circuitpython/docs/library/pyb.USB_VCP.rst

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2014-10-31 18:21:37 -04:00
class USB_VCP -- USB virtual comm port
======================================
The USB_VCP class allows creation of an object representing the USB
virtual comm port. It can be used to read and write data over USB to
the connected host.
Constructors
------------
.. class:: pyb.USB_VCP()
Create a new USB_VCP object.
Methods
-------
.. method:: usb_vcp.setinterrupt(chr)
Set the character which interrupts running Python code. This is set
to 3 (CTRL-C) by default, and when a CTRL-C character is received over
the USB VCP port, a KeyboardInterrupt exception is raised.
Set to -1 to disable this interrupt feature. This is useful when you
want to send raw bytes over the USB VCP port.
.. method:: usb_vcp.isconnected()
Return ``True`` if USB is connected as a serial device, else ``False``.
.. method:: usb_vcp.any()
Return ``True`` if any characters waiting, else ``False``.
.. method:: usb_vcp.close()
.. method:: usb_vcp.read([nbytes])
.. method:: usb_vcp.readall()
.. method:: usb_vcp.readline()
.. method:: usb_vcp.recv(data, \*, timeout=5000)
Receive data on the bus:
- ``data`` can be an integer, which is the number of bytes to receive,
or a mutable buffer, which will be filled with received bytes.
- ``timeout`` is the timeout in milliseconds to wait for the receive.
Return value: if ``data`` is an integer then a new buffer of the bytes received,
otherwise the number of bytes read into ``data`` is returned.
.. method:: usb_vcp.send(data, \*, timeout=5000)
Send data over the USB VCP:
- ``data`` is the data to send (an integer to send, or a buffer object).
- ``timeout`` is the timeout in milliseconds to wait for the send.
Return value: number of bytes sent.
.. method:: usb_vcp.write(buf)