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view miscutil/arfcn2ti.c @ 1000:39a6090a052a
doc/How-flash-really-works: article written
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 09 Dec 2023 09:08:19 +0000 |
parents | b8cb116a7dc7 |
children |
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/* * TI's TCS211 L1 does not use standard ARFCNs internally, instead it uses * its own non-standard radio_freq numbers in their place. Other firmware * components and all external interfaces do use standard ARFCNs, thus * conversion functions are invoked at appropriate points in the firmware. * However, L1-internal radio_freq numbers are emitted in L1 debug traces, * thus anyone looking at these traces needs to be able to convert between * standard ARFCNs and L1-internal radio_freq. * * The present utility converts a standard ARFCN into TI L1 radio_freq. */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <strings.h> main(argc, argv) char **argv; { int arfcn; if (argc != 3) { usage: fprintf(stderr, "usage: %s {eu|us} arfcn\n", argv[0]); exit(1); } arfcn = atoi(argv[2]); if (!strcmp(argv[1], "eu")) arfcn2ti_eu(arfcn); else if (!strcmp(argv[1], "us")) arfcn2ti_us(arfcn); else goto usage; exit(0); } arfcn2ti_eu(arfcn) { if (arfcn == 0) arfcn = 174; else if ((arfcn >= 975) && (arfcn <= 1023)) arfcn -= 850; else if ((arfcn >= 512) && (arfcn <= 885)) arfcn -= 337; else if ((arfcn >= 1) && (arfcn <= 124)) ; else { fprintf(stderr, "error: specified ARFCN is invalid for dual-EU\n"); exit(1); } printf("%d\n", arfcn); } arfcn2ti_us(arfcn) { if ((arfcn >= 128) && (arfcn <= 251)) arfcn -= 127; else if ((arfcn >= 512) && (arfcn <= 810)) arfcn -= 387; else { fprintf(stderr, "error: specified ARFCN is invalid for dual-US\n"); exit(1); } printf("%d\n", arfcn); }