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fgpa changes from official repo. Had to split felica into its own image. Leading to three bit files created.

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iceman1001 2020-07-02 11:47:46 +02:00
commit 8df14408b8
7 changed files with 191 additions and 203 deletions
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57
fpga/hi_iso14443a.v
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@ -3,31 +3,22 @@
// Gerhard de Koning Gans, April 2008
//-----------------------------------------------------------------------------
// constants for the different modes:
`define SNIFFER 3'b000
`define TAGSIM_LISTEN 3'b001
`define TAGSIM_MOD 3'b010
`define READER_LISTEN 3'b011
`define READER_MOD 3'b100
module hi_iso14443a(
pck0, ck_1356meg, ck_1356megb,
ck_1356meg,
pwr_lo, pwr_hi, pwr_oe1, pwr_oe2, pwr_oe3, pwr_oe4,
adc_d, adc_clk,
ssp_frame, ssp_din, ssp_dout, ssp_clk,
cross_hi, cross_lo,
dbg,
mod_type
);
input pck0, ck_1356meg, ck_1356megb;
input ck_1356meg;
output pwr_lo, pwr_hi, pwr_oe1, pwr_oe2, pwr_oe3, pwr_oe4;
input [7:0] adc_d;
output adc_clk;
input ssp_dout;
output ssp_frame, ssp_din, ssp_clk;
input cross_hi, cross_lo;
output dbg;
input [2:0] mod_type;
input [3:0] mod_type;
wire adc_clk = ck_1356meg;
@ -151,7 +142,7 @@ begin
end
// adjust internal timer counter if necessary:
if (negedge_cnt[3:0] == 4'd13 && (mod_type == `SNIFFER || mod_type == `TAGSIM_LISTEN) && deep_modulation)
if (negedge_cnt[3:0] == 4'd13 && (mod_type == `FPGA_HF_ISO14443A_SNIFFER || mod_type == `FPGA_HF_ISO14443A_TAGSIM_LISTEN) && deep_modulation)
begin
if (reader_falling_edge_time == 4'd1) // reader signal changes right after sampling. Better sample earlier next time.
begin
@ -185,7 +176,7 @@ reg [3:0] mod_detect_reset_time;
always @(negedge adc_clk)
begin
if (mod_type == `READER_LISTEN)
if (mod_type == `FPGA_HF_ISO14443A_READER_LISTEN)
// (our) reader signal changes at negedge_cnt[3:0]=9, tag response expected to start n*16+4 ticks later, further delayed by
// 3 ticks ADC conversion. The maximum filter output (edge detected) will be detected after subcarrier zero crossing (+7 ticks).
// To allow some timing variances, we want to have the maximum filter outputs well within the detection window, i.e.
@ -195,7 +186,7 @@ begin
mod_detect_reset_time <= 4'd4;
end
else
if (mod_type == `SNIFFER)
if (mod_type == `FPGA_HF_ISO14443A_SNIFFER)
begin
// detect a rising edge of reader's signal and sync modulation detector to the tag's answer:
if (~pre_after_hysteresis && after_hysteresis && deep_modulation)
@ -320,7 +311,7 @@ reg [3:0] sub_carrier_cnt;
// response window of 1128 - 774 = 354 ticks.
// reset on a pause in listen mode. I.e. the counter starts when the pause is over:
assign fdt_reset = ~after_hysteresis && mod_type == `TAGSIM_LISTEN;
assign fdt_reset = ~after_hysteresis && mod_type == `FPGA_HF_ISO14443A_TAGSIM_LISTEN;
always @(negedge adc_clk)
begin
@ -363,7 +354,7 @@ reg mod_sig_coil;
always @(negedge adc_clk)
begin
if (mod_type == `TAGSIM_MOD) // need to take care of proper fdt timing
if (mod_type == `FPGA_HF_ISO14443A_TAGSIM_MOD) // need to take care of proper fdt timing
begin
if(fdt_counter == `FDT_COUNT)
begin
@ -438,7 +429,7 @@ always @(negedge adc_clk)
begin
if (negedge_cnt[5:0] == 6'd63) // fill the buffer
begin
if (mod_type == `SNIFFER)
if (mod_type == `FPGA_HF_ISO14443A_SNIFFER)
begin
if(deep_modulation) // a reader is sending (or there's no field at all)
begin
@ -455,7 +446,7 @@ begin
end
end
if(negedge_cnt[2:0] == 3'b000 && mod_type == `SNIFFER) // shift at double speed
if(negedge_cnt[2:0] == 3'b000 && mod_type == `FPGA_HF_ISO14443A_SNIFFER) // shift at double speed
begin
// Don't shift if we just loaded new data, obviously.
if(negedge_cnt[5:0] != 6'd0)
@ -464,7 +455,7 @@ begin
end
end
if(negedge_cnt[3:0] == 4'b0000 && mod_type != `SNIFFER)
if(negedge_cnt[3:0] == 4'b0000 && mod_type != `FPGA_HF_ISO14443A_SNIFFER)
begin
// Don't shift if we just loaded new data, obviously.
if(negedge_cnt[6:0] != 7'd0)
@ -484,8 +475,8 @@ reg ssp_frame;
always @(negedge adc_clk)
begin
if(mod_type == `SNIFFER)
// SNIFFER mode (ssp_clk = adc_clk / 8, ssp_frame clock = adc_clk / 64)):
if(mod_type == `FPGA_HF_ISO14443A_SNIFFER)
// FPGA_HF_ISO14443A_SNIFFER mode (ssp_clk = adc_clk / 8, ssp_frame clock = adc_clk / 64)):
begin
if(negedge_cnt[2:0] == 3'd0)
ssp_clk <= 1'b1;
@ -505,7 +496,7 @@ begin
if(negedge_cnt[3:0] == 4'd8)
ssp_clk <= 1'b0;
if(negedge_cnt[6:0] == 7'd7) // ssp_frame rising edge indicates start of frame
if(negedge_cnt[6:0] == 7'd7) // ssp_frame rising edge indicates start of frame, sampled on falling edge of ssp_clk
ssp_frame <= 1'b1;
if(negedge_cnt[6:0] == 7'd23)
ssp_frame <= 1'b0;
@ -525,23 +516,23 @@ begin
if(negedge_cnt[3:0] == 4'd0)
begin
// What do we communicate to the ARM
if(mod_type == `TAGSIM_LISTEN)
if(mod_type == `FPGA_HF_ISO14443A_TAGSIM_LISTEN)
sendbit = after_hysteresis;
else if(mod_type == `TAGSIM_MOD)
else if(mod_type == `FPGA_HF_ISO14443A_TAGSIM_MOD)
/* if(fdt_counter > 11'd772) sendbit = mod_sig_coil; // huh?
else */
sendbit = fdt_indicator;
else if (mod_type == `READER_LISTEN)
else if (mod_type == `FPGA_HF_ISO14443A_READER_LISTEN)
sendbit = curbit;
else
sendbit = 1'b0;
end
if(mod_type == `SNIFFER)
if(mod_type == `FPGA_HF_ISO14443A_SNIFFER)
// send sampled reader and tag data:
bit_to_arm = to_arm[7];
else if (mod_type == `TAGSIM_MOD && fdt_elapsed && temp_buffer_reset)
else if (mod_type == `FPGA_HF_ISO14443A_TAGSIM_MOD && fdt_elapsed && temp_buffer_reset)
// send timing information:
bit_to_arm = to_arm[7];
else
@ -554,22 +545,22 @@ end
assign ssp_din = bit_to_arm;
// Subcarrier (adc_clk/16, for TAGSIM_MOD only).
// Subcarrier (adc_clk/16, for FPGA_HF_ISO14443A_TAGSIM_MOD only).
wire sub_carrier;
assign sub_carrier = ~sub_carrier_cnt[3];
// in READER_MOD: drop carrier for mod_sig_coil==1 (pause); in READER_LISTEN: carrier always on; in other modes: carrier always off
assign pwr_hi = (ck_1356megb & (((mod_type == `READER_MOD) & ~mod_sig_coil) || (mod_type == `READER_LISTEN)));
// in FPGA_HF_ISO14443A_READER_MOD: drop carrier for mod_sig_coil==1 (pause); in FPGA_HF_ISO14443A_READER_LISTEN: carrier always on; in other modes: carrier always off
assign pwr_hi = (ck_1356meg & (((mod_type == `FPGA_HF_ISO14443A_READER_MOD) & ~mod_sig_coil) || (mod_type == `FPGA_HF_ISO14443A_READER_LISTEN)));
// Enable HF antenna drivers:
assign pwr_oe1 = 1'b0;
assign pwr_oe3 = 1'b0;
// TAGSIM_MOD: short circuit antenna with different resistances (modulated by sub_carrier modulated by mod_sig_coil)
// FPGA_HF_ISO14443A_TAGSIM_MOD: short circuit antenna with different resistances (modulated by sub_carrier modulated by mod_sig_coil)
// for pwr_oe4 = 1 (tristate): antenna load = 10k || 33 = 32,9 Ohms
// for pwr_oe4 = 0 (active): antenna load = 10k || 33 || 33 = 16,5 Ohms
assign pwr_oe4 = mod_sig_coil & sub_carrier & (mod_type == `TAGSIM_MOD);
assign pwr_oe4 = mod_sig_coil & sub_carrier & (mod_type == `FPGA_HF_ISO14443A_TAGSIM_MOD);
// This is all LF, so doesn't matter.
assign pwr_oe2 = 1'b0;