bug fix for hf iclass reader and iclass detection

[proxmark3-svn] / fpga / hi_sniffer.v

diff --git a/fpga/hi_sniffer.v b/fpga/hi_sniffer.v
index f9d8ba93fdf2d0ceae854d7cf7e4bc4e410ce76e..3a989ce6266443e5f0a1dbc2147f13abbc889f48 100644 (file)
--- a/fpga/hi_sniffer.v
+++ b/fpga/hi_sniffer.v
@@ -1,4 +1,3 @@
-
 module hi_sniffer(
     pck0, ck_1356meg, ck_1356megb,
     pwr_lo, pwr_hi, pwr_oe1, pwr_oe2, pwr_oe3, pwr_oe4,
@@ -19,59 +18,40 @@ module hi_sniffer(
     input xcorr_is_848, snoop, xcorr_quarter_freq; // not used.
 
 // We are only snooping, all off.
-assign pwr_hi  = 1'b0;// ck_1356megb & (~snoop);
+assign pwr_hi  = 1'b0;
+assign pwr_lo  = 1'b0;
 assign pwr_oe1 = 1'b0;
 assign pwr_oe2 = 1'b0;
 assign pwr_oe3 = 1'b0;
 assign pwr_oe4 = 1'b0;
 
-reg ssp_clk = 1'b0;
 reg ssp_frame;
-reg adc_clk;
 reg [7:0] adc_d_out = 8'd0;
-reg [7:0] ssp_cnt = 8'd0;
-reg [7:0] pck_divider = 8'd0;
-reg ant_lo = 1'b0;
-reg bit_to_send = 1'b0;
-
-always @(ck_1356meg, pck0) // should synthetisize to a mux..
-  begin
-    adc_clk = ck_1356meg;
-    ssp_clk = ~ck_1356meg;
-  end
+reg [2:0] ssp_cnt = 3'd0;
 
-reg [7:0] cnt_test = 8'd0; // test
+assign adc_clk = ck_1356meg;
+assign ssp_clk = ~ck_1356meg;
 
-always @(posedge pck0)
+always @(posedge ssp_clk)
 begin
-    ant_lo <= 1'b0;
-end
+    if(ssp_cnt[2:0] == 3'd7)
+        ssp_cnt[2:0] <= 3'd0;
+    else
+        ssp_cnt <= ssp_cnt + 1;
 
-always @(posedge ssp_clk) // ~1356 (hf)
-begin
-  if(ssp_cnt[7:0] == 8'd255) // SSP counter for divides.
-    ssp_cnt[7:0] <= 8'd0;
-  else
-    ssp_cnt <= ssp_cnt + 1;
-
-      if((ssp_cnt[2:0] == 3'b000) && !ant_lo) // To set frame  length
+    if(ssp_cnt[2:0] == 3'b000) // set frame length
         begin
-          adc_d_out[7:0] = adc_d; // disable for test
-          bit_to_send = adc_d_out[0];
-          ssp_frame <= 1'b1;
+            adc_d_out[7:0] <= adc_d;
+            ssp_frame <= 1'b1;
         end
-      else
+    else
         begin
-          adc_d_out[6:0] = adc_d_out[7:1];
-          adc_d_out[7] = 1'b0; // according to old lf_read.v comment prevents gliches if not set.
-          bit_to_send = adc_d_out[0];
-          ssp_frame <= 1'b0;
+            adc_d_out[7:0] <= {1'b0, adc_d_out[7:1]};
+            ssp_frame <= 1'b0;
         end
-end
 
-assign ssp_din = bit_to_send && !ant_lo;//bit_to_send && !ant_lo; // && .. not needed i guess?
+end
 
-assign pwr_lo = ant_lo;
-      
+assign ssp_din = adc_d_out[0];
 
 endmodule