osd-contiki/platform/msb430/msb430-slip-arch.c
2009-06-29 12:46:49 +00:00

57 lines
1.1 KiB
C

#include "dev/msb430-uart1.h"
#include "dev/rs232.h"
#include "sys/clock.h"
#include "dev/slip.h"
void
slip_arch_writeb(unsigned char c)
{
rs232_send(c);
}
/*---------------------------------------------------------------------------*/
/*
* The serial line is used to transfer IP packets using slip. To make
* it possible to send debug output over the same line we send debug
* output as slip frames (i.e delimeted by SLIP_END).
*
*/
int
putchar(int c)
{
#define SLIP_END 0300
static char debug_frame = 0;
if(!debug_frame) { /* Start of debug output */
slip_arch_writeb(SLIP_END);
slip_arch_writeb('\r'); /* Type debug line == '\r' */
debug_frame = 1;
}
slip_arch_writeb((char)c);
/*
* Line buffered output, a newline marks the end of debug output and
* implicitly flushes debug output.
*/
if(c == '\n') {
slip_arch_writeb(SLIP_END);
debug_frame = 0;
}
clock_delay(100);
return c;
}
/**
* Initalize the RS232 port and the SLIP driver.
*
*/
void
slip_arch_init(unsigned long ubr)
{
rs232_set_input(slip_input_byte);
}