| ######################################################################################################################## |
| # Copyright 2022 Mabrains Company LLC |
| # |
| # Licensed under the LGPL v2.1 License (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html |
| # |
| # 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. |
| ## |
| ######################################################################################################################## |
| ## |
| # This file is authored by: |
| # - <Mina Maksimous> <mina_maksimous@mabrains.com> |
| ## |
| ######################################################################################################################## |
| from .layers_definiations import * |
| import pya |
| |
| |
| class mimcap(): |
| mimcap_drawing_offest = 0.5 |
| metal3_margin_right = 0.995 |
| mimcap_enc_metal4 = 0.195 |
| met4_side_overlap = 0.005 |
| met4_side_width = 0.48 |
| |
| def number_spc_contacts(self, box_width, min_enc, cont_spc, cont_width): |
| """ Calculate number of cantacts in a given dimensions and the free space for symmetry. |
| |
| By getting the min enclosure,the width of the box,the width of the cont. or via |
| and the spacing between cont. or via |
| |
| Parameters |
| ---------- |
| box_width : double |
| The length you place the via or cont. in |
| |
| min_enc : double |
| the spacing between the edge of the box and the first via or cont. |
| |
| cont_spc : double |
| the spacing between different via's or cont |
| |
| cont_width: double |
| the cont. or via width in the same direction |
| |
| """ |
| |
| spc_cont = box_width - 2 * min_enc |
| num_cont = int((spc_cont + cont_spc) / (cont_width + cont_spc)) |
| free_spc = box_width - (num_cont * cont_width + |
| (num_cont - 1) * cont_spc) |
| return num_cont, free_spc |
| |
| def __init__(self, layout, w, l, pin0='p0', pin1='n0',connection_labels=1): |
| self.layout = layout |
| self.l_capm = self.layout.layer(capm_lay_num, capm_lay_dt) |
| self.l_met3 = self.layout.layer(met3_lay_num, met3_lay_dt) |
| self.l_met4 = self.layout.layer(met4_lay_num, met4_lay_dt) |
| self.l_met4_label = self.layout.layer( |
| met4_label_lay_num, met4_label_lay_dt) |
| self.l_via3 = self.layout.layer(via3_lay_num, via3_lay_dt) |
| self.l_prbndry = self.layout.layer(prbndry_lay_num, prbndry_lay_dt) |
| self.percision = 1/self.layout.dbu |
| self.cell = self.layout.create_cell( |
| "sky130_fd_pr__cap_mim_m3_1_w"+str(w)+"_l"+str(l)) |
| self.w = w * self.percision |
| self.l = l * self .percision |
| self.pin0 = pin0 |
| self.pin1 = pin1 |
| self.connection_labels=connection_labels |
| |
| def draw_vias(self, box, via3_cell): |
| via3_size = 0.2*self.percision |
| met_via3_enc_1 = 0.065*self.percision |
| met_via3_enc_2 = 0.09*self.percision |
| via3_spc = 0.2*self.percision |
| AL_via3 = pya.Box(0, 0, via3_size, via3_size) |
| # via3_cell = self.layout.create_cell("via3") |
| via3_cell.shapes(self.l_via3).insert(AL_via3) |
| num_via3_1, via3_free_spc_1 = self.number_spc_contacts( |
| box.width(), met_via3_enc_1, via3_spc, via3_size) |
| num_via3_2, via3_free_spc_2 = self.number_spc_contacts( |
| box.height(), met_via3_enc_2, via3_spc, via3_size) |
| via3_arr = pya.CellInstArray(via3_cell.cell_index(), pya.Trans( |
| pya.Point(box.p1.x+via3_free_spc_1 / 2, box.p1.y + via3_free_spc_2 / 2)), |
| pya.Vector(via3_spc + via3_size, 0), |
| pya.Vector(0, via3_spc + via3_size), |
| num_via3_1, num_via3_2) |
| |
| return via3_arr |
| |
| def draw_cap(self): |
| |
| mimcap_box = pya.Box(mimcap.mimcap_drawing_offest*self.percision, |
| mimcap.mimcap_drawing_offest*self.percision, |
| mimcap.mimcap_drawing_offest*self.percision+self.w, |
| mimcap.mimcap_drawing_offest*self.percision+self.l) |
| |
| self.cell.shapes(self.l_capm).insert(mimcap_box) |
| self.met4_center_box = mimcap_box.enlarge(-1*mimcap.mimcap_enc_metal4*self.percision, |
| |
| -1*mimcap.mimcap_enc_metal4*self.percision) |
| self.cell.shapes(self.l_met4).insert(self.met4_center_box) |
| met3_box = pya.Box(0, 0, |
| mimcap.mimcap_drawing_offest*self.percision + |
| self.w+mimcap.metal3_margin_right*self.percision, |
| 2*mimcap.mimcap_drawing_offest*self.percision+self.l) |
| |
| self.cell.shapes(self.l_met3).insert(met3_box) |
| pin0_text = pya.Text(self.pin0, self.met4_center_box.center().x, |
| self.met4_center_box.center().y) |
| prbndry_box = pya.Box(0, 0, |
| 2*mimcap.mimcap_drawing_offest*self.percision+self.w, |
| 2*mimcap.mimcap_drawing_offest*self.percision+self.l) |
| |
| self.cell.shapes(self.l_prbndry).insert(prbndry_box) |
| |
| self.met4_side_box = pya.Box(prbndry_box.p2.x-mimcap.met4_side_overlap*self.percision, |
| prbndry_box.p1.y + 0.06*self.percision, |
| prbndry_box.p2.x-mimcap.met4_side_overlap * |
| self.percision+mimcap.met4_side_width*self.percision, |
| prbndry_box.p2.y - 0.06*self.percision) |
| pin1_text = pya.Text(self.pin1, self.met4_side_box.center().x, |
| self.met4_side_box.center().y) |
| if self.connection_labels: |
| self.cell.shapes(self.l_met4_label).insert(pin0_text) |
| self.cell.shapes(self.l_met4_label).insert(pin1_text) |
| |
| self.cell.shapes(self.l_met4).insert(self.met4_side_box) |
| |
| # print('--->', self.layout.cell("via3")) |
| if self.layout.cell("via3") == None: |
| via3_cell = self.layout.create_cell("via3") |
| # print('--->', self.layout.cell("via3")) |
| else: |
| via3_cell = self.layout.cell("via3") |
| |
| via3_arr = self.draw_vias(self.met4_center_box, via3_cell) |
| |
| self.cell.insert(via3_arr) |
| |
| via3_arr = self.draw_vias(self.met4_side_box, via3_cell) |
| self.cell.insert(via3_arr) |
| # For correct drc on magic |
| self.cell.flatten(1) |
| return self.cell |
