From 5d69a524f81f234b3fbc41d49ba18d6f6886baba Mon Sep 17 00:00:00 2001
From: jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Thu, 3 Aug 2006 04:51:51 +0000
Subject: Houston, we have a trunk.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3122 221aa14e-8319-0410-a670-987f0aec2ac5
---
usrp/fpga/sdr_lib/rx_dcoffset.v | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
create mode 100644 usrp/fpga/sdr_lib/rx_dcoffset.v
(limited to 'usrp/fpga/sdr_lib/rx_dcoffset.v')
diff --git a/usrp/fpga/sdr_lib/rx_dcoffset.v b/usrp/fpga/sdr_lib/rx_dcoffset.v
new file mode 100644
index 0000000000..3be475ed60
--- /dev/null
+++ b/usrp/fpga/sdr_lib/rx_dcoffset.v
@@ -0,0 +1,22 @@
+
+
+module rx_dcoffset (input clock, input enable, input reset,
+ input signed [15:0] adc_in, output signed [15:0] adc_out,
+ input wire [6:0] serial_addr, input wire [31:0] serial_data, input serial_strobe);
+ parameter MYADDR = 0;
+
+ reg signed [31:0] integrator;
+ wire signed [15:0] scaled_integrator = integrator[31:16] + (integrator[31] & |integrator[15:0]);
+ assign adc_out = adc_in - scaled_integrator;
+
+ // FIXME do we need signed?
+ //FIXME What do we do when clipping?
+ always @(posedge clock)
+ if(reset)
+ integrator <= #1 32'd0;
+ else if(serial_strobe & (MYADDR == serial_addr))
+ integrator <= #1 {serial_data[15:0],16'd0};
+ else if(enable)
+ integrator <= #1 integrator + adc_out;
+
+endmodule // rx_dcoffset
--
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