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autoload Cairo;
import Cairo;
library "examples/sort.5c";
import Sort;
int width = 1000, height = 200;
int min = 0xffffffff;
int max = 0;
int max_clocks = 1000;
int[4][max_clocks] clocks;
int[4] clock_count = {0...};
int[4] p2vals = {5,10,7,14};
cairo_t cr = Cairo::new(width, height);
void calc_p2(int p2i)
{
int p2 = p2vals[p2i];
int min_p, max_p;
clocks[p2i] = (int [max_clocks]){0...};
if (p2 == 7 || p2 == 14) {
/* LVDS */
min_p = 7;
max_p = 98;
} else {
/* SDVO/DAC */
min_p = 5;
max_p = 80;
}
for (int m1 = 10; m1 <= 20; m1++) {
for (int m2 = 5; m2 <= 9; m2++) {
for (int n = 3; n <= 8; n++) {
for (int p1 = 1; p1 <= 8; p1++) {
int ref = 96000000;
int m = 5 * (m1 + 2) + (m2 + 2);
int p = p1 * p2;
int vco = floor(ref * m / (n + 2));
int clock = floor(vco / p);
if (p < min_p || p > max_p)
continue;
if (m < 70 || m > 120)
continue;
if (m2 > m1)
continue; /* won't happen */
if (vco < 1400000000 ||
vco > 2800000000)
continue;
/*
printf("clock: %d (%d,%d), %d, "
"(%d,%d)\n",
floor(clock / 1000),
m1, m2, n, p1, p2);
*/
clocks[p2i][clock_count[p2i]] = clock;
clock_count[p2i]++;
}
}
}
}
}
bool sort_p2(poly a, poly b)
{
return a > b;
}
int min_rate = 25000 * 1000;
int max_rate = 200000 * 1000;
real scale_x(real clock)
{
int min_x = 75, max_x = width - 50;
real frac = (clock - min_rate) / (max_rate - min_rate);
return min_x + frac * (max_x - min_x);
}
for (p2i = 0; p2i < dim(p2vals); p2i++) {
int p2 = p2vals[p2i];
calc_p2(p2i);
/*qsort(&p2vals[p2i], sort_p2);*/
switch (p2) {
case 5:
set_source_rgb(cr, 1,0,0);
break;
case 10:
set_source_rgb(cr, 0,1,0);
break;
case 7:
set_source_rgb(cr, 0,0,1);
break;
case 14:
set_source_rgb(cr, 0,0,0);
break;
}
for (int i = 0; i < clock_count[p2i]; i++) {
int clock = clocks[p2i][i];
real xpos;
if (clock < min_rate || clock > max_rate)
continue;
xpos = scale_x(clock);
move_to(cr, xpos, p2i / (dim(p2vals) + 1) * height);
line_to(cr, xpos, (p2i + 1) / (dim(p2vals) + 1) * height);
stroke(cr);
}
set_source_rgb(cr, 0, 0, 0);
string p2label = sprintf("p2 = %d", p2);
move_to(cr, 5, (p2i + .5) / (dim(p2vals) + 1) * height + 4);
show_text(cr, p2label);
}
void label_clock(real clock) {
real center_x = scale_x(clock);
string label = sprintf("%d", floor((clock + 500) / 1000000));
text_extents_t e = text_extents(cr, label);
real left_x = center_x - e.x_advance / 2;
save(cr);
move_to(cr, left_x, height - 20);
show_text(cr, label);
restore(cr);
}
label_clock(min_rate);
label_clock(max_rate);
label_clock(140 * 1000 * 1000);
label_clock(115 * 1000 * 1000);
label_clock(100 * 1000 * 1000);
label_clock(82 * 1000 * 1000);
string xlabel = "Clock in Mhz";
text_extents_t e = text_extents(cr, xlabel);
move_to(cr, width / 2 - e.x_advance / 2, height - 5);
show_text(cr, xlabel);
sleep(10);
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