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fix hf 15 commands (#293)

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This commit is contained in:
pwpiwi 2017-05-26 07:10:30 +02:00 committed by GitHub
parent a5eb7820a5
commit b535053a77
4 changed files with 18 additions and 13 deletions
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1
armsrc/fpgaloader.h
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@ -58,7 +58,6 @@ void SetAdcMuxFor(uint32_t whichGpio);
// Options for the HF reader, correlating against rx from tag
#define FPGA_HF_READER_RX_XCORR_848_KHZ (1<<0)
#define FPGA_HF_READER_RX_XCORR_SNOOP (1<<1)
#define FPGA_HF_READER_RX_XCORR_QUARTER_FREQ (1<<2)
// Options for the HF simulated tag, how to modulate
#define FPGA_HF_SIMULATOR_NO_MODULATION (0<<0)
#define FPGA_HF_SIMULATOR_MODULATE_BPSK (1<<0)

12
armsrc/iso15693.c
View file

@ -319,7 +319,7 @@ static int GetIso15693AnswerFromTag(uint8_t *receivedResponse, int maxLen, int *
// every other is Q. We just want power, so abs(I) + abs(Q) is
// close to what we want.
if(getNext) {
int8_t r = ABS(b) + ABS(prev);
uint8_t r = ABS(b) + ABS(prev);
dest[c++] = (uint8_t)r;
@ -356,7 +356,7 @@ static int GetIso15693AnswerFromTag(uint8_t *receivedResponse, int maxLen, int *
maxPos = i;
}
}
// DbpString("SOF at %d, correlation %d", maxPos,max/(arraylen(FrameSOF)/skip));
// Dbprintf("SOF at %d, correlation %d", maxPos,max/(arraylen(FrameSOF)/skip));
int k = 0; // this will be our return value
@ -385,7 +385,7 @@ static int GetIso15693AnswerFromTag(uint8_t *receivedResponse, int maxLen, int *
corr1 *= 4;
if(corrEOF > corr1 && corrEOF > corr0) {
// DbpString("EOF at %d", i);
// Dbprintf("EOF at %d", i);
break;
} else if(corr1 > corr0) {
i += arraylen(Logic1)/skip;
@ -457,7 +457,7 @@ static int GetIso15693AnswerFromSniff(uint8_t *receivedResponse, int maxLen, int
// every other is Q. We just want power, so abs(I) + abs(Q) is
// close to what we want.
if(getNext) {
int8_t r = ABS(b) + ABS(prev);
uint8_t r = ABS(b) + ABS(prev);
dest[c++] = (uint8_t)r;
@ -626,7 +626,7 @@ void AcquireRawAdcSamplesIso15693(void)
// every other is Q. We just want power, so abs(I) + abs(Q) is
// close to what we want.
if(getNext) {
int8_t r = ABS(b) + ABS(prev);
uint8_t r = ABS(b) + ABS(prev);
dest[c++] = (uint8_t)r;
@ -680,7 +680,7 @@ void RecordRawAdcSamplesIso15693(void)
// every other is Q. We just want power, so abs(I) + abs(Q) is
// close to what we want.
if(getNext) {
int8_t r = ABS(b) + ABS(prev);
uint8_t r = ABS(b) + ABS(prev);
dest[c++] = (uint8_t)r;

BIN
fpga/fpga_hf.bit
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Binary file not shown.

18
fpga/hi_read_rx_xcorr.v
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@ -28,11 +28,18 @@ assign pwr_oe1 = 1'b0;
assign pwr_oe3 = 1'b0;
assign pwr_oe4 = 1'b0;
wire adc_clk = ck_1356megb;
reg fc_div_2;
// Clock divider
reg [0:0] fc_divider;
always @(negedge ck_1356megb)
fc_div_2 <= fc_div_2 + 1;
fc_divider <= fc_divider + 1;
wire fc_div2 = fc_divider[0];
reg adc_clk;
always @(ck_1356megb)
if (xcorr_is_848)
adc_clk <= ck_1356megb;
else
adc_clk <= fc_div2;
// When we're a reader, we just need to do the BPSK demod; but when we're an
// eavesdropper, we also need to pick out the commands sent by the reader,
@ -77,7 +84,6 @@ reg ssp_frame;
always @(negedge adc_clk)
begin
if (xcorr_is_848 | fc_div_2)
corr_i_cnt <= corr_i_cnt + 1;
end
@ -137,7 +143,7 @@ begin
begin
ssp_clk <= 1'b1;
// Don't shift if we just loaded new data, obviously.
if(corr_i_cnt != 7'd0)
if(corr_i_cnt != 6'd0)
begin
corr_i_out[7:0] <= {corr_i_out[6:0], corr_q_out[7]};
corr_q_out[7:1] <= corr_q_out[6:0];