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AVR_ATMEGA_USART

Description:

This is a asynchronous serial program for the ATMEGA seiries of mcu. The sotfware is tested and working.

Over time, I'm planning to add support for multiple AVR MCUs, however that may end up requiring more memory, so extensive of use of define macros will likely end up being the end result.

Features:

Multiple Baud Rates: 300, 600, 1200, 2400, 9600 ...
Asynchronous Receive and Transmit.
Optional Parity checking.
7-8 data bits.
Hardware abstraction API
No Interrupt service routines required.
BSD-3 Licensing, aka you can use this for whatevery you want pretty much.

Instructions

Example 1

#include "avr_usart.h"

void send_bt_cmd(char* cmd) {
    init_usart();
    unsigned char data[] = "AT+WAKE\0";
    uint8_t result = usart_send_str(data);
    
    if(result) {
        raise_error();
    }
}

ISSUES:

It's required to set the fuses in the chip for 8Mhz, otherwise a baud rate of 9600 will result in errors at a 7% rate.

Another is that I need to design a standard naming scheme.

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