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

   1 //-----------------------------------------------------------------------------
   2 // Jonathan Westhues, Sept 2005
   3 //
   4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   5 // at your option, any later version. See the LICENSE.txt file for the text of
   6 // the license.
   7 //-----------------------------------------------------------------------------
   8 // Utility functions used in many places, not specific to any piece of code.
   9 //-----------------------------------------------------------------------------
  10
  11 #include "proxmark3.h"
  12 #include "util.h"
  13 #include "string.h"
  14
  15 uint32_t SwapBits(uint32_t value, int nrbits) {
  16         int i;
  17         uint32_t newvalue = 0;
  18         for(i = 0; i < nrbits; i++) {
  19                 newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
  20         }
  21         return newvalue;
  22 }
  23
  24 void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
  25 {
  26         while (len--) {
  27                 dest[len] = (uint8_t) n;
  28                 n >>= 8;
  29         }
  30 }
  31
  32 uint64_t bytes_to_num(uint8_t* src, size_t len)
  33 {
  34         uint64_t num = 0;
  35         while (len--)
  36         {
  37                 num = (num << 8) | (*src);
  38                 src++;
  39         }
  40         return num;
  41 }
  42
  43 void LEDsoff()
  44 {
  45         LED_A_OFF();
  46         LED_B_OFF();
  47         LED_C_OFF();
  48         LED_D_OFF();
  49 }
  50
  51 // LEDs: R(C) O(A) G(B) -- R(D) [1, 2, 4 and 8]
  52 void LED(int led, int ms)
  53 {
  54         if (led & LED_RED)
  55                 LED_C_ON();
  56         if (led & LED_ORANGE)
  57                 LED_A_ON();
  58         if (led & LED_GREEN)
  59                 LED_B_ON();
  60         if (led & LED_RED2)
  61                 LED_D_ON();
  62
  63         if (!ms)
  64                 return;
  65
  66         SpinDelay(ms);
  67
  68         if (led & LED_RED)
  69                 LED_C_OFF();
  70         if (led & LED_ORANGE)
  71                 LED_A_OFF();
  72         if (led & LED_GREEN)
  73                 LED_B_OFF();
  74         if (led & LED_RED2)
  75                 LED_D_OFF();
  76 }
  77
  78
  79 // Determine if a button is double clicked, single clicked,
  80 // not clicked, or held down (for ms || 1sec)
  81 // In general, don't use this function unless you expect a
  82 // double click, otherwise it will waste 500ms -- use BUTTON_HELD instead
  83 int BUTTON_CLICKED(int ms)
  84 {
  85         // Up to 500ms in between clicks to mean a double click
  86         int ticks = (48000 * (ms ? ms : 1000)) >> 10;
  87
  88         // If we're not even pressed, forget about it!
  89         if (!BUTTON_PRESS())
  90                 return BUTTON_NO_CLICK;
  91
  92         // Borrow a PWM unit for my real-time clock
  93         AT91C_BASE_PWMC->PWMC_ENA = PWM_CHANNEL(0);
  94         // 48 MHz / 1024 gives 46.875 kHz
  95         AT91C_BASE_PWMC_CH0->PWMC_CMR = PWM_CH_MODE_PRESCALER(10);
  96         AT91C_BASE_PWMC_CH0->PWMC_CDTYR = 0;
  97         AT91C_BASE_PWMC_CH0->PWMC_CPRDR = 0xffff;
  98
  99         uint16_t start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
 100
 101         int letoff = 0;
 102         for(;;)
 103         {
 104                 uint16_t now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
 105
 106                 // We haven't let off the button yet
 107                 if (!letoff)
 108                 {
 109                         // We just let it off!
 110                         if (!BUTTON_PRESS())
 111                         {
 112                                 letoff = 1;
 113
 114                                 // reset our timer for 500ms
 115                                 start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
 116                                 ticks = (48000 * (500)) >> 10;
 117                         }
 118
 119                         // Still haven't let it off
 120                         else
 121                                 // Have we held down a full second?
 122                                 if (now == (uint16_t)(start + ticks))
 123                                         return BUTTON_HOLD;
 124                 }
 125
 126                 // We already let off, did we click again?
 127                 else
 128                         // Sweet, double click!
 129                         if (BUTTON_PRESS())
 130                                 return BUTTON_DOUBLE_CLICK;
 131
 132                         // Have we ran out of time to double click?
 133                         else
 134                                 if (now == (uint16_t)(start + ticks))
 135                                         // At least we did a single click
 136                                         return BUTTON_SINGLE_CLICK;
 137
 138                 WDT_HIT();
 139         }
 140
 141         // We should never get here
 142         return BUTTON_ERROR;
 143 }
 144
 145 // Determine if a button is held down
 146 int BUTTON_HELD(int ms)
 147 {
 148         // If button is held for one second
 149         int ticks = (48000 * (ms ? ms : 1000)) >> 10;
 150
 151         // If we're not even pressed, forget about it!
 152         if (!BUTTON_PRESS())
 153                 return BUTTON_NO_CLICK;
 154
 155         // Borrow a PWM unit for my real-time clock
 156         AT91C_BASE_PWMC->PWMC_ENA = PWM_CHANNEL(0);
 157         // 48 MHz / 1024 gives 46.875 kHz
 158         AT91C_BASE_PWMC_CH0->PWMC_CMR = PWM_CH_MODE_PRESCALER(10);
 159         AT91C_BASE_PWMC_CH0->PWMC_CDTYR = 0;
 160         AT91C_BASE_PWMC_CH0->PWMC_CPRDR = 0xffff;
 161
 162         uint16_t start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
 163
 164         for(;;)
 165         {
 166                 uint16_t now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
 167
 168                 // As soon as our button let go, we didn't hold long enough
 169                 if (!BUTTON_PRESS())
 170                         return BUTTON_SINGLE_CLICK;
 171
 172                 // Have we waited the full second?
 173                 else
 174                         if (now == (uint16_t)(start + ticks))
 175                                 return BUTTON_HOLD;
 176
 177                 WDT_HIT();
 178         }
 179
 180         // We should never get here
 181         return BUTTON_ERROR;
 182 }
 183
 184 // attempt at high resolution microsecond timer
 185 // beware: timer counts in 21.3uS increments (1024/48Mhz)
 186 void SpinDelayUs(int us)
 187 {
 188         int ticks = (48*us) >> 10;
 189
 190         // Borrow a PWM unit for my real-time clock
 191         AT91C_BASE_PWMC->PWMC_ENA = PWM_CHANNEL(0);
 192         // 48 MHz / 1024 gives 46.875 kHz
 193         AT91C_BASE_PWMC_CH0->PWMC_CMR = PWM_CH_MODE_PRESCALER(10);
 194         AT91C_BASE_PWMC_CH0->PWMC_CDTYR = 0;
 195         AT91C_BASE_PWMC_CH0->PWMC_CPRDR = 0xffff;
 196
 197         uint16_t start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
 198
 199         for(;;) {
 200                 uint16_t now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
 201                 if (now == (uint16_t)(start + ticks))
 202                         return;
 203
 204                 WDT_HIT();
 205         }
 206 }
 207
 208 void SpinDelay(int ms)
 209 {
 210   // convert to uS and call microsecond delay function
 211         SpinDelayUs(ms*1000);
 212 }
 213
 214 /* Similar to FpgaGatherVersion this formats stored version information
 215  * into a string representation. It takes a pointer to the struct version_information,
 216  * verifies the magic properties, then stores a formatted string, prefixed by
 217  * prefix in dst.
 218  */
 219 void FormatVersionInformation(char *dst, int len, const char *prefix, void *version_information)
 220 {
 221         struct version_information *v = (struct version_information*)version_information;
 222         dst[0] = 0;
 223         strncat(dst, prefix, len);
 224         if(v->magic != VERSION_INFORMATION_MAGIC) {
 225                 strncat(dst, "Missing/Invalid version information", len);
 226                 return;
 227         }
 228         if(v->versionversion != 1) {
 229                 strncat(dst, "Version information not understood", len);
 230                 return;
 231         }
 232         if(!v->present) {
 233                 strncat(dst, "Version information not available", len);
 234                 return;
 235         }
 236
 237         strncat(dst, v->svnversion, len);
 238         if(v->clean == 0) {
 239                 strncat(dst, "-unclean", len);
 240         } else if(v->clean == 2) {
 241                 strncat(dst, "-suspect", len);
 242         }
 243
 244         strncat(dst, " ", len);
 245         strncat(dst, v->buildtime, len);
 246 }
 247
 248 //  -------------------------------------------------------------------------
 249 //  timer lib
 250 //  -------------------------------------------------------------------------
 251 //  test procedure:
 252 //
 253 //      ti = GetTickCount();
 254 //      SpinDelay(1000);
 255 //      ti = GetTickCount() - ti;
 256 //      Dbprintf("timer(1s): %d t=%d", ti, GetTickCount());
 257
 258 void StartTickCount()
 259 {
 260 //  must be 0x40, but on my cpu - included divider is optimal
 261 //  0x20 - 1 ms / bit
 262 //  0x40 - 2 ms / bit
 263
 264         AT91C_BASE_RTTC->RTTC_RTMR = AT91C_RTTC_RTTRST + 0x001D; // was 0x003B
 265 }
 266
 267 /*
 268 * Get the current count.
 269 */
 270 uint32_t RAMFUNC GetTickCount(){
 271         return AT91C_BASE_RTTC->RTTC_RTVR;// was * 2;
 272 }
 273
 274 //  -------------------------------------------------------------------------
 275 //  microseconds timer
 276 //  -------------------------------------------------------------------------
 277 void StartCountUS()
 278 {
 279         AT91C_BASE_PMC->PMC_PCER |= (0x1 << 12) | (0x1 << 13) | (0x1 << 14);
 280 //      AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC1XC1S_TIOA0;
 281         AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC0XC0S_NONE | AT91C_TCB_TC1XC1S_TIOA0 | AT91C_TCB_TC2XC2S_NONE;
 282
 283         // fast clock
 284         AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS; // timer disable
 285         AT91C_BASE_TC0->TC_CMR = AT91C_TC_CLKS_TIMER_DIV3_CLOCK | // MCK(48MHz)/32 -- tick=1.5mks
 286                                                                                                                 AT91C_TC_WAVE | AT91C_TC_WAVESEL_UP_AUTO | AT91C_TC_ACPA_CLEAR |
 287                                                                                                                 AT91C_TC_ACPC_SET | AT91C_TC_ASWTRG_SET;
 288         AT91C_BASE_TC0->TC_RA = 1;
 289         AT91C_BASE_TC0->TC_RC = 0xBFFF + 1; // 0xC000
 290
 291         AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS; // timer disable
 292         AT91C_BASE_TC1->TC_CMR = AT91C_TC_CLKS_XC1; // from timer 0
 293
 294         AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN;
 295         AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKEN;
 296         AT91C_BASE_TCB->TCB_BCR = 1;
 297 }
 298
 299 uint32_t RAMFUNC GetCountUS(){
 300         return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV / 15) * 10);
 301 }
 302
 303 static uint32_t GlobalUsCounter = 0;
 304
 305 uint32_t RAMFUNC GetDeltaCountUS(){
 306         uint32_t g_cnt = GetCountUS();
 307         uint32_t g_res = g_cnt - GlobalUsCounter;
 308         GlobalUsCounter = g_cnt;
 309         return g_res;
 310 }
 311
 312