Interrupts not working on Opi3 and OpiWin

[julgonmej]

Interrupts do not work on the Orange Pi 3 and Orange Pi Win (H6 boards) due to the gpio pin names/numbers: both boards use gpio ports with numbers between 300 and 400, while the watched file array (sysFds on wiringPi.c) has a size of 64 (it can only contain gpio ports from 0 to 63).

"gpio readall" output from OPI3, notice GPIO names:

 +------+-----+----------+------+---+   OPi 3  +---+------+----------+-----+------+
 | GPIO | wPi |   Name   | Mode | V | Physical | V | Mode | Name     | wPi | GPIO |
 +------+-----+----------+------+---+----++----+---+------+----------+-----+------+
 |      |     |     3.3V |      |   |  1 || 2  |   |      | 5V       |     |      |
 |  122 |   0 |    SDA.0 |  OFF | 0 |  3 || 4  |   |      | 5V       |     |      |
 |  121 |   1 |    SCL.0 |  OFF | 0 |  5 || 6  |   |      | GND      |     |      |
 |  118 |   2 |    PWM.0 |  OUT | 1 |  7 || 8  | 1 | ALT6 | PL02     | 3   | 354  |
 |      |     |      GND |      |   |  9 || 10 | 1 | IN   | PL03     | 4   | 355  |
 |  120 |   5 |    RXD.3 |  OFF | 0 | 11 || 12 | 0 | OFF  | PD18     | 6   | 114  |
 |  119 |   7 |    TXD.3 |  OFF | 0 | 13 || 14 |   |      | GND      |     |      |
 |  362 |   8 |     PL10 |  OFF | 0 | 15 || 16 | 0 | OFF  | PD15     | 9   | 111  |
 |      |     |     3.3V |      |   | 17 || 18 | 0 | OFF  | PD16     | 10  | 112  |
 |  229 |  11 |   MOSI.1 |  OFF | 0 | 19 || 20 |   |      | GND      |     |      |
 |  230 |  12 |   MISO.1 |  OFF | 0 | 21 || 22 | 0 | OFF  | PD21     | 13  | 117  |
 |  228 |  14 |   SCLK.1 |  OFF | 0 | 23 || 24 | 0 | OFF  | CE.1     | 15  | 227  |
 |      |     |      GND |      |   | 25 || 26 | 0 | OFF  | PL08     | 16  | 360  |
 +------+-----+----------+------+---+----++----+---+------+----------+-----+------+
 | GPIO | wPi |   Name   | Mode | V | Physical | V | Mode | Name     | wPi | GPIO |
 +------+-----+----------+------+---+   OPi 3  +---+------+----------+-----+------+

sysFds declaration (wiringPi.c:332)

static int sysFds [64] =
{
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
};

sysFds usage (wiringPi.c:2097): When using pin 3 on OPI3 (GPIO354), sysFds[354] is not defined, so interrupt is never configured.

if (sysFds [bcmGpioPin] == -1)
  {
    sprintf (fName, "/sys/class/gpio/gpio%d/value", bcmGpioPin) ;
    if ((sysFds [bcmGpioPin] = open (fName, O_RDWR)) < 0)
      return wiringPiFailure (WPI_FATAL, "wiringPiISR: unable to open %s: %s\n", fName, strerror (errno)) ;
  }