Pycom FiPy, Руководство пользователя, Страница: 274 / 496

from machine import UART
# this uses the UART_1 non-default pins for TXD and RXD (``P20`` and ``P21``)
uart = UART( 1 , baudrate= 9600 , pins=( 'P20' , 'P21' ))
uart.write( 'hello' )
uart.read( 5 ) # read up to 5 bytes
Quick Usage Example using non-default pins (TXD/RXD
and flow control)
from machine import UART
# this uses the UART_1 non-default pins for TXD, RXD, RTS and CTS (``P20``, ``P21``, `
`P22``and ``P23``)
uart = UART( 1 , baudrate= 9600 , pins=( 'P20' , 'P21' , 'P22' , 'P23' ))
uart.write( 'hello' )
uart.read( 5 ) # read up to 5 bytes
Constructors
class machine.UART(bus, ...)
Construct a UART object on the given
bus
.
bus
can be
0, 1 or 2
. If the
bus
is not
given, the default one will be selected (
0
) or the selection will be made based on the given
pins.
On the GPy/FiPy UART2 is unavailable because it is used to communicate with the
cellular radio.
Methods
uart.init(baudrate=9600, bits=8, parity=None, stop=1, * , timeout_chars=2, pins=(TXD,
RXD, RTS, CTS))
Initialise the UART bus with the given parameters:
baudrate
is the clock rate.
bits
is the number of bits per character. Can be
5, 6, 7 or 8
.
parity
is the parity,
None
, UART.EVEN or UART.ODD.
stop
is the number of stop bits,
1 or 2
.
timeout_chars
Rx timeout defined in number of characters. The value given here will
be multiplied by the time a characters takes to be transmitted at the configured
baudrate
.
5.2.1.8 UART
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