diff options
| author | Keith Packard <keithp@keithp.com> | 2013-05-06 16:08:52 -0700 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2013-05-07 20:08:01 -0700 |
| commit | 3876b5bfad383119339aea51e2cf301012a1f991 (patch) | |
| tree | f8c1cb2ad407578d0fa74d9c325eee706c1d37a9 | |
| parent | 4458b5a3cd3f88188c820cd0763f4e1d99fff311 (diff) | |
altos: Set APRS deviation to 3kHz
I finally found a bunch of references to APRS on the net and they all
appear to assume a 3kHz deviation. Let's see if this works better with
Yaesu radios.
Signed-off-by: Keith Packard <keithp@keithp.com>
| -rw-r--r-- | src/drivers/ao_cc1120.c | 9 | ||||
| -rw-r--r-- | src/drivers/ao_cc115l.c | 8 |
2 files changed, 9 insertions, 8 deletions
diff --git a/src/drivers/ao_cc1120.c b/src/drivers/ao_cc1120.c index 3bef6c90..772014ee 100644 --- a/src/drivers/ao_cc1120.c +++ b/src/drivers/ao_cc1120.c @@ -392,16 +392,15 @@ static const uint16_t rdf_setup[] = { }; /* - * APRS deviation is 5kHz + * APRS deviation is 3kHz * * fdev = fosc >> 24 * (256 + dev_m) << dev_e * - * 32e6Hz / (2 ** 24) * (256 + 71) * (2 ** 3) = 4989 + * 32e6Hz / (2 ** 24) * (256 + 137) * (2 ** 2) = 2998Hz */ -#define APRS_DEV_E 3 -#define APRS_DEV_M 71 -#define APRS_PACKET_LEN 50 +#define APRS_DEV_E 2 +#define APRS_DEV_M 137 /* * For our APRS beacon, set the symbol rate to 9.6kBaud (8x oversampling for 1200 baud data rate) diff --git a/src/drivers/ao_cc115l.c b/src/drivers/ao_cc115l.c index 30c56442..05e6a762 100644 --- a/src/drivers/ao_cc115l.c +++ b/src/drivers/ao_cc115l.c @@ -328,11 +328,13 @@ static const uint16_t rdf_setup[] = { }; /* - * APRS deviation is the same as RDF + * APRS deviation is 3kHz + * + * 26e6 / (2 ** 17) * (8 + 7) * (2 ** 0) = 2975 */ -#define APRS_DEV_E RDF_DEV_E -#define APRS_DEV_M RDF_DEV_M +#define APRS_DEV_E 0 +#define APRS_DEV_M 7 /* * For our APRS beacon, set the symbol rate to 9.6kBaud (8x oversampling for 1200 baud data rate) |