# HG changeset patch
# User Mychaela Falconia <falcon@freecalypso.org>
# Date 1492060425 0
# Node ID 3eb53be9e667324e55ca5b53f2ecd299fcc5fbbb
# Parent  b8599a1d58138fc595b670c71abc7f9f88803948
fc-vcxo-param: use M_PI constant instead of acos(-1.0)

diff -r b8599a1d5813 -r 3eb53be9e667 rfcal/vcxo-manual/genparams.c
--- a/rfcal/vcxo-manual/genparams.c	Thu Apr 13 04:58:58 2017 +0000
+++ b/rfcal/vcxo-manual/genparams.c	Thu Apr 13 05:13:45 2017 +0000
@@ -44,8 +44,6 @@
 main(argc, argv)
 	char **argv;
 {
-	float pi;
-
 	if (argc < 2 || argc > 3) {
 		fprintf(stderr, "usage: %s meas-file [outfile]\n", argv[0]);
 		exit(1);
@@ -68,9 +66,9 @@
 	dac_init = -lin_b2 / lin_a2;
 
 	/* Psi computations */
-	pi = acos(-1.0);
-	Psi_sta = 2.0f * pi * (float)(meas[1].freq_offset - meas[0].freq_offset)
-		/ ((float)(meas[1].dac_value - meas[0].dac_value) * 270833.0f);
+	Psi_sta = 2.0f * (float)M_PI *
+		(float)(meas[1].freq_offset - meas[0].freq_offset) /
+		((float)(meas[1].dac_value - meas[0].dac_value) * 270833.0f);
 	Psi_st = Psi_sta * 0.8f;
 
 	/* spit it all out */