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retry to enter raw repl #40

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retry to enter raw repl #40

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2f17707
retry to enter raw repl
gschaden Jan 10, 2023
db5e7b2
fix exception handling
gschaden Jan 12, 2023
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13 changes: 10 additions & 3 deletions microfs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -69,7 +69,7 @@ def flush_to_msg(serial, msg):
if not data.endswith(msg):
if COMMAND_LINE_FLAG:
print(data)
raise IOError("Could not enter raw REPL.")
raise IOError("Could not enter raw REPL. %s" % data)

def flush(serial):
"""Flush all rx input without relying on serial.flushInput()."""
Expand All @@ -87,8 +87,15 @@ def flush(serial):
time.sleep(0.01)
flush(serial)
# Go into raw mode with CTRL-A.
serial.write(b"\r\x01")
flush_to_msg(serial, raw_repl_msg)
for i in range(3):
# retry to enter raw repl
try:
serial.write(b"\r\x01")
flush_to_msg(serial, raw_repl_msg)
break
except Exception as ex:
if i == 2: # retrying did not help
raise ex
# Soft Reset with CTRL-D
serial.write(b"\x04")
flush_to_msg(serial, b"soft reboot\r\n")
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