6e647c6f26
adc/microphone_adc - Read analog values from a microphone and plot the measured sound amplitude. i2c/bmp280_i2c - Read and convert temperature and pressure data from a BMP280 sensor, attached to an I2C bus. i2c/lis3dh_i2c - Read acceleration and temperature value from a LIS3DH sensor via I2C i2c/mcp9808_i2c - Read temperature, set limits and raise alerts when limits are surpassed. i2c/mma8451_i2c - Read acceleration from a MMA8451 accelerometer and set range and precision for the data. i2c/mpl3115a2_i2c - Interface with an MPL3115A2 altimeter, exploring interrupts and advanced board features, via I2C. i2c/oled_i2c - Convert and display a bitmap on a 128x32 SSD1306-driven OLED display i2c/pa1010d_i2c - Read GPS location data, parse and display data via I2C. i2c/pcf8523_i2c - Read time and date values from a real time clock. Set current time and alarms on it. uart/lcd_uart - Display text and symbols on a 16x02 RGB LCD display via UART
78 lines
2.0 KiB
Python
Executable File
78 lines
2.0 KiB
Python
Executable File
#!/usr/bin/env python3
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# Grabs raw data from the Pico's UART and plots it as received
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# Install dependencies:
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# python3 -m pip install pyserial matplotlib
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# Usage: python3 plotter <port>
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# eg. python3 plotter /dev/ttyACM0
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# see matplotlib animation API for more: https://matplotlib.org/stable/api/animation_api.html
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import serial
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import sys
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import matplotlib.pyplot as plt
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import matplotlib.animation as animation
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from matplotlib.lines import Line2D
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# disable toolbar
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plt.rcParams['toolbar'] = 'None'
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class Plotter:
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def __init__(self, ax):
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self.ax = ax
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self.maxt = 250
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self.tdata = [0]
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self.ydata = [3.3/2]
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self.line = Line2D(self.tdata, self.ydata)
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self.ax.add_line(self.line)
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self.ax.set_ylim(0, 3.3)
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self.ax.set_xlim(0, self.maxt)
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def update(self, y):
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lastt = self.tdata[-1]
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if lastt - self.tdata[0] >= self.maxt: # drop old frames
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self.tdata = self.tdata[1:]
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self.ydata = self.ydata[1:]
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self.ax.set_xlim(self.tdata[0], self.tdata[0] + self.maxt)
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t = lastt + 1
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self.tdata.append(t)
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self.ydata.append(y)
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self.line.set_data(self.tdata, self.ydata)
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return self.line,
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def serial_getter():
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# grab fresh ADC values
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# note sometimes UART drops chars so we try a max of 5 times
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# to get proper data
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while True:
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for i in range(5):
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line = ser.readline()
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try:
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line = float(line)
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except ValueError:
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continue
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break
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yield line
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if len(sys.argv) < 2:
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raise Exception("Ruh roh..no port specified!")
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ser = serial.Serial(sys.argv[1], 115200, timeout=1)
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fig, ax = plt.subplots()
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plotter = Plotter(ax)
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ani = animation.FuncAnimation(fig, plotter.update, serial_getter, interval=1,
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blit=True, cache_frame_data=False)
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ax.set_xlabel("Samples")
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ax.set_ylabel("Voltage (V)")
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fig.canvas.manager.set_window_title('Microphone ADC example')
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fig.tight_layout()
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plt.show()
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