spi

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machine Module

Class SPI

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This class includes full support for using ESP32 SPI peripheral in master mode

Only SPI master mode is supported for now.

Python exception wil be raised if the requested spihost is used by SD Card driver (sdcard in spi mode).
If the requested spihost is VSPI and the psRAM is used at 80 MHz, the exception will be raised.
The exception will be raised if SPI cannot be configured for given configurations.

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Create the SPI instance object

spi = machine.spi(spihost, baudrate, polarity, phase, firstbit, sck, mosi, miso, cs, duplex)

Argument	Description
spihost	The hardware SPI host machine-SPI.HSPI (1) or machine.SPI.VSPI (2) can be used Default: 1
baudrate	SPI clock speed in Hz; Default: 1000000
polarity	SPI polarity; 0 or 1; Default: 0
phase	SPI phase; 0 or 1; Default: 0 polarity & phase defines the SPI operating mode (0-3): mode = (polarity<<1) + phase
firstbit	Send MSB or LSB bit first; default: MSB use constants machine.spi.MSB or machine.spi.LSB
sck	SPI SCK pin; Can be entered as integer pin number or machine.Pin object
moosi	SPI MISI pin; Can be entered as integer pin number or machine.Pin object
miso	SPI MISO pin; Can be entered as integer pin number or machine.Pin object
cs	Optional; SPI CS pin; Can be entered as integer pin number or machine.Pin object. If set, CS activation and deactivation is handled by the driver, if not set, SPI select and deselect must be handled by user
duplex	Select wether SPI operates in fullduplex or halfduplex mode In fullduplex mode SPI writes and reads data at the same time In halfduplex mode SPI writes data first, then reads data Default: True
bits	Not used, ignored if given

Only sck, mosi and miso are required, all the other arguments are optional and will be set to the default values if not given.