uart.c

来自「usb drivers based on s3c2410」· C语言 代码 · 共 41 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 << 4) - 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;
}