More en masse cleanup (whitespace/newlines/headers/etc)

[proxmark3-svn] / armsrc / legicrf.c

diff --git a/armsrc/legicrf.c b/armsrc/legicrf.c
index 07a930c9ccef33b2bdeb2a3251f84770c1491870..86a4d5de052b188d4da4eaee65d38330539c26d7 100644 (file)
--- a/armsrc/legicrf.c
+++ b/armsrc/legicrf.c
@@ -1,15 +1,14 @@
 /*
  * LEGIC RF simulation code
- *  
+ *
  * (c) 2009 Henryk Plötz <henryk@ploetzli.ch>
  */
 
-#include <proxmark3.h>
+#include "proxmark3.h"
 
 #include "apps.h"
 #include "legicrf.h"
-#include "unistd.h"
-#include "stdint.h"
+#include <stdint.h>
 
 #include "legic_prng.h"
 #include "crc.h"
@@ -54,7 +53,7 @@ static void frame_send_rwd(uint32_t data, int bits)
        /* Start clock */
        timer->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG;
        while(timer->TC_CV > 1) ; /* Wait till the clock has reset */
-       
+
        int i;
        for(i=0; i<bits; i++) {
                int starttime = timer->TC_CV;
@@ -67,17 +66,17 @@ static void frame_send_rwd(uint32_t data, int bits)
                } else {
                        bit_end = starttime + RWD_TIME_0;
                }
-               
+
                /* RWD_TIME_PAUSE time off, then some time on, so that the complete bit time is
                 * RWD_TIME_x, where x is the bit to be transmitted */
                AT91C_BASE_PIOA->PIO_CODR = GPIO_SSC_DOUT;
                while(timer->TC_CV < pause_end) ;
                AT91C_BASE_PIOA->PIO_SODR = GPIO_SSC_DOUT;
                legic_prng_forward(1); /* bit duration is longest. use this time to forward the lfsr */
-               
+
                while(timer->TC_CV < bit_end) ;
        }
-       
+
        {
                /* One final pause to mark the end of the frame */
                int pause_end = timer->TC_CV + RWD_TIME_PAUSE;
@@ -85,7 +84,7 @@ static void frame_send_rwd(uint32_t data, int bits)
                while(timer->TC_CV < pause_end) ;
                AT91C_BASE_PIOA->PIO_SODR = GPIO_SSC_DOUT;
        }
-       
+
        /* Reset the timer, to measure time until the start of the tag frame */
        timer->TC_CCR = AT91C_TC_SWTRG;
        while(timer->TC_CV > 1) ; /* Wait till the clock has reset */
@@ -93,12 +92,12 @@ static void frame_send_rwd(uint32_t data, int bits)
 
 /* Receive a frame from the card in reader emulation mode, the FPGA and
  * timer must have been set up by LegicRfReader and frame_send_rwd.
- * 
+ *
  * The LEGIC RF protocol from card to reader does not include explicit
  * frame start/stop information or length information. The reader must
  * know beforehand how many bits it wants to receive. (Notably: a card
  * sending a stream of 0-bits is indistinguishable from no card present.)
- * 
+ *
  * Receive methodology: There is a fancy correlator in hi_read_rx_xcorr, but
  * I'm not smart enough to use it. Instead I have patched hi_read_tx to output
  * the ADC signal with hysteresis on SSP_DIN. Bit-bang that signal and look
@@ -107,10 +106,10 @@ static void frame_send_rwd(uint32_t data, int bits)
  * expected for a 212kHz subcarrier, this was a 1-bit. For timing we use the
  * timer that's still running from frame_send_rwd in order to get a synchronization
  * with the frame that we just sent.
- * 
- * FIXME: Because we're relying on the hysteresis to just do the right thing 
+ *
+ * FIXME: Because we're relying on the hysteresis to just do the right thing
  * the range is severely reduced (and you'll probably also need a good antenna).
- * So this should be fixed some time in the future for a proper receiver. 
+ * So this should be fixed some time in the future for a proper receiver.
  */
 static void frame_receive_rwd(struct legic_frame * const f, int bits, int crypt)
 {
@@ -118,8 +117,8 @@ static void frame_receive_rwd(struct legic_frame * const f, int bits, int crypt)
        uint32_t data=0;
        int i, old_level=0, edges=0;
        int next_bit_at = TAG_TIME_WAIT;
-       
-       
+
+
        if(bits > 16)
                bits = 16;
 
@@ -141,7 +140,7 @@ static void frame_receive_rwd(struct legic_frame * const f, int bits, int crypt)
        while(timer->TC_CV < next_bit_at) ;
 
        next_bit_at += TAG_TIME_BIT;
-       
+
        for(i=0; i<bits; i++) {
                edges = 0;
 
@@ -152,17 +151,17 @@ static void frame_receive_rwd(struct legic_frame * const f, int bits, int crypt)
                        old_level = level;
                }
                next_bit_at += TAG_TIME_BIT;
-               
+
                if(edges > 20 && edges < 60) { /* expected are 42 edges */
                        data ^= the_bit;
                }
 
                the_bit <<= 1;
        }
-       
+
        f->data = data;
        f->bits = bits;
-       
+
        /* Reset the timer, to synchronize the next frame */
        timer->TC_CCR = AT91C_TC_SWTRG;
        while(timer->TC_CV > 1) ; /* Wait till the clock has reset */
@@ -176,15 +175,15 @@ static void frame_clean(struct legic_frame * const f)
 
 static uint32_t perform_setup_phase_rwd(int iv)
 {
-       
+
        /* Switch on carrier and let the tag charge for 1ms */
        AT91C_BASE_PIOA->PIO_SODR = GPIO_SSC_DOUT;
        SpinDelay(1);
-       
+
        legic_prng_init(0); /* no keystream yet */
        frame_send_rwd(iv, 7);
         legic_prng_init(iv);
-       
+
        frame_clean(&current_frame);
        frame_receive_rwd(&current_frame, 6, 1);
        legic_prng_forward(1); /* we wait anyways */
@@ -198,14 +197,14 @@ static void LegicCommonInit(void) {
        SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
        FpgaSetupSsc();
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX);
-       
+
        /* Bitbang the transmitter */
        AT91C_BASE_PIOA->PIO_CODR = GPIO_SSC_DOUT;
        AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
        AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT;
-       
+
        setup_timer();
-       
+
        crc_init(&legic_crc, 4, 0x19 >> 1, 0x5, 0);
 }
 
@@ -214,7 +213,7 @@ static void switch_off_tag_rwd(void)
        /* Switch off carrier, make sure tag is reset */
        AT91C_BASE_PIOA->PIO_CODR = GPIO_SSC_DOUT;
        SpinDelay(10);
-       
+
        WDT_HIT();
 }
 /* calculate crc for a legic command */
@@ -257,11 +256,11 @@ int legic_read_byte(int byte_index, int cmd_sz) {
 
 void LegicRfReader(int offset, int bytes) {
        int byte_index=0, cmd_sz=0, card_sz=0;
-       
+
        LegicCommonInit();
 
        memset(BigBuf, 0, 1024);
-       
+
        DbpString("setting up legic card");
        uint32_t tag_type = perform_setup_phase_rwd(0x55);
        switch(tag_type) {
@@ -301,6 +300,6 @@ void LegicRfReader(int offset, int bytes) {
                byte_index++;
        }
        switch_off_tag_rwd();
-       Dbprintf("Card read, use 'data hexsamples %d' to view results", (bytes+7) & ~7);
+       Dbprintf("Card read, use 'hf legic decode' or 'data hexsamples %d' to view results", (bytes+7) & ~7);
 }