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diff --git a/docs/flashing.md b/docs/flashing.md index 3b4582f005..833b9dd629 100644 --- a/docs/flashing.md +++ b/docs/flashing.md @@ -119,6 +119,31 @@ Flashing sequence: 3. Flash a .hex file 4. Reset the device into application mode (may be done automatically) +## USBasploader + +USBasploader is a bootloader developed by matrixstorm. It is used in some non-USB AVR chips such as the ATmega328P, which run V-USB. + +To ensure compatibility with the USBasploader bootloader, make sure this block is present in your `rules.mk`: + + # Bootloader + # This definition is optional, and if your keyboard supports multiple bootloaders of + # different sizes, comment this out, and the correct address will be loaded + # automatically (+60). See bootloader.mk for all options. + BOOTLOADER = USBasp + +Compatible flashers: + +* [QMK Toolbox](https://github.com/qmk/qmk_toolbox/releases) (recommended GUI) +* [avrdude](http://www.nongnu.org/avrdude/) with the `usbasp` programmer +* [AVRDUDESS](https://github.com/zkemble/AVRDUDESS) + +Flashing sequence: + +1. Press the `RESET` keycode, or keep the boot pin shorted to GND while quickly shorting RST to GND +2. Wait for the OS to detect the device +3. Flash a .hex file +4. Reset the device into application mode (may be done automatically) + ## STM32 All STM32 chips come preloaded with a factory bootloader that cannot be modified nor deleted. Some STM32 chips have bootloaders that do not come with USB programming (e.g. STM32F103) but the process is still the same. |