46 lines
1.4 KiB
Python
46 lines
1.4 KiB
Python
"""
|
|
Trinket/Gemma (ATtiny85) programming example, be sure you have the '85 wired up so:
|
|
Trinket Ground to CircuitPython GND
|
|
Trinket USB to CircuitPythong USB or make sure the Trinket is powered by USB
|
|
Pin 2 -> CircuitPython SCK
|
|
Pin 1 -> CircuitPython MISO
|
|
Pin 0 -> CircuitPython MOSI
|
|
RESET -> CircuitPython D5 (or change the init() below to change it!)
|
|
Drag "trinket_boot.hex" onto the CircuitPython disk drive, then open REPL!
|
|
"""
|
|
|
|
import board
|
|
import busio
|
|
import adafruit_avrprog
|
|
|
|
spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
|
|
avrprog = adafruit_avrprog.AVRprog()
|
|
avrprog.init(spi, board.D5)
|
|
|
|
# Each chip has to have a definition so the script knows how to find it
|
|
attiny85 = avrprog.Boards.ATtiny85
|
|
|
|
|
|
def error(err):
|
|
""" Helper to print out errors for us and then halt """
|
|
print("ERROR: " + err)
|
|
avrprog.end()
|
|
while True:
|
|
pass
|
|
|
|
|
|
while input("Ready to GO, type 'G' here to start> ") != "G":
|
|
pass
|
|
|
|
if not avrprog.verify_sig(attiny85, verbose=True):
|
|
error("Signature read failure")
|
|
print("Found", attiny85["name"])
|
|
|
|
avrprog.write_fuses(attiny85, low=0xF1, high=0xD5, ext=0x06, lock=0x3F)
|
|
if not avrprog.verify_fuses(attiny85, low=0xF1, high=0xD5, ext=0x06, lock=0x3F):
|
|
error("Failure verifying fuses!")
|
|
|
|
print("Programming flash from file")
|
|
avrprog.program_file(attiny85, "trinket_boot.hex", verbose=True, verify=True)
|
|
|
|
print("Done!")
|