SPI in Beaglebone

[Rai32]

Hi, I'm trying to communicate an ADC with the "beaglebone" using SPI communication protocol, and I only find documentation about beagleboard.

Could I use the "beagleboard" docs about how to setup the kernel and the SPI for the beaglebone??

This the link I've red about the SPI in the beagleboard.

http://www.brianhensley.net/2012/02/spi-working-on-beagleboard-xm-rev-c.html

Thanks in advance.

[Koen Kooi]

spidev is enabled by default in angstrom images for beaglebone.

[Rai32]

I searched the spidev in 02 14 12 date SD Card received from beaglebone and I can't find nothing about SPI.

I tried to download the Angstrom-Cloud9-IDE-GNOME-eglibc-ipk-v2012.05-beaglebone-2012.05.09.img.xz, but the system doesn't run.

Is spidev present on 2012.05.09 image?

[Koen Kooi]

Op 18 mei 2012, om 17:54 heeft Rai32 het volgende geschreven:

> I searched the spidev in 02 14 12 date SD Card received from beaglebone and I can't find nothing about SPI.
> I tried to download the Angstrom-Cloud9-IDE-GNOME-eglibc-ipk-v2012.05-beaglebone-2012.05.09.img.xz, but the system doesn't run.
> Is spidev present on 2012.05.09 image?

yes

[Jan Szymanski]

Hi Koen,

I have the latest image
root@beaglebone:~# uname -a
Linux beaglebone 3.2.16 #1 Wed May 9 11:28:21 CEST 2012 armv7l GNU/Linux

but I have no spidev under /dev
root@beaglebone:~# ls /dev | grep spi
root@beaglebone:~#

root@beaglebone:~# find / -name 'spidev*'
/lib/modules/3.2.16/kernel/drivers/spi/spidev.ko
/usr/include/linux/spi/spidev.h
root@beaglebone:~#

How to enable the spidevx.y node?

Jan

[Brian Adams]

Jan,

User space spi is a kernel module that is not included by default. Make sure that you have the spidev kernel module loaded. 

root@beaglebone:~/spi# lsmod

Module                  Size  Used by

r8712u                119262  0 

spidev                  3888  0 

...

If you don't have it, you can 'opkg install kernel-module-spidev'. Once that module is loaded, you should see /dev/spidev1.0.

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[Jan Szymanski]

Brian,

 Still no luck, I must be missing something.

I did:
root@beaglebone:~# opkg install kernel-module-spidev
Package kernel-module-spidev (3.2.16-r11n+gitr720e07b4c1f687b61b147b31c698cb6816
d72f01) installed in root is up to date.

root@beaglebone:~# modprobe spidev
root@beaglebone:~# lsmod
Module                  Size  Used by
spidev                  3888  0
ip_tables               7830  0
x_tables               14348  1 ip_tables
g_mass_storage         24018  0
rfcomm                 24259  0
ircomm_tty             14073  0
ircomm                  8407  1 ircomm_tty
irda                   85557  2 ircomm_tty,ircomm
hidp                   10152  0
bluetooth             109714  4 rfcomm,hidp
rfkill                 14605  2 bluetooth
ipv6                  210442  14
root@beaglebone:~#

root@beaglebone:~# update-modules

root@beaglebone:~# find / -name 'spidev*'
/lib/modules/3.2.16/kernel/drivers/spi/spidev.ko

/sys/bus/spi/drivers/spidev
/sys/class/spidev
/sys/module/spidev
/usr/include/linux/spi/spidev.h
root@beaglebone:~# ls /dev/spi*
ls: cannot access /dev/spi*: No such file or directory
root@beaglebone:~#

so still no /dev/spidev1.0. ...

Thanks for your help

Jan

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[Koen Kooi]

It would be spidev2.0, but let me guess: you have a cape connected with an 0x57 I2c address. Could you past the output of:

dmesg | grep -i cape

regards

Koen

[Jan Szymanski]

Hi Koen,

 I have no cape connected

root@beaglebone:~# dmesg | grep -i cape
[    0.306881] BeagleBone cape EEPROM: could not read eeprom at address 0x54
[    0.366877] BeagleBone cape EEPROM: could not read eeprom at address 0x55
[    0.426876] BeagleBone cape EEPROM: could not read eeprom at address 0x56
[    0.486877] BeagleBone cape EEPROM: could not read eeprom at address 0x57
[    0.486894] BeagleBone cape: exporting ADC pins to sysfs
root@beaglebone:~#

BTW,
I tried the previous image and had no luck either
root@beaglebone:~# uname -a
Linux beaglebone 3.2.14 #1 Mon Apr 9 12:21:19 CEST 2012 armv7l GNU/Linux

root@beaglebone:~# opkg install kernel-module-spidev

Package kernel-module-spidev (3.2-r10d+gitre8004dad869568692ca2a45c04e8464ce48cc
4d7) installed in root is up to date.
root@beaglebone:~# modprobe spidev
FATAL: Error inserting spidev (/lib/modules/3.2.14/kernel/drivers/spi/spidev.ko)
: Invalid module format
root@beaglebone:~#

Thanks

Jan

[Ramon Benavent]

I have the same problem:

root@beaglebone:/# uname -a

Linux beaglebone 3.2.16 #1 Wed May 9 11:28:21 CEST 2012 armv7l GNU/Linux

root@beaglebone:/# opkg install kernel-module-spidev

Package kernel-module-spidev (3.2-r11f+gitr31944a82681a0e7ab6cc3e069c30eddc5042e3e8) install.

root@beaglebone:/# modprobe spidev

root@beaglebone:/# lsmod

Module                  Size  Used by

spidev                  3888  0 

ip_tables               7830  0 

x_tables               14348  1 ip_tables

g_mass_storage         24018  0 

rfcomm                 24259  0 

ircomm_tty             14073  0 

ircomm                  8407  1 ircomm_tty

irda                   85557  2 ircomm_tty,ircomm

hidp                   10152  0 

bluetooth             109714  4 rfcomm,hidp

rfkill                 14605 

But I haven't /dev/spi nor spidev.*

Thanks foryour time.

2012/5/23 Jan Szymanski <jan.sz...@uts.edu.au>

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[Jorgen]

I had the same problem, but after a "opkg update ; opkg upgrade" and a reboot, it seems to work fine.

2012/5/23 Jan Szymanski <jan.sz...@uts.edu.au>

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[Christopher De Vries]

I have been having this same trouble. It looks like this blog: http://waxpraxis.tumblr.com/post/19277633509/ubuntu-on-the-beaglebone-with-userland-spi has a solution a disk image which you can load directly onto the SD card. I am going to try downloading it now.

[Koen Kooi]

Op 26 mei 2012, om 08:01 heeft Christopher De Vries het volgende geschreven:

> I have been having this same trouble. It looks like this blog: http://waxpraxis.tumblr.com/post/19277633509/ubuntu-on-the-beaglebone-with-userland-spi has a solution a disk image which you can load directly onto the SD card. I am going to try downloading it now.

Or you can just opkg upgrade to the new kernel in angstrom

[Dhiraj]

Hi, even i have the same problem. 

i even did the opkg update  and opkg upgrade but it ran out of space.

 did anyone got the spi device working ? or even the kernel image the has a working spi device driver.

thank you all

[Steve]

1. setup an 8gb sdcard using the images from may 09
2. use gparted to resize the Angstrom partition to fill the rest of the card
3. then do the upgrade...

[Steve]

Also...I've found that dd if=/dev/zero of=/dev/"insert sdcard value"

 mine is mmcblk0 

any sdcard before you image it. Tends to be a more reliable image

[Janek]

check the post here: https://groups.google.com/forum/?fromgroups#!searchin/beagleboard/Frank/beagleboard/7xRo7ovknhs/JO2xYlc2DdoJ

The tmpfs is very small. It's better to use the tmp-dir option, e.g.

  opkg --tmp-dir ~ update
  opkg --tmp-dir ~ upgrade
  opkg --tmp-dir ~ install something

Jan

[Dhiraj]

hi Janek,

            thank you for the valuable information. the trick worked i am able to see the spidev2.0 in my /dev list.

regards

Dhiraj