#include <stdio.h>
#include <stdint.h>

#define FREF 24000000UL

#define NR_MIN 1UL
#define NR_MAX (FREF/300000)

#define NF_MIN 1U
#define NF_MAX (1<<12)

#define OD_MIN 1UL
#define OD_MAX (1<<3)

#define CODEC_DIV_MIN 1UL
#define CODEC_DIV_MAX (1<<4)

int main(int argc, char **argv)
{
    uint32_t nr, nf, od, cd;
    unsigned long fout;

    fout = strtoul(argv[1], NULL, 0);

    printf("FREF: %ldHz FOUT: %ldHz    NR_MIN: %ld    NR_MAX: %ld\n", FREF, fout, NR_MIN, NR_MAX);
for (cd = CODEC_DIV_MIN; cd < CODEC_DIV_MAX; cd++)
    for (od = OD_MIN; od < OD_MAX; od++)
        for (nr = NR_MIN; nr < NR_MAX; nr++)
            for (nf = NF_MIN; nf < NF_MAX; nf++)
                if ( (((FREF/nr)*nf)/od)/cd == fout )
                    if ( FREF/nr < 600000000 && FREF/nr > 300000 )
                        if ((FREF/nr)*nf > 120000000 && (FREF/nr)*nf < 600000000)
                            printf("NR: %d, NF: %d, OD: %d, CD: %d    FREF/nr: %ld, VCO: %ld\n",
                                   nr, nf, od, cd, FREF/nr, (FREF/nr)*nf);
    return 0;
}