generate a single interrupt on a How to generate a single interrupt on a floppy device?

Hello,

I want to be able to generate a single interrupt on a device which does not get interrupts very frequently.

A good candidate can be a floppy (bacause cat /proc/interrupts shows me that the number of interrupts does not increase during time).

Is there a way to generate a single interrupt on a floppy device?

I had tried the following:

I mount the floppy; I see that during the time, sometimes after running ls on a floppy

2 interrupts are generated; and sometimes after ls on a floppy no interrupts are generated. The same is with creating a file/reading a file: sometimes there are interrupts and sometimes there are no interrupts.

I of course check if interrups were generated by looking at cat /proc/interrupts. (and look at IRQ 6 of the floppy).

So I wrote the following little program:

#define BUFFER_SIZE 2048

char buffer[BUFFER_SIZE] __attribute__((aligned(4096)));

int main() {

int fd; int bytes_read; int i; fd = open("/dev/fd0",O_DIRECT);

void* data;

if (fd < 0 ) printf("could not open device\n");

else

printf("device opened\n");

{ bytes_read = read(fd,buffer,512);

//fseek(fd,SEEK_CUR,1); printf("bytes_read = %d\n",bytes_read); }

close(fd); }

Each time I ran it I got course : device opened bytes_read = 512

But running this program again and again ***DOES NOT*** increase the number of interrupt on the floppy device IRQ (6). Any ideas? Which operation should I do / which code I should write so that each time I will do it, it will generate an interrupt on the floppy IRQ (6) ?

(BTW I build this program by gcc -D_GNU_SOURCE floppy.c)

Regards, John