DevKit8500D/A User Manual - DMCS Pages for Students

DeviceIoControl(hFile, IOCTL_GPIO_SETMODE, pInBuffer, sizeof(pInBuffer), NULL, 0, NULL, NULL);
4) Read the working mode of GPIO:
DeviceIoControl(hFile, IOCTL_GPIO_GETMODE, &id, sizeof(DWORD), &mode, sizeof(DWORD), NULL,
NULL);
"id" is GPIO Pin number, "mode" is GPIO mode, including:
Mode definition
GPIO_DIR_OUTPUT
GPIO_DIR_INPUT
GPIO_INT_LOW_HIGH
GPIO_INT_HIGH_LOW
GPIO_INT_LOW
GPIO_INT_HIGH
GPIO_DEBOUNCE_ENABLE
Description
Output mode
Input mode
Rising edge trigger mode
Falling edge trigger mode
low level trigger mode
high level trigger mode
Jumping trigger enable
5) The operation of GPIO Pin
DWORD id = 0, pin = 0;
6) Output high level:
DeviceIoControl(hFile, IOCTL_GPIO_SETBIT, &id, sizeof(DWORD), NULL, 0, NULL, NULL);
7) Output low level:
DeviceIoControl(hFile, IOCTL_GPIO_CLRBIT, &id, sizeof(DWORD), NULL, 0, NULL, NULL);
8) Read the pin state
DeviceIoControl(hFile, IOCTL_GPIO_GETBIT, &id, sizeof(DWORD), &pin, sizeof(DWORD), NULL, NULL);
"id" is GPIO pin number, "pin" returns to pin state
9) Other optional operation
Read the corresponding IRQ number of GPIO pin
DWORD id = 0, irq = 0;
DeviceIoControl(hFile, IOCTL_GPIO_GETIRQ, &id, sizeof(DWORD), &irq, sizeof(DWORD), NULL, NULL);
"id" is GPIO pin number, "irq" returns IRQ number
10) Close GPIO device
CloseHandle(hFile);
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