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Post By：2014-8-19 12:38:00 [只看该作者]
9280 板子的GPIO管脚控制LED，翻转，开始10来秒正常控制翻转，闪烁。
运行一段时间后就不能正常控制了，函数调用返回值为FALSE。下面2个函数都是一样的返回false.
public static bool GPIO_OutSet(int hISA_DIO, uint dwSetBits)
{
byte[] lpInBuf = BitConverter.GetBytes(dwSetBits);
uint lpBytesReturned = 0;
if (!DeviceIoControl(hISA_DIO,
// file handle to the driver
GPIO_IOCTL_OUT_SET,
// I/O control code
lpInBuf,
// in buffer
sizeof(uint),
// in buffer size
null,
// out buffer
0,
// out buffer size
ref lpBytesReturned,
// pointer to number of bytes returned
IntPtr.Zero))
// ignored (=NULL)
{
return false;
}
return true;
}
public static bool GPIO_OutClear(int hISA_DIO, uint dwClearBits)
{
byte[] lpInBuf = BitConverter.GetBytes(dwClearBits);
uint lpBytesReturned = 0;
if (!DeviceIoControl(hISA_DIO,
// file handle to the driver
GPIO_IOCTL_OUT_CLEAR,
// I/O control code
lpInBuf,
// in buffer
sizeof(uint),
// in buffer size
null,
// out buffer
0,
// out buffer size
ref lpBytesReturned,
// pointer to number of bytes returned
IntPtr.Zero))
// ignored (=NULL)
{
return false;
}
return true;
}
