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5
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1 /*
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2 * SpanDSP - a series of DSP components for telephony
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3 *
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4 * async_tests.c - Tests for asynchronous serial processing.
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5 *
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6 * Written by Steve Underwood <steveu@coppice.org>
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7 *
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8 * Copyright (C) 2004 Steve Underwood
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9 *
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10 * All rights reserved.
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11 *
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12 * This program is free software; you can redistribute it and/or modify
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13 * it under the terms of the GNU General Public License version 2, as
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14 * published by the Free Software Foundation.
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15 *
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16 * This program is distributed in the hope that it will be useful,
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17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 * GNU General Public License for more details.
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20 *
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21 * You should have received a copy of the GNU General Public License
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22 * along with this program; if not, write to the Free Software
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23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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24 *
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25 * $Id: async_tests.c,v 1.12 2006/11/19 14:07:26 steveu Exp $
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26 */
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27
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28 /*! \file */
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29
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30 /*! \page async_tests_page Asynchronous bit stream tests
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31 \section async_tests_page_sec_1 What does it do?
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32 */
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33
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34 #ifdef HAVE_CONFIG_H
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35 #include "config.h"
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36 #endif
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37
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38 #include <inttypes.h>
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39 #include <stdlib.h>
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40 #include <stdio.h>
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41 #include <string.h>
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42 #if defined(HAVE_TGMATH_H)
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43 #include <tgmath.h>
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44 #endif
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45 #if defined(HAVE_MATH_H)
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46 #include <math.h>
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47 #endif
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48 #include <assert.h>
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49 #include <audiofile.h>
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50 #include <tiffio.h>
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51
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52 #include "spandsp.h"
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53
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54 async_rx_state_t rx_async;
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55 async_tx_state_t tx_async;
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56
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57 int full_len;
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58 uint8_t old_buf[1000];
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59 uint8_t new_buf[1000];
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60
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61 volatile int tx_async_chars;
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62 volatile int rx_async_chars;
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63 volatile int rx_async_char_mask;
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64
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65 int v14_test_async_tx_get_bit(void *user_data);
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66
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67 int v14_test_async_tx_get_bit(void *user_data)
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68 {
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69 async_tx_state_t *s;
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70 int bit;
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71 static int destuff = 0;
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72
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73 /* Special routine to test V.14 rate adaption, by randomly skipping
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74 stop bits. */
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75 s = (async_tx_state_t *) user_data;
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76 if (s->bitpos == 0)
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77 {
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78 /* Start bit */
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79 bit = 0;
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80 s->byte_in_progress = s->get_byte(s->user_data);
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81 s->parity_bit = 0;
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82 s->bitpos++;
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83 }
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84 else if (s->bitpos <= s->data_bits)
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85 {
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86 bit = s->byte_in_progress & 1;
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87 s->byte_in_progress >>= 1;
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88 s->parity_bit ^= bit;
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89 s->bitpos++;
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90 if (!s->parity && s->bitpos == s->data_bits + 1)
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91 {
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92 /* Drop the stop bit on every fourth character for V.14 simulation*/
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93 if ((++destuff & 3) == 0)
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94 s->bitpos = 0;
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95 }
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96 }
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97 else if (s->parity && s->bitpos == s->data_bits + 1)
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98 {
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99 if (s->parity == ASYNC_PARITY_ODD)
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100 s->parity_bit ^= 1;
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101 bit = s->parity_bit;
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102 s->bitpos++;
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103 /* Drop the stop bit on every fourth character for V.14 simulation */
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104 if ((++destuff & 3) == 0)
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105 s->bitpos = 0;
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106 }
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107 else
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108 {
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109 /* Stop bit(s) */
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110 bit = 1;
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111 s->bitpos++;
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112 if (s->bitpos > s->data_bits + s->stop_bits)
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113 s->bitpos = 0;
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114 }
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115 return bit;
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116 }
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117 /*- End of function --------------------------------------------------------*/
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118
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119 static int test_get_async_byte(void *user_data)
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120 {
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121 int byte;
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122
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123 byte = tx_async_chars & 0xFF;
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124 tx_async_chars++;
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125 return byte;
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126 }
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127 /*- End of function --------------------------------------------------------*/
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128
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129 static void test_put_async_byte(void *user_data, int byte)
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130 {
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131 if ((rx_async_chars & rx_async_char_mask) != byte)
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132 printf("Received byte is 0x%X (expected 0x%X)\n", byte, rx_async_chars);
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133 rx_async_chars++;
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134 }
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135 /*- End of function --------------------------------------------------------*/
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136
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137 int main(int argc, char *argv[])
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138 {
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139 int bit;
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140
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141 printf("Test with async 8N1\n");
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142 async_tx_init(&tx_async, 8, ASYNC_PARITY_NONE, 1, FALSE, test_get_async_byte, NULL);
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143 async_rx_init(&rx_async, 8, ASYNC_PARITY_NONE, 1, FALSE, test_put_async_byte, NULL);
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144 tx_async_chars = 0;
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145 rx_async_chars = 0;
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146 rx_async_char_mask = 0xFF;
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147 while (rx_async_chars < 1000)
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148 {
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149 bit = async_tx_get_bit(&tx_async);
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150 async_rx_put_bit(&rx_async, bit);
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151 }
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152 printf("Chars=%d/%d, PE=%d, FE=%d\n", tx_async_chars, rx_async_chars, rx_async.parity_errors, rx_async.framing_errors);
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153 if (tx_async_chars != rx_async_chars
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154 ||
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155 rx_async.parity_errors
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156 ||
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157 rx_async.framing_errors)
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158 {
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159 printf("Test failed.\n");
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160 exit(2);
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161 }
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162
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163 printf("Test with async 7E1\n");
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164 async_tx_init(&tx_async, 7, ASYNC_PARITY_EVEN, 1, FALSE, test_get_async_byte, NULL);
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165 async_rx_init(&rx_async, 7, ASYNC_PARITY_EVEN, 1, FALSE, test_put_async_byte, NULL);
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166 tx_async_chars = 0;
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167 rx_async_chars = 0;
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168 rx_async_char_mask = 0x7F;
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169 while (rx_async_chars < 1000)
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170 {
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171 bit = async_tx_get_bit(&tx_async);
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172 async_rx_put_bit(&rx_async, bit);
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173 }
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174 printf("Chars=%d/%d, PE=%d, FE=%d\n", tx_async_chars, rx_async_chars, rx_async.parity_errors, rx_async.framing_errors);
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175 if (tx_async_chars != rx_async_chars
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176 ||
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177 rx_async.parity_errors
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178 ||
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179 rx_async.framing_errors)
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180 {
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181 printf("Test failed.\n");
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182 exit(2);
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183 }
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184
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185 printf("Test with async 8O1\n");
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186 async_tx_init(&tx_async, 8, ASYNC_PARITY_ODD, 1, FALSE, test_get_async_byte, NULL);
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187 async_rx_init(&rx_async, 8, ASYNC_PARITY_ODD, 1, FALSE, test_put_async_byte, NULL);
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188 tx_async_chars = 0;
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189 rx_async_chars = 0;
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190 rx_async_char_mask = 0xFF;
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191 while (rx_async_chars < 1000)
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192 {
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193 bit = async_tx_get_bit(&tx_async);
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194 async_rx_put_bit(&rx_async, bit);
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195 }
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196 printf("Chars=%d/%d, PE=%d, FE=%d\n", tx_async_chars, rx_async_chars, rx_async.parity_errors, rx_async.framing_errors);
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197 if (tx_async_chars != rx_async_chars
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198 ||
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199 rx_async.parity_errors
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200 ||
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201 rx_async.framing_errors)
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202 {
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203 printf("Test failed.\n");
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204 exit(2);
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205 }
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206
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207 printf("Test with async 8O1 and V.14\n");
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208 async_tx_init(&tx_async, 8, ASYNC_PARITY_ODD, 1, TRUE, test_get_async_byte, NULL);
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209 async_rx_init(&rx_async, 8, ASYNC_PARITY_ODD, 1, TRUE, test_put_async_byte, NULL);
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210 tx_async_chars = 0;
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211 rx_async_chars = 0;
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212 rx_async_char_mask = 0xFF;
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213 while (rx_async_chars < 1000)
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214 {
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215 bit = v14_test_async_tx_get_bit(&tx_async);
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216 async_rx_put_bit(&rx_async, bit);
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217 }
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218 printf("Chars=%d/%d, PE=%d, FE=%d\n", tx_async_chars, rx_async_chars, rx_async.parity_errors, rx_async.framing_errors);
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219 if (tx_async_chars != rx_async_chars + 1
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220 ||
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221 rx_async.parity_errors
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222 ||
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223 rx_async.framing_errors)
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224 {
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225 printf("Test failed.\n");
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226 exit(2);
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227 }
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228
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229 printf("Test with async 5N2\n");
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230 async_tx_init(&tx_async, 5, ASYNC_PARITY_NONE, 2, FALSE, test_get_async_byte, NULL);
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231 async_rx_init(&rx_async, 5, ASYNC_PARITY_NONE, 2, FALSE, test_put_async_byte, NULL);
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232 tx_async_chars = 0;
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233 rx_async_chars = 0;
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234 rx_async_char_mask = 0x1F;
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235 while (rx_async_chars < 1000)
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236 {
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237 bit = async_tx_get_bit(&tx_async);
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238 async_rx_put_bit(&rx_async, bit);
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239 }
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240 printf("Chars=%d/%d, PE=%d, FE=%d\n", tx_async_chars, rx_async_chars, rx_async.parity_errors, rx_async.framing_errors);
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241 if (tx_async_chars != rx_async_chars
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242 ||
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243 rx_async.parity_errors
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244 ||
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245 rx_async.framing_errors)
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246 {
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247 printf("Test failed.\n");
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248 exit(2);
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249 }
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250
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251 printf("Tests passed.\n");
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252 return 0;
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253 }
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254 /*- End of function --------------------------------------------------------*/
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255 /*- End of file ------------------------------------------------------------*/
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