CAN High-Precision Timer Example

NOTE

This example requires a CAN device with hardware timestamp capability to measure the time intervals between received CAN messages. This demo uses a KVASER USB-to-CAN device.

Overview

This example demonstrates how to measure the time intervals between consecutive CAN messages using hardware timestamps. The hardware timestamp provides microsecond-level precision, allowing accurate measurement of message intervals.

Code Example

import { setVar } from 'ECB'

let t1: number | undefined
Util.OnCan(1, (msg) => {
  const t = msg.ts
  if (!t1) {
    t1 = t
  } else {
    const diff = (t - t1) / 1000
    setVar('DIFF', diff)
    t1 = t
  }
})

How It Works

1. The code listens to CAN messages on channel 1 using Util.OnCan
2. For each received message, it extracts the hardware timestamp (msg.ts) in microseconds
3. It calculates the time difference between consecutive messages
4. The difference is converted to milliseconds and stored in the DIFF variable

Results

Through hardware timestamps, you can accurately measure the time intervals between received CAN messages with microsecond-level precision.