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Automotive LIN Protocol Solution for Power Windows || LIN Master || LIN 2.2 || LIN Slave || S32K144
Solution Overview
-> This demonstration showcases how LIN-based communication enables efficient power window control in vehicles. The system consists of:
S32K144 EVB (LIN Master): Sends commands to the LIN Slave based on user input.
S32K144 EVB (LIN Slave): Controls the power window motor based on received commands.
ADC Potentiometer: Acts as a user input to adjust the window position.
LIN 2.0 Communication: Provides reliable Master-Slave communication.
FreeMASTER Application: Visualizes real-time data for monitoring and debugging.
-> The LIN Master reads the potentiometer value, translates it into a window position command, and sends it to the LIN Slave. The LIN Slave processes the command and adjusts the window (simulated via motor control or LED indication). FreeMASTER allows live monitoring of the ADC values, LIN messages, and motor movement.
Hardware Features
1. NXP S32K144 EVB
-> The S32K144 EVB is an automotive-grade microcontroller evaluation board designed for real-time applications. Key features include:
ARM Cortex-M4 at 112 MHz for fast and efficient processing.
Integrated LIN 2.0/2.1 Controller with hardware support.
Multiple communication interfaces (CAN, SPI, UART, I2C).
12-bit ADC for precise potentiometer readings.
PWM & GPIO support for motor control or LED-based window simulation.
2. ADC Potentiometer
Simulates a power window switch by adjusting voltage levels.
The S32K144’s ADC reads the voltage and maps it to window height percentages.
3. LIN 2.0 Communication
The S32K144 EVBs communicate over LIN using a single-wire bus.
The LIN Master schedules data transmission, and the LIN Slave responds accordingly.
4. FreeMASTER Application
A real-time debugging and visualization tool from NXP.
Displays ADC values, LIN messages, and window position in real time.
Helps in fine-tuning system behavior during development.
Software Features
1. LIN Protocol Implementation
The LIN Master periodically requests data and sends commands to the LIN Slave.
The LIN Slave processes the received data and adjusts the power window control.
LIN 2.0 framing ensures error detection and reliable data transfer.
2. ADC & PWM for Power Window Control
ADC reads the potentiometer voltage and converts it into a percentage (0-100%).
PWM signals or motor control logic in the LIN Slave adjust the window position accordingly.
3. FreeMASTER for Real-Time Monitoring
Graphs and gauges display real-time ADC readings and window position.
Enables tuning of ADC thresholds and LIN communication timing.
Helps validate the power window control algorithm.
