I changed the address for the variable containing 0 and I changed of
the number of bytes 1024 to 1 byte or 4 bytes like you said me. But
the result is the same
int main(){
struct usbdevfs_bulktransfer bulk;
int fd;
int ret,*data,dato=0xFF,interface=0x00,*inter;
data=&dato;
inter=&interface;
fd = open("/proc/bus/usb/002/003", O_RDWR);
if(fd != -1) {
bulk.ep = 1;
bulk.len = 1;
bulk.data = data;
bulk.timeout = 1000;
ioctl(fd, USBDEVFS_CLAIMINTERFACE, *inter);
perror("ioctl");
ret = ioctl(fd, USBDEVFS_BULK, &bulk);
perror("ioctl");
if (ret < 0)
printf("Error in bulk transfer\n");
/*else {
}*/
close(fd);
}
return 0;
Thank you
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