FIX: Added @marshmellow42 's fix for ASK/Biphase simulation on deviceside.

[proxmark3-svn] / armsrc / util.c

diff --git a/armsrc/util.c b/armsrc/util.c
index 0558fb947024e2095d3ad57ad566fb88ba4a506b..c00fa0116ce5d3a4664c2e4c7bd57620ad815de3 100644 (file)
--- a/armsrc/util.c
+++ b/armsrc/util.c
@@ -8,10 +8,11 @@
 // Utility functions used in many places, not specific to any piece of code.
 //-----------------------------------------------------------------------------
 
-#include "../include/proxmark3.h"
+#include "proxmark3.h"
 #include "util.h"
 #include "string.h"
 #include "apps.h"
+#include "BigBuf.h"
 
 
 
@@ -34,13 +35,12 @@ void print_result(char *name, uint8_t *buf, size_t len) {
 }
 
 size_t nbytes(size_t nbits) {
-       return (nbits/8)+((nbits%8)>0);
+       return (nbits >> 3)+((nbits % 8) > 0);
 }
 
 uint32_t SwapBits(uint32_t value, int nrbits) {
-       int i;
        uint32_t newvalue = 0;
-       for(i = 0; i < nrbits; i++) {
+       for(int i = 0; i < nrbits; i++) {
                newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
        }
        return newvalue;
@@ -73,6 +73,7 @@ void rol(uint8_t *data, const size_t len){
     }
     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);
@@ -267,15 +268,15 @@ void FormatVersionInformation(char *dst, int len, const char *prefix, void *vers
        dst[0] = 0;
        strncat(dst, prefix, len-1);
        if(v->magic != VERSION_INFORMATION_MAGIC) {
-               strncat(dst, "Missing/Invalid version information", len - strlen(dst) - 1);
+               strncat(dst, "Missing/Invalid version information\n", len - strlen(dst) - 1);
                return;
        }
        if(v->versionversion != 1) {
-               strncat(dst, "Version information not understood", len - strlen(dst) - 1);
+               strncat(dst, "Version information not understood\n", len - strlen(dst) - 1);
                return;
        }
        if(!v->present) {
-               strncat(dst, "Version information not available", len - strlen(dst) - 1);
+               strncat(dst, "Version information not available\n", len - strlen(dst) - 1);
                return;
        }
 
@@ -288,6 +289,7 @@ void FormatVersionInformation(char *dst, int len, const char *prefix, void *vers
 
        strncat(dst, " ", len - strlen(dst) - 1);
        strncat(dst, v->buildtime, len - strlen(dst) - 1);
+       strncat(dst, "\n", len - strlen(dst) - 1);
 }
 
 //  -------------------------------------------------------------------------
@@ -302,11 +304,12 @@ void FormatVersionInformation(char *dst, int len, const char *prefix, void *vers
 
 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
+       // This timer is based on the slow clock. The slow clock frequency is between 22kHz and 40kHz.
+       // We can determine the actual slow clock frequency by looking at the Main Clock Frequency Register.
+    uint16_t mainf = AT91C_BASE_PMC->PMC_MCFR & 0xffff;                // = 16 * main clock frequency (16MHz) / slow clock frequency
+       // set RealTimeCounter divider to count at 1kHz:
+       AT91C_BASE_RTTC->RTTC_RTMR = AT91C_RTTC_RTTRST | ((256000 + (mainf/2)) / mainf);
+       // note: worst case precision is approx 2.5%
 }
 
 /*
@@ -342,7 +345,9 @@ void StartCountUS()
        }
 
 uint32_t RAMFUNC GetCountUS(){
-       return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV / 15) * 10);
+       //return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV / 15) * 10);
+       //  By suggestion from PwPiwi, http://www.proxmark.org/forum/viewtopic.php?pid=17548#p17548
+       return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV * 2) / 3); 
 }
 
 static uint32_t GlobalUsCounter = 0;
@@ -416,16 +421,10 @@ void StartCountSspClk()
        while (AT91C_BASE_TC0->TC_CV < 0xFFF0);
 }
 
-
 uint32_t RAMFUNC GetCountSspClk(){
-       uint32_t tmp_count;
-       tmp_count = (AT91C_BASE_TC2->TC_CV << 16) | AT91C_BASE_TC0->TC_CV;
-       if ((tmp_count & 0x0000ffff) == 0) { //small chance that we may have missed an increment in TC2
+       uint32_t tmp_count = (AT91C_BASE_TC2->TC_CV << 16) | AT91C_BASE_TC0->TC_CV;
+       if ((tmp_count & 0x0000ffff) == 0)  //small chance that we may have missed an increment in TC2
                return (AT91C_BASE_TC2->TC_CV << 16);
-       } 
-       else {
-               return tmp_count;
-       }
+       return tmp_count;
 }
 
-