Ming-Hua DP94 Series IC Card Reader Driver

Equipment Specifications
Communication interface:
Built-in RS232 serial port;
External RS232 serial port, TTL serial port or standard parallel port
Serial baud rate: 1200 ~ 115200BPS
Parallel transmission: All bytes (BYTE MODE) and semi-bytes (NIBBLE MODE)
Power: Built-DC5V ± 10%; external AC220V ± 10%
Maximum power consumption: 100 mW
Ambient temperature: 0 ℃ ~ 50 ℃
Relative Humidity: 30% ~ 95%
Size:
Built-in 138mm × 120mm × 25mm (LxWxH);
External 150mm × 118mm × 100mm (LxWxH)
Weight: Built-in about 200 grams; External approximately 500 grams

Reader FAQ
The user using the readers in the process of character or because of card reader interface with the computer is not enough to understand all kinds of problems arising here will have some answers to frequently asked questions in detail in order to reduce the time users to use our company the difficulty of writing device on the user's system development to provide more help.

In the WINDOWS / DOS programs running under serial port initialization why unsuccessful?
Most computers have two serial ports, called COM1 and COM2, and has its own fixed address, usually installed on a computer mouse in one of two serial ports will be occupied, so they are usually not installed in the case of other equipment there will be a statement reader installation. But sometimes in the installed network card or other devices installed on your computer reader will trigger a number of interrupt conflict that because they interrupt number (IRQ) or interrupt address (I / O) conflict, so need to re-configuration, that is, change the interrupt number or interrupt address. Otherwise, conflicts will lead to one of these two does not work properly.

Generic function will initialize the serial port ic_init, so that between the computer and the reader to establish normal communication. And to pay attention to preserve their return value, a connection should be returned "the number of 0. Return value will be used as a device identifier is used for other functions. So they are usually the return value as a global variable to use, and before exiting the program to ensure that calls the function ic_exit, to turn off the serial port, the only way to ensure that the whole process of running the serial port working order. If the return to -149, then to indicate it has not closed the case again to open serial port serial port.
In the development process on different platforms, which have their different requirements, please refer to the user provided routines.

Card read and write properly, but sometimes there was a communication timeout error?
Communication time-out phenomenon occurs often in reading and writing connection is not normal circumstances occur, so when this occurs reader should first check the connection if there are exceptions, and then check whether the serial port operation is correct, or the system has No other programs are also on the serial port to read and write operations may occur as the communications timeout.

M & W provides library functions which support?
The Company for the DOS, UNIX, Linux, FoxPro, WINDOWS version of the various development platforms to support libraries, including the. LIB static libraries (including the various models), PLB library and. DLL dynamic libraries (including 16-bit and 32-bit 2 kinds of version).