2bef50c500
added extended address support file state such as line number, ext address, and EOF detection for early-quit init now takes an spi bus object linted examples
43 lines
1.3 KiB
Python
43 lines
1.3 KiB
Python
# Mega STK500 Bootloader programming example
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import board
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import busio
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import adafruit_avrprog
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spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
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avrprog = adafruit_avrprog.AVRprog()
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avrprog.init(spi, board.D5)
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# Each chip has to have a definition so the script knows how to find it
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atmega2560 = {'name': "ATmega2560"}
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atmega2560['sig'] = [0x1E, 0x98, 0x01]
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atmega2560['flash_size'] = 262144
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atmega2560['page_size'] = 256
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atmega2560['fuse_mask'] = (0xFF, 0xFF, 0x07, 0x3F)
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# Helper to print out errors for us
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def error(err):
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print("ERROR: "+err)
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avrprog.end()
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while True:
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pass
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if not avrprog.verify_sig(atmega2560, verbose=True):
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error("Signature read failure")
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print("Found", atmega2560['name'])
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# Since we are unsetting the lock fuse, an erase is required!
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avrprog.erase_chip()
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avrprog.write_fuses(atmega2560, low=0xFF, high=0xD8, ext=0x05, lock=0x3F)
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if not avrprog.verify_fuses(atmega2560, low=0xFF, high=0xD8, ext=0x05, lock=0x3F):
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error("Failure programming fuses: "+str([hex(i) for i in avrprog.read_fuses(atmega2560)]))
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print("Programming flash from file")
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avrprog.program_file(atmega2560, "stk500boot_v2_mega2560.hex", verbose=True, verify=True)
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avrprog.write_fuses(atmega2560, lock=0x0F)
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if not avrprog.verify_fuses(atmega2560,lock=0x0F):
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error("Failure verifying fuses!")
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print("Done!")
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