mirror of
https://github.com/raphnet/gc_n64_usb-v3
synced 2024-12-22 07:18:52 -05:00
44 lines
770 B
C
44 lines
770 B
C
#include <stdio.h>
|
|
#include <avr/io.h>
|
|
#include "usart1.h"
|
|
|
|
#ifdef UART1_STDOUT
|
|
static int uart1_putchar(char c, FILE *stream)
|
|
{
|
|
usart1_send(&c, 1);
|
|
return 0;
|
|
}
|
|
|
|
static FILE mystdout = FDEV_SETUP_STREAM(uart1_putchar, NULL,
|
|
_FDEV_SETUP_WRITE);
|
|
#endif
|
|
|
|
void usart1_send(void *data, int len)
|
|
{
|
|
while (!(UCSR1A & (1<<UDRE1)));
|
|
UDR1 = *((unsigned char*)data);
|
|
data++;
|
|
}
|
|
|
|
void usart1_init(void)
|
|
{
|
|
UCSR1B = (1<<TXEN1);
|
|
UCSR1C = (1<<UCSZ11) | (1<<UCSZ10);
|
|
#ifdef UCSR1D
|
|
UCSR1D = 0;
|
|
#endif
|
|
|
|
UBRR1H = 0;
|
|
#if F_CPU==8000000L
|
|
UBRR1L = 8; // 57600 at 3.5% error at 8MHz
|
|
#elif F_CPU==16000000L
|
|
UBRR1L = 16; // 57600 at 2.1% error at 16MHz
|
|
#else
|
|
#error Unsupported clock
|
|
#endif
|
|
|
|
#ifdef UART1_STDOUT
|
|
stdout = &mystdout;
|
|
#endif
|
|
}
|