FIX: since the correctionNeeded logic changed, with PR #87 (https://github.com...

[proxmark3-svn] / armsrc / util.c

diff --git a/armsrc/util.c b/armsrc/util.c
index 00dbdbb83e29f176792ba9e7eb3352ca34faa3ed..6c3c06a3421b48c23171c0061f911262bd759544 100644 (file)
--- a/armsrc/util.c
+++ b/armsrc/util.c
@@ -7,32 +7,104 @@
 //-----------------------------------------------------------------------------
 // Utility functions used in many places, not specific to any piece of code.
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 // Utility functions used in many places, not specific to any piece of code.
 //-----------------------------------------------------------------------------

-
-#include "proxmark3.h"

 #include "util.h"
 #include "util.h"

-#include "string.h"

 
 

-void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
-{
+size_t nbytes(size_t nbits) {
+       return (nbits >> 3)+((nbits % 8) > 0);
+}
+
+uint32_t SwapBits(uint32_t value, int nrbits) {
+       uint32_t newvalue = 0;
+       for(int i = 0; i < nrbits; i++) {
+               newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
+       }
+       return newvalue;
+}
+
+/*
+ ref  http://www.csm.ornl.gov/~dunigan/crc.html
+ Returns the value v with the bottom b [0,32] bits reflected. 
+ Example: reflect(0x3e23L,3) == 0x3e26
+*/
+uint32_t reflect(uint32_t v, int b) {
+       uint32_t t = v;
+       for ( int i = 0; i < b; ++i) {
+               if (t & 1)
+                       v |=  BITMASK((b-1)-i);
+               else
+                       v &= ~BITMASK((b-1)-i);
+               t >>= 1;
+       }
+       return v;
+}
+
+void num_to_bytes(uint64_t n, size_t len, uint8_t* dest) {

        while (len--) {
                dest[len] = (uint8_t) n;
                n >>= 8;
        }
 }
 
        while (len--) {
                dest[len] = (uint8_t) n;
                n >>= 8;
        }
 }
 

-uint64_t bytes_to_num(uint8_t* src, size_t len)
-{
+uint64_t bytes_to_num(uint8_t* src, size_t len) {

        uint64_t num = 0;
        uint64_t num = 0;

-       while (len--)
-       {
+       while (len--) {

                num = (num << 8) | (*src);
                src++;
        }
        return num;
 }
 
                num = (num << 8) | (*src);
                src++;
        }
        return num;
 }
 

-void LEDsoff()
-{
+// RotateLeft - Ultralight, Desfire
+void rol(uint8_t *data, const size_t len) {
+    uint8_t first = data[0];
+    for (size_t i = 0; i < len-1; i++) {
+        data[i] = data[i+1];
+    }
+    data[len-1] = first;
+}
+
+void lsl (uint8_t *data, size_t len) {
+    for (size_t n = 0; n < len - 1; n++) {
+        data[n] = (data[n] << 1) | (data[n+1] >> 7);
+    }
+    data[len - 1] <<= 1;
+}
+
+int32_t le24toh (uint8_t data[3]) {
+    return (data[2] << 16) | (data[1] << 8) | data[0];
+}
+
+//convert hex digit to integer
+uint8_t hex2int(char hexchar){
+    switch(hexchar){
+        case '0': return 0; break;
+        case '1': return 1; break;
+        case '2': return 2; break;
+        case '3': return 3; break;
+        case '4': return 4; break;
+        case '5': return 5; break;
+        case '6': return 6; break;
+        case '7': return 7; break;
+        case '8': return 8; break;
+        case '9': return 9; break;
+        case 'a':
+        case 'A': return 10; break;
+        case 'b':
+               case 'B': return 11; break;
+        case 'c':
+        case 'C': return 12; break;
+        case 'd':
+               case 'D': return 13; break;
+        case 'e':
+        case 'E': return 14; break;
+        case 'f':
+        case 'F': return 15; break;
+        default:
+            return 0;
+    }
+}
+
+void LEDsoff() {

        LED_A_OFF();
        LED_B_OFF();
        LED_C_OFF();
        LED_A_OFF();
        LED_B_OFF();
        LED_C_OFF();


@@ -40,8 +112,7 @@ void LEDsoff()
 }
 
 // LEDs: R(C) O(A) G(B) -- R(D) [1, 2, 4 and 8]
 }
 
 // LEDs: R(C) O(A) G(B) -- R(D) [1, 2, 4 and 8]

-void LED(int led, int ms)
-{
+void LED(int led, int ms) {

        if (led & LED_RED)
                LED_C_ON();
        if (led & LED_ORANGE)
        if (led & LED_RED)
                LED_C_ON();
        if (led & LED_ORANGE)


@@ -66,13 +137,11 @@ void LED(int led, int ms)
                LED_D_OFF();
 }
 
                LED_D_OFF();
 }
 

-

 // Determine if a button is double clicked, single clicked,
 // not clicked, or held down (for ms || 1sec)
 // In general, don't use this function unless you expect a
 // double click, otherwise it will waste 500ms -- use BUTTON_HELD instead
 // Determine if a button is double clicked, single clicked,
 // not clicked, or held down (for ms || 1sec)
 // In general, don't use this function unless you expect a
 // double click, otherwise it will waste 500ms -- use BUTTON_HELD instead

-int BUTTON_CLICKED(int ms)
-{
+int BUTTON_CLICKED(int ms) {

        // Up to 500ms in between clicks to mean a double click
        int ticks = (48000 * (ms ? ms : 1000)) >> 10;
 
        // Up to 500ms in between clicks to mean a double click
        int ticks = (48000 * (ms ? ms : 1000)) >> 10;
 


@@ -134,8 +203,7 @@ int BUTTON_CLICKED(int ms)
 }
 
 // Determine if a button is held down
 }
 
 // Determine if a button is held down

-int BUTTON_HELD(int ms)
-{
+int BUTTON_HELD(int ms) {

        // If button is held for one second
        int ticks = (48000 * (ms ? ms : 1000)) >> 10;
 
        // If button is held for one second
        int ticks = (48000 * (ms ? ms : 1000)) >> 10;
 


@@ -172,132 +240,36 @@ int BUTTON_HELD(int ms)
        return BUTTON_ERROR;
 }
 
        return BUTTON_ERROR;
 }
 

-// attempt at high resolution microsecond timer
-// beware: timer counts in 21.3uS increments (1024/48Mhz)
-void SpinDelayUs(int us)
-{
-       int ticks = (48*us) >> 10;
-
-       // Borrow a PWM unit for my real-time clock
-       AT91C_BASE_PWMC->PWMC_ENA = PWM_CHANNEL(0);
-       // 48 MHz / 1024 gives 46.875 kHz
-       AT91C_BASE_PWMC_CH0->PWMC_CMR = PWM_CH_MODE_PRESCALER(10);
-       AT91C_BASE_PWMC_CH0->PWMC_CDTYR = 0;
-       AT91C_BASE_PWMC_CH0->PWMC_CPRDR = 0xffff;
-
-       uint16_t start = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
-
-       for(;;) {
-               uint16_t now = AT91C_BASE_PWMC_CH0->PWMC_CCNTR;
-               if (now == (uint16_t)(start + ticks))
-                       return;
-
-               WDT_HIT();
-       }
-}
-
-void SpinDelay(int ms)
-{
-  // convert to uS and call microsecond delay function
-       SpinDelayUs(ms*1000);
-}
-

 /* Similar to FpgaGatherVersion this formats stored version information
  * into a string representation. It takes a pointer to the struct version_information,
  * verifies the magic properties, then stores a formatted string, prefixed by
  * prefix in dst.
  */
 /* Similar to FpgaGatherVersion this formats stored version information
  * into a string representation. It takes a pointer to the struct version_information,
  * verifies the magic properties, then stores a formatted string, prefixed by
  * prefix in dst.
  */

-void FormatVersionInformation(char *dst, int len, const char *prefix, void *version_information)
-{
+void FormatVersionInformation(char *dst, int len, const char *prefix, void *version_information) {

        struct version_information *v = (struct version_information*)version_information;
        dst[0] = 0;
        struct version_information *v = (struct version_information*)version_information;
        dst[0] = 0;

-       strncat(dst, prefix, len);
+       strncat(dst, prefix, len-1);

        if(v->magic != VERSION_INFORMATION_MAGIC) {
        if(v->magic != VERSION_INFORMATION_MAGIC) {

-               strncat(dst, "Missing/Invalid version information", len);
+               strncat(dst, "Missing/Invalid version information\n", len - strlen(dst) - 1);

                return;
        }
        if(v->versionversion != 1) {
                return;
        }
        if(v->versionversion != 1) {

-               strncat(dst, "Version information not understood", len);
+               strncat(dst, "Version information not understood\n", len - strlen(dst) - 1);

                return;
        }
        if(!v->present) {
                return;
        }
        if(!v->present) {

-               strncat(dst, "Version information not available", len);
+               strncat(dst, "Version information not available\n", len - strlen(dst) - 1);

                return;
        }
 
                return;
        }
 

-       strncat(dst, v->svnversion, len);
+       strncat(dst, v->gitversion, len - strlen(dst) - 1);

        if(v->clean == 0) {
        if(v->clean == 0) {

-               strncat(dst, "-unclean", len);
+               strncat(dst, "-unclean", len - strlen(dst) - 1);

        } else if(v->clean == 2) {
        } else if(v->clean == 2) {

-               strncat(dst, "-suspect", len);
+               strncat(dst, "-suspect", len - strlen(dst) - 1);

        }
 
        }
 

-       strncat(dst, " ", len);
-       strncat(dst, v->buildtime, len);
-}
-
-//  -------------------------------------------------------------------------
-//  timer lib
-//  -------------------------------------------------------------------------
-//  test procedure:
-//
-//     ti = GetTickCount();
-//     SpinDelay(1000);
-//     ti = GetTickCount() - ti;
-//     Dbprintf("timer(1s): %d t=%d", ti, GetTickCount());
-
-void StartTickCount()
-{
-//  must be 0x40, but on my cpu - included divider is optimal
-//  0x20 - 1 ms / bit 
-//  0x40 - 2 ms / bit
-
-       AT91C_BASE_RTTC->RTTC_RTMR = AT91C_RTTC_RTTRST + 0x001D; // was 0x003B
-}
-
-/*
-* Get the current count.
-*/
-uint32_t RAMFUNC GetTickCount(){
-       return AT91C_BASE_RTTC->RTTC_RTVR;// was * 2;
-}
-
-//  -------------------------------------------------------------------------
-//  microseconds timer 
-//  -------------------------------------------------------------------------
-void StartCountUS()
-{
-       AT91C_BASE_PMC->PMC_PCER |= (0x1 << 12) | (0x1 << 13) | (0x1 << 14);
-//     AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC1XC1S_TIOA0;
-       AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC0XC0S_NONE | AT91C_TCB_TC1XC1S_TIOA0 | AT91C_TCB_TC2XC2S_NONE;
-
-       // fast clock
-       AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS; // timer disable
-       AT91C_BASE_TC0->TC_CMR = AT91C_TC_CLKS_TIMER_DIV3_CLOCK | // MCK(48MHz)/32 -- tick=1.5mks
-                                                                                                               AT91C_TC_WAVE | AT91C_TC_WAVESEL_UP_AUTO | AT91C_TC_ACPA_CLEAR |
-                                                                                                               AT91C_TC_ACPC_SET | AT91C_TC_ASWTRG_SET;
-       AT91C_BASE_TC0->TC_RA = 1;
-       AT91C_BASE_TC0->TC_RC = 0xBFFF + 1; // 0xC000
-       
-       AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKDIS; // timer disable  
-       AT91C_BASE_TC1->TC_CMR = AT91C_TC_CLKS_XC1; // from timer 0
-
-       AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN;
-       AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKEN;
-       AT91C_BASE_TCB->TCB_BCR = 1;
+       strncat(dst, " ", len - strlen(dst) - 1);
+       strncat(dst, v->buildtime, len - strlen(dst) - 1);
+       strncat(dst, "\n", len - strlen(dst) - 1);

 }
 }

-
-uint32_t RAMFUNC GetCountUS(){
-       return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV / 15) * 10);
-}
-
-static uint32_t GlobalUsCounter = 0;
-
-uint32_t RAMFUNC GetDeltaCountUS(){
-       uint32_t g_cnt = GetCountUS();
-       uint32_t g_res = g_cnt - GlobalUsCounter;
-       GlobalUsCounter = g_cnt;
-       return g_res;
-}
-
-