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  1. /*
  2.  * Copyright (c) 2009 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup genarch
  30.  * @{
  31.  */
  32. /**
  33.  * @file
  34.  * @brief Serial line processing.
  35.  */
  36.  
  37. #include <genarch/srln/srln.h>
  38. #include <console/chardev.h>
  39. #include <console/console.h>
  40. #include <proc/thread.h>
  41. #include <arch.h>
  42.  
  43. static indev_t srlnout;
  44.  
  45. indev_operations_t srlnout_ops = {
  46.     .poll = NULL
  47. };
  48.  
  49. static void ksrln(void *arg)
  50. {
  51.     indev_t *in = (indev_t *) arg;
  52.     bool cr = false;
  53.    
  54.     while (true) {
  55.         uint8_t ch = _getc(in);
  56.        
  57.         if ((ch == '\n') && (cr)) {
  58.             cr = false;
  59.             continue;
  60.         }
  61.        
  62.         if (ch == '\r') {
  63.             ch = '\n';
  64.             cr = true;
  65.         } else
  66.             cr = false;
  67.        
  68.         if (ch == 0x7f)
  69.             ch = '\b';
  70.        
  71.         indev_push_character(stdin, ch);
  72.     }
  73. }
  74.  
  75. void srln_init(indev_t *devin)
  76. {
  77.     indev_initialize("srln", &srlnout, &srlnout_ops);
  78.     thread_t *thread
  79.         = thread_create(ksrln, devin, TASK, 0, "ksrln", false);
  80.    
  81.     if (thread) {
  82.         stdin = &srlnout;
  83.         thread_ready(thread);
  84.     }
  85. }
  86.  
  87. /** @}
  88.  */
  89.