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tools: work around usbser.sys bug in idf_monitor

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implemented workaround in idf_monitor for known usbser.sys bug which
causes changes in RTS signal to only be sent if DTR signal also changes.
Works by forcing a dummy change in DTR signal (re-assigning its current
value, as it has previously been done in the flashing tool)

Closes https://github.com/espressif/esp-idf/pull/4676
This commit is contained in:
Rosa Elena Veiga Otero 2020-01-27 09:12:16 +00:00 committed by Roland Dobai
parent aedf89237f
commit 15011e0d16
1 changed files with 5 additions and 0 deletions
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5
tools/idf_monitor.py
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@ -355,6 +355,7 @@ class SerialReader(StoppableThread):
self.serial.rts = True # Force an RTS reset on open
self.serial.open()
self.serial.rts = False
self.serial.dtr = self.serial.dtr # usbser.sys workaround
try:
while self.alive:
data = self.serial.read(self.serial.in_waiting or 1)
@ -741,8 +742,10 @@ class Monitor(object):
self.serial_reader.stop()
elif cmd == CMD_RESET:
self.serial.setRTS(True)
self.serial.setDTR(self.serial.dtr) # usbser.sys workaround
time.sleep(0.2)
self.serial.setRTS(False)
self.serial.setDTR(self.serial.dtr) # usbser.sys workaround
self.output_enable(True)
elif cmd == CMD_MAKE:
self.run_make("flash")
@ -755,9 +758,11 @@ class Monitor(object):
elif cmd == CMD_ENTER_BOOT:
self.serial.setDTR(False) # IO0=HIGH
self.serial.setRTS(True) # EN=LOW, chip in reset
self.serial.setDTR(self.serial.dtr) # usbser.sys workaround
time.sleep(1.3) # timeouts taken from esptool.py, includes esp32r0 workaround. defaults: 0.1
self.serial.setDTR(True) # IO0=LOW
self.serial.setRTS(False) # EN=HIGH, chip out of reset
self.serial.setDTR(self.serial.dtr) # usbser.sys workaround
time.sleep(0.45) # timeouts taken from esptool.py, includes esp32r0 workaround. defaults: 0.05
self.serial.setDTR(False) # IO0=HIGH, done
else: