class SPIBus(object):
"""SPI bus access."""
def __init__(self, freq, sck, sdo, sdi=None, spidev=None):
_mi = Pin(sdi) if sdi else None
_mo = Pin(sdo)
_sc = Pin(sck)
if spidev == None:
self._spi = SPI(baudrate=freq, sck=_sc, mosi=_mo, miso=_mi)
elif spidev >= 0:
self._spi = SPI(spidev, baudrate=freq, sck=_sc, mosi=_mo, miso=_mi)
else:
self._spi = SoftSPI(sck=_sc, mosi=_mo, miso=_mi)
def deinit(self):
self._spi.deinit()
@property
def bus(self):
return self._spi
def write_readinto(self, wbuf, rbuf):
self._spi.write_readinto(wbuf, rbuf)
def write(self, wbuf):
self._spi.write(wbuf)
# phase=0 means sample on the first edge of SCK, phase=1 means the second spi = SoftSPI(baudrate=100000, polarity=1, phase=0, sck=Pin(0), mosi=Pin(2), miso=Pin(4)) spi.init(baudrate=200000) # set the baudrate spi.read(10) # read 10 bytes on MISO spi.read(10, 0xFF) # read 10 bytes while outputting 0xff on MOSI buf = bytearray(50) # create a buffer spi.readinto(buf) # read into the given buffer (reads 50 bytes in this case) spi.readinto(buf, 0xFF) # read into the given buffer and output 0xff on MOSI spi.write(b"12345") # write 5 bytes on MOSI buf = bytearray(4) # create a buffer spi.write_readinto(b"1234", buf) # write to MOSI and read from MISO into the buffer spi.write_readinto(buf, buf) # write buf to MOSI and read MISO back into buf # Hardware SPI from machine import Pin, SPI hspi = SPI(1, 10000000) hspi = SPI(1, 10000000, sck=Pin(14), mosi=Pin(13), miso=Pin(12)) vspi = SPI(2, baudrate=80000000, polarity=0, phase=0, bits=8, firstbit=0, sck=Pin(18), mosi=Pin(23), miso=Pin(19)) # Software I2C from machine import Pin, SoftI2C i2c = SoftI2C(scl=Pin(5), sda=Pin(4), freq=100000)
