X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/a61b4976bd2085bf0495855b48fcad0d9ed4572e..06b58a94f0be3256853a97387fc7e5782ce335c7:/armsrc/lfops.c

diff --git a/armsrc/lfops.c b/armsrc/lfops.c
index c80caf77..0755e1e5 100644
--- a/armsrc/lfops.c
+++ b/armsrc/lfops.c
@@ -449,61 +449,78 @@ void WriteTItag(uint32_t idhi, uint32_t idlo, uint16_t crc)
 	DbpString("Now use tiread to check");
 }
 
+
+        
+// PIO_CODR = Clear Output Data Register
+// PIO_SODR = Set Output Data Register
+//#define LOW(x)	 AT91C_BASE_PIOA->PIO_CODR = (x)
+//#define HIGH(x)	 AT91C_BASE_PIOA->PIO_SODR = (x)
 void SimulateTagLowFrequency(int period, int gap, int ledcontrol)
 {
 	int i = 0;
-	uint8_t *buff = (uint8_t *)BigBuf;
+	uint8_t *buf = (uint8_t *)BigBuf;
 
 	FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
 	FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
 	FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT);
+	
+	// Connect the A/D to the peak-detected low-frequency path.
 	SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
 
-	// Configure output and enable pin that is connected to the FPGA (for modulating)
-	AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT | GPIO_SSC_CLK;    
-	AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
+	// Now set up the SSC to get the ADC samples that are now streaming at us.
+	FpgaSetupSsc();
 	
-	AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_CLK;
+	// Configure output and enable pin that is connected to the FPGA (for modulating)
+	// AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT | GPIO_SSC_CLK; // (PIO_PER) PIO Enable Register
+	// AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;    // (PIO_OER) Output Enable Register
+	// AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_CLK;     // (PIO_ODR) Output Disable Register
 
-	// Give it a bit of time for the resonant antenna to settle.
-	SpinDelay(30);
+	AT91C_BASE_PIOA->PIO_OER = GPIO_PCK0;
+	
+ 	while(!BUTTON_PRESS()) { 
+		WDT_HIT();
 
-	for(;;) { 
-		
-		while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {
+		// PIO_PDSR = Pin Data Status Register  
+		// GPIO_SSC_CLK  = SSC Transmit Clock
+		// wait ssp_clk == high
+		while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {  
 			 if(BUTTON_PRESS()) {
 				 DbpString("Stopped at 0");
-				 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
 				 return;
 			 }
 			 WDT_HIT();
 		}
-        
-		if ( buff[i] )
+		
+		if ( buf[i] > 0 ){
 			OPEN_COIL();
-		else
+		} else {
 			SHORT_COIL();
-       
-		 while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK) {
+		}
+	   
+	   DbpString("Enter Sim3");
+	    // wait ssp_clk == low
+		 while( (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK) ) {  
 			 if(BUTTON_PRESS()) {
-				DbpString("Stopped at 1");
-				FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); // field off
+				DbpString("stopped at 1");
 				return;
 			}
 			WDT_HIT();
-		 }
-        
+		}
+		
+		DbpString("Enter Sim4 ");
+		//SpinDelayUs(512);
+		
 		++i;
 		if(i == period) {
 			i = 0;
 			if (gap) {
-				// turn of modulation
 				SHORT_COIL();
-				// wait
-				SpinDelay(gap);
+				SpinDelay(gap);				
 			} 
 		}
 	}
+	DbpString("Stopped");
+	return;
 }
 
 #define DEBUG_FRAME_CONTENTS 1