Blog Bone Buses

Journal About

This website is created for keeping track of the Development of "Cape compatibility layer for BeagleBone Black and BeagleBone AI" project..

The idea of this project was to make the same user space examples work with both BeagleBone Black and BeagleBone AI, using the same references to drivers for peripherals assigned to the same pins between BeagleBone Black and BeagleBone AI. Also, Same DT overlays should work (whenever possible) for both BBB and BBAI, with updated uBoot cape manager DT overlays will be automatically loaded during boot.

Download BeagleBoard.org Latest Firmware Images to use Compatibility layer!

Installing Compatibility Layer

1. Update and Upgrade your system

2. Update Kernel

3. Update Bootloader

Achieved Milestones

Only major milestones has been shown here! you can see the entire Project milestones list on the BeagleBoard GSoC 2020 Projects elinux.org page here.

Created (when achievable) and tested compatibility layer for Bone Buses on BBBWL, BBB, and BBAI. Checkout links below for more detials like Header pin reference for each Bone Bus and Complimentary DT overlay which I created during GSoC time period.

1. LEDs	8. TIMER PWM
2. I2C	9. eCAP
3. SPI	10. eMMC
4. UART	11. LCD
5. CAN	12. eQEP
6. ADC	13. McASP
7. PWM	14. PRU

Created compatible overlays for these capes using the bone bus compatibility layer

Cape	Compatible Overlay
Load	BBORG_LOAD-00A2.dts
Motor	BBORG_MOTOR-00A2.dts
Relay	BBORG_RELAY-00A2.dts
Sero	BBORG_SERVO-00A2.dts
Comms	BBORG_COMMS-00A2.dts

Got 4.3" Display Cape to work on BBAI.

Cape	Overlay
4D Systems GEN4-4DCAPE-43CT-CLB	BBAI-4D4C-00A1.dts

Pull Requests

Only those PRs that are submitted during GSoC period are shown here. You can check my other PRs on the repo page for more info on Compatibility layer and related code.

beagleboard/BeagleBoard-DeviceTrees

PR	Status
Compatibility layer update2	Merged
Compatibility layer update1	Merged
Update Makefile to support overlays	Closed
Cape compatibility layer for BeagleBone Black and BeagleBone AI	Merged
Compatibility	Closed
add comments to am5729-beagleboneai.dts	Merged

beagleboard cloud9-examples

PR	Status
blinkR30 examples for PRU BBAI	Open
LoadCape: Example for toggling each load	Open
UART console	Merged
Correct sensors link and add displays link	Merged

beagleboard/bb.org-overlays

This repository hosted initial Compatible DT overlays but, along with new uBoot update the location of the compatible overlays has been updated to beagleboard/BeagleBoard-DeviceTrees. Some of the PRs I submitted are listed below, You can visit the bb.org-overlays repo to see more. The submitted code is no longer required to be merged!

PR	Status
Bone spi	Open
Bone i2c	Open
Bone uart	Open
Bone can	Open

jadonk/beagle-tester