I tried the gpio-keys driver. I was able to count the interrupts, but was
not able to determine which pin. I tried the following code, but when I
hooked up switches to two pins the first switch I triggered would give the
correct code, but when I triggered the second switch it would give the code
for the first switch 4-5 times before it began giving the correct code.
using namespace std;
volatile int fd1 = 0;
volatile int counter1 = 0;
volatile int code = 0;
//volatile int value;
FILE *ifp_gpio30_value;
struct input_event event;
void IRQHandler(int sig){
counter1 ++;
read(fd1, &event, sizeof(struct input_event));
code = event.code;
counter1 ++;
}
int main(void){
struct sigaction saio;
fd1 = open("/dev/input/event1", O_RDWR|O_NONBLOCK);
saio.sa_handler = IRQHandler;
//saio.sa_mask = 0;
saio.sa_flags = 0;
saio.sa_restorer = NULL;
sigaction(SIGIO,&saio,NULL);
fcntl(fd1, F_SETOWN, getpid());
fcntl(fd1, F_SETFL, FASYNC);
while(1){
cout << counter1;
cout << "\t";
cout << code;
cout << "\n";
}
}
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