Read size bytes from the serial port. If a timeout is set it may return less characters as requested. With no timeout it will block until the requested number of bytes is read.
(self, size=1)
| 150 | return self._port_handle.BytesToRead |
| 151 | |
| 152 | def read(self, size=1): |
| 153 | """Read size bytes from the serial port. If a timeout is set it may |
| 154 | return less characters as requested. With no timeout it will block |
| 155 | until the requested number of bytes is read.""" |
| 156 | if not self._port_handle: raise portNotOpenError |
| 157 | # must use single byte reads as this is the only way to read |
| 158 | # without applying encodings |
| 159 | data = bytearray() |
| 160 | while size: |
| 161 | try: |
| 162 | data.append(self._port_handle.ReadByte()) |
| 163 | except System.TimeoutException, e: |
| 164 | break |
| 165 | else: |
| 166 | size -= 1 |
| 167 | return bytes(data) |
| 168 | |
| 169 | def write(self, data): |
| 170 | """Output the given string over the serial port.""" |