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| -rw-r--r-- | README.md | 1 | ||||
| -rw-r--r-- | airspy_waterfall.py | 153 |
2 files changed, 0 insertions, 154 deletions
@@ -55,7 +55,6 @@ udevadm control --reload-rules ## Supported and tested -| --- | --- | --- | --- | | Python | libairspyhf | OS | Status | | --- |--- | --- | --- | | 3.9, 3.10 | 1.7.1 | ArchLinux, Ubuntu 20.04 | Supported and tested | diff --git a/airspy_waterfall.py b/airspy_waterfall.py deleted file mode 100644 index 255ecd5..0000000 --- a/airspy_waterfall.py +++ /dev/null @@ -1,153 +0,0 @@ -import os -import sys -import math - -import airspyhf - -import matplotlib -import numpy -import pylab - -import pygame -from pygame import gfxdraw - -CENTER_FREQ = 4e6 -SAMPLE_RATE = 196e3 -SAMPLE_NUM = 2048 -GAIN = 'auto' - -SCREEN_X = 1025 -SCREEN_Y = 320 - -MOVE_STEP = 0.1e6 - -# init RTLSDR and if no then go out -try: - pass -except IOError: - print - "Probably RTLSDR device not attached" - sys.exit(0) - -# config rtlsdr device -#rtl.sample_rate = SAMPLE_RATE -#rtl.center_freq = CENTER_FREQ -#rtl.gain = GAIN - - -def iq_abs(c): - return (math.sqrt((c.real ** 2 + c.imag ** 2))) - - -# point should be normalised to 0.0 ... 1.0 -def color_normalise(point): - ret = (255, 0, 0) - # blue - if (point < 0.3): - ret = (0, 0, int(point * 255 * 3.3)) - # yello - elif (point < 0.7): - ret = (0, int((point - 0.3) * 255 * 2.5), 0) - # red - elif (point <= 1.0): - ret = (int((point - 0.7) * 255 * 3.3), 0, 0) - else: - # print "Color Error ", point - pass - return ret - - -def color_mapping(x): - "assumes -50 to 0 range, returns color" - r = int((x + 50) * 255 // 50) - r = max(0, r) - r = min(255, r) - return (r, r, 100) - - -# def draw_Hz( surface, x, y, hz ): - - -arr = [[0 for i in range(0, SCREEN_X)] for j in range(0, SCREEN_Y)] - -# init all pygame modules audio,video and more -pygame.init() - -# [NEW] creates screen surface using constants -screen = pygame.display.set_mode((SCREEN_X, SCREEN_Y)) - -#samples = rtl.read_samples(SAMPLE_NUM) -samples = [] - -run = True -line = 0 -while run: - - # print "update" - - # check for all events that where ocure - for event in pygame.event.get(): - # if some one clicked on close button - if event.type == pygame.QUIT: - # terminate programm - run = False - # don't waste your time by waiting while event loop will end - break - elif event.type == pygame.KEYDOWN: - if event.key == pygame.K_LEFT: - print - "Left" - rtl.center_freq -= MOVE_STEP - print - "Center freq: ", rtl.center_freq, " Hz" - elif event.key == pygame.K_RIGHT: - print - "Right" - rtl.center_freq += MOVE_STEP - print - "Center freq: ", rtl.center_freq, " Hz" - - width = SCREEN_X - height = SCREEN_Y - - samples = rtl.read_samples(SAMPLE_NUM) - spect = numpy.fft.fft(samples) - spect = spect[0:len(spect) / 2] - - # (1/(Fs*N)) * abs(xdft).^2; - spect_n = [(1.0 / (SAMPLE_NUM * len(spect))) * iq_abs(x) ** 2 for x in spect] - spect_n = (10 * numpy.log10(spect_n)).tolist() - - # total data size - spect_len = len(spect_n) - - # calculate amount spect points per pixel without rounding - pixel_width = spect_len / SCREEN_X + 1 - pixel_steps = spect_len / pixel_width - - for step in range(0, pixel_steps): - avg = 0.0 - for i in range(0, pixel_width): - avg += spect_n[step * pixel_width + i] - avg /= pixel_width - - # print avg - # gfxdraw.pixel( screen, step, line, color_normalise((100-abs(avg))/10)) - gfxdraw.pixel(screen, step, line, color_mapping(avg)) - - # draw central freq - font = pygame.font.Font(None, 20) - text = font.render(str(rtl.center_freq / 1e6), 1, (200, 30, 30), (0, 0, 0)) - screen.blit(text, (SCREEN_X / 2, SCREEN_Y - 20)) - text = font.render(str((rtl.center_freq + SAMPLE_RATE / 2) / 1e6), 1, (200, 30, 30), (0, 0, 0)) - screen.blit(text, (SCREEN_X - 40, SCREEN_Y - 20)) - text = font.render(str((rtl.center_freq - SAMPLE_RATE / 2) / 1e6), 1, (200, 30, 30), (0, 0, 0)) - screen.blit(text, (20, SCREEN_Y - 20)) - - pygame.display.flip() - line += 1 - if (line > SCREEN_Y): - line = 0 - -pygame.quit - |