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Pull in upstream fixes for getting board into flash mode.

This commit is contained in:
Johny Mattsson 2015-07-02 20:09:32 +10:00
parent 125d2173d6
commit 8394333cab
1 changed files with 25 additions and 31 deletions
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34
tools/esptool.py
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@ -128,30 +128,20 @@ class ESPROM:
def connect(self):
print 'Connecting...'
# RTS = CH_PD (i.e reset)
# DTR = GPIO0
# self._port.setRTS(True)
# self._port.setDTR(True)
# self._port.setRTS(False)
# time.sleep(0.1)
# self._port.setDTR(False)
# NodeMCU devkit
self._port.setRTS(True)
self._port.setDTR(True)
time.sleep(0.1)
self._port.setRTS(False)
for _ in xrange(4):
# issue reset-to-bootloader:
# RTS = either CH_PD or nRESET (both active low = chip in reset)
# DTR = GPIO0 (active low = boot to flasher)
self._port.setDTR(False)
time.sleep(0.1)
self._port.setRTS(True)
time.sleep(0.1)
time.sleep(0.05)
self._port.setDTR(True)
self._port.setRTS(False)
time.sleep(0.3)
self._port.setDTR(True)
time.sleep(0.05)
self._port.setDTR(False)
self._port.timeout = 0.5
for i in xrange(10):
self._port.timeout = 0.3 # worst-case latency timer should be 255ms (probably <20ms)
for _ in xrange(4):
try:
self._port.flushInput()
self._port.flushOutput()
@ -159,7 +149,11 @@ class ESPROM:
self._port.timeout = 5
return
except:
time.sleep(0.1)
time.sleep(0.05)
# this is a workaround for the CH340 serial driver on current versions of Linux,
# which seems to sometimes set the serial port up with wrong parameters
self._port.close()
self._port.open()
raise Exception('Failed to connect')
""" Read memory address in target """