2 FreeRTOS V7.0.1 - Copyright (C) 2011 Real Time Engineers Ltd.
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5 ***************************************************************************
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7 * FreeRTOS tutorial books are available in pdf and paperback. *
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8 * Complete, revised, and edited pdf reference manuals are also *
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11 * Purchasing FreeRTOS documentation will not only help you, by *
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12 * ensuring you get running as quickly as possible and with an *
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13 * in-depth knowledge of how to use FreeRTOS, it will also help *
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14 * the FreeRTOS project to continue with its mission of providing *
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15 * professional grade, cross platform, de facto standard solutions *
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16 * for microcontrollers - completely free of charge! *
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18 * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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20 * Thank you for using FreeRTOS, and thank you for your support! *
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22 ***************************************************************************
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25 This file is part of the FreeRTOS distribution.
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27 FreeRTOS is free software; you can redistribute it and/or modify it under
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28 the terms of the GNU General Public License (version 2) as published by the
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29 Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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30 >>>NOTE<<< The modification to the GPL is included to allow you to
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31 distribute a combined work that includes FreeRTOS without being obliged to
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32 provide the source code for proprietary components outside of the FreeRTOS
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33 kernel. FreeRTOS is distributed in the hope that it will be useful, but
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34 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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35 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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36 more details. You should have received a copy of the GNU General Public
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37 License and the FreeRTOS license exception along with FreeRTOS; if not it
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38 can be viewed here: http://www.freertos.org/a00114.html and also obtained
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39 by writing to Richard Barry, contact details for whom are available on the
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44 http://www.FreeRTOS.org - Documentation, latest information, license and
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47 http://www.SafeRTOS.com - A version that is certified for use in safety
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50 http://www.OpenRTOS.com - Commercial support, development, porting,
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51 licensing and training services.
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54 /* Scheduler includes. */
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55 #include "FreeRTOS.h"
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59 * The register test task as described at the top of this file.
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61 void vRegisterTest1( void *pvParameters );
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62 void vRegisterTest2( void *pvParameters );
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64 /* Variables that are incremented on each iteration of the reg test tasks -
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65 provided the tasks have not reported any errors. The check task inspects these
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66 variables to ensure they are still incrementing as expected. If a variable
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67 stops incrementing then it is likely that its associate task has stalled. */
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68 volatile unsigned long ulRegTest1CycleCount = 0UL, ulRegTest2CycleCount = 0UL;
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70 /*-----------------------------------------------------------*/
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72 void vRegisterTest1( void *pvParameters )
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74 //_RB_ Why can R5 not be used in this test?
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76 /* This task uses an infinite loop that is implemented in the assembly
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79 First fill the registers with known values. */
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80 asm volatile ( " addi r3, r0, 3 \n\t" \
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81 " addi r4, r0, 4 \n\t" \
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82 " addi r6, r0, 6 \n\t" \
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83 " addi r7, r0, 7 \n\t" \
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84 " addi r8, r0, 8 \n\t" \
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85 " addi r9, r0, 9 \n\t" \
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86 " addi r10, r0, 10 \n\t" \
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87 " addi r11, r0, 11 \n\t" \
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88 " addi r12, r0, 12 \n\t" \
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89 " addi r16, r0, 16 \n\t" \
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90 " addi r19, r0, 19 \n\t" \
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91 " addi r20, r0, 20 \n\t" \
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92 " addi r21, r0, 21 \n\t" \
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93 " addi r22, r0, 22 \n\t" \
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94 " addi r23, r0, 23 \n\t" \
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95 " addi r24, r0, 24 \n\t" \
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96 " addi r25, r0, 25 \n\t" \
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97 " addi r26, r0, 26 \n\t" \
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98 " addi r27, r0, 27 \n\t" \
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99 " addi r28, r0, 28 \n\t" \
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100 " addi r29, r0, 29 \n\t" \
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101 " addi r30, r0, 30 \n\t" \
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102 " addi r31, r0, 31 \n\t"
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105 /* Now test the register values to ensure they contain the same value that
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106 was written to them above. This task will get preempted frequently so
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107 other tasks are likely to have executed since the register values were
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110 asm volatile ( "Loop_Start_1: \n\t" \
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111 " xori r18, r3, 3 \n\t" \
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112 " bnei r18, Error_Loop_1 \n\t" \
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113 " xori r18, r4, 4 \n\t" \
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114 " bnei r18, Error_Loop_1 \n\t" \
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115 " xori r18, r6, 6 \n\t" \
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116 " bnei r18, Error_Loop_1 \n\t" \
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117 " xori r18, r7, 7 \n\t" \
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118 " bnei r18, Error_Loop_1 \n\t" \
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119 " xori r18, r8, 8 \n\t" \
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120 " bnei r18, Error_Loop_1 \n\t" \
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121 " xori r18, r9, 9 \n\t" \
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122 " bnei r18, Error_Loop_1 \n\t" \
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123 " xori r18, r10, 10 \n\t" \
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124 " bnei r18, Error_Loop_1 \n\t" \
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125 " xori r18, r11, 11 \n\t" \
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126 " bnei r18, Error_Loop_1 \n\t" \
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127 " xori r18, r12, 12 \n\t" \
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128 " bnei r18, Error_Loop_1 \n\t" \
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129 " xori r18, r16, 16 \n\t" \
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130 " bnei r18, Error_Loop_1 \n\t" \
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131 " xori r18, r19, 19 \n\t" \
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132 " bnei r18, Error_Loop_1 \n\t" \
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133 " xori r18, r20, 20 \n\t" \
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134 " bnei r18, Error_Loop_1 \n\t" \
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135 " xori r18, r21, 21 \n\t" \
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136 " bnei r18, Error_Loop_1 \n\t" \
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137 " xori r18, r22, 22 \n\t" \
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138 " bnei r18, Error_Loop_1 \n\t" \
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139 " xori r18, r23, 23 \n\t" \
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140 " bnei r18, Error_Loop_1 \n\t" \
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141 " xori r18, r24, 24 \n\t" \
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142 " bnei r18, Error_Loop_1 \n\t" \
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143 " xori r18, r25, 25 \n\t" \
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144 " bnei r18, Error_Loop_1 \n\t" \
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145 " xori r18, r26, 26 \n\t" \
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146 " bnei r18, Error_Loop_1 \n\t" \
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147 " xori r18, r27, 27 \n\t" \
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148 " bnei r18, Error_Loop_1 \n\t" \
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149 " xori r18, r28, 28 \n\t" \
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150 " bnei r18, Error_Loop_1 \n\t" \
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151 " xori r18, r29, 29 \n\t" \
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152 " bnei r18, Error_Loop_1 \n\t" \
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153 " xori r18, r30, 30 \n\t" \
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154 " bnei r18, Error_Loop_1 \n\t" \
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155 " xori r18, r31, 31 \n\t" \
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156 " bnei r18, Error_Loop_1 \n\t"
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159 /* If this task has not branched to the error loop, then everything is ok,
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160 and the check variable should be incremented to indicate that this task
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161 is still running. Then, brach back to the top to check the registers
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163 asm volatile ( " lwi r18, r0, ulRegTest1CycleCount \n\t" \
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164 " addik r18, r18, 1 \n\t" \
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165 " swi r18, r0, ulRegTest1CycleCount \n\t" \
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167 " bri Loop_Start_1 "
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170 /* The test function will branch here if it discovers an error. This part
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171 of the code just sits in a NULL loop, which prevents the check variable
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172 incrementing any further to allow the check timer to recognize that this
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173 test has failed. */
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174 asm volatile ( "Error_Loop_1: \n\t" \
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179 /*-----------------------------------------------------------*/
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181 void vRegisterTest2( void *pvParameters )
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183 /* This task uses an infinite loop that is implemented in the assembly
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186 First fill the registers with known values. */
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187 asm volatile ( " addi r16, r0, 1016 \n\t" \
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188 " addi r19, r0, 1019 \n\t" \
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189 " addi r20, r0, 1020 \n\t" \
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190 " addi r21, r0, 1021 \n\t" \
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191 " addi r22, r0, 1022 \n\t" \
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192 " addi r23, r0, 1023 \n\t" \
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193 " addi r24, r0, 1024 \n\t" \
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194 " addi r25, r0, 1025 \n\t" \
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195 " addi r26, r0, 1026 \n\t" \
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196 " addi r27, r0, 1027 \n\t" \
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197 " addi r28, r0, 1028 \n\t" \
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198 " addi r29, r0, 1029 \n\t" \
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199 " addi r30, r0, 1030 \n\t" \
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200 " addi r31, r0, 1031 \n\t" \
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207 asm volatile ( " addi r3, r0, 103 \n\t" \
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208 " addi r4, r0, 104 \n\t" \
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209 " addi r6, r0, 106 \n\t" \
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210 " addi r7, r0, 107 \n\t" \
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211 " addi r8, r0, 108 \n\t" \
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212 " addi r9, r0, 109 \n\t" \
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213 " addi r10, r0, 1010 \n\t" \
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214 " addi r11, r0, 1011 \n\t" \
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215 " addi r12, r0, 1012 \n\t" \
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218 /* taskYIELD() could have changed temporaries - set them back to those
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219 expected by the reg test task. */
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221 /* Now test the register values to ensure they contain the same value that
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222 was written to them above. This task will get preempted frequently so
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223 other tasks are likely to have executed since the register values were
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225 asm volatile ( " xori r18, r3, 103 \n\t" \
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226 " bnei r18, Error_Loop_2 \n\t" \
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227 " xori r18, r4, 104 \n\t" \
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228 " bnei r18, Error_Loop_2 \n\t" \
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229 " xori r18, r6, 106 \n\t" \
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230 " bnei r18, Error_Loop_2 \n\t" \
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231 " xori r18, r7, 107 \n\t" \
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232 " bnei r18, Error_Loop_2 \n\t" \
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233 " xori r18, r8, 108 \n\t" \
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234 " bnei r18, Error_Loop_2 \n\t" \
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235 " xori r18, r9, 109 \n\t" \
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236 " bnei r18, Error_Loop_2 \n\t" \
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237 " xori r18, r10, 1010 \n\t" \
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238 " bnei r18, Error_Loop_2 \n\t" \
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239 " xori r18, r11, 1011 \n\t" \
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240 " bnei r18, Error_Loop_2 \n\t" \
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241 " xori r18, r12, 1012 \n\t" \
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242 " bnei r18, Error_Loop_2 \n\t" \
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243 " xori r18, r16, 1016 \n\t" \
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244 " bnei r18, Error_Loop_2 \n\t" \
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245 " xori r18, r19, 1019 \n\t" \
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246 " bnei r18, Error_Loop_2 \n\t" \
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247 " xori r18, r20, 1020 \n\t" \
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248 " bnei r18, Error_Loop_2 \n\t" \
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249 " xori r18, r21, 1021 \n\t" \
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250 " bnei r18, Error_Loop_2 \n\t" \
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251 " xori r18, r22, 1022 \n\t" \
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252 " bnei r18, Error_Loop_2 \n\t" \
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253 " xori r18, r23, 1023 \n\t" \
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254 " bnei r18, Error_Loop_2 \n\t" \
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255 " xori r18, r24, 1024 \n\t" \
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256 " bnei r18, Error_Loop_2 \n\t" \
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257 " xori r18, r25, 1025 \n\t" \
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258 " bnei r18, Error_Loop_2 \n\t" \
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259 " xori r18, r26, 1026 \n\t" \
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260 " bnei r18, Error_Loop_2 \n\t" \
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261 " xori r18, r27, 1027 \n\t" \
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262 " bnei r18, Error_Loop_2 \n\t" \
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263 " xori r18, r28, 1028 \n\t" \
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264 " bnei r18, Error_Loop_2 \n\t" \
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265 " xori r18, r29, 1029 \n\t" \
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266 " bnei r18, Error_Loop_2 \n\t" \
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267 " xori r18, r30, 1030 \n\t" \
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268 " bnei r18, Error_Loop_2 \n\t" \
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269 " xori r18, r31, 1031 \n\t" \
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270 " bnei r18, Error_Loop_2 \n\t"
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273 /* If this task has not branched to the error loop, then everything is ok,
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274 and the check variable should be incremented to indicate that this task
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275 is still running. Then, brach back to the top to check the registers
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277 asm volatile ( " lwi r18, r0, ulRegTest2CycleCount \n\t" \
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278 " addik r18, r18, 1 \n\t" \
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279 " swi r18, r0, ulRegTest2CycleCount \n\t" \
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281 " bri Loop_Start_2 "
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284 /* The test function will branch here if it discovers an error. This part
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285 of the code just sits in a NULL loop, which prevents the check variable
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286 incrementing any further to allow the check timer to recognize that this
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287 test has failed. */
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288 asm volatile ( "Error_Loop_2: \n\t" \
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