Update hitagS.c (#729)
[proxmark3-svn] / fpga / lo_passthru.v
1 //-----------------------------------------------------------------------------
2 // For reading TI tags, we need to place the FPGA in pass through mode
3 // and pass everything through to the ARM
4 //-----------------------------------------------------------------------------
5 // iZsh <izsh at fail0verflow.com>, June 2014
6
7 module lo_passthru(
8 input pck_divclk,
9 output pwr_lo, output pwr_hi,
10 output pwr_oe1, output pwr_oe2, output pwr_oe3, output pwr_oe4,
11 output adc_clk,
12 output ssp_din, input ssp_dout,
13 input cross_lo,
14 output dbg
15 );
16
17 // the antenna is modulated when ssp_dout = 1, when 0 the
18 // antenna drivers stop modulating and go into listen mode
19 assign pwr_oe3 = 1'b0;
20 assign pwr_oe1 = ssp_dout;
21 assign pwr_oe2 = ssp_dout;
22 assign pwr_oe4 = ssp_dout;
23 assign pwr_lo = pck_divclk && ssp_dout;
24 assign pwr_hi = 1'b0;
25 assign adc_clk = 1'b0;
26 assign ssp_din = cross_lo;
27 assign dbg = cross_lo;
28
29 endmodule
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