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Using a 9bit software UART with Stellaris microcontrollers

Posted: 03 Sep 2010     Print Version  Bookmark and Share

Keywords:Stellaris microcontrollers  UART  9bit software 

Extend the functionality of the standard hardware UART available on Stellaris microcontrollers by using the 9bit UART add-on. This practical software solution provides a way to distinguish between an address or data character.

The UART is a widely used serial communications peripheral used in many applications for connection to legacy devices and is present on all Stellaris microcontrollers. Some systems require the additional functionality of a 9bit UART with automatic address detection. The 9bit software UART uses a ninth bit to differentiate between a data or address character. The auto address detection allows the user to program a specific address that is used to determine if the received data is supposed to be processed or discarded. The 9bit UART was written using the standard UART DriverLib API. The 9bit UART uses the same function structure as the standard UART, but adds the NB_ prefix specifically for 9bit UART calls. This application note describes the 9bit UART software add-on in detail.

View the PDF document for more information.

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