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Camera ECU sends External Steering Request (XSR) J1939 message to the steering ECU. The PGN of this message is 0xF341. There is 4-bit checksum within the 8 byte data field. The SPN of this checksum is 21095.
This 4-bit checksum is used to verify the signal path from the demanding device to...
From the book titled "Digital Signal Processing and the Microcontroller"
"Not every signal necessarily starts and ends perfectly in frequency, so we often use the point where the signal has one-half the peak power. (As we'll see later, this corresponds to 1 / sqrt(2), or roughly 0.7 of the...
Please consider some professional embedded system with 16-bit microcontroller.
I know embedded software build tools report program flash memory usage. I think they also report RAM usage but do they report maximum RAM usage?
Build tools may not know how much heap will be used during...
This is a process questions. The question is all VINs in each vehicle model will have same calibration parameter values. If there are Five vehicle models, how to ensure End of Line programmer will flash calibration values in corresponding vehicle?
Bootloader is in place to re-flash...
We have hydraulic steering system with small motor atop it.
This system will be mounted in about Five truck models. All truck models will have same steering software but different values for calibration parameters. Supplier will deliver steering ECUs to OEM manufacturing with steering software...
I have CAN database (dbc file). It's a text file. The extension of this file is dbc. When it is opened in Vector CANdb++ Editor, J1939 messages and CAN IDs are populated.
However, some of the CAN IDs that are in the CANdb++ Editor could not be found in the .dbc text file,
I open the .dbc...
Protocol: J1939
Parameter Group: Active Steering Systems Controls 1 (ASSC1)
Parameter Group Number (PGN): 0xF13D
Parameter: Lane keeping assist (LKA) system state
Suspect Parameter Number (SPN): 9756
This parameter indicates the current state of the LKA feature. It's a 4-bit parameter...
A new truck is being built. Some of systems being built in this truck are electrical power steering (EPS) system, Antilock Braking system (ABS), Engine Control Unit (ECU), Transmission Control Unit (TCU), Body Control Module (BCM), Human Machine Interface (HMI), and Instrument cluster.
Is...
Consider a truck. The Electronic Brake Systems (EBS) ECU receives following message from some other ECU. Please explain this message. From where does some other module acquire the Suspect Parameters Number (SPNs) to send to EBS ECU. What does EBS do with the SPNs it receives?
Please consider Active Steering Assist Electronic Control Unit (Steering ECU) used in a commercial truck. It has Lane Keep Assist (LKA) function, Cross-wind compensation, and Road crown compensation.
This ECU is composed of a camera input, and driver outputs to control the torque overlay...
@scopeprobe, your statements are correct. I'm aware of them but my question is why two CAN channels are connected to each other in a ECU CAN Connector?
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