Thanks!
Does the cape-universaln overlay play nice with I2C? I'm having trouble
with it being unable to read /dev/i2c-2 (which is created after loading
cape-universaln). Trying to run the following fails, both by taking a long
time to run (about 1 second per address) and also by not finding my devices
at 0x27, 0x48, and 0x77:
root@beaglebone:~# i2cdetect -y -r 2
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
The expected result (tested against the BB-I2C1 overlay) is the command
returns quickly, and find a device at those three addresses.
root@beaglebone:~# echo BB-I2C1 > /sys/devices/bone_capemgr.9/slots
root@beaglebone:~# i2cdetect -y -r 2
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- 27 -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- 48 -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- 77
On Sunday, December 28, 2014 12:55:31 PM UTC-5, RobertCNelson wrote:
>
> On Sun, Dec 28, 2014 at 9:32 AM, Ian Woloschin <[email protected]
> <javascript:>> wrote:
> > So where'd they go? Or, what's the naming convention of them?
> >
> > I've written a simple Python library to use for GPIO control on my
> projects,
> > and I want the whole thing to be automated. The sysfs part is easy, but
> I
> > couldn't find any overlays, and I'd rather not make my own overlay for
> each
> > GPIO pin.
>
> You can view the whole list in System-map
>
> cat /boot/System.map-`uname -r` | dtbo
>
> c0559bec r _fw_cape_bebopr_R2_dtbo_bin
> c055c3ac r _fw_cape_bebopr_ena_R2_dtbo_bin
> c055ead4 r _fw_cape_bebopr_brdg_R2_dtbo_bin
> c0561020 r _fw_cape_bone_2g_emmc1_dtbo_bin
> c0561514 r _fw_cape_bone_adafruit_lcd_00A0_dtbo_bin
> c0562098 r _fw_cape_bone_dvi_00A0_dtbo_bin
> c0562a14 r _fw_cape_bone_dvi_00A1_dtbo_bin
> c0563918 r _fw_cape_bone_dvi_00A2_dtbo_bin
> c056429c r _fw_cape_bone_hexy_00A0_dtbo_bin
> c0565300 r _fw_cape_bone_lcd3_00A0_dtbo_bin
> c05667d0 r _fw_cape_bone_lcd3_00A2_dtbo_bin
>
>
> Regards,
>
> --
> Robert Nelson
> http://www.rcn-ee.com/
>
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