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Merged
merged 4 commits into from
Jul 2, 2025
Merged

Find EEPROM device more reliably on BeagleBones #372

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68fbb39
Find EEPROM device more reliably on BeagleBones
bgigous Dec 12, 2024
acaf6e6
BeagleBone: Fix logical error
bgigous Dec 12, 2024
1295880
Merge branch 'main' of https://github.com/bgigous/Adafruit_Python_Pla…
makermelissa Jul 2, 2025
af15c7b
Ran pre-commit
makermelissa Jul 2, 2025
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20 changes: 12 additions & 8 deletions adafruit_platformdetect/board.py
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@

"""

import glob
import os
import re

Expand Down Expand Up @@ -333,20 +334,23 @@ def _beaglebone_id(self) -> Optional[str]:
if "beaglev-starlight" in board_value:
return boards.BEAGLEV_STARLIGHT

# find device alias at i2c address 0x50 (0-00500, 0-00501, etc)
nvmem_devices = glob.glob("/sys/bus/nvmem/devices/0-0050*")
# do not expect there to be anything but one eeprom
if len(nvmem_devices) != 1:
return None

eeprom_dir = nvmem_devices[0]
try:
with open("/sys/bus/nvmem/devices/0-00500/nvmem", "rb") as eeprom:
with open(f"{eeprom_dir}/nvmem", "rb") as eeprom:
eeprom_bytes = eeprom.read(16)
except FileNotFoundError:
try:
with open("/sys/bus/nvmem/devices/0-00501/nvmem", "rb") as eeprom:
# Special Case for AI64
with open("/sys/bus/nvmem/devices/2-00500/nvmem", "rb") as eeprom:
eeprom_bytes = eeprom.read(16)
except FileNotFoundError:
try:
# Special Case for AI64
with open("/sys/bus/nvmem/devices/2-00500/nvmem", "rb") as eeprom:
eeprom_bytes = eeprom.read(16)
except FileNotFoundError:
return None
return None

if eeprom_bytes[:4] != b"\xaaU3\xee":
return None
Expand Down
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