How to write automobile ecu program

The program in automobile ecu is written by programmers according to the characteristics of automobile, and the programming code of each manufacturer is different.

Automobile electronic control unit refers to the electronic control unit of automobile. Its main function is to collect sensor information, then calculate some values, and then control the actuator to perform corresponding actions. Well-known enterprises include Bosch, Mainland China and Denso.

The development of ecu needs hardware engineers, bottom software engineers, control strategy engineers, calibration engineers, upper computer software engineers and other personnel.

The product-level electronic control unit shall have the following functions:

1.bootloader: In the development process, there is a special interface between downloading and debugging, and the program may change after mass production, so it is necessary to write a boot program to update the program.

2. Signal acquisition: There are many sensors in the car, including analog signals and digital signals, and the system can collect and process the signals.

3. Actuator drive: There are many drivers on the engine, such as throttle, fuel injection solenoid valve, ignition solenoid valve and oxygen sensor. There are two main driving signals: high and low level and PWM wave.

4. Communication: The communication between ecu and other accessories is for fault diagnosis and calibration, which can quickly and accurately find the fault parts of the car.