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Updated for Python3 and added retry for sync operation #5

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Updated for Python3 and added retry for sync operation #5

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17 changes: 10 additions & 7 deletions nxpprog.py
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Original file line number Diff line number Diff line change
Expand Up @@ -447,7 +447,7 @@ def __init__(self, device, baud, xonxoff=False, control=False):
# or the device is in the wrong mode.
# This timeout is too short for slow baud rates but who wants to
# use them?
self._serial.setTimeout(5)
self._serial.timeout = 1
# device wants Xon Xoff flow control
if xonxoff:
self._serial.setXonXoff(1)
Expand Down Expand Up @@ -491,8 +491,8 @@ def write(self, data):

def readline(self, timeout=None):
if timeout:
ot = self._serial.getTimeout()
self._serial.setTimeout(timeout)
ot = self._serial.timeout
self._serial.timeout = timeout

line = b''
while True:
Expand All @@ -512,7 +512,7 @@ def readline(self, timeout=None):
line += c

if timeout:
self._serial.setTimeout(ot)
self._serial.timeout = ot

return line.decode("UTF-8", "ignore")

Expand Down Expand Up @@ -685,8 +685,11 @@ def isp_command(self, cmd):


def sync(self, osc):
self.dev_write(b'?')
s = self.dev_readline()
for _ in range(10):
self.dev_write(b'?')
s = self.dev_readline()
if s:
break
if not s:
panic("Sync timeout")
if s != self.sync_str:
Expand Down Expand Up @@ -1256,7 +1259,7 @@ def main(argv=None):
else:
panic("Unhandled option: %s" % o)

if cpu != "autodetect" and not cpu_parms.has_key(cpu):
if cpu != "autodetect" and not cpu in cpu_parms:
panic("Unsupported cpu %s" % cpu)

if len(args) == 0:
Expand Down