ADLINK cPCI-7432/7433/7434 isolated I/O card

Input channels: IDI-0~IDI-31, with every 8 channels sharing a COM terminal (COM1~COM4). For example, IDI_1~IDI_7 correspond to COM1, IDI_8~IDI_15 correspond to COM2, and so on.

Output channels: IDO-0~IDO-31, with every 8 channels sharing a VDD terminal (VDD1~VDD4) and a common IGND (output ground).

V5V: Onboard non regulated+5V power output (note current limitation, usually 200mA).

2. 7433（64DI）

All 64 pins are used for input channels IDI_~IDI_63, grouped in 8-channel groups, with each group sharing a COM terminal (COM1~COM8). No output function.

3. 7434（64DO）

All 64 pins are used for outputting channels IDO0-IDO-63, grouped in 8-channel groups, with each group sharing a VDD terminal (VDD1~VDD8) and a common IGND. No input function. CPCI-7434P/7434RP adopts a common source output, and the connection method is slightly different from the common ground version.

Wiring points:

All VDD pins must be connected to the positive pole (5-35V) of the external power supply, and IGND must be connected to the negative pole of the external power supply.

V5V is a non regulated 5V output from the board, which can supply power to a small number of low-power optocouplers or sensors, but please note that the total current does not exceed the board's capacity (200mA for 7432 output type and 150mA for 7434).

Register Structure and Programming Interface

The 743X series adopts 32-bit I/O mapping, and all register access must use 32-bit I/O instructions (8-bit or 16 bit access is not allowed). The base address is automatically assigned by PCI PnP BIOS and can be read through PCI configuration space offset 0x18h.

1. I/O address mapping

Address offset write operation read operation

Base+0x00 Output data (DO) Input data (DI low 32 bits)

Base+0x04 7434 High 32-bit DO/7432 Unused 7433 High 32-bit DI

Base+0x08 Clear Interrupt -

Base+0x40- Interrupt status

Base+0x50 LED control (R version) slot number (R version)

2. Digital input register (read-only)

7432: Base+0x00~0x03 corresponds to IDI0~IDI-31.

7433: Base+0x00~0x07 corresponds to IDI0~IDI-63 (the low 32 bits and high 32 bits need to be read twice).

3. Digital output register (write only)

7432: Base+0x00~0x03 corresponds to IDO0~IDO-31.

7434: Base+0x00~0x07 corresponds to IDO0~IDO-63 (which needs to be written in two parts: the low 32 bits and the high 32 bits).

Note: Whether the write operation is "write 1 output ON, write 0 output OFF" or vice versa depends on the output hardware structure (common ground or common source). 7432 common ground output (ULN2803A) is write 1 conductive (output low level), while 7434P common source output (TD62783) is write 1 output high level.

Interrupt system

7432 and 7433 (non 7434) support dual interrupt sources, which can be triggered by the rising or falling edge of input channel 0 (INT1) and channel 1 (INT2), respectively. Interrupt control process:

Configure interrupt source: Call _743X_Set-INT_Control (cardNo, int1Flag, int2Flag) to enable/disable INT1 and INT2 respectively.

Enable Interrupt (Windows 95): Call W_743X_INT_Snable, pass in two event handles, and when the corresponding interrupt occurs, the system will trigger the event object.

Get interrupt status: Call _743X_Get_IRQ_Status in the interrupt service routine to determine whether INT1 or INT2 is triggered.

Clear Interrupt: Write any value to Base+0x08 to clear the current interrupt request.

Interrupt application scenarios: such as event counting, emergency stop signal detection, watchdog timeout alarm, etc.

Rear I/O special function

For the cPCI-7432R/33R/34R/RP version, in addition to the standard CN1 front-end interface, it also has the following features:

LED control: Onboard 4 user programmable LEDs, controlled by the _743XR_LED (cardNo, LED_Sata) function, using only low bytes (Bit0~Bit3).

Slot number reading: By using the _743XR_SlotNo function to read the geographic address (GA0~GA4) of the cPCI backplane, the physical slot number of the current board can be obtained, which facilitates software self identification in multi card systems.

Compatibility warning: cPCI-743XR (rear wiring version) cannot be inserted into non-standard cPCI backplanes (such as other manufacturers' chassis) because the rear wiring pin definitions (J2/P2) may be different, and forced insertion may result in permanent damage.

Software Support and Programming Guide

ADLINK provides multi-level software support for the 743X series:

DOS libraries: Borland C/C++and Microsoft C++, functions are named with the prefix _743X_.

Windows 95 DLL: Functions are named with the W_743X_ prefix and support VB, VC++, and Delphi.

PCIS-DASK: Windows 98/NT/2000/XP kernel driver and DLL, with good binary compatibility.

Third party software: Provides LabVIEW VI, HP-VEE user objects, DAQBench ActiveX controls, as well as DDE Server, OPC Server, ISaGRAF/InControl drivers (some require licenses).

Core programming functions:

Function Name (Taking 7432 as an Example)

Initial_7431_Initial (&existCards,&pciInfo)

Read the number input_7432dI (cardNo,&di_data)

Write digital output _7432dO (cardNo, do_data)

Interrupt source configuration_7432_Set-INT_Control (cardNo, int1, int2)