PISO-P32C32

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Last updated Wednesday, 13-Aug-2003 16:45:41 CST

/dev/ixpion

The n is the PIO device number.

IXPIO_GET_INFO: Retrieve a device's information, and put it into the ixpio_devinfo (ixpio_devinfo_t) structure.
IXPIO_REG_READ: Read a specified register's value, and put the value into the ixpio_reg (ixpio_reg_t) structure.
IXPIO_REG_WRITE: Write a given value to a specified register.

ixpio_devinfo_t: The data type of structure ixpio_devinfo which contains information to represent a device (card). This structure is generally used by the ioctl IXPIO_GET_INFO command.
ixpio_reg_t: The data type of structure ixpio_reg that contains a register's id and value. This structure is used by the ioctl IXPIO_REG* commands.

Available registers that can be used in the ixpio_reg structure for the PISO-P32C32.

IXPIO_RCR: Reset Control Register (R/W)
IXPIO_ACR: AUX Control Register (R/W)
IXPIO_ADR: AUX Data Register (R/W)
IXPIO_IMCR: INT Mask Control Register (R/W)
IXPIO_ASR: AUX Pin Status Register (R/W) The ASR is directly handled by device driver. Write to the register is not recommended! Instead of directly write to it, use the IXPIO_SIG ioctl command to set the interrupt signaling condictions.
IXPIO_IPCR: Interrupt Polarity Control Register (R/W) The IPCR is directly heandled by device driver. Write to the register is not recommended! Instead of directly write to it, use the IXPIO_SIG ioctl command to set the interrupt signaling condictions.
IXPIO_DI: The whole digital inputs (R)
IXPIO_DO: The whole digital outputs (W)
IXPIO_DIO: The whole digital IO (R/W)
IXPIO_DIO_a: Digital IO group a. The a is the port group number, which generally represents an 8-bit digital port. For example, the IXPIO_DIO_A represents the DIO0-7, the IXPIO_DIO_B represents the DIO8-15, and so on in the same rule. Some devices (cards) have four groups (A, B, C, D), some haven't, which can be found from the hardware manual.