Contact-Less Smart Card Reader & Mifare ONE CARD Secondary Development Documentation
Author: Dennis Lan Date: 2003/12/17 Copyright © UNIVERSAL MASTER Information Co (SZ). If Ltd, please explain the place to continue http://www.9cbs.net/develop/read_article.asp?id=22906
Eight. Add to the application (FORM)
Form Application Card: On the interface of the write card, such as "Personnel Data Card" plus a button, add the card in the button's when-Button-pressed, put the information you want to write, such as card number, etc. Procedure of writing card
Form Application Card: In the Form application, such as the card interface of the attendance, the trigger timing of his card read card is used to go to the CALL card reader, and read the Data on the IC in the induction area at a certain frequency.
Precautions for reading and writing IC cards FAQ:
1. How does the Smart Card Reader add the wrong computer? A: Show Message Tips Operator Contact System Administrator to connect Smart Card Reader in Com1 port
2. How do I have different workarounds for the computer's motherboard? A: Temporary has two solutions: the first method: first refer to BAUD RATE in the different computer motherboard COM1 port baud rate (this is good Performance) Advantages: Have better Performance. Disadvantages: The second method of modification is often required: Try the baud rate provided by Smart Card Reader in the program until the success is in an Array, The most commonly used in front, such as 115200, 19200, 14400, 288000 ...) Advantages: No need to modify the retrofitting for each computer; Disadvantages: Every time you start and Smart Card Reader, you need to spend a certain amount (depending on Array BAUD RATE) The order of order and the BAUD RATE of the COM Port on the computer motherboard, the longer the time after the time of the flower) time, and the disconnected application (such as attendance) is not suitable.
3. When is SMART Card Reader and Computer? A: When you need to perform read and write operation, then the Smart Card Reader, such as writing the card interface in the personnel data card, when pressing the button, read the scheme (take the candidate as an example : Establish a connection with Smart Card Reader when the Attendance Interface When-Windows-Activated
4. When is the Smart Card Reader and the computer are disconnected? A: When the read and write card interface is closed or deactivated, connect the connection to other applications. Take the attendance interface as an example: When the attendance interface is closed or deactivated, Corresponding Trigger is when-windows-deactivated, when-windows-close
5. How do you handle the Smart Card Reader on your computer? A: Add a total of a whole country in the app: paramter.devinstalled, log on whether there is a link in the computer (Note: COM Port) is not connected Equipment), the timing of changing this variable is: how much is the return of the returned device, if it is -32 indicates that there is no Smart Card Reader link, turn it: parameter.devinstalled is changed to 0, see this before each execution read and write The value of the number, if it is 0 to return; nothing.
6. How do you handle when port is occupied? A: If you have this error if you have an exit link with a Close or deActivated ate or deactivated, you will have this situation, showing this situation, show Message tells END-USER to close other read and write card applications to perform the current implementation of an error. 7. Do not unplug the Smart Card Reader in the middle of the program? A: Handling mode is 5, but also use the link to try, if the returned code = -32, change the devinstalled value to 0 no longer perform read and write Program, even if it is immediately connected, it is necessary to turn off the application to execute the read / write program.
8. When will I set the time and server synchronization displayed on the LCD of Smart Card Reader? A: Implement a set time after the SMART Card is successful
9. How to read and write cards or failure? A: When reading and writing cards, you can use Smart Card Reader's Beep function, if read and write success, beep (10), failed, beep (30) called Time is a bit.
Renewal ... Appendix: Reference information:
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