RFID-recharge consumption system

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Preface

       Radio Frequency Identification (RFID) is the abbreviation of Radio Frequency Identification.
       The principle is non-contact data communication between the reader and the tag to achieve the purpose of identifying the target. RFID has a wide range of applications. Typical applications include animal chips, car chip anti-theft devices, access control, parking lot control, production line automation, and material management.

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Tip: The following is the content of this article, the following cases are for reference

One, the compilation environment

       This system is based on VC++6.0 version. Readers who have not installed this software can download the software through Baidu Netdisk.
       Link: https://pan.baidu.com/s/1_pUq7swULst7plceOAQpSA
       Extraction code: l0x5

Second, realize the recharge consumption system

1. Create a project

        Open the software -> file -> new, you can see the interface below, follow the prompts in turn to complete the creation of the project! ! !

2. Add mwf32 related API documentation

(1) Copy the three files mwrf32.* under the API folder to the folder of the project you created.

   Related documents have been put into the entire system project! ! !

(2) Add header file

(3) Project -> Settings -> Connection -> Object/Library Module

3. Introduction to commonly used functions

    Function Description
rf_usbinit() Initialize the USB communication
rf_get_status() Get the version number
rf_load_key() Download the authorization password to the reader
rf_beep() Buzzer
rf_card() Find card
rf_authentication() Authentication
rf_write() Write card
rf_read() Read card
rf_halt() Terminate card operation
rf_exit() Close the serial port

4. Build the interface

   Select static text, edit box, button, list box through controls, build the following interface

5. Set variables

       Right click->Create Class Wizard->Member variables->Add Variable, select variable name and variable type

6. Write a program

       Double-click to read the card, initialize the information, recharge, and directly write the program after consumption.

(1) [Define global variables] The corresponding code is as follows:

	HANDLE icdev;
	int st;
	int sector=1;

	CString str1;	//余额
	CString str2;	//充值金额
	CString str3;	//消费金额

(2) [Reading card] The corresponding codes are as follows:

	icdev=rf_usbinit();
	if (icdev>0) {
    
    list.AddString("设备连接成功!");}
	else {
    
    list.AddString("连接失败!");}

	unsigned long snr;
	st=rf_card(icdev,1,&snr);
	if(st!=0) {
    
    list.AddString("请放置卡片!!!");}

    st=rf_authentication(icdev,0,sector);
	if(st!=0) {
    
    list.AddString("认证失败!");}

	//UpdateData();

	unsigned char databuff[17];
	ZeroMemory(databuff,17); 
	st=rf_read(icdev,sector*4,databuff);
	if(st==0) {
    
    list.AddString((char*)databuff);xingming=databuff;}

	st=rf_read(icdev,sector*4+1,databuff);
	if(st==0) {
    
    list.AddString((char*)databuff);xuehao=databuff;}

	st=rf_read(icdev,sector*4+2,databuff);
	str1=databuff;	//类型转换
	if(st==0) {
    
    list.AddString((char*)databuff);yue=atof(str1);}

	UpdateData(false);

	st=rf_halt(icdev);
	st=rf_exit(icdev); 
	//if(st==0) {list.AddString("断开连接!");}

(3) [Initialization information] The corresponding code is as follows:

	icdev=rf_usbinit();
	if (icdev>0) {
    
    list.AddString("设备连接成功!");}
	else {
    
    list.AddString("连接失败!");}

	unsigned long snr;
	st=rf_card(icdev,1,&snr);
	if(st!=0) {
    
    list.AddString("请放置卡片!!!");}

    st=rf_authentication(icdev,0,sector);
	if(st!=0) 
	{
    
    
		list.AddString("认证失败!");
	}
	
	else
	{
    
    
		UpdateData();
		str1.Format(_T("%.2f"),yue);	//余额

		char* data1=xingming.GetBuffer(xingming.GetLength());	//姓名
		char* data2=xuehao.GetBuffer(xuehao.GetLength());	//学号
		char* data3=str1.GetBuffer(str1.GetLength());	//余额

		st=rf_write(icdev,sector*4,(unsigned char*)data1);
		if(st==0) {
    
    list.AddString("写姓名成功!");}
		else {
    
    list.AddString("写姓名失败!");}

		st=rf_write(icdev,sector*4+1,(unsigned char*)data2);
		if(st==0) {
    
    list.AddString("写学号成功!");}
		else {
    
    list.AddString("写学号失败!");}

		st=rf_write(icdev,sector*4+2,(unsigned char*)data3);
		if(st==0) {
    
    list.AddString("写余额成功!");}
		else {
    
    list.AddString("写余额失败!");}

		unsigned char databuff[17];
		ZeroMemory(databuff,17);
		st=rf_read(icdev,sector*4,databuff);
		if(st==0) {
    
    list.AddString((char*)databuff);}
		st=rf_read(icdev,sector*4+1,databuff);
		if(st==0) {
    
    list.AddString((char*)databuff);}
		st=rf_read(icdev,sector*4+2,databuff);
		if(st==0) {
    
    list.AddString((char*)databuff);}

		UpdateData(false);
	}

	st=rf_halt(icdev);
	st=rf_exit(icdev); 
	//if(st==0) {list.AddString("断开连接!");}

(4) [Recharge] The corresponding code is as follows:

	icdev=rf_usbinit();

	unsigned long snr;
	st=rf_card(icdev,1,&snr);
	if(st!=0) {
    
    list.AddString("请放置卡片!!!");}

    st=rf_authentication(icdev,0,sector);
	if(st!=0) {
    
    list.AddString("认证失败!");}

	else	//读卡才能进行操作
	{
    
    
		UpdateData();
		yue=yue+chongzhi;	//充值
		chongzhi=0;	//充值置零
		str1.Format(_T("%.2f"),yue);	//余额
		str2.Format(_T("%.2f"),chongzhi);  //充值置零

		char* data3=str1.GetBuffer(str1.GetLength());	//余额
		st=rf_write(icdev,sector*4+2,(unsigned char*)data3);
		if(st==0) {
    
    list.AddString("充值成功!");}
		else {
    
    list.AddString("充值失败!");}

		unsigned char databuff[17];
		ZeroMemory(databuff,17);
		st=rf_read(icdev,sector*4+2,databuff);
		if(st==0) {
    
    list.AddString((char*)databuff);}

		UpdateData(false);
    }
	st=rf_halt(icdev);
	st=rf_exit(icdev); 
	//if(st==0) {list.AddString("断开连接!");}

(5) [Consumption] The corresponding code is as follows:

	icdev=rf_usbinit();
	unsigned long snr;
	st=rf_card(icdev,1,&snr);
	if(st!=0) {
    
    list.AddString("请放置卡片!!!");}

    st=rf_authentication(icdev,0,sector);
	if(st!=0) {
    
    list.AddString("认证失败!");}

	else	//读卡才能操作
	{
    
    
		UpdateData();
		yue=yue-xiaofei;	//消费
		xiaofei=0;	//消费置零
		str1.Format(_T("%.2f"),yue);	//消费
		str3.Format(_T("%.2f"),xiaofei);	//消费置零

		char* data3=str1.GetBuffer(str1.GetLength());	//余额
		st=rf_write(icdev,sector*4+2,(unsigned char*)data3);
		if(st==0) {
    
    list.AddString("消费成功!");}
		else {
    
    list.AddString("消费失败!");}

		unsigned char databuff[17];
		ZeroMemory(databuff,17);
		st=rf_read(icdev,sector*4+2,databuff);
		if(st==0) {
    
    list.AddString((char*)databuff);}

		UpdateData(false);
	}
	st=rf_halt(icdev);
	st=rf_exit(icdev); 
	//if(st==0) {list.AddString("断开连接!");}

You can download the project files of this system through Baidu network disk.
       Link: https://pan.baidu.com/s/1de7lseleJFXQEJ2XosY0Pg
       Extraction code: 4na5

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to sum up

       First of all, as a junior, I really feel so tired as a junior, as if I can't finish it. Haha, I really should make a complaint! ! ! As a small test of our RFID course, this recharge consumption system feels quite meaningful. It allows us to understand the basic principles of the so-called "swiping card" in our lives, and it really gives me the frog at the bottom of the well. I am about to graduate, and I wrote this blog to commemorate the passing RFID course. Maybe it's really goodbye~bye

can't reprint without my permission!!!