src/edu/berkeley/slipway/demos/ExperimentUtils.java

   1 package edu.berkeley.slipway.demos;
   2
   3 import java.io.*;
   4 import java.util.*;
   5 import java.awt.*;
   6 import com.atmel.fpslic.*;
   7 import edu.berkeley.slipway.*;
   8 import edu.berkeley.slipway.gui.*;
   9 import static com.atmel.fpslic.FpslicConstants.*;
  10
  11 /** useful test structures */
  12 public class ExperimentUtils {
  13
  14     /**
  15      *  Creates a 2x2 cell frequency divider with top left corner at
  16      *  c, taking input from c.north() and providing output on the
  17      *  orthogonal axis at c.south().  Returns c.south().south() for
  18      *  easy daisy-chaining.
  19      */
  20     public static FpslicDevice.Cell divider(FpslicDevice.Cell c) {
  21         FpslicDevice.Cell detect1 = c;
  22         FpslicDevice.Cell detect2 = c.east();
  23
  24         detect1.yi(NORTH);
  25         detect1.ylut(LUT_SELF);
  26         detect1.xlut(LUT_OTHER & (~LUT_Z));
  27         detect1.c(YLUT);
  28         detect1.t(TMUX_FB);
  29         detect1.f(false);
  30         detect1.b(false);
  31
  32         detect2.xi(NW);
  33         detect2.ylut(LUT_OTHER);
  34         detect2.xlut((~LUT_SELF) & LUT_Z);
  35         detect2.c(YLUT);
  36         detect2.t(TMUX_FB);
  37         detect2.f(false);
  38         detect2.b(false);
  39
  40         detect1.south().yi(EAST);
  41         detect1.south().xi(NE);
  42         detect1.south().c(YLUT);
  43         detect1.south().t(TMUX_FB);
  44         detect1.south().f(false);
  45         detect1.south().b(false);
  46         detect1.south().ylut( (LUT_OTHER    & (~LUT_SELF)) |
  47                               ((~LUT_OTHER) &   LUT_Z)
  48                               );
  49         detect1.south().xlut( (LUT_SELF    & (~LUT_OTHER)) |
  50                               ((~LUT_SELF) &   LUT_Z)
  51                               );
  52
  53         detect2.south().yi(WEST);
  54         detect2.south().xi(NW);
  55         detect2.south().c(YLUT);
  56         detect2.south().t(TMUX_FB);
  57         detect2.south().f(false);
  58         detect2.south().b(false);
  59         detect2.south().ylut( (LUT_OTHER    & (LUT_SELF)) |
  60                               ((~LUT_OTHER) &   LUT_Z)
  61                               );
  62         detect2.south().xlut( (LUT_SELF    & (~LUT_OTHER)) |
  63                               ((~LUT_SELF) &   LUT_Z)
  64                               );
  65
  66         if (c.south().south()==null) return null;
  67         if (c.south().south().south()==null) return null;
  68         return c.south().south();
  69     }
  70
  71     /** set up the scan cell */
  72     public static void setupScanCell(FpslicDevice fpslic) {
  73         fpslic.cell(23,15).h(3, true);
  74         fpslic.cell(23,15).yi(L3);
  75         fpslic.cell(23,15).ylut(0xAA);
  76         fpslic.iob_right(15, true).enableOutput(WEST);
  77
  78         fpslic.cell(23,0).ylut(0x00);
  79         fpslic.iob_right(0, true).enableOutput(WEST);
  80         fpslic.flush();
  81     }
  82
  83 }