/Beaglebone-BidirectionBus

This repo contains device drivers and other firmware to implement a bidirectional Bus with a Beaglebone

Primary LanguageC

Beaglebone-BidirectionBus

Bidirectional communication allows the Beaglebone to take inputs and control multiple outputs from the PRU.

Details

GSoC 2020 project under BeagleBoard.org

Name: Deepankar Maithani
Wiki:  https://elinux.org/BeagleBoard/GSoC/Deepankar

Mentors: Abhishek Kumar,Jason kridner, Saketh, RMA, ds2
Organisation: BeagleBoard.org

Know More about me: My Website :

Requirements

  • pru-gcc : Required to compile the PRU firmware. Install using following commands

    sudo apt-get update sudo apt-get install gcc-pru

More info can be found here gnupru

  • libgpiod: Required to compile the userspace code. Current version used is 1.4.1-2rcnee3~buster+20190906

    sudo apt-get install -y libgpiod-dev

  • Linux version used for development is (not a strict requirement): Linux beaglebone 4.19.94-ti-r42 #1buster SMP PREEMPT Tue Mar 31 19:38:29 UTC 2020 armv7l GNU/Linux

  • Linux Headers: Required to build the kernel Module

    apt-cache search linux-headers-$(uname -r) sudo apt install linux-headers-$(uname -r)

Folder Description

  • unidirec_595 : It contains code to establish unidirectional communication between ARM and PRU

    • hardwaretest_595: It contains pru firmware that can be run to test if all the wirings are correctly made and IC is working fine
    • pru_pinconfig:It contains shell script and systemd service file to set modes on the enhanced PRU pins
    • rpmsg_595:Contains pru firmware to establish communication between ARM and PRU. The user can send data from userspace to the shift register outputs
    • ReadMe: Explains the usage of code in the folder

  • biidirec_299 : It contains code to establish Bidirectional communication between ARM and PRU

    • hardwaretest_299: It contains pru firmware that can be run to test if all the wirings are correctly made and IC is working fine
    • pru_pinconfig:It contains shell script and systemd service file to set modes on the enhanced PRU pins
    • rpmsg_299:Contains pru firmware to establish communication between ARM and PRU. The user can send data from userspace to the shift register outputs or can read the shiftregister pins as input
    • ReadMe: Explains the usage of code in the folder

  • driver :It contains the loadable kernel module and make file to build it.

    • ReadMe: Explains the usage of code in the folder

  • References : It contains documents like TRM, SRM and data sheets

  • uspace_examples : It contains codes that runs in the userspace to fetch or send data. It uses libgpiod.

Usage and other Details.

Refer to the Wiki and ReadMe files inside the folders

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