Tiny Core Base > Raspberry Pi

piCore for DUMMIES

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mocore:
its "nice" the newer pi have alternative options for booting sans SD card  (older ver's (can be configured to) just require flash to boot the hw)

wrt flash memory ... https://forum.tinycorelinux.net/index.php/topic,26482.msg170797.html#msg170797

 this echo's in the hollow betwixt my ears
"you're not really storing your data you're storing a probabilistic approximation of your data" - Exploitation of an SD Memory Card
 :'(

Yleisajattelija:
Replacing SoC rosolve some problems, if Broadcomm will deliver JTAG -first/second stage bootloader spesificcation. There is ofcourse some security bits, which may be se or not, depending of few issues,....

There is some limux ports for other HW:

https://www.olimex.com/

https://www.myirtech.com/

Olimex use Alwinner chips, and Alwinner publish some data for JTAG (page 229):

https://www.olimex.com/Products/SOM/A20/_resources/A20-User-Manual-2013-03-22.pdf

 

Yleisajattelija:
In this case, I need some add-on boards for Rasberry I/O bus. There is many add-on boards on ebay for Rasberry, but what is important is piCore compatible drivers. Nowdays linus uses devicetree blob:

https://www.kernel.org/doc/html/latest/devicetree/usage-model.html

....which was developed in linux PowerPC port:

https://docs.kernel.org/arch/powerpc/bootwrapper.html

That device tree mechanism works well is PowerPC environment, but as Linus has said "armel is awful mess"...

...but this thread is for newbies, so some questions must be askeed first... 

Yleisajattelija:
QYSA: Why they discuss ARM problems in kernel device-tree-documentation and why this in important for newbie?
A: Well, ARM is not a problem but ARM SoC:s are. There is several reasons for that mess and result is that your Rasperry Pi add-on-board drivers are probably not working with piCore.

QYSA: What boards and drivers are working with piCore?
A: Let's hope piCore development group can tell that to us... 

Yleisajattelija:
For example this:

https://www.waveshare.com/wiki/High-Precision_AD/DA_Board

For Rasberry Pi OS that driver probably works.

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