#2899 new project

Improve the Raspberry Pi BSP

Reported by: Tanu Hari Dixit Owned by:
Priority: normal Milestone: Indefinite
Component: bsps Version:
Severity: normal Keywords: SoC, BSP
Cc: Alan Cudmore Blocked By:

Description (last modified by Gedare)

Improve the Raspberry Pi BSP

Students: Past, Present, and Potential Students

Status: Some work: GSoC2013.

Introduction: More peripherals and other improvements for Raspberry Pi. Peripherals we need to support (in order of increasing difficulty):

  1. Secure Digital card read and write support (some initial work using the BSD sdhci driver)
  2. Graphics / RTEMS Framebuffer Support
  3. USB Device support
  4. HDMI/Graphics console (Requires framebuffer support and USB or GPIO connected keyboard device)
  5. Ethernet network support (Requires USB support)

Another issue is to come up with a more efficient way to load and debug code on the Raspberry Pi. Options include using U-boot or connecting a JTAG debug device to load code.

RTEMS GSoC 2017 Raspberry Pi Ideas

Potential Raspberry Pi work this summer includes:

  • Convert the existing SPI support to the new Linux SPI API and test with SPI devices
  • Continue to work on the LibBSD support: See https://lists.rtems.org/pipermail/devel/2016-September/016092.html Since then, the libbsd version has been updated in RTEMS, so it may need some work to get it to compile again.
  • Support the Pi Zero W ( and potentially the Pi 3 ) by creating a new uart driver. The current UART is used by the bluetooth in the Pi 3 and Zero W.
  • Support Pi 3 SMP ( along with the UART )

Even more advanced work could include:

  • Support the Wifi and bluetooth in LibBSD for the Pi Zero W and/or Pi 3.

RTEMS GSOC 2015 Raspberry Pi Ideas

Due to the plethora of interested students this year, we have created a few groups of project ideas. Students should focus on one project group, and more than one student may propose a project in the same group. There are plenty of *extra* tasks that we can create unique projects for all the students.

Project Group 1 - Low Level Peripherals and SD Card

Status: GSoC 2015

  1. Complete SPI, GPIO, I2C integration (Done)
  2. Implement SD Card file system support (Started)
  3. Implement Model identification detection and reporting (To be done. Mailbox support was provided but not merged yet by another project)
    • This requires support for the mailbox interface used for graphics. Also the memory size can be dynamically determined this way. In addition to spots where this can make the BSP code more flexible, a method should be provided to the user to get the Pi version.
  4. Extra: Implement DMA support for I2C and SPI (To be done)
  5. Extra: Implement support for second SPI device on A+/B+/Pi 2 (To be done)
    • If the second SPI device is a second instance of the first device, then support for both should be done in step 1.

Project Group 2 - USB Support

Status: GSoC 2015

  1. Implement USB device support using libBSD
  2. Implement basic HID support ( keyboard/mouse )
  3. Implement USB Ethernet Device support
  4. Extra: Implement USB on multiple Pi models
  5. Extra: Implement USB storage device support

NOTE: A general issue with this task is the order in which to tackle the various USB device types. Removable USB storage works for at least some type(s) of media. This may make it appropriate to do earlier. This order and test procedures will need to be worked out with RTEMS developers on the mailing list. It should be assumed that the work plan for bringing up USB on a target board is the same for all boards and this information added to the BSP development manual.

Project Group 3 - Raspberry Pi 2 Support

Status: GSoC-2015

  1. Implement correct arm architecture support (v7)
  2. Implement correct cache configuration
  3. Enable and test SMP configuration
  4. Extra: Integrate/Test? Low Level Peripheral Code
  5. Extra: Integrate/Test? USB Code

Project Group 4 - Raspberry Pi Graphics support

Status: GSoC 2015

  1. Implement mailbox interface for graphics/framebuffer
    • Also used for board version identification
  2. Implement RTEMS framebuffer device support
  3. Implement RTEMS framebuffer/graphics based console (output)
  4. Integrate RTEMS graphics library with RTEMS Source Builder with RPi example
  5. Extra: Determine how to manage Kernel/GPU memory split options
  6. Extra: Coordinate with USB project group to integrate USB input with HDMI console/shell

Migrating the components of the RTEMS Graphics Toolkit to the RSB is desirable as part of this project.

Goal: Concise statement of the overall goal of the project. Refine this initial statement to include: project deliverables (code, docs, testing), required/suggested methodology, standards of quality, possible goal extensions beyond the main objective.

Requirements: List the requirements and level of expertise you estimate are required by the developer tackling this project will have to have: Required level of programming language(s), specific areas of RTEMS or tools, level of familiarity with RTEMS, cross-development, GNU/Linux, etx., development/documentation/testing tools, mathematical/algorithmic background, other desirable skills.

Resources: Current RTEMS developers, papers, etc that may help you in this project.


  • who helped and did work

Miscellaneous Sections

As the project progresses, you will need to add build instructions, etc and this page will evolve from a project description into a HOWTO.


  • TBD

Other sections: If you have more to say about the project that doesn't fit in the proposed sections of this template, feel free to add other sections at will.

Change History (5)

comment:1 Changed on Feb 6, 2017 at 4:02:32 AM by Chris Johns

Type: enhancementproject

comment:2 Changed on Mar 2, 2017 at 8:21:25 PM by Gedare

Keywords: BSP added

comment:3 Changed on Mar 6, 2017 at 12:45:57 PM by Gedare

Description: modified (diff)

comment:4 Changed on Mar 6, 2017 at 12:46:30 PM by Gedare

Description: modified (diff)

comment:5 Changed on Aug 14, 2017 at 12:16:33 AM by Chris Johns

Version: 4.11
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