Comments (3)
This is my understanding what xfer should do. Set CS to active, transfer given bytes and deassert at the end.
from py-spidev.
The difference between xfer and xfer2 is the handling of CS at the end of the transmission: deassert it or leave it active.
from py-spidev.
I know I'm late to the party, but I've been digging through the code lately. I'm pretty sure there is no difference between xfer
and xfer2
unless the library is compiled with -DSPIDEV_SINGLE
. Otherwise these two methods are functionally identical.
from py-spidev.
Related Issues (20)
- Reading from SPI 0.0 is always zero HOT 3
- CS line double pulsing HOT 3
- spurious low pulse on CS0 HOT 28
- SPI CE0 bounce problem HOT 1
- after close and recreate got Bad file decriptor HOT 1
- The CS_HIGH handling code triggers a lockup on Raspberry Pi in 5.10 HOT 3
- [RPi 4] Spurious CS pulse after transfer HOT 3
- Type interface to writebytes not clear HOT 1
- RX buffer overwrites the TX buffer in 'xfer2' HOT 2
- "xfer2"/"xfer" command erases slave data / slave is unable to respond HOT 6
- support for python 3.9.4 HOT 1
- Please tag 3.5 version
- Unexpected SCK behavior
- Installation Python Spidev fails on Alpine Linux aarch64 HOT 3
- How to define a GPIO pin of Raspberry Pi while I'm using spidev lib? HOT 1
- Install failing on macos [missing linux/spi/spidev.h] HOT 1
- Supporting with-statements
- The open() method is not well suited to hot-plugged SPI device controllers (e.g. USB, Thunderbolt, PCIe and similar situations). HOT 2
- Could not build wheels for spidev HOT 2
- Quad and Dual format support for Synopsys Enhanced SPI controllers
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