source: rtems/c/src/lib/libbsp/sparc/erc32/console/debugputs.c @ 1be1e913

4.104.114.84.95
Last change on this file since 1be1e913 was 1be1e913, checked in by Ralf Corsepius <ralf.corsepius@…>, on Mar 31, 2004 at 5:17:45 AM

2004-03-31 Ralf Corsepius <ralf_corsepius@…>

  • clock/ckinit.c, console/console.c, console/debugputs.c, erc32sonic/erc32sonic.c, include/bsp.h, include/erc32.h, startup/setvec.c, startup/spurious.c, timer/timer.c: Convert to using c99 fixed size types.
  • Property mode set to 100644
File size: 2.4 KB
Line 
1/*
2 *  This file contains the TTY driver for the serial ports on the erc32.
3 *
4 *  This driver uses the termios pseudo driver.
5 *
6 *  COPYRIGHT (c) 1989-1999.
7 *  On-Line Applications Research Corporation (OAR).
8 *
9 *  The license and distribution terms for this file may be
10 *  found in the file LICENSE in this distribution or at
11 *  http://www.rtems.com/license/LICENSE.
12 *
13 *  $Id$
14 */
15
16#include <bsp.h>
17#include <rtems/libio.h>
18#include <stdlib.h>
19#include <assert.h>
20
21/*
22 *  console_outbyte_polled
23 *
24 *  This routine transmits a character using polling.
25 */
26
27void console_outbyte_polled(
28  int  port,
29  unsigned char ch
30)
31{
32  if ( port == 0 ) {
33    while ( (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_THEA) == 0 );
34    ERC32_MEC.UART_Channel_A = (unsigned int) ch;
35    return;
36  }
37
38  while ( (ERC32_MEC.UART_Status & ERC32_MEC_UART_STATUS_THEB) == 0 );
39  ERC32_MEC.UART_Channel_B = (unsigned int) ch;
40}
41
42/*
43 *  console_inbyte_nonblocking
44 *
45 *  This routine polls for a character.
46 */
47
48int console_inbyte_nonblocking( int port )
49{
50  int UStat;
51
52  UStat = ERC32_MEC.UART_Status;
53
54  switch (port) {
55
56    case 0:
57      if (UStat & ERC32_MEC_UART_STATUS_ERRA) {
58        ERC32_MEC.UART_Status = ERC32_MEC_UART_STATUS_CLRA;
59        ERC32_MEC.Control = ERC32_MEC.Control;
60      }
61
62      if ((UStat & ERC32_MEC_UART_STATUS_DRA) == 0)
63         return -1;
64      return (int) ERC32_MEC.UART_Channel_A;
65      return 1;
66
67    case 1:
68      if (UStat & ERC32_MEC_UART_STATUS_ERRB) {
69        ERC32_MEC.UART_Status = ERC32_MEC_UART_STATUS_CLRB;
70        ERC32_MEC.Control = ERC32_MEC.Control;
71      }
72
73      if ((UStat & ERC32_MEC_UART_STATUS_DRB) == 0)
74        return -1;
75      return (int) ERC32_MEC.UART_Channel_B;
76
77    default:
78      assert( 0 );
79  }
80
81  return -1;
82}
83
84/*
85 *  DEBUG_puts
86 *
87 *  This should be safe in the event of an error.  It attempts to insure
88 *  that no TX empty interrupts occur while it is doing polled IO.  Then
89 *  it restores the state of that external interrupt.
90 *
91 *  Input parameters:
92 *    string  - pointer to debug output string
93 *
94 *  Output parameters:  NONE
95 *
96 *  Return values:      NONE
97 */
98
99void DEBUG_puts(
100  char *string
101)
102{
103  char *s;
104  uint32_t   old_level;
105
106  ERC32_Disable_interrupt( ERC32_INTERRUPT_UART_A_RX_TX, old_level );
107    for ( s = string ; *s ; s++ ) 
108      console_outbyte_polled( 0, *s );
109
110    console_outbyte_polled( 0, '\r' );
111    console_outbyte_polled( 0, '\n' );
112  ERC32_Restore_interrupt( ERC32_INTERRUPT_UART_A_RX_TX, old_level );
113}
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