Bitcoin Forum

static void anu_find_freqhex(void)
{
	float fout, best_fout = opt_anu_freq;
	int od, nf, nr, no, n, m, bs;
	float best_diff = 1000;

	anu_freqfound = true;

	for (od = 0; od < 4; od++) {
		no = 1 << od;
		for (n = 0; n < 16; n++) {
			nr = n + 1;
			for (m = 0; m < 64; m++) {
				nf = m + 1;
				fout = 25 * (float)nf /((float)(nr) * (float)(no));
				if (fabsf(fout - opt_anu_freq)  > best_diff)
					continue;
				if (500 <= (fout * no) && (fout * no) <= 1000)
					bs = 1;
				else
					bs = 0;
				best_diff = fabsf(fout - opt_anu_freq);
				best_fout = fout;
				anu_freq_hex = (bs << 14) | (m << 7) | (n << 2) | od;
				if (fout == opt_anu_freq) {
					applog(LOG_DEBUG, "ANU found exact frequency %.1f with hex %04x",
					       opt_anu_freq, anu_freq_hex);
					return;
				}
			}
		}
	}
	opt_anu_freq = best_fout;
	applog(LOG_NOTICE, "ANU found nearest frequency %.1f with hex %04x", opt_anu_freq,
	       anu_freq_hex);
}

def getAntMinerFreq(freq: Double) = {
		var bestDiff = 1000.0
		var bestOut = freq
		var exactFound = false

		for {
			od <- 0 until 4
			no = 1 << od
			n <- 0 until 16
			nr = n + 1
			m <- 0 until 64
			nf = m + 1
			fout = 25.0 * nf / (nr * no)
			if math.abs(fout - freq) <= bestDiff
			if !exactFound
		} {
			val bs = if(500 <= (fout * no) && (fout * no) <= 1000) 1 else 0
			bestDiff = math.abs(fout - freq)
			bestOut = fout

			val freqVal = (bs << 14) | (m << 7) | (n << 2) | od;

			if(freqVal == fout) {
				exactFound = true
				bestOut = fout
			}
		}

		bestOut
	}