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Add uart synchronous transmit

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Nero 2018-01-29 19:29:02 +00:00 committed by Nero
parent 50ff908582
commit c745cd330f
2 changed files with 14 additions and 0 deletions
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13
drivers/uart_tx.c Normal file
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#include "uart_tx.h"
#include "uart.h"
#include <avr/io.h>
#include <avr/interrupt.h>
void __attribute__ ((naked)) __attribute__ ((section (".init6"))) uart_tx_init() {
UCSR0B |= (1<<TXEN0);
}
void uart_putc(unsigned char c) {
while( ( UCSR0A & ( 1 << UDRE0 ) ) == 0 ) {}
UDR0 = c;
}

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drivers/uart_tx.h Normal file
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void uart_putc(unsigned char c);