ODROID-XU3/4: Fix wiringPiISR.
If a pin is exported, ISR does not work on XU4.
We will clear pin before using with wiringPiISR function.
Signed-off-by: Steve Jeong <how2soft@gmail.com>
Change-Id: Ibc747fe30fda20253eb77d9bbe5f6bcc8c2180b8
diff --git a/wiringPi/wiringPi.c b/wiringPi/wiringPi.c
index 4d7b239..42e86ad 100644
--- a/wiringPi/wiringPi.c
+++ b/wiringPi/wiringPi.c
@@ -894,6 +894,14 @@
if (mode != INT_EDGE_SETUP) {
sprintf (pinS, "%d", GpioPin) ;
+ char temp[64];
+ sprintf(temp, "/sys/class/gpio/gpio%d", GpioPin);
+ if (access(temp, F_OK) == 0) {
+ FILE *unexport = fopen("/sys/class/gpio/unexport", "w");
+ fprintf (unexport, "%d\n", GpioPin);
+ fclose(unexport);
+ }
+
FILE *export, *direct, *edge;
int count;