write.c

来自「xilinx内嵌CPU下的UCOS移植」· C语言 代码 · 共 50 行

////////////////////////////////////////////////////////////////////////////////
//
//     XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"
//     SOLELY FOR USE IN DEVELOPING PROGRAMS AND SOLUTIONS FOR
//     XILINX DEVICES.  BY PROVIDING THIS DESIGN, CODE, OR INFORMATION
//     AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE, APPLICATION
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//     WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE
//     IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR
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//     INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
//     FOR A PARTICULAR PURPOSE.
//     
//     (c) Copyright 2006 Xilinx, Inc.
//     All rights reserved.
//
////////////////////////////////////////////////////////////////////////////////

/* write.c -- write bytes to an output device.
 */

extern int  outbyte(char);

/*
 * write -- write bytes to the serial port. Ignore fd, since
 *          stdout and stderr are the same. Since we have no filesystem,
 *          open will only return an error.
 */
int
write (int fd, char* buf, int nbytes)
	/*
       int fd;
       char *buf;
       int nbytes;
       */
{
  int i;

  for (i = 0; i < nbytes; i++) {
    if (*(buf + i) == '\n') {
      outbyte ('\r');
    }
    outbyte (*(buf + i));
  }
  return (nbytes);
}