When building circuits, many peripherals accept data via a serial, RS232-style connection. Cheap micro controllers(e.g. PIC16F84A) don’t have an internal UART though…”bit banging” a port is due.

Dallas Maxim has published an application note on how to implement a software UART on one of its MAX controllers; but the information is also useful for most other controller types.

I needed sth like this a few weeks ago…enjoy:
http://www.maxim-ic.com/appnotes.cfm/appnote_number/4041

Related posts:

  1. Accessing SD cards with a microcontroller
  2. Boosting linear regulator output current
  3. Emulating Li-Ion batteries with a NiMH cell
  4. USB for your own hardware-with the MAX3420E
  5. Accessing an SD card via SPI

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