reveng - add some common use examples to -h help

[proxmark3-svn] / fpga / testbed_hi_simulate.v

`include "hi_simulate.v"

/*
	pck0			- input main 24Mhz clock (PLL / 4)
	[7:0] adc_d		- input data from A/D converter
	mod_type	- modulation type

	pwr_lo			- output to coil drivers (ssp_clk / 8)
	adc_clk			- output A/D clock signal
	ssp_frame		- output SSS frame indicator (goes high while the 8 bits are shifted)
	ssp_din			- output SSP data to ARM (shifts 8 bit A/D value serially to ARM MSB first)
	ssp_clk			- output SSP clock signal

	ck_1356meg		- input unused
	ck_1356megb		- input unused
	ssp_dout		- input unused
	cross_hi		- input unused
	cross_lo		- input unused

	pwr_hi			- output unused, tied low
	pwr_oe1			- output unused, undefined
	pwr_oe2			- output unused, undefined
	pwr_oe3			- output unused, undefined
	pwr_oe4			- output unused, undefined
	dbg				- output alias for adc_clk
*/

module testbed_hi_simulate;
	reg  pck0;
	reg  [7:0] adc_d;
	reg  mod_type;

	wire pwr_lo;
	wire adc_clk;
	reg ck_1356meg;
	reg  ck_1356megb;
	wire ssp_frame;
	wire ssp_din;
	wire ssp_clk;
	reg  ssp_dout;
	wire pwr_hi;
	wire pwr_oe1;
	wire pwr_oe2;
	wire pwr_oe3;
	wire pwr_oe4;
	wire cross_lo;
	wire cross_hi;
	wire dbg;

	hi_simulate #(5,200) dut(
	.pck0(pck0),
	.ck_1356meg(ck_1356meg),
	.ck_1356megb(ck_1356megb),
	.pwr_lo(pwr_lo),
	.pwr_hi(pwr_hi),
	.pwr_oe1(pwr_oe1),
	.pwr_oe2(pwr_oe2),
	.pwr_oe3(pwr_oe3),
	.pwr_oe4(pwr_oe4),
	.adc_d(adc_d),
	.adc_clk(adc_clk),
	.ssp_frame(ssp_frame),
	.ssp_din(ssp_din),
	.ssp_dout(ssp_dout),
	.ssp_clk(ssp_clk),
	.cross_hi(cross_hi),
	.cross_lo(cross_lo),
	.dbg(dbg),
	.mod_type(mod_type)
	);

	integer idx, i;

	// main clock
	always #5 begin 
		ck_1356megb = !ck_1356megb;
		ck_1356meg = ck_1356megb;
	end

	always begin 
		@(negedge adc_clk) ;
		adc_d = $random;
	end

	//crank DUT
	task crank_dut;
		begin
			@(negedge ssp_clk) ;
			ssp_dout = $random;
		end
	endtask

	initial begin

		// init inputs
		ck_1356megb = 0;
		// random values
		adc_d = 0;
		ssp_dout=1;

		// shallow modulation off
		mod_type=0;
		for (i = 0 ;  i < 16 ;  i = i + 1) begin
			crank_dut;
		end

		// shallow modulation on
		mod_type=1;
		for (i = 0 ;  i < 16 ;  i = i + 1) begin
			crank_dut;
		end
		$finish;
	end
	
endmodule // main