static void rad1o_ui_set_sample_rate(uint32_t sample_rate) {
hackrf_ui_setSampleRate(sample_rate);
}
bool sample_rate_frac_set(uint32_t rate_num, uint32_t rate_denom)
{
const uint64_t VCO_FREQ = 800 * 1000 * 1000; /* 800 MHz */
uint32_t MSx_P1,MSx_P2,MSx_P3;
uint32_t a, b, c;
uint32_t rem;
hackrf_ui_setSampleRate(rate_num/2);
/* Find best config */
a = (VCO_FREQ * rate_denom) / rate_num;
rem = (VCO_FREQ * rate_denom) - (a * rate_num);
if (!rem) {
/* Integer mode */
b = 0;
c = 1;
} else {
/* Fractional */
uint32_t g = gcd(rem, rate_num);
rem /= g;
rate_num /= g;
if (rate_num < (1<<20)) {
/* Perfect match */
b = rem;
c = rate_num;
} else {
/* Approximate */
c = (1<<20) - 1;
b = ((uint64_t)c * (uint64_t)rem) / rate_num;
g = gcd(b, c);
b /= g;
c /= g;
}
}
/* Can we enable integer mode ? */
if (a & 0x1 || b)
si5351c_set_int_mode(&clock_gen, 0, 0);
else
si5351c_set_int_mode(&clock_gen, 0, 1);
/* Final MS values */
MSx_P1 = 128*a + (128 * b/c) - 512;
MSx_P2 = (128*b) % c;
MSx_P3 = c;
/* MS0/CLK0 is the source for the MAX5864/CPLD (CODEC_CLK). */
si5351c_configure_multisynth(&clock_gen, 0, MSx_P1, MSx_P2, MSx_P3, 1);
/* MS0/CLK1 is the source for the CPLD (CODEC_X2_CLK). */
si5351c_configure_multisynth(&clock_gen, 1, 0, 0, 0, 0);//p1 doesn't matter
/* MS0/CLK2 is the source for SGPIO (CODEC_X2_CLK) */
si5351c_configure_multisynth(&clock_gen, 2, 0, 0, 0, 0);//p1 doesn't matter
return true;
}
