debug.py

#!/usr/bin/env python3

from jdmtool.device import GarminProgrammerDevice
from jdmtool.main import with_usb


@with_usb
def debug(dev: GarminProgrammerDevice):
    dev.before_read()

    BLOCKS_PER_PAGE = 16

    start = 0x0000
    end = 0x0400

    try:
        for page in range(start, end, 0x10):
            print(f"Trying page {page:04X}...")

            dev.select_page(page)
            blocks1 = [dev.read_block() for _ in range(BLOCKS_PER_PAGE)]

            dev.select_page(page)
            blocks2 = [dev.read_block() for _ in range(BLOCKS_PER_PAGE)]

            if blocks1 != blocks2:
                print("  Empty")
                continue

            filename = f'{page:04X}.bin'
            print(f"  Found data! Saving to {filename}")
            with open(filename, 'wb') as fd:
                for b in blocks1:
                    fd.write(b)

    finally:
        dev.set_led(False)


if __name__ == '__main__':
    debug()