Embest SBC8140, User Manual

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Id is the GPIO pin number; mode is the GPIO mode definition; the
following table lists all the mode definitions;
Mode Definitions Descriptions
GPIO_DIR_OUTPUT Output mode
GPIO_DIR_INPUT Output mode
GPIO_INT_LOW_HIGH Triggered on rising edge
GPIO_INT_HIGH_LOW Triggered on falling edge
GPIO_INT_LOW Triggered by low level
GPIO_INT_HIGH Triggered by high level
GPIO_DEBOUNCE_ENABLE Debounce enabled
5. Operations on GPIO pins
Operations on Pins
DWORD id = 0, pin = 0;
High Level Output
DeviceIoControl(hFile, IOCTL_GPIO_SETBIT, &id, sizeof(DWORD),
NULL, 0, NULL, NULL);
Low Level Output
DeviceIoControl(hFile, IOCTL_GPIO_CLRBIT, &id, sizeof(DWORD),
NULL, 0, NULL, NULL);
Read Status of Pins
DeviceIoControl(hFile, IOCTL_GPIO_GETBIT, &id, sizeof(DWORD),
&pin, sizeof(DWORD), NULL, NULL);
Id is the GPIO pin number; pin returns pin status.