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-
-module adc_model
- (input clk, input rst,
- output [13:0] adc_a,
- output adc_ovf_a,
- input adc_on_a,
- input adc_oe_a,
- output [13:0] adc_b,
- output adc_ovf_b,
- input adc_on_b,
- input adc_oe_b
- );
-
- math_real math ( ) ;
-
- reg [13:0] adc_a_int = 0;
- reg [13:0] adc_b_int = 0;
-
- assign adc_a = adc_oe_a ? adc_a_int : 14'bz;
- assign adc_ovf_a = adc_oe_a ? 1'b0 : 1'bz;
- assign adc_b = adc_oe_b ? adc_b_int : 14'bz;
- assign adc_ovf_b = adc_oe_b ? 1'b0 : 1'bz;
-
- real phase = 0;
- real freq = 330000/100000000;
-
- real scale = 8190; // math.pow(2,13)-2;
- always @(posedge clk)
- if(rst)
- begin
- adc_a_int <= 0;
- adc_b_int <= 0;
- end
- else
- begin
- if(adc_on_a)
- //adc_a_int <= $rtoi(math.round(math.sin(phase*math.MATH_2_PI)*scale)) ;
- adc_a_int <= adc_a_int + 3;
- if(adc_on_b)
- adc_b_int <= adc_b_int - 7;
- //adc_b_int <= $rtoi(math.round(math.cos(phase*math.MATH_2_PI)*scale)) ;
- if(phase > 1)
- phase <= phase + freq - 1;
- else
- phase <= phase + freq;
- end
-
-endmodule // adc_model