CHG: execution mode

[proxmark3-svn] / armsrc / legicrf.c

diff --git a/armsrc/legicrf.c b/armsrc/legicrf.c
index 4aa45b6d6040280b80e105965dc4e37edad0e386..1b068404296892aee0eb1fd74cef54cb4af326d3 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 144     // 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
@@ -280,7 +280,6 @@ static void frame_receiveAsReader(struct legic_frame * const f, uint8_t bits) {
        //FIXED time between sending frame and now listening frame. 330us
        uint32_t starttime = GET_TICKS;
        // its about 9+9 ticks delay from end-send to here.
-       //WaitTicks( 495 - 9 - 9 );             
        WaitTicks( 477 );
 
        next_bit_at = GET_TICKS + TAG_BIT_PERIOD;
@@ -396,8 +395,10 @@ 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); 
+       //WaitTicks(330); // (4)
+       WaitTicks(240); // (3)
+       //WaitTicks(230); //(2)
+       //WaitTicks(60); //(1)
        
        frame_sendAsReader(cmd, cmd_sz);
        frame_receiveAsReader(&current_frame, 12);
@@ -412,7 +413,7 @@ int legic_read_byte( uint16_t index, uint8_t cmd_sz) {
                return -1;
        }
 
-       legic_prng_forward(4);
+       legic_prng_forward(3);
        return byte;
 }
 
@@ -433,11 +434,11 @@ int legic_write_byte(uint8_t byte, uint16_t addr, uint8_t addr_sz) {
        crc_update(&legic_crc, addr, addr_sz);
        crc_update(&legic_crc, byte, 8);
        uint32_t crc = crc_finish(&legic_crc);
-
        uint32_t crc2 = legic4Crc(LEGIC_WRITE, addr, byte, addr_sz+1);
-       if ( crc != crc2 ) 
+       if ( crc != crc2 ) {
                Dbprintf("crc is missmatch");
-       
+               return 1;
+       }
        // send write command
        uint32_t cmd = ((crc     <<(addr_sz+1+8)) //CRC
                    |(byte    <<(addr_sz+1))   //Data
@@ -448,11 +449,10 @@ int legic_write_byte(uint8_t byte, uint16_t addr, uint8_t addr_sz) {
 
     legic_prng_forward(2); /* we wait anyways */
        
-       WaitUS(TAG_FRAME_WAIT);
+       WaitTicks(330);
        
        frame_sendAsReader(cmd, cmd_sz);
-  
- 
+   
        AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_DIN;
        AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DIN;
 
@@ -488,8 +488,6 @@ 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;
@@ -525,7 +523,7 @@ OUT:
        WDT_HIT();
        switch_off_tag_rwd();
        LEDsoff();
-       cmd_send(CMD_ACK,isOK,len,0,cardmem,len);
+       cmd_send(CMD_ACK, isOK, len, 0, cardmem, len);
     return 0;
 }