git.zerfleddert.de Git - proxmark3-svn/blob - armsrc/util.c

   1 //-----------------------------------------------------------------------------
   2 // Utility functions used in many places, not specific to any piece of code.
   3 // Jonathan Westhues, Sept 2005
   4 //-----------------------------------------------------------------------------
   5 #include <proxmark3.h>
   6 #include "apps.h"
   7
   8 void *memcpy(void *dest, const void *src, int len)
   9 {
  10         BYTE *d = dest;
  11         const BYTE *s = src;
  12         while((len--) > 0) {
  13                 *d = *s;
  14                 d++;
  15                 s++;
  16         }
  17         return dest;
  18 }
  19
  20 void *memset(void *dest, int c, int len)
  21 {
  22         BYTE *d = dest;
  23         while((len--) > 0) {
  24                 *d = c;
  25                 d++;
  26         }
  27         return dest;
  28 }
  29
  30 int memcmp(const void *av, const void *bv, int len)
  31 {
  32         const BYTE *a = av;
  33         const BYTE *b = bv;
  34
  35         while((len--) > 0) {
  36                 if(*a != *b) {
  37                         return *a - *b;
  38                 }
  39                 a++;
  40                 b++;
  41         }
  42         return 0;
  43 }
  44
  45 int strlen(char *str)
  46 {
  47         int l = 0;
  48         while(*str) {
  49                 l++;
  50                 str++;
  51         }
  52         return l;
  53 }
  54
  55 char* strncat(char *dest, const char *src, unsigned int n)
  56 {
  57         unsigned int dest_len = strlen(dest);
  58         unsigned int i;
  59
  60         for (i = 0 ; i < n && src[i] != '\0' ; i++)
  61                 dest[dest_len + i] = src[i];
  62         dest[dest_len + i] = '\0';
  63
  64         return dest;
  65 }
  66
  67 void num_to_bytes(uint64_t n, size_t len, byte_t* dest)
  68 {
  69         while (len--) {
  70                 dest[len] = (byte_t) n;
  71                 n >>= 8;
  72         }
  73 }
  74
  75 uint64_t bytes_to_num(byte_t* src, size_t len)
  76 {
  77         uint64_t num = 0;
  78         while (len--)
  79         {
  80                 num = (num << 8) | (*src);
  81                 src++;
  82         }
  83         return num;
  84 }
  85
  86 void LEDsoff()
  87 {
  88         LED_A_OFF();
  89         LED_B_OFF();
  90         LED_C_OFF();
  91         LED_D_OFF();
  92 }
  93
  94 // LEDs: R(C) O(A) G(B) -- R(D) [1, 2, 4 and 8]
  95 void LED(int led, int ms)
  96 {
  97         if (led & LED_RED)
  98                 LED_C_ON();
  99         if (led & LED_ORANGE)
 100                 LED_A_ON();
 101         if (led & LED_GREEN)
 102                 LED_B_ON();
 103         if (led & LED_RED2)
 104                 LED_D_ON();
 105
 106         if (!ms)
 107                 return;
 108
 109         SpinDelay(ms);
 110
 111         if (led & LED_RED)
 112                 LED_C_OFF();
 113         if (led & LED_ORANGE)
 114                 LED_A_OFF();
 115         if (led & LED_GREEN)
 116                 LED_B_OFF();
 117         if (led & LED_RED2)
 118                 LED_D_OFF();
 119 }
 120
 121
 122 // Determine if a button is double clicked, single clicked,
 123 // not clicked, or held down (for ms || 1sec)
 124 // In general, don't use this function unless you expect a
 125 // double click, otherwise it will waste 500ms -- use BUTTON_HELD instead
 126 int BUTTON_CLICKED(int ms)
 127 {
 128         // Up to 500ms in between clicks to mean a double click
 129         int ticks = (48000 * (ms ? ms : 1000)) >> 10;
 130
 131         // If we're not even pressed, forget about it!
 132         if (!BUTTON_PRESS())
 133                 return BUTTON_NO_CLICK;
 134
 135         // Borrow a PWM unit for my real-time clock
 136         AT91C_BASE_PWMC->PWMC_ENA = PWM_CHANNEL(0);
 137         // 48 MHz / 1024 gives 46.875 kHz
 138         AT91C_BASE_PWMC_CH0->PWMC_CMR = PWM_CH_MODE_PRESCALER(10);
 139         AT91C_BASE_PWMC_CH0->PWMC_CDTYR = 0;
 140         AT91C_BASE_PWMC_CH0->PWMC_CPRDR = 0xffff;
 141
 142         WORD start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
 143
 144         int letoff = 0;
 145         for(;;)
 146         {
 147                 WORD now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
 148
 149                 // We haven't let off the button yet
 150                 if (!letoff)
 151                 {
 152                         // We just let it off!
 153                         if (!BUTTON_PRESS())
 154                         {
 155                                 letoff = 1;
 156
 157                                 // reset our timer for 500ms
 158                                 start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
 159                                 ticks = (48000 * (500)) >> 10;
 160                         }
 161
 162                         // Still haven't let it off
 163                         else
 164                                 // Have we held down a full second?
 165                                 if (now == (WORD)(start + ticks))
 166                                         return BUTTON_HOLD;
 167                 }
 168
 169                 // We already let off, did we click again?
 170                 else
 171                         // Sweet, double click!
 172                         if (BUTTON_PRESS())
 173                                 return BUTTON_DOUBLE_CLICK;
 174
 175                         // Have we ran out of time to double click?
 176                         else
 177                                 if (now == (WORD)(start + ticks))
 178                                         // At least we did a single click
 179                                         return BUTTON_SINGLE_CLICK;
 180
 181                 WDT_HIT();
 182         }
 183
 184         // We should never get here
 185         return BUTTON_ERROR;
 186 }
 187
 188 // Determine if a button is held down
 189 int BUTTON_HELD(int ms)
 190 {
 191         // If button is held for one second
 192         int ticks = (48000 * (ms ? ms : 1000)) >> 10;
 193
 194         // If we're not even pressed, forget about it!
 195         if (!BUTTON_PRESS())
 196                 return BUTTON_NO_CLICK;
 197
 198         // Borrow a PWM unit for my real-time clock
 199         AT91C_BASE_PWMC->PWMC_ENA = PWM_CHANNEL(0);
 200         // 48 MHz / 1024 gives 46.875 kHz
 201         AT91C_BASE_PWMC_CH0->PWMC_CMR = PWM_CH_MODE_PRESCALER(10);
 202         AT91C_BASE_PWMC_CH0->PWMC_CDTYR = 0;
 203         AT91C_BASE_PWMC_CH0->PWMC_CPRDR = 0xffff;
 204
 205         WORD start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
 206
 207         for(;;)
 208         {
 209                 WORD now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
 210
 211                 // As soon as our button let go, we didn't hold long enough
 212                 if (!BUTTON_PRESS())
 213                         return BUTTON_SINGLE_CLICK;
 214
 215                 // Have we waited the full second?
 216                 else
 217                         if (now == (WORD)(start + ticks))
 218                                 return BUTTON_HOLD;
 219
 220                 WDT_HIT();
 221         }
 222
 223         // We should never get here
 224         return BUTTON_ERROR;
 225 }
 226
 227 // attempt at high resolution microsecond timer
 228 // beware: timer counts in 21.3uS increments (1024/48Mhz)
 229 void SpinDelayUs(int us)
 230 {
 231         int ticks = (48*us) >> 10;
 232
 233         // Borrow a PWM unit for my real-time clock
 234         AT91C_BASE_PWMC->PWMC_ENA = PWM_CHANNEL(0);
 235         // 48 MHz / 1024 gives 46.875 kHz
 236         AT91C_BASE_PWMC_CH0->PWMC_CMR = PWM_CH_MODE_PRESCALER(10);
 237         AT91C_BASE_PWMC_CH0->PWMC_CDTYR = 0;
 238         AT91C_BASE_PWMC_CH0->PWMC_CPRDR = 0xffff;
 239
 240         WORD start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
 241
 242         for(;;) {
 243                 WORD now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
 244                 if (now == (WORD)(start + ticks))
 245                         return;
 246
 247                 WDT_HIT();
 248         }
 249 }
 250
 251 void SpinDelay(int ms)
 252 {
 253   // convert to uS and call microsecond delay function
 254         SpinDelayUs(ms*1000);
 255 }
 256
 257 /* Similar to FpgaGatherVersion this formats stored version information
 258  * into a string representation. It takes a pointer to the struct version_information,
 259  * verifies the magic properties, then stores a formatted string, prefixed by
 260  * prefix in dst.
 261  */
 262 void FormatVersionInformation(char *dst, int len, const char *prefix, void *version_information)
 263 {
 264         struct version_information *v = (struct version_information*)version_information;
 265         dst[0] = 0;
 266         strncat(dst, prefix, len);
 267         if(v->magic != VERSION_INFORMATION_MAGIC) {
 268                 strncat(dst, "Missing/Invalid version information", len);
 269                 return;
 270         }
 271         if(v->versionversion != 1) {
 272                 strncat(dst, "Version information not understood", len);
 273                 return;
 274         }
 275         if(!v->present) {
 276                 strncat(dst, "Version information not available", len);
 277                 return;
 278         }
 279
 280         strncat(dst, v->svnversion, len);
 281         if(v->clean == 0) {
 282                 strncat(dst, "-unclean", len);
 283         } else if(v->clean == 2) {
 284                 strncat(dst, "-suspect", len);
 285         }
 286
 287         strncat(dst, " ", len);
 288         strncat(dst, v->buildtime, len);
 289 }