Mercurial > ~darius > hgwebdir.cgi > stm32temp

annotate syscalls.c @ 24:1e2fa7396f98

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Reduce prescaler to 2, the flash is capable of 25MHz reads (although the touch screen is limited to ~2.5MHz)
author Daniel O'Connor <darius@dons.net.au>
date Sat, 17 Nov 2012 12:17:58 +1030
parents 2bce4dbf52b8
children 435c6330896c
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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>
0
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15
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16 #include "comm.h"
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17 #include "stm32f10x.h" /* for _get_PSP() from core_cm3.h*/
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18
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19 #undef errno
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20 extern int errno;
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21
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22 int
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23 _kill(int pid, int sig) {
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24 pid = pid; sig = sig; /* avoid warnings */
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25 errno = EINVAL;
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26 return -1;
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27 }
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28
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29 void
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30 _exit(int status) {
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31 printf("_exit called with parameter %d\r\n", status);
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32 __disable_irq();
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33 while(1)
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34 ;
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35 }
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36
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37 int
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38 _getpid(void) {
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39 return 1;
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40 }
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41
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42 extern char _end; /* Defined by the linker */
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43 static char *heap_end;
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44
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45 char *
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46 get_heap_end(void) {
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47 return (char*) heap_end;
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48 }
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49
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50 char *
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51 get_stack_top(void) {
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52 /* Use MSP (vs PSP) - the processor is in Thread mode out of reset */
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53 return (char*) __get_MSP();
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54 }
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55
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56 caddr_t
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57 _sbrk(int incr) {
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58 char *prev_heap_end;
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59
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60 if (heap_end == 0) {
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61 heap_end = &_end;
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62 }
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63 prev_heap_end = heap_end;
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64
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65 if (heap_end + incr > get_stack_top()) {
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66 printf("Heap and stack collision\r\n");
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67 abort();
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68 }
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69
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70 heap_end += incr;
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71 return (caddr_t) prev_heap_end;
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72 }
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73
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74 int
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75 _close(int file) {
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76 file = file; /* avoid warning */
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77 return -1;
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78 }
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79
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80 int
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81 _fstat(int file, struct stat *st) {
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82 file = file; /* avoid warning */
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83 st->st_mode = S_IFCHR;
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84 return 0;
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85 }
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86
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87 int
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88 _isatty(int file) {
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89 file = file; /* avoid warning */
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90 return 1;
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91 }
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92
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93 int
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94 _lseek(int file, int ptr, int dir) {
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95 file = file; /* avoid warning */
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96 ptr = ptr; /* avoid warning */
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97 dir = dir; /* avoid warning */
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98 return 0;
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99 }
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100
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101 int
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102 _read(int file, char *ptr, int len) {
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103 file = file; /* avoid warning */
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104 ptr = ptr; /* avoid warning */
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105 len = len; /* avoid warning */
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106 return 0;
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107 }
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108
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109 int
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110 _write(int file, char *ptr, int len) {
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111 int todo;
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112
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113 file = file; /* avoid warning */
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114 for (todo = 0; todo < len; todo++) {
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115 comm_put(*ptr++);
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116 }
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117 return len;
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118 }
3
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119
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120 int
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121 _gettimeofday_r(struct _reent *reent __attribute__((unused)), struct timeval *tp, void *tzp __attribute__((unused))) {
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122 tp->tv_sec = RTC_GetCounter();
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123 tp->tv_usec = 0;
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124
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125 return 0;
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126 }
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127
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128 int
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129 settimeofday(const struct timeval *tp, const struct timezone *tzp __attribute__((unused))) {
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130 RTC_SetCounter(tp->tv_sec);
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131
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132 return 0;
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133 }
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134
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135 clock_t
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136 _clock (void) {
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137 return RTC_GetCounter();
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138 }
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139
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140 void
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141 __tz_lock (void) {
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142 }
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143
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144
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145 void
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146 __tz_unlock (void) {
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147 }
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148
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149 static __tzinfo_type tzinfo = {1, 0,
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150 { {'J', 0, 0, 0, 0, (time_t)0, 0L },
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151 {'J', 0, 0, 0, 0, (time_t)0, 0L }
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152 }
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153 };
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154
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155 __tzinfo_type *
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156 __gettzinfo (void) {
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157 return &tzinfo;
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158 }
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159
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160 /* Stub, required for strftime?! */
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161 int
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162 _open(const char *name __attribute__((unused)), int mode __attribute__((unused)), ...) {
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163 return -1;
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164 }