/* Copyright (C) 2016 - IIT Bombay - FOSSEE This file must be used under the terms of the CeCILL. This source file is licensed as described in the file COPYING, which you should have received as part of this distribution. The terms are also available at http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt Author: Ashish Kamble Organization: FOSSEE, IIT Bombay Email: toolbox@scilab.in */ //Function to Setup Serial communication for ATmega16. #include "AVRPeripheralUART.h" uint8 u8AVRUARTSetups(uint8 mode, uint32 baudrate, uint8 stopbits, uint8 parity) { //Enable UART and USART UCSRC |= (1<<URSEL); UCSRB |= (1<<TXEN)|(1<<RXEN); switch (mode) //According to mode set bits UMSEL and U2X { case 0: //Normal mode UCSRC &= ~(1<<UMSEL); //Clear bit 6 UMSEL and U2X=0 UCSRA &= ~(1<<U2X); UCSRC &= ~(1<<UCPOL); // Clock polarity bit break; case 1: //Double speed mode UCSRC &= ~(1<<UMSEL); //Clear bit 6 UMSEL and U2X=1 UCSRA |= (1<<U2X); UCSRC &= ~(1<<UCPOL); //Clock polarity bit break; case 2: //Synchronous mode UCSRC |= (1<<UMSEL); //Set bit 6 UMSEL and set clock polarity UCSRC |= (1<<UCPOL); break; } //Set stop bits if(stopbits == 0) { UCSRC &= ~(1<<USBS); // 1 stopbit } else UCSRC |= (1<<USBS); //2 stopbits //Set parity bit settings switch(parity) { case 0: // Parity disabled UCSRC &= ~(1<<UPM1); //UPM1:0=0 UCSRC &= ~(1<<UPM0); break; case 1: // Even parity UCSRC |= (1<<UPM1); //UPM1:0 = 2 UCSRC &= ~(1<<UPM0); break; case 2: // Odd parity UCSRC |= (1<<UPM1); //UPM1:1 = 3 UCSRC |= (1<<UPM0); break; } //Set baudrate UCSRC &= ~(1<<URSEL); switch(baudrate) { case 2400: UBRRL = 0xA0; UBRRH = 0x01; break; case 4800: UBRRL = 0xCF; UBRRH = 0x00; break; case 9600: UBRRL = 0x67; UBRRH = 0x00; break; case 14400: UBRRL = 0x44; UBRRH = 0x00; break; case 19200: UBRRL = 0x33; UBRRH = 0x00; break; case 28800: UBRRL = 0x22; UBRRH = 0x00; break; case 38400: UBRRL = 0x19; UBRRH = 0x00; break; case 57600: UBRRL = 0x10; UBRRH = 0x00; break; case 768000: UBRRL = 0x0C; UBRRH = 0x00; break; case 115200: UBRRL = 0x08; UBRRH = 0x00; break; case 230400: UBRRL = 0x03; UBRRH = 0x00; break; case 250000: UBRRL = 0x03; UBRRH = 0x00; break; case 1000000: UBRRL = 0x00; UBRRH = 0x00; break; } //Set data format UCSRC|= (1<<URSEL)|(1<<UCSZ0)|(1<<UCSZ1); return 0; }