#include "crapto1.h"
#include "mifareutil.h"
+#define SHORT_COIL() LOW(GPIO_SSC_DOUT)
+#define OPEN_COIL() HIGH(GPIO_SSC_DOUT)
+
void LFSetupFPGAForADC(int divisor, bool lf_field)
{
FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
{
uint8_t *dest = mifare_get_bigbufptr();
int n = 24000;
- int i;
-
+ int i = 0;
memset(dest, 0x00, n);
- i = 0;
+
for(;;) {
if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
AT91C_BASE_SSC->SSC_THR = 0x43;
{
if (b&(1<<i)) {
// stop modulating antenna
- LOW(GPIO_SSC_DOUT);
+ SHORT_COIL();
SpinDelayUs(1000);
// modulate antenna
- HIGH(GPIO_SSC_DOUT);
+ OPEN_COIL();
SpinDelayUs(1000);
} else {
// stop modulating antenna
- LOW(GPIO_SSC_DOUT);
+ SHORT_COIL();
SpinDelayUs(300);
// modulate antenna
- HIGH(GPIO_SSC_DOUT);
+ OPEN_COIL();
SpinDelayUs(1700);
}
}
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;
- uint8_t *buff = (uint8_t *)BigBuf;
-
+ int i = 0;
+ 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);
+
+ // Now set up the SSC to get the ADC samples that are now streaming at us.
+ FpgaSetupSsc();
- // Give it a bit of time for the resonant antenna to settle.
- SpinDelay(150);
+ // 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
+
+ AT91C_BASE_PIOA->PIO_OER = GPIO_PCK0;
- AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT | GPIO_SSC_CLK;
- AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT;
- AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_CLK;
-
-#define SHORT_COIL() LOW(GPIO_SSC_DOUT)
-#define OPEN_COIL() HIGH(GPIO_SSC_DOUT)
-
- i = 0;
- for(;;) {
- while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {
- if(BUTTON_PRESS()) {
- DbpString("Stopped");
- return;
- }
- WDT_HIT();
+ while(!BUTTON_PRESS()) {
+ WDT_HIT();
+
+ // 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");
+ return;
+ }
+ WDT_HIT();
}
-
- if (ledcontrol)
- LED_D_ON();
-
- if(buff[i])
+
+ if ( buf[i] > 0 ){
OPEN_COIL();
- else
+ } else {
SHORT_COIL();
-
- if (ledcontrol)
- LED_D_OFF();
-
- while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK) {
- if(BUTTON_PRESS()) {
- DbpString("Stopped");
+ }
+
+ DbpString("Enter Sim3");
+ // wait ssp_clk == low
+ while( (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK) ) {
+ if(BUTTON_PRESS()) {
+ DbpString("stopped at 1");
return;
}
WDT_HIT();
}
-
- i++;
+
+ DbpString("Enter Sim4 ");
+ //SpinDelayUs(512);
+
+ ++i;
if(i == period) {
i = 0;
if (gap) {
SHORT_COIL();
- SpinDelayUs(gap);
- }
+ SpinDelay(gap);
+ }
}
}
+ DbpString("Stopped");
+ return;
}
#define DEBUG_FRAME_CONTENTS 1
if (ledcontrol)
LED_A_ON();
+
SimulateTagLowFrequency(n, 0, ledcontrol);
if (ledcontrol)
LFSetupFPGAForADC(0, true);
while(!BUTTON_PRESS()) {
-
-
WDT_HIT();
if (ledcontrol) LED_A_ON();