//获取行线索引
//get row pin index
private int ToIndex(GpioPin pin)
{
int result = -1;
for (int i = 0; i < _pins.Length; i++)
{
if (pin.Equals(_pins[i]))
{
result = i;
break;
}
}
if (0 > result)
{
throw new Exception("Unknow Pin Index");
}
else
{
return(result);
}
}