#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};
int GraphTraceLen = BigBuf_max_traceLen();
if ( GraphTraceLen > 18000 )
GraphTraceLen = 18000;
-
-
+
int i, j, lastval, bitidx, half_switch;
int clock = 64;
int tolerance = clock / 8;
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);
// 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 ! */
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 ! */
}
else
half_switch++;
- } else if (abs(lc-clock) < tolerance) {
+ } else if (ABS(lc-clock) < tolerance) {
// 64TO
bits[bitidx++] = 1;
} else {
int IsBlock1PCF7931(uint8_t *Block) {
// Assume RFU means 0 :)
- if(Block[10] == 0 && Block[11] == 0 && Block[12] == 0 && Block[13] == 0)
- if((Block[14] & 0x7f) <= 9 && Block[15] <= 9)
+ if( Block[10] == 0 &&
+ Block[11] == 0 &&
+ Block[12] == 0 &&
+ Block[13] == 0)
+ if ( (Block[14] & 0x7f) <= 9 && Block[15] <= 9)
return 1;
-
return 0;
}
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;
*/
void WritePCF7931(uint8_t pass1, uint8_t pass2, uint8_t pass3, uint8_t pass4, uint8_t pass5, uint8_t pass6, uint8_t pass7, uint16_t init_delay, int32_t l, int32_t p, uint8_t address, uint8_t byte, uint8_t data)
{
-
- uint32_t tab[1024]={0}; // data times frame
+ uint32_t tab[1024] = {0}; // data times frame
uint32_t u = 0;
uint8_t parity = 0;
bool comp = 0;
//password indication bit
AddBitPCF7931(1, tab, l, p);
-
//password (on 56 bits)
Dbprintf("Password (LSB first on each byte) : %02x %02x %02x %02x %02x %02x %02x", pass1,pass2,pass3,pass4,pass5,pass6,pass7);
AddBytePCF7931(pass1, tab, l, p);
tab[u]=(tab[u] * 3)/2;
}
-
- //compennsation of the counter reload
+ //compensation of the counter reload
while (!comp){
comp = 1;
for(u=0;tab[u]!=0;u++){
*/
void SendCmdPCF7931(uint32_t * tab){
- uint16_t u=0;
- uint16_t tempo=0;
+ uint16_t u=0, tempo=0;
- Dbprintf("SENDING DATA FRAME...");
+ Dbprintf("Sending data frame...");
FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
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
tempo = AT91C_BASE_TC0->TC_CV;
- for(u=0;tab[u]!= 0;u+=3){
-
+ for( u = 0; tab[u] != 0; u += 3){
// modulate antenna
HIGH(GPIO_SSC_DOUT);
- while(tempo != tab[u]){
- tempo = AT91C_BASE_TC0->TC_CV;
- }
+ while(tempo != tab[u]) tempo = AT91C_BASE_TC0->TC_CV;
// stop modulating antenna
LOW(GPIO_SSC_DOUT);
- while(tempo != tab[u+1]){
- tempo = AT91C_BASE_TC0->TC_CV;
- }
-
+ while(tempo != tab[u+1]) tempo = AT91C_BASE_TC0->TC_CV;
// modulate antenna
HIGH(GPIO_SSC_DOUT);
- while(tempo != tab[u+2]){
- tempo = AT91C_BASE_TC0->TC_CV;
- }
+ while(tempo != tab[u+2]) tempo = AT91C_BASE_TC0->TC_CV;
}
LED_A_OFF();
bool AddBytePCF7931(uint8_t byte, uint32_t * tab, int32_t l, int32_t p){
uint32_t u;
- for (u=0; u<8; u++)
+ for ( u=0; u<8; u++)
{
if (byte&(1<<u)) { //bit à 1
- if(AddBitPCF7931(1, tab, l, p)==1)return 1;
+ if( AddBitPCF7931(1, tab, l, p)==1) return 1;
} else { //bit à 0
- if(AddBitPCF7931(0, tab, l, p)==1)return 1;
+ if (AddBitPCF7931(0, tab, l, p)==1) return 1;
}
}
-
return 0;
}
bool AddBitPCF7931(bool b, uint32_t * tab, int32_t l, int32_t p){
uint8_t u = 0;
- for(u=0;tab[u]!=0;u+=3){} //we put the cursor at the last value of the array
+ //we put the cursor at the last value of the array
+ for ( u = 0; tab[u] != 0; u += 3 ) { }
+ if ( b == 1 ) { //add a bit 1
+ if ( u == 0 )
+ tab[u] = 34 * T0_PCF + p;
+ else
+ tab[u] = 34 * T0_PCF + tab[u-1] + p;
- if(b==1){ //add a bit 1
- if(u==0) tab[u] = 34*T0_PCF+p;
- else tab[u] = 34*T0_PCF+tab[u-1]+p;
-
- tab[u+1] = 6*T0_PCF+tab[u]+l;
- tab[u+2] = 88*T0_PCF+tab[u+1]-l-p;
+ tab[u+1] = 6 * T0_PCF + tab[u] + l;
+ tab[u+2] = 88 * T0_PCF + tab[u+1] - l - p;
return 0;
- }else{ //add a bit 0
+ } else { //add a bit 0
- if(u==0) tab[u] = 98*T0_PCF+p;
- else tab[u] = 98*T0_PCF+tab[u-1]+p;
+ if ( u == 0 )
+ tab[u] = 98 * T0_PCF + p;
+ else
+ tab[u] = 98 * T0_PCF + tab[u-1] + p;
- tab[u+1] = 6*T0_PCF+tab[u]+l;
- tab[u+2] = 24*T0_PCF+tab[u+1]-l-p;
+ tab[u+1] = 6 * T0_PCF + tab[u] + l;
+ tab[u+2] = 24 * T0_PCF + tab[u+1] - l - p;
return 0;
}
-
-
return 1;
}
*/
bool AddPatternPCF7931(uint32_t a, uint32_t b, uint32_t c, uint32_t * tab){
uint32_t u = 0;
- for(u=0;tab[u]!=0;u+=3){} //we put the cursor at the last value of the array
-
- if(u==0) tab[u] = a;
- else tab[u] = a + tab[u-1];
+ for(u = 0; tab[u] != 0; u += 3){} //we put the cursor at the last value of the array
- tab[u+1] = b+tab[u];
- tab[u+2] = c+tab[u+1];
+ tab[u] = (u == 0) ? a : a + tab[u-1];
+ tab[u+1] = b + tab[u];
+ tab[u+2] = c + tab[u+1];
return 0;
}
\ No newline at end of file
projects / proxmark3-svn / blobdiff