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- Calibration means tuning software parameters during run time.
- In large and complex embedded systems such as automotive engine, transmission control, and PID controllers in food service appliances, the optimum values for the parameters are not known during the development of the code. The optimum values are be determined by manipulating the parameter values during run time and observing the plant’s response.
- For large software, build process (compiling, linking) can take a long time. Calibration allows the user to avoid having to re-build the software every time to try out a new parameter value.
- Calibration is usually the last stage of the development process. Once all the parameters have been tuned, the source code is updated with the new values, and a final build is performed for the release of the software
- The simplest access is over CAN. There are industry standard protocols called CCP and XCP on CAN that define the communication mechanism between the PC and the ECU. Commercially available protocol stack makes implementing CCP or XCP on CAN interface relatively easy with minimal up front cost. The calibration device is simply a USB to CAN or Ethernet to CAN converter. However, because they are based on CAN, they are also the slowest in terms of data bandwidth.
Methodica Technologies can:
- Help you develop and integrate XCP/CCP hooks to read and write run time data using calibration tools like INCA, CANoe or ATI vision.
- Develop the interface with your application layer to send and receive application data.
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