Questions tagged [beaglebone-black]

The 'black' is a version of the Beagle board, a single-board computer powered by an ARM CPU running Linux.

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What is this communication standard I'm seeing? It looks like UART but with a third line

What the title says. I looked into flow control, as that seems like the obvious answer to "what are these extra lines in my UART communication?" But what I'm seeing doesn't really look like flow ...
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1k views

Design Review: 3.3V Logic to 12V Logic (Uni-directional and Bi-directional)

I'm looking for feedback and improvements on my design below. Specific questions are at the end. I created this as an attempt to answer my own, previous question. From my feedback there, it seems like ...
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1answer
47 views

Why can't the bootloader save and log messages for us to view later [closed]

I have a problem whereby a remote BeagleBone device is taking hours to boot up. When it does, I don't see any problems in the kernel boot logs such as journalctl -b or journalctl -b -1 Without having ...
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3k views

BeagleBone Serial Communication

I have a problem seeing characters written in /dev/ttyS8 on my PC terminal with this C code: ...
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732 views

Why is P9_14 GPIO input using Adafruit's library giving me -1227689624 on my BeagleBone Black?

I know I should really be writing my own GPIO libraries so I know how they work and can fix them when they break, but for now I am following a simple tutorial using Adafruit's GPIO library, which I ...
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Purpose for Shunt Resistor on Opto Isolator Input?

I was looking at a BeagleBone Black Cape and became curious on an input circuit to the BeagleBone GPIO (used for a NPN proximity sensor). Upon further reverse designing, I notice a // 220Ω shunt ...
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BeagleBone Black Driving NFETs w/GPIO

In short, I want to drive some NFETs directly from some of the BBB's GPIO. 3 of the NFETs will pass 1-3 Amps of D-S current and 1 NFET will pass <1 Amp from the D-S. As you may know the BBB's ...
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3.3V Logic to 12V Logic (Uni-directional and Bi-directional) [duplicate]

I'm looking to understand how to convert between 3.3V logic and 12V logic, in each direction individually and bidirectionally. I know this question has been asked before, but I'm overwhelmed with the ...
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109 views

Any Issues Getting BeagleBone Black Wireless to run off of LiPo with Diode Fix?

This helpful question pointed me into the right direction for powering the BBB with a 3.7V LiPo battery. However, as this answer demonstrated, I won't be able to give the WiFi/BT module power in doing ...
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Building Starterware projects in CCSv8 using GCC

I'm new to BeagleBone and Code Composer Stadio; I want to build a Starterware Project in CCSv8; I installed Cygwin GCC and Linaro in my computer; I follow the instruction of below TI Wiki page and ...
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BBB Flashing Loop

So generally I have no problem flashing my BBB with the SD I have. I do it all the time, and it works on most board. However occionally it gets stuck in this "loop". It will flash the device ...
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131 views

Systems similar to TI's PRUs [closed]

I have been working with TI's PRUs on the am335x, equipped on the BeagleBone Black. I would like to know if other hardware manufactures offer similar systems. I am doing my Bachelor Thesis on this ...
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3.3v to 5v logic? [closed]

I have been looking over various data sheets for hours and still am not sure how to select an apporiate device. I am looking to send 5V 10mA pulses at 100-300kHz (to be determined) to a motor driver ...
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2answers
337 views

Beaglebone Black LCD/TFT/display and I2C2

I am considering buying a 4D Systems I2C LCD for the BBB, e.g. a 7" touchscreen, which uses the I2C2 bus. The question is, will I be able to use other peripherals on I2C2, on a home made cape, ...
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Connecting the Beaglebone Black to the KK Mini flight controller

The flight controller needs to be sent 4 PWM signals at greater than or equal to 5 volts. Since the Beaglebone Black(BBB) GPIOs can supply only 3.3V I needed to change the signal from a 3.3 volt one ...
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229 views

Beaglebone Black — Reading multiple HX711 / Load sensors

I have a BBB (Beaglebone black) connected to a few capes. I need to interface with 4 HX711 boards with loads sensors, I've yet to find anyone who has used any weight sensors with the BB; I've seen ...
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Accessing I2C address of ADT7516 ( Temp sensor )

I have a BeagleBone Green and an EVAL board of ADT7516. I connected them by SDA and SCL pins and as they are to be connected with the PC by the usb port, they will have a common ground. After this ...
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Yet Another question on using GPIO to short a remote push button

OK, I bought this little remote-controlled Ac outlet thing for $1. It controls 3 outlets via RF. I didn't realize it was RF at first, but I currently have my BeagleBone Black doing a bunch of home ...
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Method for Sending Multiple (16) Channels of Duty Cycle Modulated Signal over Medium-Long Distance

Problem What is the best method or industry standard solution for transmitting multiple channels (13 signal, 3 ground) of duty cycled modulated signals up to 25 feet. The data will be transmitted by ...
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1answer
86 views

Connecting Temperature sensor EVAL board (ADT7516) to the BeagleBone Green [closed]

I have a BeagleBone Green and an evaluation board of the temp sensor (ADT7516). I also have a 4-pin female jumper to grove 4 pin conversion cable. I am not an electronics student and have no idea ...
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67 views

Thermostats outputs to GPIO then to Furnace

I have a question on how to safely connect and detect Thermostats outputs to Controller's GPIO inputs (RasPi and BeagleBone). I've been looking up a lot and most of the cases it is showing me how to ...
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325 views

Beaglebone: Unable to boot with custom cape

I made a custom cape (attached) for my beaglebone black and when I connect it, the beaglebone doesn't boot, only the power led turns on. I'm booting from an SD card and I have disabled the HDMI and ...
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78 views

Is there another way to interface with BeagleBone Black hardware

As an example, to turn on one of the on-board LED's you need to update the text file "/sys/class/leds/beaglebone:green:usr0" In writing some tests just turning on ...
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Beaglebone GPU usage

The beaglebone uses TI AM335X SOC which has a SGX530 3D Graphics Engine. I wish to know if there is a single open source operating system available in the world wide web capable of using the ...
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How do you do a software reset of the am355x (like on the BeagleBone Black)?

Is there an easier way to do this than setting up a watchdog and waiting? Using only software (no tying a GPIO to the reset pin)?
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415 views

Beaglebone Black - DC Motor causes ADC to hang?

I'm working on a regenerative-braking project with a DC motor. My Beaglebone Black drives a small DC Motor using a TB6612FNG motor driver from Sparkfun (datasheet): Everything runs fine except that ...
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Digital Potentiometer Not Working

I am trying to control an AD5206 digital potentiometer on a PocketBeagle (smaller Beaglebone Black essentially). I have an entry in my device tree for spidev, and I ...
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79 views

DCF77 - No Signal detected

I'm using a Conrad DCF77 to get RTC on Beaglebone Black and wiring it so: 1--> GND | 2--> VCC 3,3 V | 3--> One of the gpios (P8_11) To read the Signal of the DCF Antenn I wrote the code: ...
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Stepper Motor Calculations

I am currently struggling to determine some parameters of a stepper motor I am using. I am trying to calculate the number of pulses per second I can deliver to the motor reliably. This is relatively ...
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2answers
5k views

Increase SPI transaction speed?

I am using SPI to write and read the data from slave board. I have two questions regarding this process: Question 1. Why when I am trying to read 1.000.000 bytes through SPI using 1 message, it works ...
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Protection of BeagleBone Black from eMMC corruption on power loss

I'm considering an application where a BeagleBone Black, preferably running one of the recommended Debian images loaded in eMMC, is powered by a 5V source that can be removed at any moment. I want to ...
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360 views

Using Beaglebone Black to prototype commercial product

I am designing a system and it's safe to say I am a little out of my depth. The requirements of the project are as follows; drive 7" WVGA touch screen and generate graphics 4-20mA input 3 x 4-20mA ...
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460 views

Beaglebone Black Power Switch Detection

I've looked around and found a bit of information regarding attaching a 3.7V lithium battery to the BBB (Beaglebone Black) but I haven't found an exact answer to what I am looking for. I understand ...
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437 views

How to interface matrix LED with beaglebone black

I'm a newbie to electronics and for my project I need to control a matrix LED with beaglebone black. I bought a LED click board (https://download.mikroe.com/documents/add-on-boards/click/4x4-rgb/4x4-...
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437 views

Beaglebone black usb host current

I'm using a Beaglebone black + BBVIEW 4.3 LCD Display + Datalogic Magellan 110i usb scanner. The scanner is connected to the usb host port but when I read a bar code the scanner goes down and then up ...
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how to calibrate ADXL345 accelerometer?

I have ADXL345 digital accelerometer by Analog Devices. I use Beaglebone ADXL345 library that exist here: http://inspire.logicsupply.com/2014/08/beaglebone-3-axis-accelerometer.html So I can read the ...
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BeagleBone Black CAN bus setup

I am trying to connect to a CAN bus network with my BeagleBone Black and SN65HVD230. I've connected it like in the picture. I am running: ...
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196 views

Connecting 5V Joystick to Beagle Bone Black [closed]

I was recently trying to connect an simple analog joystick to test the ADC values being read by my Beagle Bone Black. Since range of analog input for BBB is 0 to 1.8 V I supplied 1.8 V to the 5 V ...
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319 views

Powermanagement of a minicomputer in an automotive vehicle by engine start/stop and voltage threshold detection

Revison 1.3 (New circuit, more background information added, PCB made and tested, it WORKS) Background: I would like to use a BeagleBone Black (=Minicomputer) for data acquisition in an automotive ...
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2k views

Use BBB analog inputs with 0..5V or 0..10V

I plan to use the BeagleBone Black analog inputs for sampling of analog data. But there are some major problems for this: BBB allows a maximum of 1.8 V analog input voltage while I have 5 V or 10 V ...
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Can a 485 network work if the DE (driver enable) pin of the transceiver is always on?

We are using a Beaglebone Black with the Osso Cape (https://github.com/nexlab/Osso) for comunicating with other equipment using a 485 connection and Modbus RTU. The driver enable (DE) pin of the cape'...
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1k views

Connecting USB-powered Beaglebone to car's CAN bus through OBD connector using common signal ground

I want to connect my Beaglebone Black, powered from USB port on my laptop, to OBD connector present in my Ford in order to see CAN traffic with can-utils. ...
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872 views

Flash/obtain ROM code for Sitara on BeagleBone Black

How is the ROM code loaded/provided on the BeagleBone Black? I see a few possibilities: It is loaded on in TI's factory and is immutable [unlikely] It is flashed on during manufacture of BeagleBone [...
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1answer
47 views

Buying Low Volume Populated PCBs and Handling Passive PNs

New to Eagle PCB design. I plan on making a custom Beaglebone Black Wireless PCB, and so have pulled down the Eagle files. I'm a student and have a student license. This project will be too difficult ...
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658 views

How can I connect BeagleBone to 2 slaves with 1 “Chip Select” pin?

I have a BeagleBone white and I want to use it as a master which is connected to 2 slaves via an SPI connection, besides SCLK, DIN, and DOUT there is one pin of chip select "CS" "just one" and I need ...
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650 views

Assembly language: Ampersand before a register

I'm trying to program the Programmable Realtime Units (PRU) on my Beaglebone Black in assembly language. Here is the instruction set, which comes in two flavors: ...
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210 views

Can I provided 3.3V regulated directly to the BBB

I have a project where I need to be mobile and I draw a lot of power (4 BBB, 5 Port switch, 26 cameras). All of the cameras and the control circuits run at 3.3V - I'd love it if I could just deliver 3....
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312 views

Possible to use both CS1 and CS2 for SPI1 on Beaglebone?

I need to connect two SPI devices to Beaglebone. According to the documentation both SPI1_CS0 and SPI1_CS1 are available on the extension header: SPI1_D0, SPI1_D1 and SPI1_SCLK are available on P9[29]...
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No output for C++ GPIO code for beaglebone black

could anyone tell what could possibly be wrong in the following C++ code for enabling and setting pin no 49 (p9_23). I am directly checking the output on multimeter. ...
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455 views

Beaglebone Black - Maximum current supplied by 1.8V analog rail (Pin P9_32)?

On the Beaglebone Black, what is the most current that the 1.8V analog rail (pin 32 on header P9) can supply? I can't find it in the System Reference Manual. I would've expected to find it in ...