35 lines
563 B
C
35 lines
563 B
C
#include <avr/io.h>
|
|
#include <stdio.h>
|
|
#include "interface.h"
|
|
#include <stdint.h>
|
|
|
|
#define special_output_port (*((volatile char *)0x20))
|
|
static int output_char(char c, FILE *stream)
|
|
{
|
|
special_output_port = c;
|
|
return 0;
|
|
}
|
|
|
|
static FILE mystdout = FDEV_SETUP_STREAM(output_char, NULL, _FDEV_SETUP_WRITE);
|
|
|
|
void interface_init()
|
|
{
|
|
// Set timer 1 to count cycles
|
|
TCCR1B = 1;
|
|
|
|
// Set output to simulator
|
|
stdout = &mystdout;
|
|
stderr = &mystdout;
|
|
}
|
|
|
|
|
|
void start_timing()
|
|
{
|
|
TCNT1 = 0;
|
|
}
|
|
|
|
uint16_t end_timing()
|
|
{
|
|
return TCNT1 - 9;
|
|
}
|