def checkMems():
fm.register(20, fm.fpioa.I2S0_IN_D0)
fm.register(19, fm.fpioa.I2S0_WS)
fm.register(18, fm.fpioa.I2S0_SCLK)
mic = I2S(I2S.DEVICE_0)
mic.channel_config(mic.CHANNEL_0,
mic.RECEIVER,
align_mode=I2S.STANDARD_MODE)
mic.set_sample_rate(38640)
img = image.Image()
while button.value():
audio = mic.record(1024)
fft_res = FFT.run(audio.to_bytes(), 512)
fft_amp = FFT.amplitude(fft_res)
img = img.clear()
x_shift = 0
for i in range(50):
if fft_amp[i] > 240:
hist_height = 240
else:
hist_height = fft_amp[i]
hist_width = int(240 / 50)
img = img.draw_rectangle(
(x_shift, 240 - hist_height, hist_width, hist_height),
[255, 255, 255], 2, True)
img.draw_string(0, 0, "Press btn break", lcd.GREEN, scale=2)
x_shift = x_shift + hist_width
lcd.display(img)
fft_amp.clear()
def work(self):
self.agent.parallel_cycle()
ui.canvas.draw_string(10, 30, "9 Audio Test", (127, 127, 255), scale=3)
ui.canvas.draw_string(10,
70,
"isconnected: %s" % (str)(self.isconnected),
(255, 127, 0),
scale=2)
ui.canvas.draw_string(10,
100,
"Test: %s" %
('play' if self.state == 0 else 'record'),
(255, 127, 0),
scale=3)
#print(time.ticks_ms())
if self.isconnected:
if self.state == 0 and self.is_play:
if CubeAudio.event() == False:
CubeAudio.load(os.getcwd() + "/res/sound/loop.wav", 100)
#print('self.count', self.count)
if self.count > 1:
CubeAudio.i2s.set_sample_rate(22050)
else:
# pass
CubeAudio.i2s.set_sample_rate(22050)
elif self.state == 1:
ui.canvas.draw_string(10,
200,
"Press Any-Key \n Start", (255, 127, 0),
scale=3)
elif self.state == 2 and self.is_record:
tmp = CubeAudio.i2s.record(1024)
fft_res = FFT.run(tmp.to_bytes(), 512)
fft_amp = FFT.amplitude(fft_res)
if fft_amp[50] > 100 and fft_amp[100] > 100:
AudioTest.RecordTest = True
sample_page.next()
for x_shift in range(240):
hist_height = fft_amp[x_shift]
ui.canvas.draw_rectangle((x_shift, 0, 1, hist_height),
[255, 255, 255], 1, True)
#print((x_shift, 0, 1, hist_height))
if self.isError != None:
ui.canvas.draw_string(40,
80,
self.isError, (255, 255, 255),
scale=2)
sample_page.next()
def fft_output(leds):
while True:
audio = rx.record(sample_points)
FFT_res = FFT.run(audio.to_bytes(), FFT_points)
FFT_amp = FFT.amplitude(FFT_res)
interval = int(hist_num / n_leds)
count = 0
for i in range(0, hist_num, interval):
if FFT_amp[i] > 240:
hist_height = 240
brightness = 255 / 5
else:
hist_height = FFT_amp[i]
brightness = FFT_amp[i]
leds.set_led(count, (35, brightness, 10))
count = count + 1
leds.display()
def getVoiceFreq():
# get avarange frequency of sound
# return a num in [0,256),usuall in [0,27]
global freq_lis
audio = mic.record(sample_points)
fft_res = FFT.run(audio.to_bytes(), fft_points)
fft_amp = FFT.amplitude(fft_res)
ampl = max(fft_amp)
freq = fft_amp.index(ampl)
fft_amp.clear()
if freq < 200 and ampl > 10:
if len(freq_lis) < 5:
freq_lis.append(freq)
else:
freq_lis.pop(0)
freq_lis.append(freq)
return 0 if not freq_lis else sum(freq_lis) / len(freq_lis)
sample_rate = 38640
rx.set_sample_rate(sample_rate)
img = image.Image()
sample_points = 128
FFT_points = 64
lcd_width = 320
lcd_height = 240
hist_num = FFT_points #changeable
if hist_num > 320:
hist_num = 320
hist_width = int(320 / hist_num) #changeable
x_shift = 0
while True:
audio = rx.record(sample_points)
print(audio)
FFT_res = FFT.run(audio.to_bytes(), FFT_points)
FFT_amp = FFT.amplitude(FFT_res)
#print(FFT_amp)
img = img.clear()
x_shift = 0
for i in range(hist_num):
if FFT_amp[i] > 240:
hist_height = 240
else:
hist_height = FFT_amp[i]
img = img.draw_rectangle(
(x_shift, 240 - hist_height, hist_width, hist_height),
[255, 255, 255], 2, True)
x_shift = x_shift + hist_width
lcd.display(img)
color = [(gammatable[148], gammatable[0], gammatable[211]),
(gammatable[75], gammatable[0], gammatable[130]),
(gammatable[0], gammatable[0], gammatable[255]),
(gammatable[0], gammatable[255], gammatable[0]),
(gammatable[150], gammatable[150], gammatable[0]),
(gammatable[255], gammatable[127], gammatable[0]),
(gammatable[255], gammatable[0], gammatable[0]),
(gammatable[0], gammatable[127], gammatable[127])]
old = time.ticks_ms()
colorSelection = 0
while True:
audio = rx.record(samplePoints)
fftRes = FFT.run(audio.to_bytes(), fftPoints)
fftAmp = FFT.amplitude(fftRes)
new = time.ticks_ms()
if new - old >= 500:
colorSelection = random.randrange(8)
old = new
for i in range(histNum):
if fftAmp[i] > maxHistHeight:
histHeight = maxHistHeight
else:
histHeight = fftAmp[i]
ledHeight = int(mapValue(histHeight, 0, maxHistHeight, 0,
maxLedHeight))
for j in range(maxLedHeight * i, (maxLedHeight * i) + ledHeight):
ws.set_led(j, color[colorSelection])
elif lcd_rotation == 3:
widht,height = lcd.width(),lcd.height()
x = widht - x
y = height - y
img = image.Image(size=(widht, height))
if HW_CAMERA:
img = sensor.snapshot()
new = img.copy(roi=(0, 0, 239, 239))
img = new
audio = mic.record(1024)
fft_res = FFT.run(audio.to_bytes(), 512)
fft_amp = FFT.amplitude(fft_res)
x_shift = 0
for i in range(50):
if fft_amp[i] > 240:
hist_height = 240
else:
hist_height = fft_amp[i]
hist_width = int(240 / 50)
img.draw_rectangle((x_shift, 240-hist_height, hist_width, hist_height),
[255, 255, 255],
2,
True)
x_shift = x_shift + hist_width
fft_amp.clear()
fm.register(20, fm.fpioa.I2S0_IN_D0)
fm.register(30, fm.fpioa.I2S0_WS) # 19 on Go Board and Bit(new version)
fm.register(32, fm.fpioa.I2S0_SCLK) # 18 on Go Board and Bit(new version)
rx = I2S(I2S.DEVICE_0)
rx.channel_config(rx.CHANNEL_0, rx.RECEIVER, align_mode=I2S.STANDARD_MODE)
rx.set_sample_rate(sample_rate)
img = image.Image()
if hist_x_num > 320:
hist_x_num = 320
hist_width = int(320 / hist_x_num) #changeable
x_shift = 0
while True:
audio = rx.record(sample_points)
fft_res = FFT.run(audio.to_bytes(), fft_points)
fft_amp = FFT.amplitude(fft_res)
img = img.clear()
x_shift = 0
for i in range(hist_x_num):
if fft_amp[i] > 240:
hist_height = 240
else:
hist_height = fft_amp[i]
img = img.draw_rectangle(
(x_shift, 240 - hist_height, hist_width, hist_height),
[255, 255, 255], 2, True)
x_shift = x_shift + hist_width
lcd.display(img)
fft_amp.clear()
rx = I2S(I2S.DEVICE_0)
rx.channel_config(rx.CHANNEL_0, rx.RECEIVER, align_mode=I2S.STANDARD_MODE)
rx.set_sample_rate(sample_rate)
#设置LCD条形柱显示宽度
if hist_x_num > 320:
hist_x_num = 320
hist_width = int(320 / hist_x_num) #changeable
#新建一张图片
img = image.Image()
while True:
audio = rx.record(sample_points) #采集音频
fft_res = FFT.run(audio.to_bytes(), fft_points) #FFT运算
fft_amp = FFT.amplitude(fft_res) #计算频谱幅值
img = img.clear()
x_shift = 0
#计算幅值，最大为240（LCD高为240像素）
for i in range(hist_x_num):
if fft_amp[i] > 240:
hist_height = 240
else:
hist_height = fft_amp[i]
#计算要显示的图像，矩形实心显示。
img = img.draw_rectangle(
(x_shift, 240 - hist_height, hist_width, hist_height),
[255, 255, 255], 2, True)