##Hardware USART library for AVR 8bit MCU's

###Copyright

Piotr Rudzki (c)2015

###License

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

For full license see http://www.gnu.org/licenses/gpl-3.0.en.html

###Introduction

This library provides two modes of operation for up to four USART's.

• Interrupt based mode with separate circular transmitting and receiving buffers for each enabled USART.
• Normal mode without additional buffers.

Mixing modes of operation is supported, e.g. USART0 in interrupt based mode, and USART1 in normal mode. For now only supported data format is 8N1.

For detailed usage see refman.pdf in doc directory, and attached interrupt_mode.c example.

###Changelog:

Version 2.0 - 11.03.2016

• removed bug in ATmega161
• small changes in hardware definitions

2.0 - 10.03.2016

• removed bug in usart_lib.c - wrong conditional compilation

2.0 - 08.03.2016

• full library rewrite, whole usage change
• added doxygen generated documentation
• supported MCU: ATmega162, ATmega48, ATmega88, ATmega168, ATmega328, ATmega640, ATmega1280, ATmega1281, ATmega2560, ATmega2561, Atmega16, ATmega32, ATmega323, ATmega8

###Todo:

• add support for more AVR MCU's
• add support for more frame formats
• add support for MPCM