U2C_RESULT U2C_SetIoDirection(
HANDLE hDevice,
ULONG Value,
ULONG Mask
);
The U2C_SetIoDirection() function configures input/output direction of the GPIO port pins.
Parameters:
- hDevice
Handle to the U2C-12 device.
- Value
An unsigned long value specifying the direction of the GPIO pins. Value is treated as unsigned long 0xXXCCBBAA, where CC, BB and AA correspond to the C, B and A port pins:
Bit set to 1 indicates configuration of the corresponding pin as output. Bit set to 0 indicates configuration of the corresponding pin as input.- AA bits 7..0 correspond to Port A pins 7..0
- BB bits 7..0 correspond to Port B pins 7..0
- CC bits 7..0 correspond to Port C pins 7..0
- XX bits 7..0 reserved
- Mask
An unsigned long value specifying the data mask to use when modifying the GPIO pins direction. The mask value allows modification of the desired pins only, leaving rest of the pins unchanged. The bit mapping for Mask parameter is exactly the same as for Value parameter. Only direction of the pins with the mask bit set to 1 will be changed.
Return values:
U2C_SUCCESS
The GPIO pins direction was successfully modified.
U2C_HARDWARE_NOT_FOUND
U2C-12 device referenced by hDevice handle was not found.