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SLDongle (SLD) provides an inexpensive entry into the world of microcontroller development. http://schoar.de/tinkering/sld Control LEDs from host: 1. Plug SLD into USB port 2. Pipe 13 bytes to /src/usbhost/sldtool Compile own application: - MCU = atmega88p - F_CPU = 12000000 - Max size = 8192 bytes (flash) - 2048 bytes (bootloader) = 6144 bytes Flash own application: 1. Hold button 2. Plug SLD into USB port 3. Wait until host has enumarated the emulated USBasp 4. Release button 5. Flash your hex file (avrdude -p atmega88p -c usbasp -U flash:w:my.hex) Directory structure: /pcb Schematic and board as Eagle CAD files /pcb/img Schematic and board as PNG files /pcb/gerber Board as Gerber files /src/bootloader Bootloader running on the device /src/contrib Third party contributions /src/firmware Main app running on the device /src/helper Helper scripts for mass flashing /src/simple A simple example app /src/usbhost Host tool to control LEDs