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diff --git a/keyboards/kprepublic/cstc40/readme.md b/keyboards/kprepublic/cstc40/readme.md index 211c078cc2..e6493b28a0 100644 --- a/keyboards/kprepublic/cstc40/readme.md +++ b/keyboards/kprepublic/cstc40/readme.md @@ -1,26 +1,25 @@ -# cstc40 +# CSTC40 -A 40% hotswap ortholinear RGB keyboard from KP Republic. +## This keyboard has 3 known hardware revisions, please be sure to flash the correct firmware for your PCB -* Keyboard Maintainer: [Var](https://github.com/itsvar8) -* Hardware Supported: CSTC40 -* Hardware Availability: kprepublic.com +A 40% hotswap ortholinear RGB keyboard from KP Republic -The differences between the two versions are just the rows and columns pins and the additional small pcb for the daughterboard version. +### Revision 1: "daughterboard" -Make example for this keyboard (after setting up your build environment): +* STM32F402RCT6 MCU with IS31FL3733 LED driver, using `stm32-dfu` bootloader. Uses a separate daughterboard for USB connection. - for daughterboard version: make kprepublic/cstc40/daughterboard:default - for single pcb version: make kprepublic/cstc40/single_pcb:default +* Upon entering bootloader mode QMK Toolbox will display this message: +`STM32 DFU device connected (WinUSB): STMicroelectronics STM32 BOOTLOADER (0483:DF11:2200)` -See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs). +### Revision 2: "single pcb" -## Bootloader +* STM32F402RCT6 MCU with IS31FL3733 LED driver, using `stm32-dfu` bootloader. Integrated USB connection. -Enter the bootloader in 3 ways: +* Upon entering bootloader mode QMK Toolbox will display this message: +`STM32 DFU device connected (WinUSB): STMicroelectronics STM32 BOOTLOADER (0483:DF11:2200)` -* **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard -* **Physical reset button**: Briefly press the button on the back of the PCB - some may have pads you must short instead -* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available +### Revision 3: "FXTwink single pcb" -The single_pcb uses pin A10, which apparently is a design flaw that prevent the bootloader to start every time - https://docs.qmk.fm/#/platformdev_blackpill_f4x1?id=pins-to-be-avoided. There is a simple workaround that works most of the time - press the pin key (generally the letter R) during the boot. +* STM32F402RCT6 MCU without separate LED driver, using `tinyuf2` bootloader. Integrated USB connection. + +* Upon entering bootloader mode the board will appear in your computer's file system as a new USB mass storage device. |