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

[proxmark3-svn] / armsrc / pcf7931.c

diff --git a/armsrc/pcf7931.c b/armsrc/pcf7931.c
index 4d45a69cfe5e94fc721286f6e06cdaf2ebca5b5e..58fd50998495eb18773cdcc4fb0ee9dcad18a467 100644 (file)
--- a/armsrc/pcf7931.c
+++ b/armsrc/pcf7931.c
@@ -7,9 +7,6 @@
 #define T0_PCF 8 //period for the pcf7931 in us
 #define ALLOC 16
 
-#define abs(x) ( ((x)<0) ? -(x) : (x) )
-#define max(x,y) ( x<y ? y:x)
-
 int DemodPCF7931(uint8_t **outBlocks) {
 
     uint8_t bits[256] = {0x00};
@@ -28,6 +25,8 @@ int DemodPCF7931(uint8_t **outBlocks) {
        int num_blocks = 0;
        int lmin=128, lmax=128;
        uint8_t dir;
+       //clear read buffer
+       BigBuf_Clear_keep_EM();
 
        LFSetupFPGAForADC(95, true);
        DoAcquisition_default(0, true);
@@ -69,7 +68,7 @@ int DemodPCF7931(uint8_t **outBlocks) {
 
                        // Switch depending on lc length:
                        // Tolerance is 1/8 of clock rate (arbitrary)
-                       if (abs(lc-clock/4) < tolerance) {
+                       if (ABS(lc-clock/4) < tolerance) {
                                // 16T0
                                if((i - pmc) == lc) { /* 16T0 was previous one */
                                        /* It's a PMC ! */
@@ -81,7 +80,7 @@ int DemodPCF7931(uint8_t **outBlocks) {
                                else {
                                        pmc = i;
                                }
-                       } else if (abs(lc-clock/2) < tolerance) {
+                       } else if (ABS(lc-clock/2) < tolerance) {
                                // 32TO
                                if((i - pmc) == lc) { /* 16T0 was previous one */
                                        /* It's a PMC ! */
@@ -96,7 +95,7 @@ int DemodPCF7931(uint8_t **outBlocks) {
                                }
                                else
                                        half_switch++;
-                       } else if (abs(lc-clock) < tolerance) {
+                       } else if (ABS(lc-clock) < tolerance) {
                                // 64TO
                 bits[bitidx++] = 1;
                        } else {
@@ -203,7 +202,7 @@ void ReadPCF7931() {
                                                Blocks[0][ALLOC] = 1;
                                                memcpy(Blocks[1], tmpBlocks[i+1], 16);
                                                Blocks[1][ALLOC] = 1;
-                                               max_blocks = max((Blocks[1][14] & 0x7f), Blocks[1][15]) + 1;
+                                               max_blocks = MAX((Blocks[1][14] & 0x7f), Blocks[1][15]) + 1;
                                                // Debug print
                                                Dbprintf("(dbg) Max blocks: %d", max_blocks);
                                                num_blocks = 2;
@@ -403,7 +402,7 @@ void SendCmdPCF7931(uint32_t * tab){
        AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
 
        //initialization of the timer
-       AT91C_BASE_PMC->PMC_PCER |= (0x1 << 12) | (0x1 << 13) | (0x1 << 14);
+       AT91C_BASE_PMC->PMC_PCER |= (0x1 << AT91C_ID_TC0);
        AT91C_BASE_TCB->TCB_BMR = AT91C_TCB_TC0XC0S_NONE | AT91C_TCB_TC1XC1S_TIOA0 | AT91C_TCB_TC2XC2S_NONE;
        AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS; // timer disable
        AT91C_BASE_TC0->TC_CMR = AT91C_TC_CLKS_TIMER_DIV3_CLOCK;  //clock at 48/32 MHz
@@ -489,8 +488,6 @@ bool AddBitPCF7931(bool b, uint32_t * tab, int32_t l, int32_t p){
                tab[u+2] = 24 * T0_PCF + tab[u+1] - l - p;
                return 0;
        }
-
-       
        return 1;
 }