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implement 'hf iclass snoop -j'

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* fix long option --jam
* make room for one more bit for FPGA minor mode
* new mode FPGA_HF_READER_MODE_SEND_JAM
* implement jamming in Handle15693SampleFromReader
This commit is contained in:
pwpiwi 2019-11-13 16:42:29 +01:00
commit cd028159be
13 changed files with 116 additions and 68 deletions
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17
fpga/fpga_lf.v
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@ -29,17 +29,18 @@ module fpga_lf(
reg [15:0] shift_reg;
reg [7:0] divisor;
reg [7:0] conf_word;
reg [8:0] conf_word;
reg [7:0] user_byte1;
always @(posedge ncs)
begin
case(shift_reg[15:12])
4'b0001:
case (shift_reg[15:12])
4'b0001: // FPGA_CMD_SET_CONFREG
begin
conf_word <= shift_reg[7:0];
if (shift_reg[7:0] == 8'b00000001) begin // LF edge detect
user_byte1 <= 127; // default threshold
conf_word <= shift_reg[8:0];
if (shift_reg[8:0] == 9'b000000001)
begin // LF edge detect
user_byte1 <= 127; // default threshold
end
end
4'b0010: divisor <= shift_reg[7:0]; // FPGA_CMD_SET_DIVISOR
@ -49,14 +50,14 @@ end
always @(posedge spck)
begin
if(~ncs)
if (~ncs)
begin
shift_reg[15:1] <= shift_reg[14:0];
shift_reg[0] <= mosi;
end
end
wire [2:0] major_mode = conf_word[7:5];
wire [2:0] major_mode = conf_word[8:6];
// For the low-frequency configuration:
wire lf_field = conf_word[0];