Problem with wiringpi

[Denos2000]

Good nights:

I have a problem and I have this code:

#include
#include
#include

int main(void)
{
int setup = 0;
setup = wiringPiSetupSys();
if(setup != -1)
{ while(1)
{
printf(“Waiting.\n”);
waitForInterrupt(7, -1);
printf(“Caught interrupt\n”);
}
}
return(EXIT_SUCCESS);
}

I compile the code and i don’t have any problem
gcc -o test main.c -lwiringPi

Later I do:
gpio edge 7 falling

I execute the program and the program don’t receive nothing and I have this:
Waiting.

I hope you can help me.

[texy]

Are you measuring the voltage on the correct pin?
Are you sure that what you think is 7 is the same 7 that the software is expecting?
T.

[Denos2000]

Good morning:

I'm sure I have number port gpio good

Thanks for your interest.

[jojopi]

Apart from the formatting issues because it is not in a

Code: Select all

 block, the program is correct.  It works for me.

[gordon@drogon.net]

Just to be sure - the pin7 referede to here is the SPI CE1 pin - that's physical pin 26 on the header.

You will also need to bias the pin to 3.3v to detect a falling level - unless the circuit you're driving it with alreasdy does that (ie. if it's a login output then you're fine, if a button you might not be). You can use the internal resistors - gpio -g mode 7 up.

Remember that in "Sys" mode (and using the gpio level command) the pin numbers are the native BCM_GPIO pin numbers and not the wiringPi pin numbers.

-Gordon