#!/bin/bash

LOGFILE="clock_monitor.log"
echo "Monitoring clock speeds every 3 seconds. Logging to $LOGFILE"
echo "Timestamp | ARM (MHz) | Core (MHz) | V3D (MHz) | PWM (MHz)" > "$LOGFILE"

while true; do
    TIMESTAMP=$(date +"%Y-%m-%d %H:%M:%S")
    ARM_FREQ=$(vcgencmd measure_clock arm | awk -F= '{print $2/1000000}')
    CORE_FREQ=$(vcgencmd measure_clock core | awk -F= '{print $2/1000000}')
    V3D_FREQ=$(vcgencmd measure_clock v3d | awk -F= '{print $2/1000000}')
    PWM_FREQ=$(vcgencmd measure_clock pwm | awk -F= '{print $2/1000000}')

    LOG_ENTRY="$TIMESTAMP | ARM: ${ARM_FREQ} MHz | Core: ${CORE_FREQ} MHz | V3D: ${V3D_FREQ} MHz | PWM: ${PWM_FREQ} MHz"
    echo "$LOG_ENTRY"
    echo "$LOG_ENTRY" >> "$LOGFILE"

    sleep 3
done