Hi,
i'm actually trying to bulk write to a USB ticket printer.
The printer is reachable through /proc/bus/usb/001/002
You can see here some details on /var/log/messages:
sb 1-2: new full speed USB device using hc-crisv10 and address 2
usb 1-2: ep0 maxpacket = 8
usb 1-2: default language 0x0409
usb 1-2: new device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-2: Product: QL-550
usb 1-2: Manufacturer: Brother
usb 1-2: SerialNumber: A7G113560
usb 1-2: adding 1-2:1.0 (config #1, interface 0)
drivers/usb/core/inode.c: creating file '002'
hub 1-0:1.0: state 5 ports 2 chg 0000 evt 0004
hub 1-0:1.0: port 2 enable change, status 00000003
Here is the c code i'm compiling:
#include <usb.h>
#include <linux/ioctl.h>
#include <linux/usbdevice_fs.h>
#define O_RDWR 0x0002
int main(){
struct usbdevfs_bulktransfer bulk;
struct usbdevfs_ioctl ctrl;
int fd,ret,interface=0x00;
static unsigned char dato[4] = {0xFF, 0, 0, 0};
fd = open("/proc/bus/usb/001/002", O_RDWR);
if(fd != -1) {
//bulk.ep = USB_DIR_IN | 1;
bulk.ep = 1;
bulk.len = 4;
bulk.data = &dato;
bulk.timeout = 1000;
ioctl(fd, USBDEVFS_CLAIMINTERFACE, &interface);
perror("ioctl");
ioctl(fd, USBDEVFS_BULK, &bulk);
perror("ioctl");
close(fd);
}else
printf("Error opening");
return 0;
}
After compiling with the sdk here is the output when running on the fox
board:
ioctl: Success
ioctl: No such file or directory
Anyone has an idea of what is going wrong with my code ?
Anyone succeed to talk to a usb port using C or shell ?
Thanks in advance for any help.
