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#!/usr/bin/perl -w
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2
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3
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use strict;
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4
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5
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sub pll_fvco($$$$) {
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6
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my ($fosc, $z, $x, $y) = @_;
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return $fosc * ($z + ($x/$y));
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}
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10
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sub pll_flo($$) {
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my ($fvco, $r_num) = @_;
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return $fvco / $r_num;
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}
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sub is_flo_valid($) {
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my $flo = shift;
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if ($flo < 64000000 || $flo > 1700000000) {
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return 0;
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}
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return 1;
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}
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26
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sub min_vco_mult($) {
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my ($fosc) = @_;
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return (2600000000 / $fosc);
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}
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sub max_vco_mult($) {
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my ($fosc) = @_;
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return (3900000000 / $fosc);
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}
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sub test_setting($$$$$) {
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my ($fosc, $z, $x, $y, $r) = @_;
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my $flo;
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my $fvco = pll_fvco($fosc, $z, $x, $y);
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if ($fvco < 2600000000 || $fvco > 3900000000) {
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return;
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}
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$flo = pll_flo($fvco, $r);
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if (is_flo_valid($flo)) {
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printf("%010u Hz (Z=%u, X=%u, R=%u)\n", $flo, $z, $x, $r);
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}
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50
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$r = $r * 2;
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$flo = pll_flo($fvco, $r);
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if (is_flo_valid($flo) && $flo < 300000000) {
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printf("%010u Hz (Z=%u, X=%u, R=%u, TPM)\n", $flo, $z, $x, $r);
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}
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}
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sub hr() {
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printf("======================================================================\n");
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}
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my $fosc = 26000000;
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64
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my $y = 65535;
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my @r_int_vals = (2,4,6,8,12,16,20,24);
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66
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67
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my $min_vco_mult = min_vco_mult($fosc);
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my $max_vco_mult = max_vco_mult($fosc);
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printf("Fosc = %u, min_vco_mult=%u, max_vco_mult=%u\n", $fosc,
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$min_vco_mult, $max_vco_mult);
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for (my $z = $min_vco_mult; $z <= $max_vco_mult; $z++) {
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for (my $x = 0; $x <= 0xffff; $x+= 1) {
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foreach my $r (@r_int_vals) {
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test_setting($fosc, $z, $x, $y, $r);
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}
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}
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}
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