202 lines
7.4 KiB
Python
202 lines
7.4 KiB
Python
import argparse
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import matplotlib.dates as mdates
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import matplotlib.pyplot as plt
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import pandas as pd
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from dateutil.tz import gettz
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from matplotlib.ticker import MultipleLocator
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def plot_power_data(csv_path, output_path, plot_types, sources):
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"""
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Reads power data from a CSV file and generates a plot image.
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Args:
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csv_path (str): The path to the input CSV file.
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output_path (str): The path to save the output plot image.
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plot_types (list): A list of strings indicating which plots to generate
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(e.g., ['power', 'voltage', 'current']).
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sources (list): A list of strings indicating which power sources to plot
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(e.g., ['vin', 'main', 'usb']).
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"""
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try:
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# Read the CSV file into a pandas DataFrame
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df = pd.read_csv(csv_path, parse_dates=['timestamp'])
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print(f"Successfully loaded {len(df)} records from '{csv_path}'")
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# --- Timezone Conversion ---
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local_tz = gettz()
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df['timestamp'] = df['timestamp'].dt.tz_convert(local_tz)
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print(f"Timestamp converted to local timezone: {local_tz}")
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except FileNotFoundError:
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print(f"Error: The file '{csv_path}' was not found.")
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return
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except Exception as e:
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print(f"An error occurred while reading the CSV file: {e}")
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return
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# --- Calculate Average Interval ---
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avg_interval_ms = 0
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if len(df) > 1:
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avg_interval = df['timestamp'].diff().mean()
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avg_interval_ms = avg_interval.total_seconds() * 1000
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# --- Calculate Average Voltages ---
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avg_voltages = {}
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for source in sources:
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voltage_col = f'{source}_voltage'
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if voltage_col in df.columns:
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avg_voltages[source] = df[voltage_col].mean()
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# --- Plotting Configuration ---
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scale_config = {
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'power': {'steps': [5, 20, 50, 160]},
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'voltage': {'steps': [5, 10, 15, 25]},
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'current': {'steps': [1, 2.5, 5, 10]}
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}
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plot_configs = {
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'power': {'title': 'Power Consumption', 'ylabel': 'Power (W)', 'cols': [f'{s}_power' for s in sources]},
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'voltage': {'title': 'Voltage', 'ylabel': 'Voltage (V)', 'cols': [f'{s}_voltage' for s in sources]},
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'current': {'title': 'Current', 'ylabel': 'Current (A)', 'cols': [f'{s}_current' for s in sources]}
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}
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channel_labels = [s.upper() for s in sources]
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color_map = {'vin': 'red', 'main': 'green', 'usb': 'blue'}
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channel_colors = [color_map[s] for s in sources]
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num_plots = len(plot_types)
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if num_plots == 0:
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print("No plot types selected. Exiting.")
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return
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fig, axes = plt.subplots(num_plots, 1, figsize=(15, 9 * num_plots), sharex=True, squeeze=False)
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axes = axes.flatten()
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# --- Loop through selected plot types and generate plots ---
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for i, plot_type in enumerate(plot_types):
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ax = axes[i]
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config = plot_configs[plot_type]
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max_data_value = 0
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for j, col_name in enumerate(config['cols']):
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if col_name in df.columns:
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ax.plot(df['timestamp'], df[col_name], label=channel_labels[j], color=channel_colors[j], zorder=2)
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max_col_value = df[col_name].max()
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if max_col_value > max_data_value:
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max_data_value = max_col_value
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else:
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print(f"Warning: Column '{col_name}' not found in CSV. Skipping.")
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# --- Dynamic Y-axis Scaling ---
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ax.set_ylim(bottom=0)
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if plot_type in scale_config:
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steps = scale_config[plot_type]['steps']
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new_max = next((step for step in steps if step >= max_data_value), steps[-1])
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ax.set_ylim(top=new_max)
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ax.set_title(config['title'])
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ax.set_ylabel(config['ylabel'])
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ax.legend()
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# --- Grid and Tick Configuration ---
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y_min, y_max = ax.get_ylim()
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# Keep the dynamic major_interval logic for tick LABELS
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if plot_type == 'current' and y_max <= 2.5:
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major_interval = 0.5
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elif y_max <= 10:
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major_interval = 2
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elif y_max <= 25:
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major_interval = 5
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else:
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major_interval = y_max / 5.0
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ax.yaxis.set_major_locator(MultipleLocator(major_interval))
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ax.yaxis.set_minor_locator(MultipleLocator(1))
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# Disable the default major grid, but keep the minor one
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ax.yaxis.grid(False, which='major')
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ax.yaxis.grid(True, which='minor', linestyle='--', linewidth=0.6, zorder=0)
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# Draw custom lines for 5 and 10 multiples, which are now the only major grid lines
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for y_val in range(int(y_min), int(y_max) + 1):
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if y_val == 0: continue
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if y_val % 10 == 0:
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ax.axhline(y=y_val, color='green', linestyle='-', linewidth=1.0, zorder=1)
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elif y_val % 5 == 0:
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ax.axhline(y=y_val, color='red', linestyle='-', linewidth=1.0, zorder=1)
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# Keep the x-axis grid
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ax.xaxis.grid(True, which='major', linestyle='--', linewidth=0.8)
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# --- Formatting the x-axis (Time) ---
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local_tz = gettz()
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last_ax = axes[-1]
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if not df.empty:
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last_ax.set_xlim(df['timestamp'].iloc[0], df['timestamp'].iloc[-1])
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last_ax.xaxis.set_major_formatter(mdates.DateFormatter('%H:%M:%S', tz=local_tz))
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last_ax.xaxis.set_major_locator(plt.MaxNLocator(15))
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plt.xlabel(f'Time ({local_tz.tzname(df["timestamp"].iloc[-1])})')
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plt.xticks(rotation=45)
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# --- Add a main title and subtitle ---
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start_time = df['timestamp'].iloc[0].strftime('%Y-%m-%d %H:%M:%S')
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end_time = df['timestamp'].iloc[-1].strftime('%H:%M:%S')
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main_title = f'PowerMate Log ({start_time} to {end_time})'
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subtitle_parts = []
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if avg_interval_ms > 0:
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subtitle_parts.append(f'Avg. Interval: {avg_interval_ms:.2f} ms')
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voltage_strings = [f'{source.upper()} Avg: {avg_v:.2f} V' for source, avg_v in avg_voltages.items()]
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if voltage_strings:
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subtitle_parts.extend(voltage_strings)
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subtitle = ' | '.join(subtitle_parts)
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full_title = main_title
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if subtitle:
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full_title += f'\n{subtitle}'
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fig.suptitle(full_title, fontsize=14)
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# Adjust layout to make space for the subtitle
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plt.tight_layout(rect=[0, 0, 1, 0.93])
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# --- Save the plot to a file ---
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try:
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plt.savefig(output_path, dpi=150)
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print(f"Plot successfully saved to '{output_path}'")
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except Exception as e:
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print(f"An error occurred while saving the plot: {e}")
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def main():
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parser = argparse.ArgumentParser(description="Generate a plot from an Odroid PowerMate CSV log file.")
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parser.add_argument("input_csv", help="Path to the input CSV log file.")
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parser.add_argument("output_image", help="Path to save the output plot image (e.g., plot.png).")
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parser.add_argument(
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"-t", "--type",
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nargs='+',
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choices=['power', 'voltage', 'current'],
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default=['power', 'voltage', 'current'],
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help="Types of plots to generate. Choose from 'power', 'voltage', 'current'. "
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"Default is to generate all three."
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)
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parser.add_argument(
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"-s", "--source",
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nargs='+',
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choices=['vin', 'main', 'usb'],
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default=['vin', 'main', 'usb'],
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help="Power sources to plot. Choose from 'vin', 'main', 'usb'. "
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"Default is to plot all three."
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)
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args = parser.parse_args()
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plot_power_data(args.input_csv, args.output_image, args.type, args.source)
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if __name__ == "__main__":
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main()
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