Canoe cannot automatically identify serial port number? Then encapsulate a DLL so that it must work

Preface

• For example, program-controlled power supply , Every colleague needs , But the project is the same , So every colleague before running the project , Choose different serial ports , This is very troublesome , Can you make CANoe Automatically identify the serial port number of the program-controlled power supply connected to the computer

• CAPL The built-in function of operating the serial port cannot automatically identify the serial port number , After searching for information , call Windows The equipment API It can be realized , Then I thought of packaging DLL, stay CANoe Call in DLL To achieve the goal .

• Demonstrate hardware and software environment Win10 x64 ; CANoe 11 SP2 x64 ;Visual Studio 2019

C++ Commissioning project

1️⃣ Old rules , encapsulation DLL Before that, let's create a new console project to debug the code

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2️⃣ The figure below , It's connected to my computer COM

• The description of connecting the program-controlled power supply to the computer is USB Serial Device (COMxx), that I can go through Key string USB Serial Device To implement filtering , To return to COM Number

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3️⃣ All the code , as follows ：

// PrintDeviceInfo.cpp :  Defines the entry point for the console application .
#include <stdio.h>
#include <stdlib.h>
#include <locale.h>
#include <Windows.h>
#include <setupapi.h>
#pragma comment(lib, "setupapi.lib")



int getSpecialComNum(const char* s, const char* t)
{
    
	char n = t[0];
	int l ,i,j, sourlen, tarlen;
	char temp[200] = {
     0 };
	char out[200] = {
     0 };

	sourlen = strlen(s);
	tarlen = strlen(t);


	for (i = 0; i < sourlen - tarlen + 1; i++)
	{
    
		for (j = 0; j < tarlen; j++)
		{
    

			if (s[i + j] != t[j])
			{
    
				break;
			}
		}
		if (j == tarlen)
		{
    

			return i+7; //find it
		}
	}
return -1;
}

// From the device information   Get the specific serial port number  @return <=0 Invalid 
int  getSpecialComNumFromDevInfo(char ComList[][200] ,  const char* SpecialCom ,int *ComNum)
{
    
	HDEVINFO hDevInfo = SetupDiGetClassDevs(NULL, NULL, NULL, DIGCF_PRESENT | DIGCF_ALLCLASSES);
	if (hDevInfo == INVALID_HANDLE_VALUE)
	{
    
		printf("SetupDiGetClassDevs Err:%d", GetLastError());
		return -2;
	};

	SP_CLASSIMAGELIST_DATA _spImageData = {
     0 };
	_spImageData.cbSize = sizeof(SP_CLASSIMAGELIST_DATA);
	SetupDiGetClassImageList(&_spImageData);

	SP_DEVINFO_DATA spDevInfoData = {
     0 };
	spDevInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
	int k;
	k = 0;

	for (DWORD i = 0; SetupDiEnumDeviceInfo(hDevInfo, i, &spDevInfoData); i++)
	{
    
		char  szBuf[MAX_PATH] = {
     0 };
		int  wImageIdx = 0;
		short  wItem = 0;
		char szBuf_byteToChar[256] = {
     0 };
		int j;
		
		if (!SetupDiGetDeviceRegistryPropertyA(hDevInfo, &spDevInfoData, SPDRP_CLASS, NULL, (PBYTE)szBuf, MAX_PATH, 0))
		{
    
			continue;
		};
		if (strcmp(szBuf, "Ports") != 0) // Port only 
		{
    			
			continue;
		}
		
		//printf("Class1:%s\r\n", szBuf);
		if (SetupDiGetClassImageIndex(&_spImageData, &spDevInfoData.ClassGuid, &wImageIdx))
		{
    
			char  szName[MAX_PATH] = {
     0 };
			DWORD  dwRequireSize;

			if (!SetupDiGetClassDescription(&spDevInfoData.ClassGuid, (PWSTR)szBuf, MAX_PATH, &dwRequireSize))
			{
    
				continue;
			};
			//wprintf(L"Class:%s\r\n", szBuf);

			if (SetupDiGetDeviceRegistryProperty(hDevInfo, &spDevInfoData, SPDRP_FRIENDLYNAME, NULL, (PBYTE)szName, MAX_PATH - 1, 0))
			{
    
				//wprintf(L"FriendlyName:%s\r\n\r\n", szName);

				sprintf_s(szBuf_byteToChar, "");
				for (j = 0; j < sizeof(szName); j++)
				{
    
					sprintf_s(szBuf_byteToChar, "%s%c", szBuf_byteToChar, szName[j]);
				}
			
				strcpy_s(ComList[k], szBuf_byteToChar);
				int comNum = getSpecialComNum(szBuf_byteToChar, SpecialCom);

				//wprintf(L"comNum:%s\r\n\r\n", comNum);
				k++;
				*ComNum = k;
				if (comNum > 0)
				{
    
					return comNum;
				}
			}
			else  if (SetupDiGetDeviceRegistryProperty(hDevInfo, &spDevInfoData, SPDRP_DEVICEDESC, NULL, (PBYTE)szName, MAX_PATH - 1, 0))
			{
    
				wprintf(L"Device:%s\r\n\r\n", szName);
			}
		}
	}
	SetupDiDestroyClassImageList(&_spImageData);
	return -1;
}

int  main(int  argc, char* argv[])
{
    

	char comList[50][200];
	char SpecialCom[100] = "USB Serial Device";
	int serialPortsNum;


	//printf("Locale is: %s\n", setlocale(LC_ALL, "chs"));
	printf(" Based on the description  %s, Find the serial port number :%d\n", SpecialCom,getSpecialComNumFromDevInfo(comList, SpecialCom, &serialPortsNum));
	printf(" Serial port number : %d\n", serialPortsNum);
	for (int i = 0; i < serialPortsNum; i++)
	{
    
		printf("%d: %s\n", i,comList[i]);
	}
	//PrintDevicesInfo2();
	getchar();
	return  0;
}

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4️⃣ Debug See the results of the next project , Back to what we wanted

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Encapsulated into DLL

• CANoe encapsulation DLL, I won't go into that here , Details can be found in CANoe DLL Programming series

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CANoe call DLL demonstration

1️⃣ Create a new NetWork Module Node

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2️⃣ can The code of the script is as follows ,：

Core function ：dllGetSeriesPorts(comList,SpecialComDescribtion,serialPortsNum);

• comList ： Return all the Port Description of mouth
• SpecialComDescribtion： Input parameters , Select to specify Port Description of mouth , such as Program controlled power supply COM The description is USB Serial Device
• serialPortsNum ： Input parameters , Back to all Ports Statistics of population

/*@!Encoding:936*/
includes
{
    
  #pragma library("autoSerialPort.dll") 
}


int connectSerialPort(char  SpecialComDescribtion[])
{
    
 	char comList[50][200];	
	long serialPortsNum;
  long retCom;
  int i ,RetVal;
  
  retCom =  dllGetSeriesPorts(comList,SpecialComDescribtion,serialPortsNum);
    
  write("Return COM Port:%d",retCom);
  
  write("Total COM Ports Number:%d",serialPortsNum);
  
  for ( i = 0; i < serialPortsNum; i++)
	{
    
		write("%d: %s", i,comList[i]);
	}
  RetVal = RS232Open(retCom);
  
  if (RetVal == 1 )
    write("Open port %d Ok.",retCom);
  else
    write("Open port %d failed.",retCom);
  
  RetVal = RS232Configure(retCom,9600,8,1,0 ); 

    if (RetVal == 1 )
    write("Configure port %d Ok.",retCom);
  else
    write("Configure port %d failed.",retCom);
  
 return RetVal;
}

on key 'k'
{
    
  connectSerialPort("USB Serial Device");
}

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3️⃣ The test results are as follows , Achieve the goal

End

summary

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