![]() ![]() But, if it does not, you need to verify you are on version 0.0.21. Open your firmware file you want in your Pro Micro.Make sure you are using QMK Toolbox version 0.0.21 or higher.This will give you another yellow line.įlashing the Pro Micro (Caterina Bootloader) .After flashing, your PCB will disconnect and it will exit bootloader.Now that your keymap file is loaded and your PCB is connected, click Flash.You should see a line in yellow that tells you it is connected.With your keyboard connected to the computer hold the reset button for a second and then let go.For most Keebio items, the MCU field will be pre-filled with ATmega32u4.If you're on Windows or Mac, you can follow the procedure below. If you are having issues with driver installation, see Driver Installation with Zadig. The ATmega32u4 DFU Bootloader driver along with other bootloader drivers will be installed. To install the DFU Bootloader driver, right-click anywhere in the top part of the QMK Toolbox window as shown below and click on Install Drivers. If you open up QMK Toolbox, press the reset button on your ATmega32u4-based board, and see (NO DRIVER) on the line for Atmel DFU device connected, then you'll need to install the bootloader driver on Windows. This section only applies to Windows, skip this if you are on a Mac, as there are no drivers needed for Mac. Flashing ATmega32u4 (DFU Bootloader) One-time Setup (Windows only) Setting up the QMK build environment is beyond the scope of this guide, so if you need assistance with that, consult the QMK Introductory Tutorial and/or join the QMK Discord Server. Here's a couple of links on how to do that from the QMK documentation: One way to flash is using the command-line via a QMK environment setup. For this guide, make sure you have Version 0.0.21 or higher installed, as the most recent versions have better device detection methods for more reliable flashing. Make sure you download the latest release here. QMK Toolbox contains various flashing tools into one app, and has been designed to make the flashing process easier. If both halves have been flashed recently, and you're only updating a keymap and not adding features, then you will only need to flash the half that will have the USB cable from the computer plugged into it. Due to occaisional protocol changes in QMK of how both halves communicate with each other, if it's been a while (2 or more months) since you flashed your keyboard, go ahead and flash both halves individually with the same firmware file. This depends on the difference of how old the firmware is on each half of the board. Do I need to flash both halves of a split keyboard? ![]() Each half needs to be plugged in individually one at a time to the USB port to be flashed. Having it plugged in will not flash both halves at the same time.įlashing does not does not send any signals over the interconnect cable, so it does not matter if the interconnect cable is plugged in or not while flashing. Having the interconnect cable plugged in between the halves while flashing has zero effect on flashing. Split Keyboards Do I need to have the TRRS cable (or USB-C to USB-C cable) plugged in while trying to flash both halves? ![]() Currently, RP2040 is used on the following Keebio PCBs:.Found on RP2040-based keyboards/controllers, such as the Elite-Pi and Sinc Rev.Found on Arduino Pro Micro controllers, so if you've built a board with a Pro Micro, you have the Caterina Bootloader.Currently, STM32 is used on the following Keebio PCBs:.This bootloader is on STM32-based keyboards.This bootloader is the one present on most Keebio PCBs that already have a microcontroller pre-soldered onto it.ATmega32u4 DFU Bootloader (most common).Here's the different possible bootloaders in use for Keebio boards: It's important to know what bootloader is present on your board, as the flashing procedure varies based on what you have. A bootloader is a program on the microcontroller that allows firmware to be uploaded to the microcontroller via USB. Determining Bootloader īefore flashing, you'll need to know what bootloader is present on the microcontroller that's on your PCB. While there are multiple methods of flashing, this guide with only address the usage of QMK Toolbox to perform flashing. ![]() This might be a good practice to be sure you're starting out with gear that will perform as desired. You can flash the microcontrollers (ATmega32u4, Pro Micro, Elite-C, etc) in your kit prior to building your keyboard to ensure that they are undamaged and functioning normally. ![]()
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