diff options
Diffstat (limited to 'controller/fw/src/freq_meas.c')
| -rw-r--r-- | controller/fw/src/freq_meas.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/controller/fw/src/freq_meas.c b/controller/fw/src/freq_meas.c index 020e12d..6b9b54e 100644 --- a/controller/fw/src/freq_meas.c +++ b/controller/fw/src/freq_meas.c @@ -136,7 +136,13 @@ int adc_buf_measure_freq(uint16_t adc_buf[FMEAS_FFT_LEN], float *out) { DEBUG_PRINT("done."); */ - *out = (par[1] + first_bin) * binsize_hz; + float res = (par[1] + first_bin) * binsize_hz; + if (res < 5 || res > 150) { + *out = NAN; + return -1; + } + + *out = res; return 0; } |