Comments (3)
@pelwell Indeed, i can confirm this causes an issue with latest kernels
from py-spidev.
For those looking for a quick kernel rollback, reverting using https://github.com/Hexxeh/rpi-firmware/commits/master
Note that rpi3b was not working with kernel 5.4.83, so it was reverted to 5.4.79
- for rpi3b+:
sudo rpi-update 0642816ed05d31fb37fc8fbbba9e1774b475113f
- for rpi4b:
sudo rpi-update 453e49bdd87325369b462b40e809d5f3187df21d
from py-spidev.
There are two bugs here.
_spi.cshigh
appearsTrue
when it actually should beFalse
(SPI standard) by default.- Attempting to set it
False
crashes the program.
So the entirely reasonable-looking code:
if self._spi.cshigh:
self._spi.cshigh = False
hits both bugs and dies.
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
- [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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from py-spidev.