BBB SPI device tree overlay, device number confusion

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1

I think I posted to the wrong section of the group. Apologies for this repost.

Running the latest angstrom image, with update, upgrade. Installing BB-SPIDEV0 seems to produce /dev/spidev1 which doesn’t seem right.
I was expecting /dev/spidev0 based on this http://elinux.org/BeagleBone_Black_Enable_SPIDEV#SPI0

Any ideas on this problem?

root@beaglebone:~# find /dev -iname spi
root@beaglebone:~# cat /sys/devices/bone_capemgr./slots
0: 54:PF—
1: 55:PF—
2: 56:PF—
3: 57:PF—
4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
5: ff:P-O-L Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
root@beaglebone:~# echo BB-SPIDEV0 > /sys/devices/bone_capemgr./slots
root@beaglebone:~# cat /sys/devices/bone_capemgr.*/slots
0: 54:PF—
1: 55:PF—
2: 56:PF—
3: 57:PF—
4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
5: ff:P-O-L Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
7: ff:P-O-L Override Board Name,00A0,Override Manuf,BB-SPIDEV0
root@beaglebone:~# find /dev -iname spi
/dev/spidev1.0
/dev/spidev1.1
root@beaglebone:~#

2

Matt,
I agree!!! It is very confusing, especially when you are trying to figure out which pin to probe!!
-frenchy

3

I see the same problems. Guys, will it work though using the pins described for spi0?

  1. február 22., vasárnap 5:18:34 UTC+1 időpontban Steve French a következőt írta:
4

It’s been a while since I was tinkering with this, but as I recall, the pin designations were as expected.

Is your SPI not working?

5

Don’t know, I don’t have the hardware to connect to yet