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iso15: fpga: add support for 2SC in READER_MODE_RECEIVE_AMPLITUDE

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FPGA_HF_READER_MODE_RECEIVE_AMPLITUDE | FPGA_HF_READER_2SUBCARRIERS_424_484_KHZ
flags will return 2 fsk bits (same ones as in sniffing mode: '10' =>
424kHz, '01' => 484kHz, '11' => unknown signal and '00' for no signal
received) in addition to the signal amplitude (on 14 bits) on 424kHz.
This commit is contained in:
Yann GASCUEL 2022-03-16 15:04:07 +01:00
parent 352850d158
commit 6fb74b976f
2 changed files with 14 additions and 5 deletions
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fpga-xc2s30/fpga_hf_15.bit
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19
fpga-xc2s30/hi_reader_15.v
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@ -245,11 +245,11 @@ begin
if (minor_mode == `FPGA_HF_READER_MODE_SNIFF_AMPLITUDE)
begin
if (subcarrier_frequency == `FPGA_HF_READER_2SUBCARRIERS_424_484_KHZ)
begin
begin
// send amplitude + 2 bits fsk (2sc) signal + 2 bits reader signal
corr_i_out <= corr_amplitude[13:6];
corr_q_out <= {corr_amplitude[5:2], fskout, after_hysteresis_prev_prev, after_hysteresis_prev};
end
end
else
begin
// send amplitude plus 2 bits reader signal
@ -279,9 +279,18 @@ begin
end
else if (minor_mode == `FPGA_HF_READER_MODE_RECEIVE_AMPLITUDE)
begin
// send amplitude
corr_i_out <= {2'b00, corr_amplitude[13:8]};
corr_q_out <= corr_amplitude[7:0];
if (subcarrier_frequency == `FPGA_HF_READER_2SUBCARRIERS_424_484_KHZ)
begin
// send 2 bits fsk (2sc) signal + amplitude
corr_i_out <= {fskout, corr_amplitude[13:8]};
corr_q_out <= corr_amplitude[7:0];
end
else
begin
// send amplitude
corr_i_out <= {2'b00, corr_amplitude[13:8]};
corr_q_out <= corr_amplitude[7:0];
end
end
else if (minor_mode == `FPGA_HF_READER_MODE_RECEIVE_IQ)
begin