enter_raw_repl

pyboard.py_enter_raw_repl

    def enter_raw_repl(self):
        # Brief delay before sending RAW MODE char if requests
        if _rawdelay > 0:
            time.sleep(_rawdelay)

        self.serial.write(b'\x02') # ctrl-B: exit RAW repl
        time.sleep(0.5)
        self.serial.write(b'\x03') # ctrl-C
        time.sleep(0.5)
        self.serial.write(b'\r\x03\x03') # ctrl-C twice: interrupt any running program

        # flush input (without relying on serial.flushInput())
        n = self.serial.inWaiting()
        while n > 0:
            self.serial.read(n)
            n = self.serial.inWaiting()

        self.serial.write(b'\r\x01') # ctrl-A: enter raw REPL
        data = self.read_until(1, b'raw REPL; CTRL-B to exit\r\n>')
        if not data.endswith(b'raw REPL; CTRL-B to exit\r\n>'):
            print(data)
            raise PyboardError('could not enter raw repl')

        self.serial.write(b'\x04') # ctrl-D: soft reset
        data = self.read_until(1, b'soft reboot\r\n')
        if not data.endswith(b'soft reboot\r\n'):
            print(data)
            raise PyboardError('could not enter raw repl')
        # By splitting this into 2 reads, it allows boot.py to print stuff,
        # which will show up after the soft reboot and before the raw REPL.
        # Modification from original pyboard.py below:
        #   Add a small delay and send Ctrl-C twice after soft reboot to ensure
        #   any main program loop in main.py is interrupted.
        time.sleep(0.5)
        self.serial.write(b'\x03')
        time.sleep(0.1)           # (slight delay before second interrupt
        self.serial.write(b'\x03')
        # End modification above.
        data = self.read_until(1, b'raw REPL; CTRL-B to exit\r\n')
        if not data.endswith(b'raw REPL; CTRL-B to exit\r\n'):
            print(data)
            raise PyboardError('could not enter raw repl')