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fix hf 15 commands (#293)

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pwpiwi 2017-05-26 07:10:30 +02:00 • committed by GitHub
commit b535053a77
4 changed files with 18 additions and 13 deletions
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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];