FreeCalypso > hg > freecalypso-reveng

annotate miscprog/osmo2psi.c @ 277:5c47d916255e

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
compal/c156-boot.disasm: GPIO comments were wrong
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 05 Nov 2018 23:18:42 +0000
parents 63c5bb42eca5
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
222
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 * This test program seeks to help figure out the mapping between OsmocomBB's
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 * AFC_SLOPE constant and the Psi constants used by TI's AFC implementation,
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * as our fc-rfcal-vcxo tool would compute them from CMU200 measurements.
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 */
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 #include <math.h>
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 #include <stdio.h>
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 #include <stdlib.h>
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 main(argc, argv)
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 char **argv;
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 {
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 int afc_slope;
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 float lin_a;
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 float Psi_sta, Psi_st;
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 if (argc != 2) {
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 fprintf(stderr, "usage: %s osmo-afc-slope\n", argv[0]);
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 exit(1);
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 }
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 afc_slope = atoi(argv[1]);
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 lin_a = (float)afc_slope / 32768.0f * 898.0f;
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 /* Psi computations */
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 Psi_sta = 2.0f * (float)M_PI * lin_a / 270833.0f;
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 Psi_st = Psi_sta * 0.8f;
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 printf("Psi_sta_inv = %u\n", (unsigned)(1.0f / Psi_sta));
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 printf("Psi_st = %u\n", (unsigned)(Psi_st * 65536.0f));
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 printf("Psi_st_32 = %u\n", (unsigned)(Psi_st * 65536.0f * 65536.0f));
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 printf("Psi_st_inv = %u\n", (unsigned)(1.0f / Psi_st));
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 exit(0);
63c5bb42eca5 osmo2psi test program written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 }