toolchain/gcc/libgloss/mcore/cmb-outbyte.c

   1 /* cmb-outbyte.c -- outbyte function for CMB1200 eval board.
   2  *
   3  * Copyright (c) 1999 Cygnus Support
   4  *
   5  * The authors hereby grant permission to use, copy, modify, distribute,
   6  * and license this software and its documentation for any purpose, provided
   7  * that existing copyright notices are retained in all copies and that this
   8  * notice is included verbatim in any distributions. No written agreement,
   9  * license, or royalty fee is required for any of the authorized uses.
  10  * Modifications to this software may be copyrighted by their authors
  11  * and need not follow the licensing terms described here, provided that
  12  * the new terms are clearly indicated on the first page of each file where
  13  * they apply.
  14  */
  15 #include <_ansi.h>
  16
  17 #define _TX  0x40
  18 #define _SR  0x86
  19
  20 #define UART0_BASE 0x10009000
  21 #define UART1_BASE 0x1000a000
  22
  23 #define UART_BASE UART0_BASE
  24
  25 #define TXREG ((volatile unsigned short *)(UART_BASE + _TX))
  26 #define SRREG ((volatile unsigned short *)(UART_BASE + _SR))
  27
  28 #define TRDY  0x2000
  29
  30 #define GDB_QUOTE_CHAR 15  /* ^O */
  31
  32 /*
  33  * outbyte -- send a byte to the UART.
  34  */
  35 void
  36 _DEFUN (outbyte, (ch),
  37         char ch)
  38 {
  39     while (!(*SRREG & TRDY))
  40         ;
  41     *TXREG = GDB_QUOTE_CHAR;
  42
  43     while (!(*SRREG & TRDY))
  44         ;
  45     *TXREG = (unsigned short)ch;
  46 }