds2mag-all.sh
new file mode 100644
index 0000000..b9ca6f2
--- /dev/null
+++ b/caravel/gds/gds2mag-all.sh
@@ -0,0 +1,34 @@
+#!/bin/sh
+# SPDX-FileCopyrightText: 2020 Efabless Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# SPDX-License-Identifier: Apache-2.0
+
+
+
+gunzip *.gz
+mv sram_1rw1r_32_256_8_sky130_lp1.gds sram_1rw1r_32_256_8_sky130.gds
+
+o-gds2mag-mag.sh simple_por.gds
+o-gds2mag-mag.sh gpio_control_block.gds
+o-gds2mag-mag.sh digital_pll.gds
+o-gds2mag-mag.sh storage.gds
+o-gds2mag-mag.sh mgmt_core.gds
+o-gds2mag-mag.sh chip_io.gds
+o-gds2mag-mag.sh sram_1rw1r_32_256_8_sky130.gds
+
+mv -f *.mag ../mag
+
+gzip -9 storage.gds mgmt_core.gds chip_io.gds
+
+
diff --git a/caravel/gds/user_analog_project_wrapper_empty.gds b/caravel/gds/user_analog_project_wrapper_empty.gds
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index 0000000..6bb65fc
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+++ b/caravel/gds/user_analog_project_wrapper_empty.gds
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diff --git a/caravel/gds/user_project_wrapper_empty.gds b/caravel/gds/user_project_wrapper_empty.gds
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index 0000000..83ec0b4
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+++ b/caravel/gds/user_project_wrapper_empty.gds
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