U2C_RESULT U2C_GetIoDirection(
HANDLE hDevice,
ULONG* pValue
);
The U2C_GetIoDirection() function obtains current input/output direction of the GPIO port pins.
Parameters:
- hDevice
Handle to the U2C-12 device.
- pValue
A pointer to unsigned long to be filled with the direction of the GPIO pins. pValue 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
Return values:
U2C_SUCCESS
The GPIO pins direction was successfully read.
U2C_HARDWARE_NOT_FOUND
U2C-12 device referenced by hDevice handle was not found.