fpga/testbed_hi_simulate.v

   1 `include "hi_simulate.v"
   2
   3 /*
   4         pck0                    - input main 24Mhz clock (PLL / 4)
   5         [7:0] adc_d             - input data from A/D converter
   6         mod_type        - modulation type
   7
   8         pwr_lo                  - output to coil drivers (ssp_clk / 8)
   9         adc_clk                 - output A/D clock signal
  10         ssp_frame               - output SSS frame indicator (goes high while the 8 bits are shifted)
  11         ssp_din                 - output SSP data to ARM (shifts 8 bit A/D value serially to ARM MSB first)
  12         ssp_clk                 - output SSP clock signal
  13
  14         ck_1356meg              - input unused
  15         ck_1356megb             - input unused
  16         ssp_dout                - input unused
  17         cross_hi                - input unused
  18         cross_lo                - input unused
  19
  20         pwr_hi                  - output unused, tied low
  21         pwr_oe1                 - output unused, undefined
  22         pwr_oe2                 - output unused, undefined
  23         pwr_oe3                 - output unused, undefined
  24         pwr_oe4                 - output unused, undefined
  25         dbg                             - output alias for adc_clk
  26 */
  27
  28 module testbed_hi_simulate;
  29         reg  pck0;
  30         reg  [7:0] adc_d;
  31         reg  mod_type;
  32
  33         wire pwr_lo;
  34         wire adc_clk;
  35         reg ck_1356meg;
  36         reg  ck_1356megb;
  37         wire ssp_frame;
  38         wire ssp_din;
  39         wire ssp_clk;
  40         reg  ssp_dout;
  41         wire pwr_hi;
  42         wire pwr_oe1;
  43         wire pwr_oe2;
  44         wire pwr_oe3;
  45         wire pwr_oe4;
  46         wire cross_lo;
  47         wire cross_hi;
  48         wire dbg;
  49
  50         hi_simulate #(5,200) dut(
  51         .pck0(pck0),
  52         .ck_1356meg(ck_1356meg),
  53         .ck_1356megb(ck_1356megb),
  54         .pwr_lo(pwr_lo),
  55         .pwr_hi(pwr_hi),
  56         .pwr_oe1(pwr_oe1),
  57         .pwr_oe2(pwr_oe2),
  58         .pwr_oe3(pwr_oe3),
  59         .pwr_oe4(pwr_oe4),
  60         .adc_d(adc_d),
  61         .adc_clk(adc_clk),
  62         .ssp_frame(ssp_frame),
  63         .ssp_din(ssp_din),
  64         .ssp_dout(ssp_dout),
  65         .ssp_clk(ssp_clk),
  66         .cross_hi(cross_hi),
  67         .cross_lo(cross_lo),
  68         .dbg(dbg),
  69         .mod_type(mod_type)
  70         );
  71
  72         integer idx, i;
  73
  74         // main clock
  75         always #5 begin
  76                 ck_1356megb = !ck_1356megb;
  77                 ck_1356meg = ck_1356megb;
  78         end
  79
  80         always begin
  81                 @(negedge adc_clk) ;
  82                 adc_d = $random;
  83         end
  84
  85         //crank DUT
  86         task crank_dut;
  87                 begin
  88                         @(negedge ssp_clk) ;
  89                         ssp_dout = $random;
  90                 end
  91         endtask
  92
  93         initial begin
  94
  95                 // init inputs
  96                 ck_1356megb = 0;
  97                 // random values
  98                 adc_d = 0;
  99                 ssp_dout=1;
 100
 101                 // shallow modulation off
 102                 mod_type=0;
 103                 for (i = 0 ;  i < 16 ;  i = i + 1) begin
 104                         crank_dut;
 105                 end
 106
 107                 // shallow modulation on
 108                 mod_type=1;
 109                 for (i = 0 ;  i < 16 ;  i = i + 1) begin
 110                         crank_dut;
 111                 end
 112                 $finish;
 113         end
 114
 115 endmodule // main
 116