Date: Tue, 8 Jan 2013 19:16:08 +0000 (UTC) From: Adrian Chadd <adrian@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r245173 - user/adrian/ath_radar_stuff/src/spectral_fft Message-ID: <201301081916.r08JG89j073724@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: adrian Date: Tue Jan 8 19:16:08 2013 New Revision: 245173 URL: http://svnweb.freebsd.org/changeset/base/245173 Log: Convert this code over to use the dBm value rather than calculating it in the draw loop. This breaks the Linux decoder for now. Modified: user/adrian/ath_radar_stuff/src/spectral_fft/fft_eval.c user/adrian/ath_radar_stuff/src/spectral_fft/fft_eval.h user/adrian/ath_radar_stuff/src/spectral_fft/fft_freebsd.c Modified: user/adrian/ath_radar_stuff/src/spectral_fft/fft_eval.c ============================================================================== --- user/adrian/ath_radar_stuff/src/spectral_fft/fft_eval.c Tue Jan 8 18:47:29 2013 (r245172) +++ user/adrian/ath_radar_stuff/src/spectral_fft/fft_eval.c Tue Jan 8 19:16:08 2013 (r245173) @@ -212,32 +212,21 @@ int draw_picture(int highlight, int star rnum = 0; - for (result = result_list; result ; result = result->next) { - int datamax = 0, datamin = 65536; - int datasquaresum = 0; + for (result = result_list; result ; result = result->next, rnum++) { - for (i = 0; i < SPECTRAL_HT20_NUM_BINS; i++) { - int data; - - data = result->sample.data[i] * result->sample.data[i]; - datasquaresum += data; - if (data > datamax) datamax = data; - if (data < datamin) datamin = data; - } + if (rnum != highlight) + continue; if (rnum == highlight) { /* prints some statistical data about the currently selected * data sample and auxiliary data. */ - printf("result[%03d]: freq %04d rssi %03d, noise %03d, max_magnitude %04d max_index %03d bitmap_weight %03d tsf %llu | ", + printf("result[%03d]: freq %04d rssi %03d, noise %03d, max_magnitude %04d max_index %03d bitmap_weight %03d tsf %llu\n", rnum, result->sample.freq, result->sample.rssi, result->sample.noise, result->sample.max_magnitude, result->sample.max_index, result->sample.bitmap_weight, result->sample.tsf); - printf("datamax = %d, datamin = %d, datasquaresum = %d\n", datamax, datamin, datasquaresum); - highlight_freq = result->sample.freq; } - for (i = 0; i < SPECTRAL_HT20_NUM_BINS; i++) { float freq; float signal; @@ -249,10 +238,10 @@ int draw_picture(int highlight, int star /* This is where the "magic" happens: interpret the signal * to output some kind of data which looks useful. */ - data = result->sample.data[i]; - if (data == 0) - data = 1; - signal = result->sample.noise + result->sample.rssi + 20 * log10f(data) - log10f(datasquaresum) * 10; + signal = result->sample.data[i]; + printf(" signal[%d]: %f\n", i, signal); + if (signal == 0) + signal = 1; y = 400 - (400.0 + Y_SCALE * signal); @@ -268,7 +257,6 @@ int draw_picture(int highlight, int star continue; } - rnum++; } SDL_BlitSurface(surface, NULL, screen, NULL); Modified: user/adrian/ath_radar_stuff/src/spectral_fft/fft_eval.h ============================================================================== --- user/adrian/ath_radar_stuff/src/spectral_fft/fft_eval.h Tue Jan 8 18:47:29 2013 (r245172) +++ user/adrian/ath_radar_stuff/src/spectral_fft/fft_eval.h Tue Jan 8 19:16:08 2013 (r245173) @@ -5,6 +5,7 @@ typedef int8_t s8; typedef uint8_t u8; typedef uint16_t u16; typedef uint64_t u64; +typedef int16_t s16; /* taken from ath9k.h */ #define SPECTRAL_HT20_NUM_BINS 56 @@ -34,7 +35,7 @@ struct fft_sample_ht20 { u64 tsf; - u16 data[SPECTRAL_HT20_NUM_BINS]; + s16 data[SPECTRAL_HT20_NUM_BINS]; } __attribute__((packed)); Modified: user/adrian/ath_radar_stuff/src/spectral_fft/fft_freebsd.c ============================================================================== --- user/adrian/ath_radar_stuff/src/spectral_fft/fft_freebsd.c Tue Jan 8 18:47:29 2013 (r245172) +++ user/adrian/ath_radar_stuff/src/spectral_fft/fft_freebsd.c Tue Jan 8 19:16:08 2013 (r245173) @@ -70,7 +70,7 @@ pkt_handle_single(struct radar_entry *re result->sample.tsf = re->re_timestamp; /* XXX 56 = numspectralbins */ for (j = 0; j < 56; j++) { - result->sample.data[j] = re->re_spectral_entries[i].pri.bins[j].raw_mag; + result->sample.data[j] = re->re_spectral_entries[i].pri.bins[j].dBm; } /* add it to the list */ @@ -150,7 +150,7 @@ pkt_handle(int chip, const char *pkt, in /* XXX do something about it */ if (r) { - pkt_print(&re); + //pkt_print(&re); pkt_handle_single(&re); } }
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201301081916.r08JG89j073724>