SPI random crash "Unexpected IRQ during transmit phase!"

[belsource]

I tried:

sudo modprobe -r spi_bcm2708
sudo modprobe spi_bcm2708

but actually I have spi_bcm2835 module (Raspbian on RPi2), so I used spi_bcm2835 in command

Here is my problem:

I can 100% reproduce crash when I transmit 2-3 lines in one time like:

tx.write(reverse("s0|data"));
tx.write(reverse("s1|data"));

[belsource]

Script works 1-10 hours and then:

fs.js:500
return binding.open(pathModule._makeLong(path), stringToFlags(flags), mode);
^
Error: EACCES, permission denied '/sys/class/gpio/gpio25/value'
at Error (native)
at Object.fs.openSync (fs.js:500:18)
at Object.exports.connect (/var/www/html/node_modules/pi-pins/index.js:29:21)
at Object.exports.connect (/var/www/html/nodejs/index.js:32:19)
at Object. (/var/www/html/nodejs/server.js:8:11)
at Module._compile (module.js:460:26)
at Object.Module._extensions..js (module.js:478:10)
at Module.load (module.js:355:32)
at Function.Module._load (module.js:310:12)
at Function.Module.runMain (module.js:501:10)
error: Forever detected script exited with code: 1
error: Script restart attempt #1
fs.js:500
return binding.open(pathModule._makeLong(path), stringToFlags(flags), mode);
^
Error: EACCES, permission denied '/sys/class/gpio/gpio7/value'
at Error (native)
at Object.fs.openSync (fs.js:500:18)
at Object.exports.connect (/var/www/html/node_modules/pi-pins/index.js:29:21)
at Object.exports.connect (/var/www/html/nodejs/index.js:33:46)
at Object. (/var/www/html/nodejs/server.js:8:11)
at Module._compile (module.js:460:26)
at Object.Module._extensions..js (module.js:478:10)
at Module.load (module.js:355:32)
at Function.Module._load (module.js:310:12)
at Function.Module.runMain (module.js:501:10)
error: Forever detected script exited with code: 1

[natevw]

Hmm, interesting. The error messages really point to a problem with GPIO access (for which this library uses my separate pi-pins module) rather than SPI, so I guess it's not too surprising that the kernel module trick does not make a difference.

However, it looks you are trying to use GPIO07 for your IRQ pin? This is the SPI_CE0_N pin for /dev/spidev0.0Correction: it is a SPI pin, but not for spidev0.0 but still… so I suspect this could be part of the problem. Which pins is your nRF24 module connected to on the RasPi header? You should have a separate pin for IRQ than for its CSN (which should be SPI_CE0_N which is physical pin 24 on all models afaik:

Hope this helps!

[belsource]

So, should I remove nrf24 IRQ pin?

[belsource]

Without IRQ <-> GPIO7 - it doesn't work at all

[belsource]

I still dont unserstand what is happening.. nodejs crashes every 1-24 hours randomly

natevw , what do u use for nodejs background process? I use "forever" ...

Script works 14 hours even with errors, it was restarted:

[natevw]

I do not recommend disconnecting IRQ pin, it currently can lead to strange issues e.g. #30. I may have spoken too soon, flipping between pinout diagrams and got confused — your original pinouts may not necessarily have been wrong. Somebody else just filed natevw/pi-spi#19 so I wonder if there is some issue with the new kernel drivers? [Note that that is a SPI issue and this is a GPIO issue though.] Or are you sure you don't have other processes that are occasionally trying to access GPIO and conflicting somehow?

You can use whatever you want for process restarts, forever or node-supervisor or whatever and in theory it shouldn't make a difference to this issue. (I tend to use node-foreman and node-supervisor in development, Ubuntu's upstart in production and something like while sleep 1; node project/myscript; done; for personal stuff when I'm too hurried to find back the upstart documentation.)