void loop() motorForward(); delay(2000); motorBrake(); delay(1000); motorReverse(); delay(2000); motorStop(); delay(1000);
void setup() pinMode(A1, OUTPUT); pinMode(A2, OUTPUT); pinMode(EN, OUTPUT); digitalWrite(EN, HIGH); // Enable driver
: Features two DB9 male RS-232 serial ports. Parallel Configuration : Features one DB25 female LPT port.
Because modern motherboards (especially from the last decade) have phased out built-in parallel ports to save space and streamline components, add-in cards like the PI40952 are the most reliable way to keep legacy hardware functional without having to upgrade the peripheral itself. Why the Right Driver Matters pi40952 3x2b driver
The PI40952 distinguishes itself from generic MOSFET drivers through integrated protection features: overcurrent shutdown, thermal warning, and cross-conduction prevention. It is often housed in a compact QFN or BGA package, making it suitable for dense PCB layouts.
The card is frequently used in industrial and legacy environments where serial communication is still vital for connecting devices such as: Point of Sale (POS) systems: Scanners, receipt printers, and credit card terminals. Industrial machinery: PLC programming cables and CNC machines. Networking equipment: Console cables for switches and routers. Physical Design
: Some later revisions or similar multiport cards use WCH (Nanjing Qinheng) chips like the CH382. If the Oxford driver doesn’t stick, try the CH38XDRV package from the manufacturer's site. Why Bother in 2026? Why are we still talking about serial ports? Why the Right Driver Matters The PI40952 distinguishes
If the card is already installed inside your desktop tower, you can extract its unique identifier string directly through the operating system:
The OXPCIe952 chipset has two principal ways of handling serial data:
In an era where everything is USB-C, the PI40952-3X2B is a reminder that serial ports (COM ports) still run the world's infrastructure. Whether you're connecting a POS system, a protocol converter, or an IoT device, this card provides a native PCI Express x1 a protocol converter
: 128-byte FIFO buffers with support for 16C950 UART standard and data transfer speeds up to 230.4 Kbps.
This modification requires advanced soldering skills. It will void your warranty. Do not attempt this if your card has an EEPROM chip (U2) soldered on, as the manufacturer may have customized the card, and standard drivers may not support the legacy mode after modification.