Simulink代码生成（五）——代码生成文件的结构

一、代码生成的文件

代码生成的文件如下所示，每个文件的详细解释可以参考下面的描述。

1、Main files

1.1、ert_main.c

ert_main.c的内容如下所示，通常下都不使用这里的main函数，而是根据自己的需求，自定义main函数。从函数内容中可以看到，rt_OneStep这个我们最重要的函数没有在main函数中被调用，所以生成的代码就算下载到开发板中也没有效果。

/*
 * File: ert_main.c
 *
 * Code generated for Simulink model 'untitled'.
 *
 * Model version                  : 1.5
 * Simulink Coder version         : 9.0 (R2018b) 24-May-2018
 * C/C++ source code generated on : Wed Oct 12 23:13:39 2022
 *
 * Target selection: ert.tlc
 * Embedded hardware selection: Intel->x86-64 (Windows64)
 * Code generation objectives: Unspecified
 * Validation result: Not run
 */

#include <stddef.h>
#include <stdio.h>                     /* This ert_main.c example uses printf/fflush */
#include "untitled.h"                  /* Model's header file */
#include "rtwtypes.h"

/*
 * Associating rt_OneStep with a real-time clock or interrupt service routine
 * is what makes the generated code "real-time".  The function rt_OneStep is
 * always associated with the base rate of the model.  Subrates are managed
 * by the base rate from inside the generated code.  Enabling/disabling
 * interrupts and floating point context switches are target specific.  This
 * example code indicates where these should take place relative to executing
 * the generated code step function.  Overrun behavior should be tailored to
 * your application needs.  This example simply sets an error status in the
 * real-time model and returns from rt_OneStep.
 */
void rt_OneStep(void);
void rt_OneStep(void)
{
  static boolean_T OverrunFlag = false;

  /* Disable interrupts here */

  /* Check for overrun */
  if (OverrunFlag) {
    rtmSetErrorStatus(untitled_M, "Overrun");
    return;
  }

  OverrunFlag = true;

  /* Save FPU context here (if necessary) */
  /* Re-enable timer or interrupt here */
  /* Set model inputs here */

  /* Step the model */
  untitled_step();

  /* Get model outputs here */

  /* Indicate task complete */
  OverrunFlag = false;

  /* Disable interrupts here */
  /* Restore FPU context here (if necessary) */
  /* Enable interrupts here */
}

/*
 * The example "main" function illustrates what is required by your
 * application code to initialize, execute, and terminate the generated code.
 * Attaching rt_OneStep to a real-time clock is target specific.  This example
 * illustrates how you do this relative to initializing the model.
 */
int_T main(int_T argc, const char *argv[])
{
  /* Unused arguments */
  (void)(argc);
  (void)(argv);

  /* Initialize model */
  untitled_initialize();

  /* Attach rt_OneStep to a timer or interrupt service routine with
   * period 0.2 seconds (the model's base sample time) here.  The
   * call syntax for rt_OneStep is
   *
   *  rt_OneStep();
   */
  printf("Warning: The simulation will run forever. "
         "Generated ERT main won't simulate model step behavior. "
         "To change this behavior select the 'MAT-file logging' option.n");
  fflush((NULL));
  while (rtmGetErrorStatus(untitled_M) == (NULL)) {
    /*  Perform other application tasks here */
  }

  /* Disable rt_OneStep() here */

  /* Terminate model */
  untitled_terminate();
  return 0;
}

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

2、Model files

2.1、untitled.c

untitled.c是代码生成中最重要的文件，自定义模型生成的代码就存在这个文件中。untitled.c的有三个重要的函数。
untitled_step：模型生成的代码就在这个函数中。
untitled_initialize：对工程使用的全局变量进行初始化。
untitled_terminate：这个通常没有用，在进行嵌入式开发时，可以选择不生成
上述三个文件被称为模型入口函数。

/*
 * File: untitled.c
 *
 * Code generated for Simulink model 'untitled'.
 *
 * Model version                  : 1.5
 * Simulink Coder version         : 9.0 (R2018b) 24-May-2018
 * C/C++ source code generated on : Wed Oct 12 23:13:39 2022
 *
 * Target selection: ert.tlc
 * Embedded hardware selection: Intel->x86-64 (Windows64)
 * Code generation objectives: Unspecified
 * Validation result: Not run
 */

#include "untitled.h"
#include "untitled_private.h"

/* External inputs (root inport signals with default storage) */
ExtU_untitled_T untitled_U;

/* External outputs (root outports fed by signals with default storage) */
ExtY_untitled_T untitled_Y;

/* Real-time model */
RT_MODEL_untitled_T untitled_M_;
RT_MODEL_untitled_T *const untitled_M = &untitled_M_;

/* Model step function */
void untitled_step(void)
{
  /* Switch: '<Root>/Switch' incorporates:
   *  Inport: '<Root>/In1'
   */
  if (untitled_U.In1 > untitled_P.Switch_Threshold) {
    /* Outport: '<Root>/Out1' incorporates:
     *  Gain: '<Root>/Gain'
     */
    untitled_Y.Out1 = untitled_P.Gain_Gain * untitled_U.In1;
  } else {
    /* Outport: '<Root>/Out1' incorporates:
     *  Gain: '<Root>/Gain1'
     */
    untitled_Y.Out1 = untitled_P.Gain1_Gain * untitled_U.In1;
  }

  /* End of Switch: '<Root>/Switch' */
}

/* Model initialize function */
void untitled_initialize(void)
{
  /* Registration code */

  /* initialize error status */
  rtmSetErrorStatus(untitled_M, (NULL));

  /* external inputs */
  untitled_U.In1 = 0.0;

  /* external outputs */
  untitled_Y.Out1 = 0.0;
}

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

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

2.2、untitled.h

untitled.h包含需要用到的头文件，以及变量的定义，在这里模型的输入输出还有参数，都是通过结构体进行定义的，也可以根据自己的需求进行定制生成。

/*
 * File: untitled.h
 *
 * Code generated for Simulink model 'untitled'.
 *
 * Model version                  : 1.5
 * Simulink Coder version         : 9.0 (R2018b) 24-May-2018
 * C/C++ source code generated on : Wed Oct 12 23:13:39 2022
 *
 * Target selection: ert.tlc
 * Embedded hardware selection: Intel->x86-64 (Windows64)
 * Code generation objectives: Unspecified
 * Validation result: Not run
 */

#ifndef RTW_HEADER_untitled_h_
#define RTW_HEADER_untitled_h_
#include <stddef.h>
#ifndef untitled_COMMON_INCLUDES_
# define untitled_COMMON_INCLUDES_
#include "rtwtypes.h"
#endif                                 /* untitled_COMMON_INCLUDES_ */

#include "untitled_types.h"

/* Macros for accessing real-time model data structure */
#ifndef rtmGetErrorStatus
# define rtmGetErrorStatus(rtm)        ((rtm)->errorStatus)
#endif

#ifndef rtmSetErrorStatus
# define rtmSetErrorStatus(rtm, val)   ((rtm)->errorStatus = (val))
#endif

/* External inputs (root inport signals with default storage) */
typedef struct {
  real_T In1;                          /* '<Root>/In1' */
} ExtU_untitled_T;

/* External outputs (root outports fed by signals with default storage) */
typedef struct {
  real_T Out1;                         /* '<Root>/Out1' */
} ExtY_untitled_T;

/* Parameters (default storage) */
struct P_untitled_T_ {
  real_T Gain1_Gain;                   /* Expression: 2
                                        * Referenced by: '<Root>/Gain1'
                                        */
  real_T Gain_Gain;                    /* Expression: 1.5
                                        * Referenced by: '<Root>/Gain'
                                        */
  real_T Switch_Threshold;             /* Expression: 0
                                        * Referenced by: '<Root>/Switch'
                                        */
};

/* Real-time Model Data Structure */
struct tag_RTM_untitled_T {
  const char_T * volatile errorStatus;
};

/* Block parameters (default storage) */
extern P_untitled_T untitled_P;

/* External inputs (root inport signals with default storage) */
extern ExtU_untitled_T untitled_U;

/* External outputs (root outports fed by signals with default storage) */
extern ExtY_untitled_T untitled_Y;

/* Model entry point functions */
extern void untitled_initialize(void);
extern void untitled_step(void);
extern void untitled_terminate(void);

/* Real-time Model object */
extern RT_MODEL_untitled_T *const untitled_M;

/*-
 * The generated code includes comments that allow you to trace directly
 * back to the appropriate location in the model.  The basic format
 * is <system>/block_name, where system is the system number (uniquely
 * assigned by Simulink) and block_name is the name of the block.
 *
 * Use the MATLAB hilite_system command to trace the generated code back
 * to the model.  For example,
 *
 * hilite_system('<S3>')    - opens system 3
 * hilite_system('<S3>/Kp') - opens and selects block Kp which resides in S3
 *
 * Here is the system hierarchy for this model
 *
 * '<Root>' : 'untitled'
 */
#endif                                 /* RTW_HEADER_untitled_h_ */

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

2.3、untitled_private.h

untitled_private.h是simulink机制所使用的内部的宏，以及宏数据的定义。不需要对该文件进行改写。

/*
 * File: untitled_private.h
 *
 * Code generated for Simulink model 'untitled'.
 *
 * Model version                  : 1.5
 * Simulink Coder version         : 9.0 (R2018b) 24-May-2018
 * C/C++ source code generated on : Wed Oct 12 23:13:39 2022
 *
 * Target selection: ert.tlc
 * Embedded hardware selection: Intel->x86-64 (Windows64)
 * Code generation objectives: Unspecified
 * Validation result: Not run
 */

#ifndef RTW_HEADER_untitled_private_h_
#define RTW_HEADER_untitled_private_h_
#include "rtwtypes.h"
#endif                                 /* RTW_HEADER_untitled_private_h_ */

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

2.4、untitled_types.h

untitled_types.h做了一些前项结构体的声明，以及一些别名的定义。不需要进行处理，使用的时候拷贝就行。

/*
 * File: untitled_types.h
 *
 * Code generated for Simulink model 'untitled'.
 *
 * Model version                  : 1.5
 * Simulink Coder version         : 9.0 (R2018b) 24-May-2018
 * C/C++ source code generated on : Wed Oct 12 23:13:39 2022
 *
 * Target selection: ert.tlc
 * Embedded hardware selection: Intel->x86-64 (Windows64)
 * Code generation objectives: Unspecified
 * Validation result: Not run
 */

#ifndef RTW_HEADER_untitled_types_h_
#define RTW_HEADER_untitled_types_h_
#include "rtwtypes.h"

/* Parameters (default storage) */
typedef struct P_untitled_T_ P_untitled_T;

/* Forward declaration for rtModel */
typedef struct tag_RTM_untitled_T RT_MODEL_untitled_T;

#endif                                 /* RTW_HEADER_untitled_types_h_ */

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

2.5、untitled_types.h

untitled_data.c是一个数据文件，存储模型中包含的参数，常量。下载到开发板中，存储字在ROM中。默认情况下把不同模块的常量放到一起。

/*
 * File: untitled_data.c
 *
 * Code generated for Simulink model 'untitled'.
 *
 * Model version                  : 1.5
 * Simulink Coder version         : 9.0 (R2018b) 24-May-2018
 * C/C++ source code generated on : Wed Oct 12 23:13:39 2022
 *
 * Target selection: ert.tlc
 * Embedded hardware selection: Intel->x86-64 (Windows64)
 * Code generation objectives: Unspecified
 * Validation result: Not run
 */

#include "untitled.h"
#include "untitled_private.h"

/* Block parameters (default storage) */
P_untitled_T untitled_P = {
  /* Expression: 2
   * Referenced by: '<Root>/Gain1'
   */
  2.0,

  /* Expression: 1.5
   * Referenced by: '<Root>/Gain'
   */
  1.5,

  /* Expression: 0
   * Referenced by: '<Root>/Switch'
   */
  0.0
};

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

3、Utility files

3.1、rtwtypes.h

rtwtypes.h定义了Embedded coder中用到的数据类型，结构体和宏。
Embedded coder在生成代码的时候必需包含这个文件。
这个文件不需要修改。

/*
 * File: rtwtypes.h
 *
 * Code generated for Simulink model 'untitled'.
 *
 * Model version                  : 1.5
 * Simulink Coder version         : 9.0 (R2018b) 24-May-2018
 * C/C++ source code generated on : Wed Oct 12 23:13:39 2022
 *
 * Target selection: ert.tlc
 * Embedded hardware selection: Intel->x86-64 (Windows64)
 * Code generation objectives: Unspecified
 * Validation result: Not run
 */

#ifndef RTWTYPES_H
#define RTWTYPES_H

/* Logical type definitions */
#if (!defined(__cplusplus))
#  ifndef false
#   define false                       (0U)
#  endif

#  ifndef true
#   define true                        (1U)
#  endif
#endif

/*=======================================================================*
 * Target hardware information
 *   Device type: Intel->x86-64 (Windows64)
 *   Number of bits:     char:   8    short:   16    int:  32
 *                       long:  32
 *                       native word size:  64
 *   Byte ordering: LittleEndian
 *   Signed integer division rounds to: Zero
 *   Shift right on a signed integer as arithmetic shift: on
 *=======================================================================*/

/*=======================================================================*
 * Fixed width word size data types:                                     *
 *   int8_T, int16_T, int32_T     - signed 8, 16, or 32 bit integers     *
 *   uint8_T, uint16_T, uint32_T  - unsigned 8, 16, or 32 bit integers   *
 *   real32_T, real64_T           - 32 and 64 bit floating point numbers *
 *=======================================================================*/
typedef signed char int8_T;
typedef unsigned char uint8_T;
typedef short int16_T;
typedef unsigned short uint16_T;
typedef int int32_T;
typedef unsigned int uint32_T;
typedef float real32_T;
typedef double real64_T;

/*===========================================================================*
 * Generic type definitions: boolean_T, char_T, byte_T, int_T, uint_T,       *
 *                           real_T, time_T, ulong_T.                        *
 *===========================================================================*/
typedef double real_T;
typedef double time_T;
typedef unsigned char boolean_T;
typedef int int_T;
typedef unsigned int uint_T;
typedef unsigned long ulong_T;
typedef char char_T;
typedef unsigned char uchar_T;
typedef char_T byte_T;

/*===========================================================================*
 * Complex number type definitions                                           *
 *===========================================================================*/
#define CREAL_T

typedef struct {
  real32_T re;
  real32_T im;
} creal32_T;

typedef struct {
  real64_T re;
  real64_T im;
} creal64_T;

typedef struct {
  real_T re;
  real_T im;
} creal_T;

#define CINT8_T

typedef struct {
  int8_T re;
  int8_T im;
} cint8_T;

#define CUINT8_T

typedef struct {
  uint8_T re;
  uint8_T im;
} cuint8_T;

#define CINT16_T

typedef struct {
  int16_T re;
  int16_T im;
} cint16_T;

#define CUINT16_T

typedef struct {
  uint16_T re;
  uint16_T im;
} cuint16_T;

#define CINT32_T

typedef struct {
  int32_T re;
  int32_T im;
} cint32_T;

#define CUINT32_T

typedef struct {
  uint32_T re;
  uint32_T im;
} cuint32_T;

/*=======================================================================*
 * Min and Max:                                                          *
 *   int8_T, int16_T, int32_T     - signed 8, 16, or 32 bit integers     *
 *   uint8_T, uint16_T, uint32_T  - unsigned 8, 16, or 32 bit integers   *
 *=======================================================================*/
#define MAX_int8_T                     ((int8_T)(127))
#define MIN_int8_T                     ((int8_T)(-128))
#define MAX_uint8_T                    ((uint8_T)(255U))
#define MAX_int16_T                    ((int16_T)(32767))
#define MIN_int16_T                    ((int16_T)(-32768))
#define MAX_uint16_T                   ((uint16_T)(65535U))
#define MAX_int32_T                    ((int32_T)(2147483647))
#define MIN_int32_T                    ((int32_T)(-2147483647-1))
#define MAX_uint32_T                   ((uint32_T)(0xFFFFFFFFU))

/* Block D-Work pointer type */
typedef void * pointer_T;

#endif                                 /* RTWTYPES_H */

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

二、代码生成的方式

代码生成的方式有三种，可通过以下方式进行选择。

三种代码生成方式的差异如下（rtwtypes.h固定生成的，不会被包含到其他文件中）：

实际上省去的只是文件的个数，内容并没有省掉，只是放到了其他文件中：

最后

以上就是耍酷月亮为你收集整理的Simulink代码生成（五）——代码生成文件的结构Simulink代码生成（五）——代码生成文件的结构一、代码生成的文件二、代码生成的方式的全部内容，希望文章能够帮你解决Simulink代码生成（五）——代码生成文件的结构Simulink代码生成（五）——代码生成文件的结构一、代码生成的文件二、代码生成的方式所遇到的程序开发问题。

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