CHG: testing a prng_successor_one method

[proxmark3-svn] / armsrc / util.c

diff --git a/armsrc/util.c b/armsrc/util.c
index 1dd8dc7544fe1cb2989548692f8449f19b6ca621..c00fa0116ce5d3a4664c2e4c7bd57620ad815de3 100644 (file)
--- a/armsrc/util.c
+++ b/armsrc/util.c
@@ -39,9 +39,8 @@ size_t nbytes(size_t nbits) {
 }
 
 uint32_t SwapBits(uint32_t value, int nrbits) {
 }
 
 uint32_t SwapBits(uint32_t value, int nrbits) {

-       int i;

        uint32_t newvalue = 0;
        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;
                newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
        }
        return newvalue;


@@ -74,6 +73,7 @@ void rol(uint8_t *data, const size_t len){
     }
     data[len-1] = first;
 }
     }
     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);
 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);


@@ -345,7 +345,9 @@ void StartCountUS()
        }
 
 uint32_t RAMFUNC GetCountUS(){
        }
 
 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;
 }
 
 static uint32_t GlobalUsCounter = 0;


@@ -419,15 +421,10 @@ void StartCountSspClk()
        while (AT91C_BASE_TC0->TC_CV < 0xFFF0);
 }
 
        while (AT91C_BASE_TC0->TC_CV < 0xFFF0);
 }
 

-

 uint32_t RAMFUNC GetCountSspClk(){
 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);
                return (AT91C_BASE_TC2->TC_CV << 16);

-       } 
-       else {
-               return tmp_count;
-       }
+       return tmp_count;

 }
 
 }