lfe5u-25f-pins.py

"""
Takes an ecpunpack output .config file and a iodb.json and works out attributes
set for each package pin as best it can.

LFE5U-25F-xBG256 only.
"""

import re
import sys
import json
import pprint

DBPATH = "/usr/share/trellis/database/ECP5/LFE5U-25F/iodb.json"


def lookup_pin(iodb, loc, pio):
    # print("lookup, loc=", loc, "pio=", pio, end="")
    row, col = loc
    if row == 0 and col in (5, 7, 10, 12, 14, 16, 19, 21, 23, 25, 28, 30, 34,
                            36, 39, 43, 45, 48, 50, 52, 54, 57, 59, 61, 63,
                            66, 68):
        col -= 1
    if col in (0, 72) and row in (3, 12, 48):
        row -= 1
    # print(", mapped row=", row, "col=", col, ",", iodb.get((row, col, pio)))
    return iodb.get((row, col, pio))


def load_iodb():
    with open(DBPATH, "r") as f:
        iodb = json.load(f)
    db = {}
    for pin, loc in iodb["packages"]["CABGA256"].items():
        row = loc["row"]
        col = loc["col"]
        pio = loc["pio"]
        db[(row, col, pio)] = pin
    return db


def process_config(iodb, cfgpath):
    with open(cfgpath, "r") as f:
        tiles = {}
        loc = None
        for line in f:
            if line.startswith(".tile"):
                match = re.search("^.tile MIB_R([0-9]*)C([0-9]*):", line)
                if not match:
                    loc = None
                    continue
                row = int(match.group(1))
                col = int(match.group(2))
                loc = (row, col)
                if loc not in tiles:
                    tiles[loc] = {}
            elif loc and line.startswith("enum: PIO"):
                key, val = line.split()[1:]
                io, key = key.split(".")
                io = io[3]
                if io not in tiles[loc]:
                    tiles[loc][io] = {"pin": lookup_pin(iodb, loc, io)}
                tiles[loc][io][key] = val.strip()

    return tiles


if __name__ == "__main__":
    tiles = process_config(load_iodb(), sys.argv[1])
    pins = {}
    for tile in tiles:
        for pio in tiles[tile]:
            p = tiles[tile][pio]
            if p.get("pin"):
                pins[p["pin"]] = p
                del pins[p["pin"]]["pin"]
    pprint.pprint(pins.keys())