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Flash Bootloader solutions for ECU Reprogramming
Bootloader Software Solution for Automotive ECU
Designed by our experienced embedded software developers, this time-tested, stable and ready-to-deploy flash bootloader solution has been successfully integrated in a number of production programs across US, India and Europe.
This Low Memory footprint (both ROM and RAM) bootloader software solution for automotive is compatible with application-level protocols like UDS on CAN, UDS on IP, J1939 and KWP2000.
This bootloader also supports communication protocols like CAN FD, CAN and LIN.
It is compatible with both RTOS and non-RTOS based applications. And the reprogramming code sequence is customizable as per the requirements of your target application.
Ans. Yes, our designed Bootloader software is compatible with popularly used communication protocols (either wired/wireless).
Following is the indicative list of protocols which are compatible with our bootloader design:
Ans. The Bootloader code is executed first with the initiation of the system.
If there is a valid application present in the application block, then the control jumps from Boot to the application block.
Ans. Yes. We provide development services for thePC based application. The application development can be done either by using QT C++ scripting for window application or CAPL + CANoE scripting depending on the user specification.
Ans. After the requirement gathering and application analysis phase, the detailed design documentation is completed based on the customer’s inputs and requirements. This is part of our Service Level Agreement (SLA).
Ans. We have expertise in development of flash bootloaders including ARM bootloader, STM32 Bootloader, Infineon Bootloader etc. If you wish to build a flash bootloader for a different microprocessor family, we can provide necessary support for that.
Features of Flash Bootloader Software Solution Designed by Our Automotive Engineers:
Our proprietary Flash Bootloader software solution is compatible with all popular CPU architectures available in the market
Low memory footprint (both ROM and RAM) of the automotive grade bootloader solution
Leverage the benefits of the layered architecture of our flash bootloader solution
Well-structured and well-defined documentations of the bootloader solution
Expertise in development of both Primary and Secondary Flash Bootloader solution
ECU Flashing support using tools like PCAN, VFlash and ValueCAN3
What is Flash Bootloader Software?
Flash Bootloader software, which is integrated with an automotive ECU (electronic control unit) application, facilitates the ECU reprogramming and/or software update in an automotive ECU.
Integration of flash bootloader software eliminates the need for specialized hardware (like JTAG programmer) and physical removal of the ECU from the vehicle for ECU reprogramming or application software update.
Flash Bootloader software design is completely independent of the ECU application (which needs to be updated or flashed).
Learn about the Generic Bootloader Software Architecture:
What are the different types of Bootloaders?
There are primarily two types of Bootloaders: –
Primary or Single Bootloader (PBL): Primary Bootloader (PBL) is installed in the ROM and is the first block to execute on boot reset. The main function of the Primary Bootloader is to download the Secondary Bootloader in the RAM of the automotive ECU and activate the SBL.
Secondary Bootloader (SBL): The Secondary Bootloader is used for reprogramming and/or software update of the automotive ECU application software.
The above mentioned software architecture of the Flash Bootloader ensures low memory footprint of the bootloader software.
The Flash Bootloader is programmed in the EOL Station and is loaded on the microcontroller Flash memory (which stores both the bootloader software and ECU application software).
If the applications are validated, the software control is moved to the automotive ECU application software. If not validated, then control of the software remains with the Bootloader.
The Bootloader communicates with ECU reprogramming tools through serial communication protocols (UART, LIN, SPI, CAN, Ethernet, etc.) and can reprogram the ECU application software.
The Bootloader software also detects, reports, and manages errors like power failures, loss of communication, and Flash-write errors.
Flash error protection is usually accomplished by storing a checksum or Cyclic Redundancy Code (CRC) for the ECU application.
Learn about the UDS-based Bootloader Software Architecture
A secure way of reprogramming the ECU Application software can be achieved by using a UDS-based (Flash Bootloader software, which also contains diagnostics services).
Multi-packet data is handled by the Transport layer using ISOTP modules. The services listed below are used in the UDS-based Bootloader software:
• Diagnostics Session Control
• ECU Reset
• Routine Control (Flash-Erase and Application Validation)
• Request Download
• Transfer Data
• Transfer Exit
• Clear DTC
Learn about the J9139-based Bootloader Architecture
Secure reprogramming of the ECU Application software is also possible using the J1939-based Flash Bootloader software.
It uses CAN communication protocol with a 250kbps rate. Multi-packet data will be handled by the Transport layer – J1939/21 – TP.
The following layers are in the J1939 Bootloader software: