mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-09-20 23:36:31 +08:00
234 lines
8.4 KiB
Verilog
234 lines
8.4 KiB
Verilog
//-----------------------------------------------------------------------------
|
|
// Jonathan Westhues, March 2006
|
|
// iZsh <izsh at fail0verflow.com>, June 2014
|
|
// Piwi, Feb 2019
|
|
// Anon, 2019
|
|
//-----------------------------------------------------------------------------
|
|
// Defining commands, modes and options. This must be aligned to the definitions in fpgaloader.h
|
|
// Note: the definitions here are without shifts
|
|
|
|
// Commands:
|
|
`define FPGA_CMD_SET_CONFREG 1
|
|
`define FPGA_CMD_SET_DIVISOR 2
|
|
`define FPGA_CMD_SET_EDGE_DETECT_THRESHOLD 3
|
|
|
|
// Major modes:
|
|
`define FPGA_MAJOR_MODE_LF_READER 0
|
|
`define FPGA_MAJOR_MODE_LF_EDGE_DETECT 1
|
|
`define FPGA_MAJOR_MODE_LF_PASSTHRU 2
|
|
`define FPGA_MAJOR_MODE_LF_ADC 3
|
|
|
|
// Options for LF_READER
|
|
`define FPGA_LF_ADC_READER_FIELD 1
|
|
|
|
// Options for LF_EDGE_DETECT
|
|
`define FPGA_LF_EDGE_DETECT_READER_FIELD 1
|
|
`define FPGA_LF_EDGE_DETECT_TOGGLE_MODE 2
|
|
|
|
`include "lo_read.v"
|
|
`include "lo_passthru.v"
|
|
`include "lo_edge_detect.v"
|
|
`include "lo_adc.v"
|
|
`include "util.v"
|
|
`include "clk_divider.v"
|
|
|
|
module fpga_lf(
|
|
input spck, output miso, input mosi, input ncs,
|
|
input pck0, input ck_1356meg, input ck_1356megb,
|
|
output pwr_lo, output pwr_hi,
|
|
output pwr_oe1, output pwr_oe2, output pwr_oe3, output pwr_oe4,
|
|
input [7:0] adc_d, output adc_clk, output adc_noe,
|
|
output ssp_frame, output ssp_din, input ssp_dout, output ssp_clk,
|
|
input cross_hi, input cross_lo,
|
|
output dbg
|
|
);
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// The SPI receiver. This sets up the configuration word, which the rest of
|
|
// the logic looks at to determine how to connect the A/D and the coil
|
|
// drivers (i.e., which section gets it). Also assign some symbolic names
|
|
// to the configuration bits, for use below.
|
|
//-----------------------------------------------------------------------------
|
|
|
|
/*
|
|
Attempt to write up how its hooked up. Iceman 2020.
|
|
|
|
Communication between ARM / FPGA is done inside armsrc/fpgaloader.c see: function FpgaSendCommand()
|
|
Send 16 bit command / data pair to FPGA
|
|
The bit format is: C3 C2 C1 C0 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
|
|
where
|
|
C is 4bit command
|
|
D is 12bit data
|
|
|
|
shift_reg receive this 16bit frame
|
|
|
|
LF command
|
|
----------
|
|
shift_reg[15:12] == 4bit command
|
|
LF has three commands (FPGA_CMD_SET_CONFREG, FPGA_CMD_SET_DIVISOR, FPGA_CMD_SET_EDGE_DETECT_THRESHOLD)
|
|
Current commands uses only 2bits. We have room for up to 4bits of commands total (7).
|
|
|
|
LF data
|
|
-------
|
|
shift_reg[11:0] == 12bit data
|
|
lf data is divided into MAJOR MODES and configuration values.
|
|
|
|
The major modes uses 3bits (0,1,2,3,7 | 000, 001, 010, 011, 111)
|
|
000 FPGA_MAJOR_MODE_LF_READER = Act as LF reader (modulate)
|
|
001 FPGA_MAJOR_MODE_LF_EDGE_DETECT = Simulate LF
|
|
010 FPGA_MAJOR_MODE_LF_PASSTHRU = Passthrough mode, CROSS_LO line connected to SSP_DIN. SSP_DOUT logic level controls if we modulate / listening
|
|
011 FPGA_MAJOR_MODE_LF_ADC = refactor hitag2, clear ADC sampling
|
|
111 FPGA_MAJOR_MODE_OFF = turn off sampling.
|
|
|
|
Each one of this major modes can have options. Currently these two major modes uses options.
|
|
- FPGA_MAJOR_MODE_LF_READER
|
|
- FPGA_MAJOR_MODE_LF_EDGE_DETECT
|
|
|
|
FPGA_MAJOR_MODE_LF_READER
|
|
-------------------------------------
|
|
lf_field = 1bit (FPGA_LF_ADC_READER_FIELD)
|
|
|
|
You can send FPGA_CMD_SET_DIVISOR to set with FREQUENCY the fpga should sample at
|
|
divisor = 8bits shift_reg[7:0]
|
|
|
|
FPGA_MAJOR_MODE_LF_EDGE_DETECT
|
|
------------------------------------------
|
|
lf_ed_toggle_mode = 1bits
|
|
lf_ed_threshold = 8bits threshold defaults to 127
|
|
|
|
You can send FPGA_CMD_SET_EDGE_DETECT_THRESHOLD to set a custom threshold
|
|
lf_ed_threshold = 8bits threshold value.
|
|
|
|
conf_word 12bits
|
|
conf_word[8:6] = 3bit major mode.
|
|
conf_word[0] = 1bit lf_field
|
|
conf_word[1] = 1bit lf_ed_toggle_mode
|
|
conf_word[7:0] = 8bit divisor
|
|
conf_word[7:0] = 8bit threshold
|
|
|
|
-----+--------- frame layout --------------------
|
|
bit | 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
|
|
-----+-------------------------------------------
|
|
cmd | x x x x
|
|
major| x x x
|
|
opt | x x
|
|
divi | x x x x x x x x
|
|
thres| x x x x x x x x
|
|
-----+-------------------------------------------
|
|
*/
|
|
|
|
reg [15:0] shift_reg;
|
|
reg [7:0] divisor;
|
|
reg [7:0] lf_ed_threshold;
|
|
reg [11:0] conf_word;
|
|
|
|
wire [2:0] major_mode = conf_word[8:6];
|
|
wire lf_field = conf_word[0];
|
|
wire lf_ed_toggle_mode = conf_word[1];
|
|
|
|
// Handles cmd / data frame from ARM
|
|
always @(posedge ncs)
|
|
begin
|
|
// 4 bit command
|
|
case (shift_reg[15:12])
|
|
`FPGA_CMD_SET_CONFREG:
|
|
begin
|
|
// 12 bit data
|
|
conf_word <= shift_reg[11:0];
|
|
if (shift_reg[8:6] == `FPGA_MAJOR_MODE_LF_EDGE_DETECT)
|
|
begin
|
|
lf_ed_threshold <= 127; // default threshold
|
|
end
|
|
end
|
|
|
|
`FPGA_CMD_SET_DIVISOR:
|
|
divisor <= shift_reg[7:0]; // 8bits
|
|
|
|
`FPGA_CMD_SET_EDGE_DETECT_THRESHOLD:
|
|
lf_ed_threshold <= shift_reg[7:0]; // 8 bits
|
|
endcase
|
|
end
|
|
|
|
// Receive 16bits of data from ARM here.
|
|
always @(posedge spck)
|
|
begin
|
|
if (~ncs)
|
|
begin
|
|
shift_reg[15:1] <= shift_reg[14:0];
|
|
shift_reg[0] <= mosi;
|
|
end
|
|
end
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// And then we instantiate the modules corresponding to each of the FPGA's
|
|
// major modes, and use muxes to connect the outputs of the active mode to
|
|
// the output pins.
|
|
//-----------------------------------------------------------------------------
|
|
wire [7:0] pck_cnt;
|
|
wire pck_divclk;
|
|
clk_divider div_clk(pck0, divisor, pck_cnt, pck_divclk);
|
|
|
|
lo_read lr(
|
|
pck0, pck_cnt, pck_divclk,
|
|
lr_pwr_lo, lr_pwr_hi, lr_pwr_oe1, lr_pwr_oe2, lr_pwr_oe3, lr_pwr_oe4,
|
|
adc_d, lr_adc_clk,
|
|
lr_ssp_frame, lr_ssp_din, lr_ssp_clk,
|
|
lr_dbg, lf_field
|
|
);
|
|
|
|
lo_passthru lp(
|
|
pck_divclk,
|
|
lp_pwr_lo, lp_pwr_hi, lp_pwr_oe1, lp_pwr_oe2, lp_pwr_oe3, lp_pwr_oe4,
|
|
lp_adc_clk,
|
|
lp_ssp_din, ssp_dout,
|
|
cross_lo,
|
|
lp_dbg
|
|
);
|
|
|
|
lo_edge_detect le(
|
|
pck0, pck_divclk,
|
|
le_pwr_lo, le_pwr_hi, le_pwr_oe1, le_pwr_oe2, le_pwr_oe3, le_pwr_oe4,
|
|
adc_d, le_adc_clk,
|
|
le_ssp_frame, ssp_dout, le_ssp_clk,
|
|
cross_lo,
|
|
le_dbg,
|
|
lf_field,
|
|
lf_ed_toggle_mode, lf_ed_threshold
|
|
);
|
|
|
|
lo_adc la(
|
|
pck0,
|
|
la_pwr_lo, la_pwr_hi, la_pwr_oe1, la_pwr_oe2, la_pwr_oe3, la_pwr_oe4,
|
|
adc_d, la_adc_clk,
|
|
la_ssp_frame, la_ssp_din, ssp_dout, la_ssp_clk,
|
|
la_dbg, divisor,
|
|
lf_field
|
|
);
|
|
|
|
// Major modes:
|
|
// 000 -- LF reader (generic)
|
|
// 001 -- LF edge detect (generic)
|
|
// 010 -- LF passthrough
|
|
// 011 -- LF ADC (read/write)
|
|
// 100 -- unused
|
|
// 101 -- unused
|
|
// 110 -- unused
|
|
// 111 -- FPGA_MAJOR_MODE_OFF
|
|
// 000 001 010 011 100 101 110 111
|
|
mux8 mux_ssp_clk (major_mode, ssp_clk, lr_ssp_clk, le_ssp_clk, 1'b0, la_ssp_clk, 1'b0, 1'b0, 1'b0, 1'b0);
|
|
mux8 mux_ssp_din (major_mode, ssp_din, lr_ssp_din, 1'b0, lp_ssp_din, la_ssp_din, 1'b0, 1'b0, 1'b0, 1'b0);
|
|
mux8 mux_ssp_frame (major_mode, ssp_frame, lr_ssp_frame, le_ssp_frame, 1'b0, la_ssp_frame, 1'b0, 1'b0, 1'b0, 1'b0);
|
|
mux8 mux_pwr_oe1 (major_mode, pwr_oe1, lr_pwr_oe1, le_pwr_oe1, lp_pwr_oe1, la_pwr_oe1, 1'b0, 1'b0, 1'b0, 1'b0);
|
|
mux8 mux_pwr_oe2 (major_mode, pwr_oe2, lr_pwr_oe2, le_pwr_oe2, lp_pwr_oe2, la_pwr_oe2, 1'b0, 1'b0, 1'b0, 1'b0);
|
|
mux8 mux_pwr_oe3 (major_mode, pwr_oe3, lr_pwr_oe3, le_pwr_oe3, lp_pwr_oe3, la_pwr_oe3, 1'b0, 1'b0, 1'b0, 1'b0);
|
|
mux8 mux_pwr_oe4 (major_mode, pwr_oe4, lr_pwr_oe4, le_pwr_oe4, lp_pwr_oe4, la_pwr_oe4, 1'b0, 1'b0, 1'b0, 1'b0);
|
|
mux8 mux_pwr_lo (major_mode, pwr_lo, lr_pwr_lo, le_pwr_lo, lp_pwr_lo, la_pwr_lo, 1'b0, 1'b0, 1'b1, 1'b0);
|
|
mux8 mux_pwr_hi (major_mode, pwr_hi, lr_pwr_hi, le_pwr_hi, lp_pwr_hi, la_pwr_hi, 1'b0, 1'b0, 1'b0, 1'b0);
|
|
mux8 mux_adc_clk (major_mode, adc_clk, lr_adc_clk, le_adc_clk, lp_adc_clk, la_adc_clk, 1'b0, 1'b0, 1'b0, 1'b0);
|
|
mux8 mux_dbg (major_mode, dbg, lr_dbg, le_dbg, lp_dbg, la_dbg, 1'b0, 1'b0, 1'b0, 1'b0);
|
|
|
|
// In all modes, let the ADC's outputs be enabled.
|
|
assign adc_noe = 1'b0;
|
|
|
|
endmodule
|