dbgserutils.c

来自「vxworks的BSP开发配置文件」· C语言 代码 · 共 86 行

/* dbgSerUtils.c - Primitive serial debugging routines for polled I/O */

/* Copyright 1999 Intel Corp. */

/*
modification history
--------------------
01a,08jul99,jdg  created
*/

/*
DESCRIPTION
This file contains primitive debug routines for doing polled I/O on
the serial port. This may be used as an aid to debugging BSP issues
before the operating system is fully initialized.
*/

#ifdef INCLUDE_EARLY_SERIAL_DEBUG

#include <sioLib.h>

SIO_CHAN *dbgSerChan;

/*******************************************************************************
*
* dbgSerInit - Initialize debug serial port support
*
* This routine initializes the serial port.
*
* RETURNS: N/A
*/

void dbgSerInit (void)
    {
    dbgSerChan = sysSerialChanGet(0);
    sioIoctl(dbgSerChan, SIO_BAUD_SET, (void *)WDB_TTY_BAUD);
    }

/*******************************************************************************
*
* dbgSerOutstr - Send a string out the serial port using polled I/O
*
* This routine sends the specified string out the serial port using
* polled I/O. Note that for proper display on terminals, lines of
* text should be terminated with a carriage return as well as a line feed.
*
* RETURNS: N/A
*/

void dbgSerOutstr
    (
    char *str             /* String to be output */
    )
    {
    while (*str)
        {
        while (sioPollOutput(dbgSerChan, *str) == EAGAIN)
            continue;
        str++;
        }
    }

/*******************************************************************************
*
* dbgSerLoopback - Copy the input of the serial port to the output
*
* This routine enters an infinite loop reading a character from the
* serial port (using polled I/O) and then writing it to the serial
* port (using polled I/O).
*
* RETURNS: N/A
*/

void dbgSerLoopback()
    {
    char x;

    while (1)
        {
        while (sioPollInput(dbgSerChan, &x) == EAGAIN);
        while (sioPollOutput(dbgSerChan, x) == EAGAIN);
        }
    }

#endif /* INCLUDE_EARLY_SERIAL_DEBUG */