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/*
* Copyright 2020 Daniel Friesel
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "driver/stdout.h"
#include <avr/io.h>
#include <avr/interrupt.h>
void StandardOutput::setup()
{
#ifndef KOUT_NOP
PORTC |= _BV(PC1);
DDRC |= _BV(DDC1);
#endif
}
void StandardOutput::put(char c)
{
#ifndef KOUT_NOP
unsigned char i = 1;
PORTC &= ~_BV(PC1);
__builtin_avr_delay_cycles(59);
while (i < 0x80) {
if (c & i) {
PORTC |= _BV(PC1);
} else {
PORTC &= ~_BV(PC1);
}
i <<= 1;
__builtin_avr_delay_cycles(54);
}
__builtin_avr_delay_cycles(6);
PORTC &= ~_BV(PC1);
__builtin_avr_delay_cycles(67);
PORTC |= _BV(PC1);
__builtin_avr_delay_cycles(150);
if (c == '\n') {
put('\r');
}
#endif
}
StandardOutput kout;
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