Re: [beagleboard] problem loading SPI overlay

2017-06-13 Thread Robert Nelson
On Tue, Jun 13, 2017 at 8:11 PM, mzimmers  wrote:
> Hi -
>
> I really hate to ask this question here, since I'm sure I'm doing something
> obviously wrong, but...I'm trying to duplicate Dr. Molloy's example in his
> book, and I'm getting an error:
>
> mzimmers@beaglebone:/lib/firmware$ pwd
> /lib/firmware
> mzimmers@beaglebone:/lib/firmware$ cat $SLOTS
>  0: PF  -1
>  1: PF  -1
>  2: PF  -1
>  3: PF  -1
>  4: P-O-L-   0 Override Board Name,00A0,Override Manuf,cape-universaln

cape universal is already loaded, thus the pins are taken..

open /boot/uEnv.txt

remove the:

cape_universal=enabled

option

or just use "config-pin" to set the pins as spi

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

-- 
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Re: [beagleboard] problem loading SPI overlay

2017-06-14 Thread Robert Nelson
On Wed, Jun 14, 2017 at 9:01 AM, Michael Zimmers  wrote:
> Hi, Robert - thanks for the tip. The echo command no longer fails, but the 
> $SLOTS file isn’t updated. Any other suggestions?
>

type:

dmesg | tail

and see what happend..

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

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Re: [beagleboard] problem loading SPI overlay

2017-06-14 Thread Robert Nelson
On Wed, Jun 14, 2017 at 9:08 AM, Michael Zimmers  wrote:
> Oh, interesting…I misspoke: the overlay was successful, but instead of 
> appending it to the list, it replaced entry #4. Not what I was expecting from 
> Dr. Molloy’s example. Did this happen because I disabled that universal entry?

It didn't replace anything, the first 4 entries are tied to the cape
eeprom standard, anything after that is just a list of virtual capes..

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

-- 
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