About three months ago I introduced the BBBMINI  a DIY Cape for the BeagleBone Black. The BBBMINI should make it easy to start with Ardupilot running on Embedded Linux. It also keep the DIY spirit, so it has no SMD parts to solder and only 0.1” pinheader to connect external hardware. So you do not have to struggle with DF13 connectors if you want to change the cable pinout.

I got good feedback, so I decided to make things easier which seems some people stuck with, when they build a BBBMINI.

The first thing is wiring a BBBMINI up on a Proto Cape board. It is prone to errors and remote support is difficult. The Proto Cape wiring is also not so reliable. So I get familiar with KiCad and designed the BBBMINI PCB.

BBBMINI PCB:

0.1” / 2.54mm pinheader

Use GY-9250 and GY-63 sensor breakout board (about 5$ to 9$ each with shipping from china)

Free SPI connector for additional sensors like a second IMU, ...

Free I2C connector for additional hardware like external Mag, LED Controller, Ultrasonic Rangefinder, ...

Free UART for additional hardware like Telemetry Radio or second GPS

CAN Bus TRX so BBBMINI is UAVCAN ready

12 PWM OUT

Extra PWM OUT for X-Quad

1 RC IN

All necessary parts to build a BBBMINI PCB is less than 35$ including the sensor boards

There is now a Rev 1.2 version of the PCB which fix a power issue of the Rev 1.0. The Rev 1.2 boards should receive me next week. After successful testing  all necessary files will be released on the BBBMINI GitHub page.

Also some people can not get all the Device Tree stuff to work or can not get a RT-Kernel up and running. So there is now a prebuild Image which you can write to a sdcard and direct boot from the sdcard with RT-Kernel and Device Tree already loaded at startup.  

Debian 8 with BBBMINI support:

GCC 4.9 so you can compile Ardupilot direct on the BeagleBone

Kernel 4.0.4 RT PREEMPT already installed and loaded at startup

Device Tree for BBBMINI already loaded at startup

Further information is available on the BBBMINI GitHub page.

Best regards

Mirko

Views: 2739

Comment by Mirko Denecke on June 16, 2015 at 9:23am

@Gary, Thomas, JB, Robert, Oliver and Marc. I should get about 10 pcbs next week. You can get one for free, because I only need 3 pcbs for me. May I will discover it is possible to sell them if there are more people interested in that pcb. Otherwise I will release the GERBER-Files so everyone (or small groups) can send it to a manufacturer, it is about 17$ for 10 pcbs (lead free) in good quality + 13$ for shipping.

Comment by Mirko Denecke on June 16, 2015 at 9:29am

@khancyr

Unfortunately Kernel 4.0.X does not have any capemanger support (there is capemanger support in 4.1.X ). So you have to modify the main dtb file which passes the bootloader to the kernel at boot time.

Comment by hamadivo on June 16, 2015 at 1:28pm

Hi,

the big issue with BBB the power management. i have lost more than 3 boards when i tried to use PRU/PWM.

I'm using PI A+ instead!

Thanks.

Comment by Mirko Denecke on June 16, 2015 at 1:53pm

@hamadivo

Can you explain that a little bit more. Seems to me that you wire your board the wrong way. How do you create 12 x PWM with RI A+ without external hardware?

Comment by hamadivo on June 16, 2015 at 2:37pm

i used my own program based on open source solutions.

I connected PRU 30 pin (i used only 8 pins)  to an isolator ( i tried different isolators).

the same issue like :

https://groups.google.com/forum/#!topic/beagleboard/FGeL6jzOcB0

https://groups.google.com/forum/#!topic/beagleboard/aXv6An1xfqI[1-25]

i think the HDMI pins created more inpedence (i'm not good on electronic) ...

With RI A+ i decided to use an external SPI/PWM module and i'm working on.

Comment by JB on June 17, 2015 at 7:29am

Well thank you very much for the offer Mirko! I'll PM you with my details!

If anyone wants to do a group buy for some more PCB's I'm in btw.

 

Comment by barban on June 29, 2015 at 9:43am

@Mirko Thanks for sharing your project. I am interested in your pcb too: so I am open to consider to join to a group of buyers together with others guys.  Please let me know.

Comment by Jon Paul Llamas on July 20, 2015 at 2:50am

Hello all, I am working with some Teens in an after school program, and this project is on the top of our list..  We would also like to pitch in on a group of buyers.  We will watch this thread for updates,, thank you

RcHobbyBuddies

Comment by Mirko Denecke on July 20, 2015 at 2:58am

Hi Jon,

feel free to join the BBBMINI User Group. There is also a buyers thread.

Best regards, Mirko

Comment by Enrico on March 17, 2017 at 12:44am

Hi Mirko,

Why don't we move to 4.9 kernel ?

Bye, Enrico.

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