Mercurial > ~darius > hgwebdir.cgi > stm32temp
annotate syscalls.c @ 76:f1c9a51e368a
Add EEPROM emulation from AN2594.
Fix emulated EEPROM size on large parts.
author | Daniel O'Connor <darius@dons.net.au> |
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date | Mon, 22 Apr 2013 23:17:40 +0930 |
parents | 0e7d687a2322 |
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1 /* |
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2 * syscalls.c |
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3 * |
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4 * Created on: 03.12.2009 |
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5 * Author: Martin Thomas, 3BSD license |
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6 */ |
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7 |
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8 #include <stdio.h> |
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9 #include <reent.h> |
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10 #include <errno.h> |
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11 #include <stdlib.h> /* abort */ |
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12 #include <sys/types.h> |
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13 #include <sys/stat.h> |
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14 #include <sys/time.h> |
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15 |
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16 #include "comm.h" |
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17 #include "rtc.h" |
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18 #include "stm32f10x.h" /* for _get_PSP() from core_cm3.h*/ |
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19 |
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20 int * |
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21 __errno(void) { |
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22 static int _errno; |
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23 |
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24 return(&errno); |
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25 } |
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26 |
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27 int |
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28 _kill(int pid, int sig) { |
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29 pid = pid; sig = sig; /* avoid warnings */ |
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30 errno = EINVAL; |
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31 return -1; |
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32 } |
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33 |
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34 void |
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35 _exit(int status) { |
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36 printf("_exit called with parameter %d\r\n", status); |
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37 __disable_irq(); |
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38 while(1) |
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39 ; |
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40 } |
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41 |
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42 int |
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43 _getpid(void) { |
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44 return 1; |
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45 } |
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46 |
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47 extern char _end; /* Defined by the linker */ |
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48 static char *heap_end; |
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49 |
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50 char * |
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51 get_heap_end(void) { |
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52 return (char*) heap_end; |
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53 } |
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54 |
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55 char * |
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56 get_stack_top(void) { |
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57 /* Use MSP (vs PSP) - the processor is in Thread mode out of reset */ |
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58 return (char*) __get_MSP(); |
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59 } |
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60 |
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61 caddr_t |
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62 _sbrk(int incr) { |
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63 char *prev_heap_end; |
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64 |
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65 if (heap_end == 0) { |
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66 heap_end = &_end; |
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67 } |
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68 prev_heap_end = heap_end; |
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69 |
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70 if (heap_end + incr > get_stack_top()) { |
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71 printf("Heap and stack collision\r\n"); |
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72 abort(); |
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73 } |
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74 |
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75 heap_end += incr; |
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76 return (caddr_t) prev_heap_end; |
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77 } |
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78 |
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79 int |
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80 _close(int file) { |
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81 file = file; /* avoid warning */ |
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82 return -1; |
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83 } |
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84 |
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85 int |
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86 _fstat(int file, struct stat *st) { |
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87 file = file; /* avoid warning */ |
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88 st->st_mode = S_IFCHR; |
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89 return 0; |
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90 } |
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91 |
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92 int |
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93 _isatty(int file) { |
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94 file = file; /* avoid warning */ |
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95 return 1; |
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96 } |
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97 |
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98 int |
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99 _lseek(int file, int ptr, int dir) { |
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100 file = file; /* avoid warning */ |
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101 ptr = ptr; /* avoid warning */ |
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102 dir = dir; /* avoid warning */ |
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103 return 0; |
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104 } |
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105 |
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106 int |
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107 _read(int file, char *ptr, int len) { |
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108 file = file; /* avoid warning */ |
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109 ptr = ptr; /* avoid warning */ |
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110 len = len; /* avoid warning */ |
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111 return 0; |
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112 } |
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113 |
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114 int |
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115 _write(int file, char *ptr, int len) { |
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116 int todo; |
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117 |
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118 for (todo = 0; todo < len; todo++) { |
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119 if (file == 1 || file == 2) |
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120 if (*ptr == '\n') |
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121 comm_put('\r'); |
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122 comm_put(*ptr); |
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123 ptr++; |
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124 } |
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125 return len; |
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126 } |
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127 |
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128 int |
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129 _gettimeofday_r(struct _reent *reent __attribute__((unused)), struct timeval *tp, void *tzp __attribute__((unused))) { |
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130 tp->tv_sec = RTC_GetCounter(); |
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131 tp->tv_usec = RTC_PS2USEC(RTC_GetDivider()); |
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132 |
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133 return 0; |
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134 } |
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135 |
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136 int |
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137 settimeofday(const struct timeval *tp, const struct timezone *tzp __attribute__((unused))) { |
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138 RTC_SetCounter(tp->tv_sec); |
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139 |
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140 return 0; |
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141 } |
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142 |
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143 clock_t |
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144 _clock (void) { |
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145 return RTC_GetCounter(); |
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146 } |
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147 |
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148 void |
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149 __tz_lock (void) { |
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150 } |
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151 |
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152 |
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153 void |
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154 __tz_unlock (void) { |
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155 } |
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156 |
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157 /* Set tzinfo directly so we don't need tzset() which requires getenv() */ |
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158 #ifdef USE_UTC |
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159 static __tzinfo_type tzinfo = {1, 0, |
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160 { {'J', 0, 0, 0, 0, (time_t)0, 0L }, |
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161 {'J', 0, 0, 0, 0, (time_t)0, 0L } |
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162 } |
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163 }; |
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164 #else |
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165 /* ACST (south) |
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166 * Switch from DST 3am 1st Sunday of April: -9.5 hours to UTC |
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167 * Switch to DST 2am 1st Sunday October: -10.5 hours to UTC |
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168 * |
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169 * Copied from http://www.sourceware.org/ml/newlib/2008/msg00311.html |
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170 */ |
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171 static __tzinfo_type tzinfo = {0, 0, { |
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172 {'M', 4, 5, 0, 10800, (time_t)0, -34200L }, |
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173 {'M', 10, 5, 0, 7200, (time_t)0, -37800L } |
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174 } |
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175 }; |
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176 #endif |
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177 |
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178 __tzinfo_type * |
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179 __gettzinfo (void) { |
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180 return &tzinfo; |
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181 } |
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182 |
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183 /* Stub, required for strftime?! */ |
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184 int |
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185 _open(const char *name __attribute__((unused)), int mode __attribute__((unused)), ...) { |
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186 return -1; |
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187 } |