Rachel Livestreams

2021-07-10: SPIFlashProgrammer/dragonBoot - USB DFU bootloader: Episode 18

Rachel Livestreams — Mon, 27 Sep 2021 00:00:00 GMT

The eighteenth part in a multi-part series.

Join me as I take my existing kit-bashed prototype of SPIFlashProgrammer from dev board to dedicated board and learn KiCAD along the way

This stream focuses on continuing building and implementing a DFU bootloader for the device, pulling it out into its own project named dragonBoot

Livestream 2021-07-03: SPIFlashProgrammer/dragonBoot: USB DFU bootloader - Episode 17

Rachel Livestreams — Sun, 26 Sep 2021 00:00:00 GMT

The seventeenth part in a multi-part series.

Join me as I take my existing kit-bashed prototype of SPIFlashProgrammer from dev board to dedicated board and learn KiCAD along the way

This stream focuses on continuing building and implementing a DFU bootloader for the device, pulling it out into its own project named dragonBoot

Livestream 2021-07-01: MXKeyboard to dragonUSB and class-specific interface requests - Episode 29

Rachel Livestreams — Tue, 21 Sep 2021 00:00:00 GMT

The twenty-nineth part in a multi-part series.

Having designed a keyboard and had the board fabricated, this series follows my process of taking it from a completely bare board to a hardware-functional product ready for its case, firmware and PC software

This stream follows me porting the MXKeyboard USB stack to dragonUSB so the project uses a unified stack with a bootloader to address an issue from the previous stream as found on the first rev 2 board as designed in parts 9-13 + 15(.1) of my MXKeyboard - a Cherry MX key based, RGB backlit, 6-layer keyboard

Livestream 2021-06-26: SPIFlashProgrammer rev 2 - USB DFU bootloader - Episode 16

Rachel Livestreams — Mon, 20 Sep 2021 00:00:00 GMT

The sixteenth part in a multi-part series.

Join me as I take my existing kit-bashed prototype of SPIFlashProgrammer from dev board to dedicated board and learn KiCAD along the way

This stream focuses on building and implementing a DFU bootloader for the device, pulling it out into its own project named dragonBoot

Livestream 2021-06-11: Blackmagic Probe firmware work - Episode 1

Rachel Livestreams — Sun, 19 Sep 2021 00:00:00 GMT

In this stream we write a new targets and figure out how to arrange code and data from an ELF in a format efficient for storage in SPI Flash on-board

Livestream 2021-06-12: MXKeyboard rev 2 profiles and callbacks - Episode 28

Rachel Livestreams — Sun, 19 Sep 2021 00:00:00 GMT

The twenty-eight part in a multi-part series.

This stream follows me figuring out how to represent keyboard profiles and store them, then finding out that we need a bootloader to provide Flash rewrite support for the first rev 2 board as designed in parts 9-13 + 15(.1) of my MXKeyboard - a Cherry MX key based, RGB backlit, 6-layer keyboard

Livestream 2021-06-19 - SPIFlashProgrammer indeterminate-duration progress bars and DFU - Episode 15

Rachel Livestreams — Sun, 19 Sep 2021 00:00:00 GMT

The fifteenth part in a multi-part series.

Join me as I take my existing kit-bashed prototype of SPIFlashProgrammer from dev board to dedicated board and learn KiCAD along the way

This stream focuses on implementing indeterminate-length CLI progress bars, and building a DFU bootloader for the device

Livestream 2021-06-05: SPIFP rev 2, debugging Flash reads and introducing writes - Episode 14

Rachel Livestreams — Sat, 18 Sep 2021 00:00:00 GMT

The fourteenth part in a multi-part series.

Join me as I take my existing kit-bashed prototype of SPIFlashProgrammer from dev board to dedicated board and learn KiCAD along the way

This stream focuses on fixing the read component of the protocols for the device, getting writes to the Flash chips working as a result, then demoing a complete flow all the way back to the desktop software and into a file.

Livestream 2021-05-29: MXKeyboard rev 2 USB HID a continuation - Episode 27

Rachel Livestreams — Sun, 08 Aug 2021 00:00:00 GMT

The twenty-seventh part in a multi-part series.

This stream follows me figuring out the HID reporting logic and getting the translated scancodes back to the host on first rev 2 board as designed in parts 9-13 + 15(.1) of my MXKeyboard - a Cherry MX key based, RGB backlit, 6-layer keyboard

Livestream 2021-05-08: ViewSB fixes and setup packet decoding

Rachel Livestreams — Sun, 08 Aug 2021 00:00:00 GMT

In this stream we fix some issues with ViewSB and do a first pass at implementing setup packet decoding to make the data more pleasant to work with

Livestream 2021-05-01: SPIFlashProgrammer rev 2 - Flash reads and progress bars: Episode 13

Rachel Livestreams — Thu, 01 Jul 2021 00:00:00 GMT

The thirteenth part in a multi-part series.

Join me as I take my existing kit-bashed prototype of SPIFlashProgrammer from dev board to dedicated board and learn KiCAD along the way

This stream focuses debugging the read component of the protocols for the device, and attempting to get data out from our first Flash chip all the way back to the desktop software and into a file. During this stream, we fix the issues that had the process stalled, and implement proper TUI progress bars in the PC software so the process is ergonomic to use

Livestream 2021-05-22: MXKeyboard rev 2 USB HID: Episode 26

Rachel Livestreams — Thu, 01 Jul 2021 00:00:00 GMT

The twenty-sixth part in a multi-part series.

This stream follows me figuring out the HID report descriptor and how to translate and represent USB HID scan codes, proving the concept for the default key map and translation mechanism using the debug UART on first rev 2 board as designed in parts 9-13 + 15(.1) of my MXKeyboard - a Cherry MX key based, RGB backlit, 6-layer keyboard

Livestream 2021-04-10: SPIFlashProgrammer rev 2 - Implementing the USB to Flash protocol: Episode 12

Rachel Livestreams — Tue, 04 May 2021 07:00:00 GMT

The twelth part in a multi-part series.

Join me as I take my existing kit-bashed prototype of SPIFlashProgrammer from dev board to dedicated board and learn KiCAD along the way

This stream focuses the read component of the protocols for the device, and attempting to get data out from our first Flash chip all the way back to the desktop software and into a file. During this stream, we fix bugs and improve robustness of the PC software and firmware alike, and get to spend some time debugging the read logic

Livestream 2021-03-17: MXKeyboard rev 2 key scanning and DMA: Episode 24

Rachel Livestreams — Tue, 04 May 2021 07:00:00 GMT

The twenty-fourth part in a multi-part series.

This stream follows me improving backlighting DMA and working on implementing the first major step of key scanning on the first rev 2 board as designed in parts 9-13 + 15(.1) of my MXKeyboard - a Cherry MX key based, RGB backlit, 6-layer keyboard

2021-04-24: MXKeyboard rev 2 key scanning and JTAG-PDI protocol RE'ing: Episode 25.1

Rachel Livestreams — Tue, 04 May 2021 07:00:00 GMT

The twenty-fifth part in a multi-part series. This stream is broken into 2 parts due to technical difficulties. This is part 1

This stream follows me testing a hypothesis for improving key scanning speed and starting to black-box reverse engineer the JTAG-PDI protocol used to communicate with the processor on the first rev 2 board as designed in parts 9-13 + 15(.1) of my MXKeyboard - a Cherry MX key based, RGB backlit, 6-layer keyboard

2021-04-24: MXKeyboard rev 2 key scanning and JTAG-PDI protocol RE'ing: Episode 25.2

Rachel Livestreams — Tue, 04 May 2021 07:00:00 GMT

The twenty-fifth part in a multi-part series. This stream is broken into 2 parts due to technical difficulties. This is part 2

Livestream 2021-03-07: Yumekui power supply design stream

Rachel Livestreams — Mon, 19 Apr 2021 07:00:00 GMT

Yumekui (「夢喰い」 which translates to "Dream Eater") is a project which is the brain child of my other half lethalbit (Aki).

The project at a top-level is reasonably simple: Yumekui is an open-source hardware + software PCIe Gen 3 analyser.

Join us in this stream as Aki designs symbols and footprints and puts together part of the architecture for this, while I design the first power supplies for the FPGAs that power the analyser.

Livestream 2021-03-13: The USB to SPI Flash protocol for SPIFlashProgrammer rev 2 - Episode 11

Rachel Livestreams — Mon, 19 Apr 2021 07:00:00 GMT

The eleventh part in a multi-part series.

Join me as I take my existing kit-bashed prototype of SPIFlashProgrammer from dev board to dedicated board and learn KiCAD along the way

This stream focuses on the USB aspect of the device, and writing the USB to Flash communications protocol, along with the desktop utility for talking with the board. During this stream, we get device listings working along with our first Flash chip erasure

Livestream 2021-03-27: PS/2 driver and key scanning for MXKeyboard rev 2 - Episode 22

Rachel Livestreams — Mon, 19 Apr 2021 07:00:00 GMT

The twenty-second part in a multi-part series.

This stream follows me attempting PS/2, and after that fails, poking at key scanning and figuring out that the column drive system is broken and then coming up with next steps on fixing it on the first rev 2 board as designed in parts 9-13 + 15(.1) of my MXKeyboard - a Cherry MX key based, RGB backlit, 6-layer keyboard

Livestream 2021-04-03: Fixing MXKeyboard rev 2 column scanning: Episode 23.1

Rachel Livestreams — Mon, 19 Apr 2021 07:00:00 GMT

The twenty-third part in a multi-part series. This stream is broken into 3 parts due to technical difficulties. This is part 1

This stream follows me working on the hardware to fix the column scanning which is broken due to a missed power supply pin (AVCC of the processor) on the first rev 2 board as designed in parts 9-13 + 15(.1) of my MXKeyboard - a Cherry MX key based, RGB backlit, 6-layer keyboard