FAQ

How to configure UDS message length to 8 bytes?

Answer

You can enable padding by going to UDS Tester -> Tp Base -> Padding Enable. You can also set your own Padding Value, which defaults to 0x00.

ZLG 打开设备提示 Set baud rate failed?

Answer

这是一个已知问题，请将EcuBus-Pro安装在非C盘的其他磁盘分区上即可解决。

When using a sequencer to send UDS services over LIN with ID 0x3C and NAD 0x55, why not send a LIN message with ID 0x3D afterward for the slave to respond?

Answer

This is due to the implementation of the lin schedule table. You should start any schedule table first. Then you can send the LIN message with ID 0x3D.

How to calculate the CRC value of a message?

Answer

You can calculate CRC values using the built-in CRC API in scripts. The API supports various CRC algorithms including CRC8, CRC16, and CRC32 with configurable parameters.

How to implement loop counting for periodic messages?

Answer

If you has database and want update signal value periodically:

1. First you need config the message as periodic.
2. Then you neen use OnCan API to listen the message send/receive.
3. Use setSignal API to update signal value.

import { setSignal } from 'ECB'
let val = 0

Util.OnCan(0x142, (data) => {
   setSignal('Model3CAN.VCLEFT_liftgateLatchRequest', val++ % 5)
})

Without database:

1. Just use output API to output the frame with any value you want.

import { output,CanMessage,CAN_ID_TYPE} from 'ECB'
setInterval(() => {
  const canMsg:CanMessage = {
      id: 0x111,
      data: Buffer.from([0,1,2,3,4,5,6,7]),
      dir: 'OUT',
      msgType:{
        idType: CAN_ID_TYPE.STANDARD,
        remote: false,
        brs: false,
        canfd: false,
      }
    }
   output(canMsg)
}, 1000)

Can I use a custom sub-function for preset 0x27 (SecurityAccess) commands? (for example 0x35 / 0x36)

Answer

Yes. When configuring a preset 0x27 service, set the sub-function to custom and enter the target value, such as 0x35 (request seed) and 0x36 (send key).

For security access, make sure the request-seed and send-key sub-functions are paired correctly (typically odd/even pairs) and match your ECU implementation.

Reference: Issue #335 comment