Boot mode implemented, optimized execution time and fixed bugs

src/picowatch.py

@@ -192,7 +192,7 @@ class Pyboard(object):
     i: int = 0
     serial: Union[Serial, Telnet]
 
-    def __init__(self, device: str, baudrate: int = 115200, login: str = '', password: str = ''):
+    def __init__(self, device: str, baudrate: int = 115200, login: str = 'micro', password: str = 'python'):
         is_telnet = device and device.count('.') == 3
 
         for _ in range(0, 3):
@@ -216,82 +216,89 @@ class Pyboard(object):
         sys.stdout.flush()
         self.i = (self.i + 1) % 4      
 
-    def stdout_write_bytes(self, data: str):
-        sys.stdout.buffer.write(data.replace(b'\x04', b''))
-        sys.stdout.buffer.flush()
-
     def send_ok(self) -> bytes:
         self.serial.write(b'\x04')
         return b'OK'
 
     def send_ctrl_a(self) -> bytes:
-        # ctrl-A: enter raw REPL
+        # Ctrl-A on a blank line will enter raw REPL mode. This is like a permanent paste mode, except that characters are not echoed back.
         self.serial.write(b'\x01')
         return b'raw REPL; CTRL-B to exit\r\n>'
 
     def send_ctrl_b(self):
-        # ctrl-B: exit raw REPL
+        # Ctrl-B on a blank like goes to normal REPL mode.
         self.serial.write(b'\x02')
 
     def send_ctrl_c(self) -> bytes:
-        # ctrl-C twice: interrupt any running program
+        # Ctrl-C cancels any input, or interrupts the currently running code.
         for _ in range(0, 2):
             self.serial.write(b'\x03')
 
         return b'raw REPL; CTRL-B to exit\r\n'
 
     def send_ctrl_d(self) -> bytes:
-        # ctrl-D: soft reset
+        # Ctrl-D on a blank line will do a soft reset.
         self.serial.write(b'\x04')
         return b'soft reboot\r\n'
 
-    def read_until(self, delimiter: bytes, stream_output: bool = False, show_status: bool = False) -> Optional[bytes]:
+    def until_nothing_in_waiting(self):
-        data = self.serial.read(1)
-
-        if stream_output:
-            self.stdout_write_bytes(data)
-
-        timeout = 0
-        max_len = len(delimiter)
-
-        while not timeout >= 1000:
-            if data.endswith(delimiter):
-                return data
-            elif self.serial.inWaiting() > 0:
-                timeout = 0
-                stream_data = self.serial.read(1)
-                data += stream_data
-
-                if stream_output:
-                    self.stdout_write_bytes(stream_data)
-                    data = data[-max_len:]
-                elif show_status:
-                    self.transfer_status()
-            else:
-                timeout += 1
-                time.sleep(0.0001)
-
-    def __enter__(self):
-        self.send_ctrl_c()
         n = self.serial.inWaiting()
 
         while n > 0:
             self.serial.read(n)
             n = self.serial.inWaiting()
 
+    def read_until(self, delimiter: bytes, stream_output: bool = False, show_status: bool = False) -> Optional[bytes]:
+        data = b''
+        timeout = 0
+        max_len = len(delimiter)
+
+        while not timeout >= 100:
+            if data.endswith(delimiter):
+                return data
+            elif self.serial.inWaiting() > 0:
+                timeout = 0
+                data += self.serial.read(1)
+
+                if stream_output:
+                    sys.stdout.buffer.write(data[:-1])
+                    sys.stdout.buffer.flush()
+                    data = data[-max_len:]
+                elif show_status:
+                    self.transfer_status()
+            else:
+                timeout += 1
+                time.sleep(0.001)
+
+    def boot(self):
+        self.send_ctrl_c()
+        self.until_nothing_in_waiting()
+
+        if not self.read_until(self.send_ctrl_d()):
+            raise Exception('REPL: could not soft reboot')
+
+        data = b''
+        while not data.startswith(b'.\r\n>>>'):
+            if self.serial.inWaiting():
+                output = self.serial.read(1)
+                data = data[-5:] + output
+                sys.stdout.buffer.write(output)
+                sys.stdout.buffer.flush()
+
+        print(' ' + ('=' * 50))
+        print('REPL: was interrupted')
+
+    def __enter__(self):
+        self.send_ctrl_c()
+        self.until_nothing_in_waiting()
+
         for _ in range(0, 5): 
             if self.read_until(self.send_ctrl_a()):
                 break
 
             time.sleep(0.01)
         else:
-            raise Exception('REPL: could not enter')
+            raise Exception('Terminal: could not enter raw REPL mode')
-
-        if not self.read_until(self.send_ctrl_d()):
-            raise Exception('REPL: could not soft reboot')
-
-        if not self.read_until(self.send_ctrl_c()):
-            raise Exception('REPL: could not interrupt after soft reboot')
 
         return self.__terminal
 
@@ -300,24 +307,19 @@ class Pyboard(object):
 
     def __terminal(self, command: str, stream_output: bool = False) -> Optional[str]:
         command = textwrap.dedent(command)
-        # send input
-        if not isinstance(command, bytes):
-            command = bytes(command, encoding='utf8')
 
-        if not self.read_until(b'>'):
+        if not isinstance(command, bytes):
-            raise Exception('Terminal: prompt has been lost')
+            command = bytes(command, encoding='utf-8')
 
         for i in range(0, len(command), BUFFER_SIZE):
             if not stream_output:
                 self.transfer_status()
 
             self.serial.write(command[i: min(i + BUFFER_SIZE, len(command))])
-            time.sleep(0.0001)
 
         if not self.read_until(self.send_ok()):
             raise Exception('Terminal: could not execute command')
 
-        # catch output
         data = self.read_until(b'\x04', stream_output=stream_output, show_status=not stream_output)
 
         if not data:
@@ -609,8 +611,12 @@ class Picowatch(object):
         self.filesystem = FileSystem(pyboard)
         signal.signal(signal.SIGINT, lambda a, b: self.interupt())
 
+    def boot(self):
+        self.filesystem.pyboard.boot()
+
     def interupt(self):
         self.filesystem.pyboard.send_ctrl_c()
+        self.filesystem.pyboard.until_nothing_in_waiting()
 
     def terminal(self, command: str):
         self.filesystem.terminal(command, stream_output=True)
@@ -854,6 +860,8 @@ while True:
                         sys.exit('Picowatch Terminal disconnected!')
                     case ['help']:
                         print('TODO')
+                    case ['boot']:
+                        picowatch.boot()
                     case ['whois']:
                         print('TODO')
                     case ['reboot']: