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beagleboard / beaglebone-black

Design and Document files for the BeagleBone Black from BeagleBoard.org
https://git.beagleboard.org/beagleboard/beaglebone-black
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BeagleBone Cape Board Design without EEPROM #21

Open NabilaTasnim opened 4 months ago

NabilaTasnim commented 4 months ago

I am confused about one thing. If I design a BeagleBone Cape Board without EEPROM and use it with BeagleBone Black, then will that Cape Board work just like a PCB board? @RobertCNelson @jadonk @pdp7 @MarkAYoder

RobertCNelson commented 4 months ago

If you don't install an eeprom, it just won't auto-load... Nothing stopping from writing directions on using an overlay for your cape.

NabilaTasnim commented 4 months ago

@RobertCNelson I was thinking if I connect the cape board over the BeagleBone Black and control the GPIO pins of the BeagleBone Black, will I be able to use the cape board? I meant, can I then use the cape board just like the breadboard or protoboard?

RobertCNelson commented 4 months ago

eeprom is only used for 'auto' detection of what board is plugged into the bbb.. as long as you know what board is plugged in your can load the appropriate overlay

NabilaTasnim commented 4 months ago

But I want the cape to serve the purpose of the PCB board. It does not need to be intelligent. The cape’s header pins will be like jumper wires, so if I enable one GPIO pin of BeagleBone Black, the corresponding header pin of the connected cape will also be enabled like the jumper wire. So, is it possible to use the header pins of the cape like the jumper wires? @RobertCNelson

RobertCNelson commented 4 months ago

The only intelligent feature is the erprom. If you don't have eeprom, you can write your own overlay to configure the pin in any mode that is supported.

adhishhh commented 3 months ago

Yes, your Cape Board without EEPROM will work like a PCB with BeagleBone Black. You'll just need to create a Device Tree Overlay (DTO) for manual configuration instead of automatic detection via EEPROM. This lets you control the Cape's functionalities through BeagleBone Black's software, similar to how you'd use jumper wires on a breadboard.