uart.c.svn-base

来自「usb drivers based on s3c2410」· SVN-BASE 代码 · 共 38 行

#include "config.h"

void init_uart()
{
	GPHCON	= 0x16faaa;	/*GPH2, GPH3 used as TXD0,RXD0*/
	GPHUP	= 0x7ff;	/*GPH2, GPH3 disable pull up*/

	__CONCAT(ULCON,  CONSOLE_PORT)	= 0x3;
	__CONCAT(UCON,   CONSOLE_PORT)	= 0x5;
	__CONCAT(UFCON,  CONSOLE_PORT)	= 0x0;
	__CONCAT(UMCON,  CONSOLE_PORT)	= 0x0;
	__CONCAT(UBRDIV, CONSOLE_PORT)	= ((PCLK / (CONSOLE_SPEED * 16)) - 1);
}

int sio_ischar()
{
	return ( (__CONCAT(UTRSTAT, CONSOLE_PORT) & 1) );
}

int sio_oschar()
{
	return ( (__CONCAT(UTRSTAT, CONSOLE_PORT) & 4) );
}

char sio_getc()
{
	while( !sio_ischar() )
		;
	return __CONCAT(URXH, CONSOLE_PORT);
}

void sio_putc(char c)
{
	while( !sio_oschar() )
		;
	__CONCAT(UTXH, CONSOLE_PORT) = c;
}