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| author | Jason Reiss <jreiss@multitech.com> | 2022-10-26 12:13:59 -0500 |
|---|---|---|
| committer | Jason Reiss <jreiss@multitech.com> | 2022-10-26 12:13:59 -0500 |
| commit | 25065e728b18fe174dd5f06396276f22ddb04ee2 (patch) | |
| tree | ee681cc30ac8c1814c218ae9bca359b4734a9553 | |
| parent | 34d28eb28f6931f55a46fdcc6c1b5ba9d5e4cfe4 (diff) | |
| download | lora_gateway_mtac_full-25065e728b18fe174dd5f06396276f22ddb04ee2.tar.gz lora_gateway_mtac_full-25065e728b18fe174dd5f06396276f22ddb04ee2.tar.bz2 lora_gateway_mtac_full-25065e728b18fe174dd5f06396276f22ddb04ee2.zip | |
gps: move cnt_diff check after calculation5.0.20
| -rw-r--r-- | libloragw/src/loragw_gps.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/libloragw/src/loragw_gps.c b/libloragw/src/loragw_gps.c index de0d495..d02e23a 100644 --- a/libloragw/src/loragw_gps.c +++ b/libloragw/src/loragw_gps.c @@ -640,6 +640,11 @@ int lgw_gps_sync(struct tref *ref, uint32_t count_us, struct timespec utc, struc CHECK_NULL(ref); + /* calculate the slope */ + + cnt_diff = (double)(count_us - ref->count_us) / (double)(TS_CPS); /* uncorrected by xtal_err */ + utc_diff = (double)(utc.tv_sec - (ref->utc).tv_sec) + (1E-9 * (double)(utc.tv_nsec - (ref->utc).tv_nsec)); + if (cnt_diff == 0.0 || last_count_us == count_us) { // no pps change from SX1301, invalidate system reference time ref->systime = 0; @@ -649,11 +654,6 @@ int lgw_gps_sync(struct tref *ref, uint32_t count_us, struct timespec utc, struc last_count_us = count_us; - /* calculate the slope */ - - cnt_diff = (double)(count_us - ref->count_us) / (double)(TS_CPS); /* uncorrected by xtal_err */ - utc_diff = (double)(utc.tv_sec - (ref->utc).tv_sec) + (1E-9 * (double)(utc.tv_nsec - (ref->utc).tv_nsec)); - /* detect aberrant points by measuring if slope limits are exceeded */ if (utc_diff != 0) { // prevent divide by zero slope = cnt_diff/utc_diff; |