Update README.md

[proxmark3-svn] / armsrc / util.c

diff --git a/armsrc/util.c b/armsrc/util.c
index 4e74b88dd2eeaa20470c8e3b60c7150bdb188f5c..120e7b44cb19de4f94ec23d64244fc35ddf547cc 100644 (file)
--- a/armsrc/util.c
+++ b/armsrc/util.c
@@ -14,24 +14,26 @@
 #include "apps.h"
 #include "BigBuf.h"
 
-
-
 void print_result(char *name, uint8_t *buf, size_t len) {
-   uint8_t *p = buf;
+       uint8_t *p = buf;
 
-   if ( len % 16 == 0 ) {
-          for(; p-buf < len; p += 16)
-       Dbprintf("[%s:%d/%d] %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
+       if ( len % 16 == 0 ) {
+               for(; p-buf < len; p += 16)
+                       Dbprintf("[%s:%d/%d] %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
                                name,
                                p-buf,
                                len,
                                p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]
-          );
-   }
-   else {
-   for(; p-buf < len; p += 8)
-       Dbprintf("[%s:%d/%d] %02x %02x %02x %02x %02x %02x %02x %02x", name, p-buf, len, p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
-   }
+                       );
+       }
+       else {
+               for(; p-buf < len; p += 8)
+                       Dbprintf("[%s:%d/%d] %02x %02x %02x %02x %02x %02x %02x %02x",
+                               name,
+                               p-buf,
+                               len,
+                               p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
+       }
 }
 
 size_t nbytes(size_t nbits) {
@@ -46,19 +48,16 @@ uint32_t SwapBits(uint32_t value, int nrbits) {
        return newvalue;
 }
 
-void num_to_bytes(uint64_t n, size_t len, uint8_t* dest)
-{
+void num_to_bytes(uint64_t n, size_t len, uint8_t* dest) {
        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;
-       while (len--)
-       {
+       while (len--) {
                num = (num << 8) | (*src);
                src++;
        }
@@ -66,7 +65,7 @@ uint64_t bytes_to_num(uint8_t* src, size_t len)
 }
 
 // RotateLeft - Ultralight, Desfire
-void rol(uint8_t *data, const size_t len){
+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];
@@ -347,17 +346,18 @@ void StartCountUS()
 uint32_t RAMFUNC GetCountUS(){
        //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); 
+       //return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV * 2) / 3); 
+       return (AT91C_BASE_TC1->TC_CV * 0x8000) + ((AT91C_BASE_TC0->TC_CV << 1) / 3); 
 }
 
-static uint32_t GlobalUsCounter = 0;
+// 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;
-}
+// uint32_t RAMFUNC GetDeltaCountUS(){
+       // uint32_t g_cnt = GetCountUS();
+       // uint32_t g_res = g_cnt - GlobalUsCounter;
+       // GlobalUsCounter = g_cnt;
+       // return g_res;
+// }
 
 
 //  -------------------------------------------------------------------------
@@ -398,17 +398,17 @@ void StartCountSspClk()
        AT91C_BASE_TC2->TC_CMR = AT91C_TC_CLKS_XC2                              // TC2 clock = XC2 clock = TIOA0
                                                        | AT91C_TC_WAVE                                 // Waveform Mode
                                                        | AT91C_TC_WAVESEL_UP;                  // just count
-       
+
        AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN;                                // enable TC0
        AT91C_BASE_TC1->TC_CCR = AT91C_TC_CLKEN;                                // enable TC1
        AT91C_BASE_TC2->TC_CCR = AT91C_TC_CLKEN;                                // enable TC2
 
-       //
-       // synchronize the counter with the ssp_frame signal. Note: FPGA must be in any iso14446 mode, otherwise the frame signal would not be present 
-       //
+       // synchronize the counter with the ssp_frame signal. 
+       // Note: FPGA must be in any iso14443 mode, otherwise the frame signal would not be present 
        while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_FRAME));   // wait for ssp_frame to go high (start of frame)
        while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_FRAME);              // wait for ssp_frame to be low
        while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK));     // wait for ssp_clk to go high
+
        // note: up to now two ssp_clk rising edges have passed since the rising edge of ssp_frame
        // it is now safe to assert a sync signal. This sets all timers to 0 on next active clock edge
        AT91C_BASE_TCB->TCB_BCR = 1;                                                    // assert Sync (set all timers to 0 on next active clock edge)
@@ -416,8 +416,9 @@ void StartCountSspClk()
        // at the next (4th) ssp_clk rising edge, TC0 (the low word of our counter) will be reset. From now on,
        // whenever the last three bits of our counter go 0, we can be sure to be in the middle of a frame transfer.
        // (just started with the transfer of the 4th Bit).
-       // The high word of the counter (TC2) will not reset until the low word (TC0) overflows. Therefore need to wait quite some time before
-       // we can use the counter.
+
+       // The high word of the counter (TC2) will not reset until the low word (TC0) overflows. 
+       // Therefore need to wait quite some time before we can use the counter.
        while (AT91C_BASE_TC0->TC_CV < 0xFFF0);
 }