FIX: undeclared var on deviceside,

[proxmark3-svn] / armsrc / legicrf.c

diff --git a/armsrc/legicrf.c b/armsrc/legicrf.c
index 1b068404296892aee0eb1fd74cef54cb4af326d3..9944ac462dda40b1bb144944e21ff3e17a46c7d7 100644 (file)
--- a/armsrc/legicrf.c
+++ b/armsrc/legicrf.c
@@ -140,14 +140,13 @@ static void frame_clean(struct legic_frame * const f) {
 
 /* Generate Keystream */
 uint32_t get_key_stream(int skip, int count) {
-       uint32_t key = 0;
+
        int i;
 
        // Use int to enlarge timer tc to 32bit
        legic_prng_bc += prng_timer->TC_CV;
 
        // reset the prng timer.
-       ResetTimer(prng_timer);
 
        /* If skip == -1, forward prng time based */
        if(skip == -1) {
@@ -161,55 +160,41 @@ uint32_t get_key_stream(int skip, int count) {
 
        i = (count == 6) ? -1 : legic_read_count;
 
-       /* Write Time Data into LOG */
-       // uint8_t *BigBuf = BigBuf_get_addr();
-       // BigBuf[OFFSET_LOG+128+i] = legic_prng_count();
-       // BigBuf[OFFSET_LOG+256+i*4]   = (legic_prng_bc >> 0) & 0xff;
-       // BigBuf[OFFSET_LOG+256+i*4+1] = (legic_prng_bc >> 8) & 0xff;
-       // BigBuf[OFFSET_LOG+256+i*4+2] = (legic_prng_bc >>16) & 0xff;
-       // BigBuf[OFFSET_LOG+256+i*4+3] = (legic_prng_bc >>24) & 0xff;
-       // BigBuf[OFFSET_LOG+384+i] = count;
+       // log
+       //uint8_t cmdbytes[] = {bits,   BYTEx(data, 0), BYTEx(data, 1), BYTEx(send, 0), BYTEx(send, 1), legic_prng_count()};
+       //LogTrace(cmdbytes, sizeof(cmdbytes), starttime, GET_TICKS, NULL, TRUE);
 
        /* Generate KeyStream */
-       for(i=0; i<count; i++) {
-               key |= legic_prng_get_bit() << i;
-               legic_prng_forward(1);
-       }
-       return key;
+       return legic_prng_get_bits(count);
 }
 
 /* Send a frame in tag mode, the FPGA must have been set up by
  * LegicRfSimulate
  */
-void frame_send_tag(uint16_t response, uint8_t bits, uint8_t crypt) {
+void frame_send_tag(uint16_t response, uint8_t bits) {
+
+       uint16_t mask = 1;
+       
        /* Bitbang the response */
-       LOW(GPIO_SSC_DOUT);
+       SHORT_COIL;
        AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
        AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT;
 
-       /* Use time to crypt frame */
-       if(crypt) {
-               legic_prng_forward(2); /* TAG_FRAME_WAIT -> shift by 2 */
-               response ^= legic_prng_get_bits(bits);
-       }
+        /* TAG_FRAME_WAIT -> shift by 2 */
+       legic_prng_forward(2);
+       response ^= legic_prng_get_bits(bits);
 
        /* Wait for the frame start */
-       WaitUS( TAG_FRAME_WAIT );
-
-       uint8_t bit = 0;
-       for(int i = 0; i < bits; i++) {
+       WaitTicks( TAG_FRAME_WAIT );
 
-               bit = response & 1;
-               response >>= 1;
-
-               if (bit)
-                       HIGH(GPIO_SSC_DOUT);
+       for (; mask < BITMASK(bits); mask <<= 1) {      
+               if (response & mask)
+                       OPEN_COIL;
                else
-                       LOW(GPIO_SSC_DOUT);
-                 
-               WaitUS(100);
+                       SHORT_COIL;
+               WaitTicks(TAG_BIT_PERIOD);
    }
-   LOW(GPIO_SSC_DOUT);
+   SHORT_COIL;
 }
 
 /* Send a frame in reader mode, the FPGA must have been set up by
@@ -394,11 +379,10 @@ int legic_read_byte( uint16_t index, uint8_t cmd_sz) {
 
        uint8_t byte, crc, calcCrc = 0;
        uint32_t cmd = (index << 1) | LEGIC_READ;
-
-       //WaitTicks(330); // (4)
-       WaitTicks(240); // (3)
-       //WaitTicks(230); //(2)
-       //WaitTicks(60); //(1)
+       
+       // 90ticks = 60us (should be 100us but crc calc takes time.)
+       //WaitTicks(330); // 330ticks prng(4) - works
+       WaitTicks(240); // 240ticks prng(3) - works
        
        frame_sendAsReader(cmd, cmd_sz);
        frame_receiveAsReader(&current_frame, 12);
@@ -447,7 +431,7 @@ int legic_write_byte(uint8_t byte, uint16_t addr, uint8_t addr_sz) {
                                   
     uint32_t cmd_sz = addr_sz+1+8+4;          //crc+data+cmd
 
-    legic_prng_forward(2); /* we wait anyways */
+    legic_prng_forward(2);
        
        WaitTicks(330);
        
@@ -460,7 +444,7 @@ int legic_write_byte(uint8_t byte, uint16_t addr, uint8_t addr_sz) {
     int t, old_level = 0, edges = 0;
     int next_bit_at = 0;
 
-       WaitUS(TAG_FRAME_WAIT);
+       WaitTicks(TAG_FRAME_WAIT);
 
     for( t = 0; t < 80; ++t) {
         edges = 0;
@@ -763,7 +747,7 @@ void LegicRfInfo(void){
        }
 
        cmd_send(CMD_ACK, 1, 0, 0, buf, sizeof(legic_card_select_t));
-       
+
 OUT:
        switch_off_tag_rwd();
        LEDsoff();
@@ -776,26 +760,26 @@ static void frame_handle_tag(struct legic_frame const * const f)
 {
        uint8_t *BigBuf = BigBuf_get_addr();
 
-   /* First Part of Handshake (IV) */
-   if(f->bits == 7) {
+       /* First Part of Handshake (IV) */
+       if(f->bits == 7) {
+
+               LED_C_ON();
 
-        LED_C_ON();
-        
                // Reset prng timer
                ResetTimer(prng_timer);
-               
-        legic_prng_init(f->data);
-        frame_send_tag(0x3d, 6, 1); /* 0x3d^0x26 = 0x1B */
-        legic_state = STATE_IV;
-        legic_read_count = 0;
-        legic_prng_bc = 0;
-        legic_prng_iv = f->data;
- 
- 
+
+               legic_prng_init(f->data);
+               frame_send_tag(0x3d, 6); /* 0x3d^0x26 = 0x1B */
+               legic_state = STATE_IV;
+               legic_read_count = 0;
+               legic_prng_bc = 0;
+               legic_prng_iv = f->data;
+
+
                ResetTimer(timer);
                WaitUS(280);
-        return;
-   }
+               return;
+       }
 
    /* 0x19==??? */
    if(legic_state == STATE_IV) {
@@ -829,7 +813,7 @@ static void frame_handle_tag(struct legic_frame const * const f)
          //Dbprintf("Data:%03.3x, key:%03.3x, addr: %03.3x, read_c:%u", f->data, key, addr, read_c);
          legic_prng_forward(legic_reqresp_drift);
 
-         frame_send_tag(hash | data, 12, 1);
+         frame_send_tag(hash | data, 12);
 
                 ResetTimer(timer);
          legic_prng_forward(2);