40 lines
869 B
C
40 lines
869 B
C
/*
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* CFile1.c
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*
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* Created: 4/3/2024 10:21:26 AM
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* Author: bsw9xd
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*/
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#include "serial.h"
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void usart_init() {
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volatile int ubrr = (F_CPU / (16UL * BAUD)) - 1; //TODO: why is this volatile int???
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UCSR1A = 0; //async normal communication
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UCSR1B = (1 << TXEN) | (1 << RXEN);
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UCSR1C = (1 << UCSZ0) | (1 << UCSZ1);
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UBRR1H = (unsigned char)(ubrr << 8);
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UBRR1L = (unsigned char)ubrr;
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}
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void usart_txt(char data) { //transmit data
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UDR1 = data; //buffer the data
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while(~UCSR1A & (1 << TXC)); //wait until the transmission is complete
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UCSR1A |= (1 << TXC);
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}
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char usart_rxt() {
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if(UCSR1A & (1 << RXC)) {
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return UDR1;
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}
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return '\0';
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}
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char usart_rxt_blocking() { //TODO maybe replace usart_txt
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while(!(UCSR1A & (1 << RXC))); //TODO simplify
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return UDR1;
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}
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void usart_txstr(char *str) {
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for(int i = 0; str[i] != '\0'; i++) usart_txt(str[i]);
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}
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