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android: replace using 'gpio' to direct node touching.

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This commit is contained in:
Luke Go
2019-07-30 09:33:23 +09:00
committed by Joshua Yang
parent ecb33ea61c
commit 6bb12bc532
1 changed files with 31 additions and 0 deletions
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31
wiringPi/wiringPi.c
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@@ -678,6 +678,7 @@ int wiringPiISR (int pin, int mode, void (*function)(void))
sprintf (pinS, "%d", GpioPin) ;
#ifndef __ANDROID__
if ((pid = fork ()) < 0) // Fail
return wiringPiFailure (
WPI_FATAL,
@@ -707,6 +708,36 @@ int wiringPiISR (int pin, int mode, void (*function)(void))
}
else // Parent, wait
wait (NULL) ;
#else
FILE *export, *direct, *edge;
export = fopen("/sys/class/gpio/export", "w") ;
fprintf (export, "%d\n", GpioPin) ;
fclose (export) ;
char fDirection[64];
sprintf (fDirection, "/sys/class/gpio/gpio%d/direction", GpioPin) ;
while ((direct= fopen(fDirection, "w")) == NULL) {
sleep(1);
}
fprintf (direct, "in\n") ;
fclose (direct) ;
char fEdge[64];
sprintf (fEdge, "/sys/class/gpio/gpio%d/edge", GpioPin) ;
while ((edge= fopen(fEdge, "w")) == NULL) {
sleep(1);
}
if (mode == INT_EDGE_FALLING)
fprintf (edge, "falling\n");
else if (mode == INT_EDGE_RISING)
fprintf (edge, "rising\n");
else if (mode == INT_EDGE_BOTH)
fprintf (edge, "both\n");
else
fprintf (edge, "none\n");
fclose (edge) ;
#endif
}
// Now pre-open the /sys/class node - but it may already be open if