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/*
* CFile1.c
*
* Created: 4/3/2024 10:21:26 AM
* Author: bsw9xd
*/
#include "serial.h"
#define F_CPU 16000000UL
#define BAUD 9600 //standard minimum baud rate
void usart_init() {
volatile int ubrr = (F_CPU / (16UL * BAUD)) - 1;
UCSR1A = 0; //async normal communication
//enable transmission/reception
UCSR1B = (1 << TXEN) | (1 << RXEN);
//8 bits per packet, no parity, 1 stop bit
UCSR1C = (1 << UCSZ0) | (1 << UCSZ1);
//set baud rate
UBRR1H = (unsigned char)(ubrr << 8);
UBRR1L = (unsigned char)ubrr;
}
void usart_txt(char data) { //transmit data
UDR1 = data; //buffer the data
while(~UCSR1A & (1 << TXC)); //wait until the transmission is complete
UCSR1A |= (1 << TXC);
}
char usart_rxt() {
if(UCSR1A & (1 << RXC)) { return UDR1; } //attempt to get input,
return '\0'; //if there is none, then return null char
}
char usart_rxt_blocking() {
while(!(UCSR1A & (1 << RXC))); //wait for input via polling
return UDR1;
}
void usart_txstr(char *str) {
//transmit strong character by character untill null terminator
for(int i = 0; str[i] != '\0'; i++) usart_txt(str[i]);
}
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