Closed PieterGit closed 7 years ago
Indeed, my kernel configuration doesn't have GPIO_SYSFS enabled.
Regarding to a log on the link I might give a hint: GPIO export works exactly how it's designed in upstream kernel. If libmraa doesn't support a standard way of doing things it should be fixed.
For me it looks like a completely problem of libmraa. I never used that library and never will.
By the way, I used an example to set SPI5 output on from Emutex page and it works for me (on Edison/Arduino). So, it might be also some issues regarding to absence of PCA9555L GPIO expanders, though they are sitting on GPIO 200+ lines.
Okay, I got what's wrong. Thanks for report. UPDATE. The problematic set of GPIOs is Family 7 (I2C, 14 pins). They are located in secure block in FLIS and this requires special write access to them. Upstream solution would be ready in v4.12-rc1. It's not a big deal, but it requires to do some infrastructure changes. I will look what I can do sooner.
@andy-shev : That would be great! I didn't know linux kernel planning for 4.12-rc1 already exists. Thanks for your looking into the problem. If there is anything I can test or debug, please let me know. A lot of diabetes users of openaps will be very happy with such as a solution, because it can let openaps control their insulin pump. Thanks in advance.
U guys use it for insulin pumps? Holy cow, and I thoughts controlling a greenhouse is risky cause I might ruin some salad...
Hold on, I just checked schematics and there is no such GPIO available to the user. Even for the rest 4 pins (I2C1 and I2C6) there is no possibility to switch their mode to something else (in original Edison BSP).
So, back to square 1, i.e. these are clearly 2 bugs: a) official Edison BSP is buggy, b) libmraa is crap.
P.S. But thanks for report anyway, I found one (minor) bug in the code because of this report.
Hi @andy-shev
I am trying to get a TI CCxxxx chip working on an Intel Edison Explorerboard (see https://github.com/EnhancedRadioDevices/915MHzEdisonExplorer ) with your eds branch 4.10rc4.
I now have the
/dev/spidev5.1
file and I also have a/sys/class/gpio/export
fileUnfortunately accessing the GPIO pin 23 fails, e.g.:
This works fine on a Yocto image. Can you explain why I can't access the spi serial pin?
My libmraa version v1.5.1-18-ge386300
This is also discussed on the Intend-to-Bolus gitter, see: https://gitter.im/nightscout/intend-to-bolus?at=588532efd43728124e8ef673 . @ecc1 and @oskarpearson helped me add some of the necessary kernel parameters. I enabled
CONFIG_I2C_GPIO
,CONFIG_SPI_GPIO
,CONFIG_GPIO_SYSFS
on your x86_64_defconfigThanks in advance,
Pieter