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This commit adds documentation for pico-serprog by stacksmashing: https://github.com/stacksmashing/pico-serprog and its fork by Riku_V: https://codeberg.org/Riku_V/pico-serprog to the serprog overview page. Change-Id: I457dfec52f89997f64b6c276c50b329359d61b77 Signed-off-by: Funkeleinhorn <git@funkeleinhorn.com> Reviewed-on: https://review.coreboot.org/c/flashrom/+/82229 Reviewed-by: Anastasia Klimchuk <aklm@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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==================
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Serprog (overview)
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==================
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This page collects information about the serprog protocol and the programmers implementing it.
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Protocol
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========
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See :doc:`/supported_hw/supported_prog/serprog/serprog-protocol`. It is designed to be compact and allow efficient storage in limited memory of programmer devices.
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AVR flasher by Urja Rannikko
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============================
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.. image:: 300px-Avr_rs232_programmer.jpg
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The Prototype RS232 AVR parallel flash programmer of Urja Rannikko was the first implementation of the serprog protocol.
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The source code can be found `here <https://github.com/urjaman/frser-atmega88>`_.
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InSystemFlasher by Juhana Helovuo
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=================================
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This was the first one that talks to SPI devices via serial over USB.
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Details can be found in the `coreboot wiki <https://www.coreboot.org/InSystemFlasher>`_ and in this
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`coreboot mailing list thread <https://mail.coreboot.org/pipermail/coreboot/2011-February/063349.html>`_.
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atmegaXXu2-flasher by Stefan Tauner
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===================================
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Like the InSystemFlasher this one uses LUFA on an AVR microcontroller to tunnel the serial data over USB.
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.. image:: 300px-AtmegaXXu2-flasher.jpg
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Various Arduino based flashers
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==============================
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Frser-duino
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-----------
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This project contains `source code <https://github.com/urjaman/frser-duino/>`_ to install on Arduino devices.
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This developer also have various ports on `github repo <https://github.com/urjaman?tab=repositories>`_ for several microcontroller boards, such as:
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* `frser-teensyflash <https://github.com/urjaman/frser-teensyflash>`_: A port for the teensy microcontroller board
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There also various other interesting projects such as:
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* `fast-usbserial <https://github.com/urjaman/fast-usbserial>`_: A software to make arduino with 8u2 or 16u2 flashing faster and more reliable]
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* :ref:`arduino shield`
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Using a 5v Arduino at 3.3V
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--------------------------
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Information on it can be found in this doc: :doc:`/supported_hw/supported_prog/serprog/arduino_flasher_3.3v`
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5V arduino with level shifter
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-----------------------------
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For detailed instructions on how to use different Arduino models to access SPI flash chips see :doc:`/supported_hw/supported_prog/serprog/arduino_flasher`
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.. image:: 300px-Serprog_0001.jpeg
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Teensy 3.1 SPI + LPC/FWH Flasher
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--------------------------------
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A Teensy 3.1 based small flasher by Urja Rannikko documented here: :doc:`/supported_hw/supported_prog/serprog/teensy_3_1`
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HydraBus multi-tool
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-------------------
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HydraBus (hardware) with HydraFW (firmware) is an open source multi-tool for learning, developing, debugging, hacking and penetration testing
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of embedded hardware. It is built upon an ARM Cortex-M4 (STM32F405). The source code for HydraFW is available
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`on GitHub <https://github.com/hydrabus/hydrafw>`_. Refer to `their GitHub Wiki <https://github.com/hydrabus/hydrafw/wiki/HydraFW-SPI-guide#flashrom-usage>`_
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for more details on how to use HydraBus with flashrom.
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.. image:: 300px-HydraFW_Default_PinAssignment.png
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stm32-vserprog by Chi Zhang
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-----------------------------
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A powerful option is `stm32-vserprog <https://github.com/dword1511/stm32-vserprog#stm32-vserprog>`_, a firmware for various STM32-based boards
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that turns them into serprog-based programmers with SPI clock speeds up to 36 MHz.
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pico-serprog
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------------
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`pico-serprog <https://github.com/stacksmashing/pico-serprog>`_ by stacksmashing is a firmware for
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`Raspberry Pi Picos <https://www.raspberrypi.com/documentation/microcontrollers/raspberry-pi-pico.html>`_ and other RP2040 based boards which turns them
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into a serprog programmer.
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Notable forks are:
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`Riku_V's fork <https://codeberg.org/Riku_V/pico-serprog>`_ which uses the hardware SPI implementation instead of SPI over PIO (programmable IO) which
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sacrifices arbitrary pinouts. The fork also implements custom USB descriptors which allow for custom udev-rules.
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