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| author | jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5> | 2006-08-03 04:51:51 +0000 |
|---|---|---|
| committer | jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5> | 2006-08-03 04:51:51 +0000 |
| commit | 5d69a524f81f234b3fbc41d49ba18d6f6886baba (patch) | |
| tree | b71312bf7f1e8d10fef0f3ac6f28784065e73e72 /usrp/fpga/sdr_lib/rssi.v | |
Houston, we have a trunk.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3122 221aa14e-8319-0410-a670-987f0aec2ac5
Diffstat (limited to 'usrp/fpga/sdr_lib/rssi.v')
| -rw-r--r-- | usrp/fpga/sdr_lib/rssi.v | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/usrp/fpga/sdr_lib/rssi.v b/usrp/fpga/sdr_lib/rssi.v new file mode 100644 index 0000000000..e45e2148c9 --- /dev/null +++ b/usrp/fpga/sdr_lib/rssi.v @@ -0,0 +1,30 @@ + + +module rssi (input clock, input reset, input enable, + input [11:0] adc, output [15:0] rssi, output [15:0] over_count); + + wire over_hi = (adc == 12'h7FF); + wire over_lo = (adc == 12'h800); + wire over = over_hi | over_lo; + + reg [25:0] over_count_int; + always @(posedge clock) + if(reset | ~enable) + over_count_int <= #1 26'd0; + else + over_count_int <= #1 over_count_int + (over ? 26'd65535 : 26'd0) - over_count_int[25:10]; + + assign over_count = over_count_int[25:10]; + + wire [11:0] abs_adc = adc[11] ? ~adc : adc; + + reg [25:0] rssi_int; + always @(posedge clock) + if(reset | ~enable) + rssi_int <= #1 26'd0; + else + rssi_int <= #1 rssi_int + abs_adc - rssi_int[25:10]; + + assign rssi = rssi_int[25:10]; + +endmodule // rssi |