1 | /* |
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2 | * COPYRIGHT (c) 1998 by Radstone Technology |
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3 | * |
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4 | * |
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5 | * THIS FILE IS PROVIDED TO YOU, THE USER, "AS IS", WITHOUT WARRANTY OF ANY |
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6 | * KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE |
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7 | * IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK |
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8 | * AS TO THE QUALITY AND PERFORMANCE OF ALL CODE IN THIS FILE IS WITH YOU. |
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9 | * |
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10 | * You are hereby granted permission to use, copy, modify, and distribute |
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11 | * this file, provided that this notice, plus the above copyright notice |
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12 | * and disclaimer, appears in all copies. Radstone Technology will provide |
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13 | * no support for this code. |
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14 | * |
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15 | */ |
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16 | |
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17 | #define MIN_YEAR 1996 |
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18 | |
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19 | #include <stdlib.h> |
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20 | #include "bsp.h" |
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21 | #include "cmos.h" |
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22 | #include "../nvram/mk48t18.h" |
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23 | |
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24 | #define Bin2BCD(Value) (((Value / 10) << 4) | (Value % 10)) |
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25 | #define BCD2Bin(BcdValue) ((BcdValue >> 4) * 10 + (BcdValue & 0x0f)) |
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26 | |
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27 | /* |
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28 | * Private types |
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29 | */ |
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30 | typedef |
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31 | void |
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32 | (*PTIMESET) |
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33 | ( |
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34 | rtems_time_of_day *pTOD |
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35 | ); |
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36 | |
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37 | typedef |
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38 | boolean |
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39 | (*PTIMEGET) |
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40 | ( |
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41 | rtems_time_of_day *pTOD |
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42 | ); |
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43 | |
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44 | typedef struct _TIME_ENTRY_TABLE |
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45 | { |
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46 | PTIMESET SetTime; |
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47 | PTIMEGET GetTime; |
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48 | } TIME_ENTRY_TABLE, *PTIME_ENTRY_TABLE; |
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49 | |
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50 | /* |
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51 | * Private routines |
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52 | */ |
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53 | |
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54 | /* |
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55 | * DS1385 specific routines |
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56 | */ |
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57 | static void timeDsSet(rtems_time_of_day *pTOD); |
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58 | static boolean timeDsGet(rtems_time_of_day *pTOD); |
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59 | |
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60 | /* |
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61 | * MK48T18 specific routines |
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62 | */ |
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63 | static void timeMkSet(rtems_time_of_day *pTOD); |
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64 | static boolean timeMkGet(rtems_time_of_day *pTOD); |
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65 | |
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66 | TIME_ENTRY_TABLE timeDsTable = |
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67 | { |
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68 | timeDsSet, |
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69 | timeDsGet |
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70 | }; |
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71 | |
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72 | TIME_ENTRY_TABLE timeMkTable = |
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73 | { |
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74 | timeMkSet, |
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75 | timeMkGet |
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76 | }; |
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77 | |
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78 | /* |
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79 | * Private variables |
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80 | */ |
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81 | static PTIME_ENTRY_TABLE pTimeFunc; |
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82 | |
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83 | /* |
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84 | * Mutual-exclusion semaphore |
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85 | */ |
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86 | static rtems_id semRTC; |
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87 | |
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88 | /* |
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89 | * This only works for the Gregorian calendar - i.e. after 1752 (in the UK) |
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90 | */ |
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91 | uint8_t |
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92 | GregorianDay(rtems_time_of_day *pTOD) |
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93 | { |
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94 | boolean isLeap; |
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95 | unsigned long leapsToDate; |
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96 | unsigned long lastYear; |
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97 | unsigned long day; |
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98 | unsigned long MonthOffset[] = { 0, 31, 59, 90, 120, 151, |
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99 | 181, 212, 243, 273, 304, 334 }; |
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100 | |
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101 | lastYear=pTOD->year-1; |
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102 | |
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103 | /* |
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104 | * Number of leap corrections to apply up to end of last year |
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105 | */ |
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106 | leapsToDate = lastYear/4 - lastYear/100 + lastYear/400; |
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107 | |
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108 | /* |
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109 | * This year is a leap year if it is divisible by 4 except when it is |
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110 | * divisible by 100 unless it is divisible by 400 |
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111 | * |
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112 | * e.g. 1904 was a leap year, 1900 was not, 1996 is, and 2000 will be |
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113 | */ |
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114 | isLeap = (pTOD->year%4==0) && |
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115 | ((pTOD->year%100!=0) || (pTOD->year%400==0)); |
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116 | |
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117 | if(isLeap && (pTOD->month>2)) |
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118 | { |
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119 | day=1; |
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120 | } |
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121 | else |
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122 | { |
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123 | day=0; |
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124 | } |
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125 | |
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126 | day += lastYear*365 + leapsToDate + MonthOffset[pTOD->month-1] + |
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127 | pTOD->day; |
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128 | |
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129 | return((uint8_t)(day%7)); |
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130 | } |
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131 | |
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132 | void |
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133 | DsWriteRawClockRegister ( |
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134 | uint8_t Register, |
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135 | uint8_t Value |
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136 | ) |
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137 | |
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138 | /*++ |
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139 | |
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140 | Routine Description: |
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141 | |
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142 | This routine reads the specified realtime clock register. |
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143 | |
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144 | This function was added to bridge the BCD format of the IBM roms |
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145 | and the binary formate of NT |
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146 | |
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147 | Arguments: |
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148 | |
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149 | Register - Supplies the number of the register whose value is read. |
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150 | |
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151 | Return Value: |
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152 | |
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153 | The value of the register is returned as the function value. |
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154 | |
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155 | --*/ |
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156 | |
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157 | { |
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158 | outport_byte((uint8_t*)RTC_PORT, Register & 0x7f); |
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159 | |
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160 | /* Read the realtime clock register value. */ |
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161 | |
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162 | outport_byte((uint8_t*)(RTC_PORT + 1), Value); |
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163 | return; |
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164 | } |
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165 | |
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166 | uint8_t |
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167 | DsReadRawClockRegister ( |
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168 | uint8_t Register |
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169 | ) |
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170 | |
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171 | /*++ |
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172 | |
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173 | Routine Description: |
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174 | |
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175 | This routine reads the specified realtime clock register. |
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176 | |
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177 | This function was added to bridge the BCD format of the IBM roms |
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178 | and the binary formate of NT |
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179 | |
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180 | Arguments: |
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181 | |
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182 | Register - Supplies the number of the register whose value is read. |
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183 | |
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184 | Return Value: |
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185 | |
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186 | The value of the register is returned as the function value. |
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187 | |
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188 | --*/ |
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189 | |
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190 | { |
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191 | uint8_t ucDataByte; |
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192 | |
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193 | outport_byte((uint8_t*)RTC_PORT, Register & 0x7f); |
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194 | |
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195 | /* Read the realtime clock register value. */ |
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196 | |
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197 | inport_byte((uint8_t*)(RTC_PORT + 1), ucDataByte); |
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198 | return ucDataByte; |
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199 | } |
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200 | |
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201 | void |
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202 | DsWriteClockRegister ( |
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203 | uint8_t Register, |
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204 | uint8_t Value |
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205 | ) |
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206 | |
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207 | /*++ |
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208 | |
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209 | Routine Description: |
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210 | |
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211 | This routine writes the specified value to the specified realtime |
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212 | clock register. |
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213 | |
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214 | Arguments: |
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215 | |
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216 | Register - Supplies the number of the register whose value is written. |
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217 | |
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218 | Value - Supplies the value that is written to the specified register. |
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219 | |
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220 | Return Value: |
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221 | |
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222 | The value of the register is returned as the function value. |
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223 | |
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224 | --*/ |
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225 | |
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226 | { |
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227 | uint8_t BcdValue; |
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228 | |
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229 | BcdValue = Bin2BCD(Value); |
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230 | DsWriteRawClockRegister(Register, BcdValue); |
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231 | return; |
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232 | } |
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233 | |
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234 | uint8_t |
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235 | DsReadClockRegister ( |
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236 | uint8_t Register |
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237 | ) |
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238 | |
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239 | /*++ |
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240 | |
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241 | Routine Description: |
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242 | |
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243 | This routine reads the specified realtime clock register. |
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244 | |
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245 | Arguments: |
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246 | |
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247 | Register - Supplies the number of the register whose value is read. |
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248 | |
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249 | Return Value: |
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250 | |
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251 | The value of the register is returned as the function value. |
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252 | |
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253 | --*/ |
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254 | |
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255 | { |
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256 | uint8_t BcdValue; |
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257 | |
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258 | BcdValue = DsReadRawClockRegister(Register); |
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259 | return BCD2Bin(BcdValue); |
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260 | } |
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261 | |
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262 | void |
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263 | timeDsSet ( |
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264 | rtems_time_of_day *pTOD |
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265 | ) |
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266 | |
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267 | /*++ |
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268 | |
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269 | Routine Description: |
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270 | |
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271 | This routine sets the realtime clock. |
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272 | |
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273 | N.B. This routine assumes that the caller has provided any required |
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274 | synchronization to set the realtime clock information. |
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275 | |
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276 | Arguments: |
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277 | |
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278 | pTOD - Supplies a pointer to a time structure that specifies the |
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279 | realtime clock information. |
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280 | |
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281 | Return Value: |
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282 | |
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283 | If the power to the realtime clock has not failed, then the time |
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284 | values are written to the realtime clock and a value of TRUE is |
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285 | returned. Otherwise, a value of FALSE is returned. |
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286 | |
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287 | --*/ |
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288 | |
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289 | { |
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290 | uint8_t ucDataByte; |
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291 | PCMOS_MAP pCMOS = (PCMOS_MAP)0; |
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292 | |
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293 | /* If the realtime clock battery is still functioning, then write */ |
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294 | /* the realtime clock values, and return a function value of TRUE. */ |
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295 | /* Otherwise, return a function value of FALSE. */ |
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296 | |
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297 | ucDataByte = DsReadRawClockRegister(RTC_CONTROL_REGISTERD); |
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298 | if (ucDataByte&DS1385_REGD_VALID) |
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299 | { |
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300 | /* Set the realtime clock control to set the time. */ |
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301 | |
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302 | ucDataByte = DS1385_REGB_HOURS_FMT | DS1385_REGB_SET_TIME; |
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303 | DsWriteRawClockRegister(RTC_CONTROL_REGISTERB, ucDataByte); |
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304 | |
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305 | /* Write the realtime clock values. */ |
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306 | |
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307 | DsWriteClockRegister(RTC_YEAR, |
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308 | (uint8_t)(pTOD->year%100)); |
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309 | if(pTOD->year>=100) |
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310 | { |
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311 | DsWriteClockRegister((uint8_t) |
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312 | ((unsigned long)&pCMOS->Century), |
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313 | pTOD->year/100); |
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314 | } |
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315 | DsWriteClockRegister(RTC_MONTH, |
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316 | (uint8_t)pTOD->month); |
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317 | DsWriteClockRegister(RTC_DAY_OF_MONTH, |
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318 | (uint8_t)pTOD->day); |
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319 | DsWriteClockRegister(RTC_DAY_OF_WEEK, |
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320 | (uint8_t) |
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321 | (GregorianDay(pTOD) + 1)); |
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322 | DsWriteClockRegister(RTC_HOUR, |
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323 | (uint8_t)pTOD->hour); |
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324 | DsWriteClockRegister(RTC_MINUTE, |
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325 | (uint8_t)pTOD->minute); |
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326 | DsWriteClockRegister(RTC_SECOND, |
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327 | (uint8_t)pTOD->second); |
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328 | |
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329 | /* Set the realtime clock control to update the time. */ |
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330 | |
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331 | ucDataByte &= ~DS1385_REGB_SET_TIME; |
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332 | DsWriteRawClockRegister(RTC_CONTROL_REGISTERB, ucDataByte); |
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333 | return; |
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334 | |
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335 | } |
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336 | else |
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337 | { |
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338 | return; |
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339 | } |
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340 | } |
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341 | |
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342 | boolean |
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343 | timeDsGet ( |
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344 | rtems_time_of_day *pTOD |
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345 | ) |
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346 | |
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347 | /*++ |
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348 | |
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349 | Routine Description: |
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350 | |
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351 | This routine queries the realtime clock. |
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352 | |
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353 | Arguments: |
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354 | |
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355 | pTOD - Supplies a pointer to a time structure that receives |
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356 | the realtime clock information. |
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357 | |
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358 | Return Value: |
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359 | |
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360 | If the power to the realtime clock has not failed, then the time |
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361 | values are read from the realtime clock and a value of TRUE is |
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362 | returned. Otherwise, a value of FALSE is returned. |
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363 | |
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364 | --*/ |
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365 | |
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366 | { |
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367 | uint8_t ucDataByte; |
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368 | PCMOS_MAP pCMOS = (PCMOS_MAP)0; |
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369 | |
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370 | /* If the realtime clock battery is still functioning, then read */ |
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371 | /* the realtime clock values, and return a function value of TRUE. */ |
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372 | /* Otherwise, return a function value of FALSE. */ |
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373 | |
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374 | ucDataByte = DsReadRawClockRegister(RTC_CONTROL_REGISTERD); |
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375 | if(ucDataByte&DS1385_REGD_VALID) |
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376 | { |
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377 | /* Wait until the realtime clock is not being updated. */ |
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378 | |
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379 | do |
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380 | { |
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381 | ucDataByte=DsReadRawClockRegister(RTC_CONTROL_REGISTERA); |
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382 | } while (ucDataByte&DS1385_REGA_UIP); |
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383 | |
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384 | /* Read the realtime clock values. */ |
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385 | |
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386 | pTOD->year=(uint16_t) |
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387 | (DsReadClockRegister( |
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388 | (uint8_t) |
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389 | (unsigned long)&pCMOS->Century) |
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390 | *100 + DsReadClockRegister(RTC_YEAR)); |
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391 | pTOD->month=DsReadClockRegister(RTC_MONTH); |
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392 | pTOD->day=DsReadClockRegister(RTC_DAY_OF_MONTH); |
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393 | pTOD->hour=DsReadClockRegister(RTC_HOUR); |
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394 | pTOD->minute=DsReadClockRegister(RTC_MINUTE); |
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395 | pTOD->second=DsReadClockRegister(RTC_SECOND); |
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396 | return TRUE; |
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397 | } |
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398 | else |
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399 | { |
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400 | return FALSE; |
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401 | } |
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402 | } |
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403 | |
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404 | void |
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405 | timeMkSet ( |
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406 | rtems_time_of_day *pTOD |
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407 | ) |
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408 | |
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409 | /*++ |
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410 | |
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411 | Routine Description: |
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412 | |
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413 | This routine sets the realtime clock. |
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414 | |
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415 | N.B. This routine assumes that the caller has provided any required |
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416 | synchronization to set the realtime clock information. |
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417 | |
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418 | Arguments: |
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419 | |
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420 | pTOD - Supplies a pointer to a time structure that specifies the |
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421 | realtime clock information. |
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422 | |
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423 | Return Value: |
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424 | |
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425 | If the power to the realtime clock has not failed, then the time |
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426 | values are written to the realtime clock and a value of TRUE is |
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427 | returned. Otherwise, a value of FALSE is returned. |
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428 | |
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429 | --*/ |
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430 | |
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431 | { |
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432 | PMK48T18_NVRAM_MAP pNvRAM = MK48T18_BASE; |
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433 | |
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434 | /* |
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435 | * Set the RTC into write mode |
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436 | */ |
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437 | pNvRAM->CMOS.Control|=MK48T18_CTRL_WRITE; |
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438 | EIEIO; |
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439 | |
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440 | /* |
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441 | * Write the realtime clock values. |
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442 | */ |
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443 | |
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444 | pNvRAM->CMOS.Year = (uint8_t)Bin2BCD(pTOD->year%100); |
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445 | if(pTOD->year>=100) |
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446 | { |
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447 | pNvRAM->CMOS.Century=(uint8_t) |
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448 | Bin2BCD(pTOD->year/100); |
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449 | } |
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450 | pNvRAM->CMOS.Month = (uint8_t)Bin2BCD(pTOD->month); |
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451 | pNvRAM->CMOS.Date = (uint8_t)Bin2BCD(pTOD->day); |
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452 | pNvRAM->CMOS.Day = (uint8_t)(GregorianDay(pTOD) + 1); |
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453 | pNvRAM->CMOS.Hour = (uint8_t)Bin2BCD(pTOD->hour); |
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454 | pNvRAM->CMOS.Minute = (uint8_t)Bin2BCD(pTOD->minute); |
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455 | pNvRAM->CMOS.Second = (uint8_t)Bin2BCD(pTOD->second); |
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456 | |
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457 | /* |
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458 | * Set the realtime clock control to update the time. |
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459 | */ |
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460 | |
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461 | EIEIO; |
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462 | pNvRAM->CMOS.Control&=~MK48T18_CTRL_WRITE; |
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463 | } |
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464 | |
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465 | boolean |
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466 | timeMkGet ( |
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467 | rtems_time_of_day *pTOD |
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468 | ) |
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469 | |
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470 | /*++ |
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471 | |
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472 | Routine Description: |
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473 | |
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474 | This routine queries the realtime clock. |
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475 | |
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476 | N.B. This routine is required to provide any synchronization necessary |
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477 | to query the realtime clock information. |
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478 | |
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479 | Arguments: |
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480 | |
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481 | pTOD - Supplies a pointer to a time structure that receives |
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482 | the realtime clock information. |
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483 | |
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484 | Return Value: |
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485 | |
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486 | If the power to the realtime clock has not failed, then the time |
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487 | values are read from the realtime clock and a value of TRUE is |
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488 | returned. Otherwise, a value of FALSE is returned. |
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489 | |
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490 | --*/ |
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491 | |
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492 | { |
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493 | PMK48T18_NVRAM_MAP pNvRAM = MK48T18_BASE; |
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494 | |
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495 | /* |
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496 | * Set the RTC into read mode |
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497 | */ |
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498 | pNvRAM->CMOS.Control|=MK48T18_CTRL_READ; |
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499 | EIEIO; |
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500 | |
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501 | /* |
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502 | * Read the realtime clock values. |
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503 | */ |
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504 | |
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505 | pTOD->year = (uint16_t)(100*BCD2Bin(pNvRAM->CMOS.Century)+ |
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506 | BCD2Bin(pNvRAM->CMOS.Year)); |
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507 | pTOD->month = (uint8_t)BCD2Bin(pNvRAM->CMOS.Month); |
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508 | pTOD->day = (uint8_t)BCD2Bin(pNvRAM->CMOS.Date); |
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509 | pTOD->hour = (uint8_t)BCD2Bin(pNvRAM->CMOS.Hour); |
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510 | pTOD->minute = (uint8_t)BCD2Bin(pNvRAM->CMOS.Minute); |
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511 | pTOD->second = (uint8_t)BCD2Bin(pNvRAM->CMOS.Second); |
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512 | |
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513 | /* |
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514 | * Set the realtime clock control to normal mode. |
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515 | */ |
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516 | EIEIO; |
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517 | pNvRAM->CMOS.Control&=~MK48T18_CTRL_READ; |
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518 | |
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519 | return TRUE; |
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520 | } |
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521 | |
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522 | /* |
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523 | * Set up entry table |
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524 | */ |
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525 | void |
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526 | InitializeRTC(void) |
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527 | { |
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528 | rtems_status_code sc; |
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529 | |
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530 | switch(ucSystemType) |
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531 | { |
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532 | case SYS_TYPE_PPC1: |
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533 | { |
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534 | if(ucBoardRevMaj<5) |
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535 | { |
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536 | pTimeFunc=&timeDsTable; |
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537 | break; |
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538 | } |
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539 | /* |
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540 | * For the 005 and later drop through to the PPC1a support |
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541 | */ |
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542 | } |
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543 | |
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544 | case SYS_TYPE_PPC1a: |
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545 | { |
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546 | pTimeFunc=&timeMkTable; |
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547 | break; |
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548 | } |
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549 | |
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550 | default: |
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551 | { |
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552 | pTimeFunc=&timeDsTable; |
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553 | break; |
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554 | } |
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555 | } |
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556 | |
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557 | /* |
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558 | * Set up mutex semaphore |
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559 | */ |
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560 | sc = rtems_semaphore_create ( |
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561 | rtems_build_name ('R', 'T', 'C', 's'), |
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562 | 1, |
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563 | RTEMS_BINARY_SEMAPHORE | |
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564 | RTEMS_INHERIT_PRIORITY | |
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565 | RTEMS_PRIORITY, |
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566 | RTEMS_NO_PRIORITY, |
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567 | &semRTC); |
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568 | if (sc != RTEMS_SUCCESSFUL) |
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569 | { |
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570 | rtems_fatal_error_occurred (sc); |
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571 | } |
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572 | } |
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573 | |
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574 | void setRealTimeToRTEMS() |
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575 | { |
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576 | rtems_time_of_day rtc_tod; |
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577 | |
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578 | rtems_semaphore_obtain(semRTC, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
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579 | (pTimeFunc->GetTime)(&rtc_tod); |
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580 | rtems_semaphore_release(semRTC); |
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581 | |
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582 | /* |
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583 | * Millenium fix... |
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584 | * |
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585 | * If year is earlier than MIN_YEAR then assume the clock has wrapped from |
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586 | * 1999 to 1900 so advance by a century |
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587 | */ |
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588 | if(rtc_tod.year<MIN_YEAR) |
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589 | { |
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590 | rtc_tod.year+=100; |
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591 | rtems_semaphore_obtain(semRTC, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
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592 | (pTimeFunc->SetTime)(&rtc_tod); |
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593 | rtems_semaphore_release(semRTC); |
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594 | } |
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595 | |
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596 | rtc_tod.ticks=0; |
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597 | |
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598 | rtems_clock_set( &rtc_tod ); |
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599 | } |
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600 | |
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601 | void setRealTimeFromRTEMS() |
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602 | { |
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603 | rtems_time_of_day rtems_tod; |
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604 | |
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605 | rtems_clock_get( RTEMS_CLOCK_GET_TOD, &rtems_tod ); |
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606 | rtems_semaphore_obtain(semRTC, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
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607 | (pTimeFunc->SetTime)(&rtems_tod); |
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608 | rtems_semaphore_release(semRTC); |
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609 | } |
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610 | |
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611 | int checkRealTime() |
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612 | { |
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613 | return 0; |
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614 | } |
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