Merge branch 'master' of https://github.com/iceman1001/proxmark3

[proxmark3-svn] / armsrc / legicrf.c

diff --git a/armsrc/legicrf.c b/armsrc/legicrf.c
index 4e0bc240ed6b4ca892811e69cad120b7807e59d7..86e42c1723ed98797e975a8e8aafae46710528f8 100644 (file)
--- a/armsrc/legicrf.c
+++ b/armsrc/legicrf.c
@@ -72,7 +72,7 @@ static void setup_timer(void) {
 #define        RWD_TIME_1 120          // READER_TIME_PAUSE 20us off, 80us on = 100us  80 * 1.5 == 120ticks
 #define RWD_TIME_0 60          // READER_TIME_PAUSE 20us off, 40us on = 60us   40 * 1.5 == 60ticks 
 #define RWD_TIME_PAUSE 30      // 20us == 20 * 1.5 == 30ticks */
-#define TAG_BIT_PERIOD 143     // 100us == 100 * 1.5 == 150ticks
+#define TAG_BIT_PERIOD 142     // 100us == 100 * 1.5 == 150ticks
 #define TAG_FRAME_WAIT 495  // 330us from READER frame end to TAG frame start. 330 * 1.5 == 495
 
 #define RWD_TIME_FUZZ 20   // rather generous 13us, since the peak detector + hysteresis fuzz quite a bit
@@ -394,9 +394,10 @@ 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(366); 
-       WaitTicks(330); 
+       
+       // 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);
@@ -411,7 +412,7 @@ int legic_read_byte( uint16_t index, uint8_t cmd_sz) {
                return -1;
        }
 
-       legic_prng_forward(4);
+       legic_prng_forward(3);
        return byte;
 }
 
@@ -486,8 +487,6 @@ int legic_write_byte(uint8_t byte, uint16_t addr, uint8_t addr_sz) {
 
 int LegicRfReader(uint16_t offset, uint16_t len, uint8_t iv) {
        
-       len &= 0x3FF;
-
        uint16_t i = 0;
        uint8_t isOK = 1;
        legic_card_select_t card;
@@ -763,7 +762,7 @@ void LegicRfInfo(void){
        }
 
        cmd_send(CMD_ACK, 1, 0, 0, buf, sizeof(legic_card_select_t));
-       
+
 OUT:
        switch_off_tag_rwd();
        LEDsoff();