3 `include "../../firmware/include/fpga_regs_common.v"
4 `include "../../firmware/include/fpga_regs_standard.v"
7 (input clock, input reset, input enable,
8 input wire [6:0] serial_addr, input wire [31:0] serial_data, input serial_strobe,
9 input wire [11:0] rx_a_a, input wire [11:0] rx_b_a, input wire [11:0] rx_a_b, input wire [11:0] rx_b_b,
10 output wire [31:0] rssi_0, output wire [31:0] rssi_1, output wire [31:0] rssi_2, output wire [31:0] rssi_3,
11 output reg [15:0] ddc0_in_i, output reg [15:0] ddc0_in_q,
12 output reg [15:0] ddc1_in_i, output reg [15:0] ddc1_in_q,
13 output reg [15:0] ddc2_in_i, output reg [15:0] ddc2_in_q,
14 output reg [15:0] ddc3_in_i, output reg [15:0] ddc3_in_q,
15 output wire [3:0] rx_numchan);
17 // Buffer at input to chip
18 reg [11:0] adc0,adc1,adc2,adc3;
19 always @(posedge clock)
27 // then scale and subtract dc offset
29 wire [15:0] adc0_corr,adc1_corr,adc2_corr,adc3_corr;
31 setting_reg #(`FR_DC_OFFSET_CL_EN) sr_dco_en(.clock(clock),.reset(reset),.strobe(serial_strobe),.addr(serial_addr),.in(serial_data),
34 rx_dcoffset #(`FR_ADC_OFFSET_0) rx_dcoffset0(.clock(clock),.enable(dco_en[0]),.reset(reset),.adc_in({adc0[11],adc0,3'b0}),.adc_out(adc0_corr),
35 .serial_addr(serial_addr),.serial_data(serial_data),.serial_strobe(serial_strobe));
36 rx_dcoffset #(`FR_ADC_OFFSET_1) rx_dcoffset1(.clock(clock),.enable(dco_en[1]),.reset(reset),.adc_in({adc1[11],adc1,3'b0}),.adc_out(adc1_corr),
37 .serial_addr(serial_addr),.serial_data(serial_data),.serial_strobe(serial_strobe));
38 rx_dcoffset #(`FR_ADC_OFFSET_2) rx_dcoffset2(.clock(clock),.enable(dco_en[2]),.reset(reset),.adc_in({adc2[11],adc2,3'b0}),.adc_out(adc2_corr),
39 .serial_addr(serial_addr),.serial_data(serial_data),.serial_strobe(serial_strobe));
40 rx_dcoffset #(`FR_ADC_OFFSET_3) rx_dcoffset3(.clock(clock),.enable(dco_en[3]),.reset(reset),.adc_in({adc3[11],adc3,3'b0}),.adc_out(adc3_corr),
41 .serial_addr(serial_addr),.serial_data(serial_data),.serial_strobe(serial_strobe));
43 // Level sensing for AGC
44 rssi rssi_block_0 (.clock(clock),.reset(reset),.enable(enable),.adc(adc0),.rssi(rssi_0[15:0]),.over_count(rssi_0[31:16]));
45 rssi rssi_block_1 (.clock(clock),.reset(reset),.enable(enable),.adc(adc1),.rssi(rssi_1[15:0]),.over_count(rssi_1[31:16]));
46 rssi rssi_block_2 (.clock(clock),.reset(reset),.enable(enable),.adc(adc2),.rssi(rssi_2[15:0]),.over_count(rssi_2[31:16]));
47 rssi rssi_block_3 (.clock(clock),.reset(reset),.enable(enable),.adc(adc3),.rssi(rssi_3[15:0]),.over_count(rssi_3[31:16]));
49 // And mux to the appropriate outputs
50 wire [3:0] ddc3mux,ddc2mux,ddc1mux,ddc0mux;
53 setting_reg #(`FR_RX_MUX) sr_rxmux(.clock(clock),.reset(reset),.strobe(serial_strobe),.addr(serial_addr),
54 .in(serial_data),.out({ddc3mux,ddc2mux,ddc1mux,ddc0mux,rx_realsignals,rx_numchan[3:1]}));
55 assign rx_numchan[0] = 1'b0;
57 always @(posedge clock)
59 ddc0_in_i <= #1 ddc0mux[1] ? (ddc0mux[0] ? adc3_corr : adc2_corr) : (ddc0mux[0] ? adc1_corr : adc0_corr);
60 ddc0_in_q <= #1 rx_realsignals ? 16'd0 : ddc0mux[3] ? (ddc0mux[2] ? adc3_corr : adc2_corr) : (ddc0mux[2] ? adc1_corr : adc0_corr);
61 ddc1_in_i <= #1 ddc1mux[1] ? (ddc1mux[0] ? adc3_corr : adc2_corr) : (ddc1mux[0] ? adc1_corr : adc0_corr);
62 ddc1_in_q <= #1 rx_realsignals ? 16'd0 : ddc1mux[3] ? (ddc1mux[2] ? adc3_corr : adc2_corr) : (ddc1mux[2] ? adc1_corr : adc0_corr);
63 ddc2_in_i <= #1 ddc2mux[1] ? (ddc2mux[0] ? adc3_corr : adc2_corr) : (ddc2mux[0] ? adc1_corr : adc0_corr);
64 ddc2_in_q <= #1 rx_realsignals ? 16'd0 : ddc2mux[3] ? (ddc2mux[2] ? adc3_corr : adc2_corr) : (ddc2mux[2] ? adc1_corr : adc0_corr);
65 ddc3_in_i <= #1 ddc3mux[1] ? (ddc3mux[0] ? adc3_corr : adc2_corr) : (ddc3mux[0] ? adc1_corr : adc0_corr);
66 ddc3_in_q <= #1 rx_realsignals ? 16'd0 : ddc3mux[3] ? (ddc3mux[2] ? adc3_corr : adc2_corr) : (ddc3mux[2] ? adc1_corr : adc0_corr);
69 endmodule // adc_interface