1.3 KiB
1.3 KiB
Things to do and random ideas
Hardware Change Ideas
- Connectors for I2C,SPI,neopixel ...
- Could double as a connector for a small daughterboard
- Fine pitch connector for the debug connector
- Tiny buttons for rst/boot1 ...
- On board g-force/gyro chip, or as a small daughterboard
- Change to a 5V DCDC and a linear 3.3V? To provice 5V for things like LEDs and servos.
Software
- Develop a CAN bus capable bootloader for flashing over CAN. Probably needs incompatible changes to the CAN protocol
- Improve the CAN bus protocol to be more bandwidth efficient. Such as rely on CAN CRC and remove klipper CRC
- Modify klipper firmware to keep USB usable when using CAN bus
- At least allow USB to detect boot loader trying to flash
- Automatic switching to/from USB when connected
Bugs/flaws
- It's not possible to enter DFU bootloader when in klipper firmware automatically. The SWD pins might be in the wrong state.
- The CanSerial utility/Linux CAN bus interface is not as stable as you might wish
Hardware issues
- The TPS54308 DCDC converter generates a lot of heat at idle. Is there a better way to get 3.3V with low ripple?
Hardware Cost Cutting
- Use an STM32F0
- no crystal needed? Even for CAN?
- Change to some cheap generic DCDC controller.