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Restructured camera rescue

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This commit is contained in:
Joel Collins 2021-01-06 17:31:45 +00:00
parent 3501a5b624
commit 61554af270
1 changed files with 18 additions and 21 deletions
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39
openflexure_microscope/rescue/check_picamera.py
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@ -2,21 +2,23 @@ import logging
from .error_sources import ErrorSource
picamera_import_error = ErrorSource(
# Error/exception messages we have enumerated and expect
PICAMERA_ERROR_MAP = {
"Camera is not enabled. Try running 'sudo raspi-config' and ensure that the camera has been enabled.": ErrorSource(
"Camera is not enabled. Try running 'sudo raspi-config' and ensure that the camera has been enabled."
),
"Failed to enable connection: Out of resources": ErrorSource(
"Camera already in use by another application. Please reboot your microscope."
),
}
# Basic import error. Usually damaged or disconnected camera
PICAMERA_IMPORT_ERROR = ErrorSource(
(
"Picamera module could not be imported.",
"Check physical connections to the camera as it may be damaged or disconnected.",
"Picamera module could not be imported. Check physical connections to the camera as it may be damaged or disconnected.",
)
)
picamera_errors = (
"Camera is not enabled. Try running 'sudo raspi-config' and ensure that the camera has been enabled.",
)
picamera_mmal_errors = {
"Failed to enable connection: Out of resources": "Camera already in use by another application."
}
def main():
error_sources = []
@ -25,20 +27,15 @@ def main():
try:
import picamerax
except Exception as e: # pylint: disable=W0703
# TODO: Parse exception object for a few different issues, and append
# different error sources E.g. pi with camera already in use,
# disconnected, unsupported OS, etc
logging.error(e)
error_sources.append(picamera_import_error)
error_sources.append(PICAMERA_IMPORT_ERROR)
else:
try:
_ = picamerax.PiCamera()
except picamerax.PiCameraError as e:
if e.args[0] in picamera_errors:
error_sources.append(ErrorSource(e.args[0]))
elif e.args[0] in picamera_mmal_errors:
error_sources.append(ErrorSource(picamera_mmal_errors[e.args[0]]))
msg = e.args[0]
if msg in PICAMERA_ERROR_MAP:
error_sources.append(PICAMERA_ERROR_MAP[msg])
else:
error_sources.append(ErrorSource(e.args[0]))
error_sources.append(ErrorSource("Unenumerated exception: " + msg))
return error_sources