usb io

  
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This project is a 12-bit digital I/O extender using the Microchip PIC18f14k50 microcontroller which connects to an USB host port. The microcontroller is available in through-hole DIP20 and SMD packages, too. NOTE for beginners: PIC18F14k50 is a general purpose microcontrollerwhich has to be programmed before you can use it in the actual circuit.
usb io - schematic

Please check out this link to learn more. The device is powered by the USB bus. The ports RB4-7, RC0-7 can be set on a bit-by-bit basis to input or output direction. All LEDs on the schematic are optional, and are only shown for testing the device. You can find the USB connector pinouts at A computer or an embedded RISC board with an USB host port can be used to control the I/O extender. The controlio example code uses libusb. This means that you don`t need a kernel driver to interface with it. The circuit is a full speed (12Mbit) vendor-specific USB device. It uses only the control endpoint 0, and is controlled by vendor-specific control requests. If you want to make your own host interface, the implemented control requests are: - a package/usbio/Makefile is being made (not yet ready, please ask for it if you need). Copy files from usbio. zip c/ directory to the SDK package/usbio/src/



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