diff options
| -rwxr-xr-x | extra/usb_power/powerlog.py | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/extra/usb_power/powerlog.py b/extra/usb_power/powerlog.py index 00a508691a..3f299be790 100755 --- a/extra/usb_power/powerlog.py +++ b/extra/usb_power/powerlog.py @@ -328,25 +328,25 @@ class Spower(object): debuglog("Command RESET: %s" % "success" if ret == 0 else "failure") def reset(self): - """Try resetting the USB interface until success + """Try resetting the USB interface until success. + + Use linear back off strategy when encounter the error with 10ms increment. Raises: Exception on failure. """ - count = 10 - while count > 0: + max_reset_retry = 100 + for count in range(1, max_reset_retry + 1): self.clear() try: self.send_reset() - count = 0 + return except Exception as e: self.clear() self.clear() - debuglog("TRY %d of 10: %s" % (count, e)) - finally: - count -= 1 - if count == 0: - raise Exception("Power", "Failed to reset") + debuglog("TRY %d of %d: %s" % (count, max_reset_retry, e)) + time.sleep(count * 0.01) + raise Exception("Power", "Failed to reset") def stop(self): """Stop any active data acquisition.""" |