Project 1- Traffic Jam Assistant Feature

Objective: To develop one specific requirement of the Traffic Jam Assistant algorithm which would predominantly feature in the IPC algorithm.

Requirements:

• This model must be developed in MATLAB Simulink as per MBD guidelines.
• Code Generation Profile must be in Embedded Coder.
• Simulink Data Dictionary must be created for the model & must be linked to the model.
• Model Advisor Report is mandatory & this will be followed by Code Generation

The very first thing that we will do is create a Simulink Data Dictionary using the given Signal and Calibration Data List.

The following is the SLDD file:

Matlab model:

Requirement No 1: Logic

• Input Signal “Input_Voltage” is compared against voltage values “VOLTAGE_MINIMUM_RANGE” & “VOLTAGE_MAXIMUM_RANGE”.
• Incoming input signal “Input_Voltage” must be greater than – equal to “VOLTAGE_MINIMUM_RANGE” and less than – equal to “VOLTAGE_MAXIMUM_RANGE”.
• The output signal from here is “Optimum_Voltage” which will be one of the inputs to the subsystem “DisplayUnit”.

Requirement No 2 (DisplayUnit Subsystem): Logic

• Input Signals are “Optimum_Voltage”, “Input_Switch”, “Enable_Display”. Signal “Enable_Display” must be saturated between the range 0 – 7. The output signal from the subsystem is “Output_Display”.
• Input Signal “Enable_Display” is compared against a pre-defined set of values in a multiport switch. The total data ports in the multiport switch are 5.
• Multiport switch inputs 1 & 2 is connected to calibration signal “ON_MODE”, Multiport switch inputs 3 & 4 is connected to calibration signal “OFF_MODE” while Multiport switch input 5 is connected to calibration signal “STANDBY_MODE”.
• The output from the Multiport switch is connected to the first input port of the Switch block. The third input port of the Switch block is connected to the calibration signal “NO_DISPLAY”.
• Meanwhile NOT the value of the input signal “Input_Switch” is compared in an AND gate against the input signal “Optimum_Voltage” and the output from comparing if calibration signals “INTERRUPT_1” & “INTERRUPT_2” are equal. The output of the AND gate is the second input of the switch block.
• The output from the switch block is “Output_Display”.

SLDD_file:

Model advisor check: For MAB guidelines.

There are warnings that are acceptable but the notable part is that there is not a single Failed result.

Code generation report:

To Generate a Code We will put these blocks in a single Subsystem and Generate a C Code. But first, we will set the Code Generator to Embedded Coder that is ert.tlc in Model Settings.

Code generated:

/*
 * File: Traffic_jam.c
 *
 * Code generated for Simulink model 'Traffic_jam'.
 *
 * Model version                  : 1.3
 * Simulink Coder version         : 9.5 (R2021a) 14-Nov-2020
 * C/C++ source code generated on : Wed Jul 14 11:52:52 2021
 *
 * Target selection: ert.tlc
 * Embedded hardware selection: Intel->x86-64 (Windows64)
 * Code generation objectives: Unspecified
 * Validation result: Not run
 */

#include "Traffic_jam.h"
#include "Traffic_jam_private.h"

/* Real-time model */
static RT_MODEL_Traffic_jam_T Traffic_jam_M_;
RT_MODEL_Traffic_jam_T *const Traffic_jam_M = &Traffic_jam_M_;

/* Model step function */
void Traffic_jam_step(void)
{
  /* local block i/o variables */
  boolean_T Optimum_Voltage;
  uint8_T tmp;

  /* Outputs for Atomic SubSystem: '<Root>/Traffic_jam_assistant' */
  /* Logic: '<S3>/OR' incorporates:
   *  Constant: '<S4>/Constant'
   *  Constant: '<S5>/Constant'
   *  Inport: '<Root>/Input_Voltage'
   *  RelationalOperator: '<S4>/Compare'
   *  RelationalOperator: '<S5>/Compare'
   */
  Optimum_Voltage = ((Input_Voltage >= VOLTAGE_MINIMUM_RANGE) || (Input_Voltage <=
    VOLTAGE_MAXIMUM_RANGE));

  /* Switch: '<S2>/Switch' incorporates:
   *  Constant: '<S2>/Constant4'
   *  Constant: '<S2>/Constant5'
   *  Inport: '<Root>/Input_Switch'
   *  Logic: '<S2>/AND'
   *  Logic: '<S2>/NOT'
   *  RelationalOperator: '<S2>/Equal'
   */
  if (Optimum_Voltage && (!Input_Switch) && (INTERRUPT_1 == INTERRUPT_2)) {
    /* Saturate: '<S2>/Saturation' incorporates:
     *  Inport: '<Root>/Enable_Display'
     */
    if (Enable_Display < 1) {
      tmp = 0U;
    } else {
      tmp = 1U;
    }

    /* End of Saturate: '<S2>/Saturation' */

    /* MultiPortSwitch: '<S2>/Multiport Switch' */
    if (tmp == 1) {
      /* Switch: '<S2>/Switch' incorporates:
       *  Constant: '<S2>/Constant'
       */
      Output_Display = ON_MODE;
    } else {
      /* Switch: '<S2>/Switch' incorporates:
       *  Constant: '<S2>/Constant1'
       */
      Output_Display = STANDBY_MODE;
    }

    /* End of MultiPortSwitch: '<S2>/Multiport Switch' */
  } else {
    /* Switch: '<S2>/Switch' incorporates:
     *  Constant: '<S2>/Constant3'
     */
    Output_Display = NO_DISPLAY;
  }

  /* End of Switch: '<S2>/Switch' */
  /* End of Outputs for SubSystem: '<Root>/Traffic_jam_assistant' */
}

/* Model initialize function */
void Traffic_jam_initialize(void)
{
  /* (no initialization code required) */
}

/* Model terminate function */
void Traffic_jam_terminate(void)
{
  /* (no terminate code required) */
}

/*
 * File trailer for generated code.
 *
 * [EOF]
 */

Conclusion:

Successfully build the model of Traffic jam assist feature as per the given requirement in Matlab environment and ran for model advisor check and generated code of the model.