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annotate packages/hal/sh/cq7708/current/src/hal_diag.c @ 94:4642a6d35749 ecos-sw-2000-06-02

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Merge from eCos master repository on 2000-06-02-07:47:04-BST
author jlarmour
date Fri, 02 Jun 2000 17:35:00 +0000
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children 5a0cc6c243a9
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94
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1 //=============================================================================
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2 //
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3 // hal_diag.c
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4 //
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5 // HAL diagnostic output code
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6 //
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7 //=============================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.1 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://www.redhat.com/
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //=============================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): nickg, jskov
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35 // Contributors: nickg, jskov
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36 // Date: 1999-03-23
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37 // Purpose: HAL diagnostic output
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38 // Description: Implementations of HAL diagnostic output support.
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39 //
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40 //####DESCRIPTIONEND####
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41 //
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42 //=============================================================================
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43
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44 #include <pkgconf/hal.h>
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45
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46 #include <cyg/hal/hal_diag.h> // our header.
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47
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48 #if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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49 #include <cyg/hal/hal_stub.h> // hal_output_gdb_string
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50 #endif
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51
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52 #include <cyg/infra/cyg_type.h> // base types, externC
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53 #include <cyg/hal/hal_io.h> // IO macros
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54 #include <cyg/hal/hal_intr.h> // Interrupt macros
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55
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56 #include <cyg/hal/sh_sci.inl>
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57
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58 //-----------------------------------------------------------------------------
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59
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60 #if defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs)
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61
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62 #define CYG_HAL_DIAG_GDB
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63
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64 #elif defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
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65
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66 #define CYG_HAL_DIAG_GDB
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67
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68 #endif
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69
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70 //-----------------------------------------------------------------------------
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71
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72 void hal_diag_init(void)
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73 {
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74 hal_sci_init_serial();
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75 }
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76
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77 void
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78 hal_diag_write_char_serial( char c )
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79 {
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80 hal_sci_put_char(c);
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81 }
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82
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83 void
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84 hal_diag_read_char(char *c)
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85 {
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86 *c = (char) hal_sci_get_char();
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87 }
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88
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89 externC cyg_bool cyg_hal_is_break(char *buf, int size);
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90 externC void cyg_hal_user_break(CYG_ADDRWORD *regs);
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91
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92 // Packet function
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93 void
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94 hal_diag_write_char(char c)
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95 {
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96 #ifdef CYG_HAL_DIAG_GDB
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97 static char line[100];
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98 static int pos = 0;
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99
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100 // No need to send CRs
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101 if( c == '\r' ) return;
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102
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103 line[pos++] = c;
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104
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105 if( c == '\n' || pos == sizeof(line) )
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106 {
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107 CYG_INTERRUPT_STATE old;
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108
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109 // Disable interrupts. This prevents GDB trying to interrupt us
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110 // while we are in the middle of sending a packet. The serial
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111 // receive interrupt will be seen when we re-enable interrupts
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112 // later.
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113
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114 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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115 CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION(old);
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116 #else
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117 HAL_DISABLE_INTERRUPTS(old);
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118 #endif
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119
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120 while(1)
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121 {
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122 char c1;
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123 static char hex[] = "0123456789ABCDEF";
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124 cyg_uint8 csum = 0;
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125 int i;
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126
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127 hal_diag_write_char_serial('$');
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128 hal_diag_write_char_serial('O');
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129 csum += 'O';
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130 for( i = 0; i < pos; i++ )
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131 {
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132 char ch = line[i];
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133 char h = hex[(ch>>4)&0xF];
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134 char l = hex[ch&0xF];
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135 hal_diag_write_char_serial(h);
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136 hal_diag_write_char_serial(l);
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137 csum += h;
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138 csum += l;
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139 }
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140 hal_diag_write_char_serial('#');
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141 hal_diag_write_char_serial(hex[(csum>>4)&0xF]);
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142 hal_diag_write_char_serial(hex[csum&0xF]);
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143
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144 // Wait for the ACK character '+' from GDB here and handle
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145 // receiving a ^C instead.
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146 hal_diag_read_char(&c1);
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147
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148 if( c1 == '+' )
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149 break; // a good acknowledge
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150
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151 // Check for user break.
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152 if( cyg_hal_is_break( &c1, 1 ) )
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153 cyg_hal_user_break( NULL );
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154
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155 // otherwise, loop round again
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156 }
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157
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158 pos = 0;
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159
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160 // And re-enable interrupts
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161 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
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162 CYG_HAL_GDB_LEAVE_CRITICAL_IO_REGION(old);
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163 #else
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164 HAL_RESTORE_INTERRUPTS(old);
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165 #endif
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166 }
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167 #else // CYG_HAL_DIAG_GDB
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168 hal_diag_write_char_serial(c);
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169 #endif
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170 }
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171
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172 //-----------------------------------------------------------------------------
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173 // Led control
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174 #define LED 0xa8000000
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175
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176 void
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177 hal_diag_led_on( void )
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178 {
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179 HAL_WRITE_UINT8(LED, 0x18);
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180 }
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181
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182 void
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183 hal_diag_led_off( void )
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184 {
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185 HAL_WRITE_UINT8(LED, 0);
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186 }
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187
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188 //-----------------------------------------------------------------------------
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189 // End of hal_diag.c