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pins
is a 4 or 2 item list indicating the TXD, RXD, RTS and CTS pins (in that order).
Any of the pins can be
None
if one wants the UART to operate with limited functionality.
If the RTS pin is given the the RX pin must be given as well. The same applies to CTS.
When no pins are given, then the default set of TXD (P1) and RXD (P0) pins is taken,
and hardware flow control will be disabled. If
pins=None
, no pin assignment will be
made.
uart.deinit()
Turn off the UART bus.
uart.any()
Return the number of characters available for reading.
uart.read([nbytes])
Read characters. If
nbytes
is specified then read at most that many bytes.
Return value: a bytes object containing the bytes read in. Returns
None
on timeout.
uart.readall()
Read as much data as possible.
Return value: a bytes object or
None
on timeout.
uart.readinto(buf[, nbytes])
Read bytes into the
buf
. If
nbytes
is specified then read at most that many bytes.
Otherwise, read at most
len(buf)
bytes.
Return value: number of bytes read and stored into
buf
or
None
on timeout.
uart.readline()
Read a line, ending in a newline character. If such a line exists, return is immediate. If the
timeout elapses, all available data is returned regardless of whether a newline exists.
Return value: the line read or
None
on timeout if no data is available.
uart.write(buf)
Write the buffer of bytes to the bus.
Return value: number of bytes written or None on timeout.
uart.sendbreak()
5.2.1.8 UART
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