test.c

test.c

#include <stdio.h>
#include <libusb.h>
#include <string.h>

int main(void)
{

    int r;
    libusb_device_handle* handle = NULL;
    uint8_t out_ep = 0x01;
    uint8_t in_ep = 0x81;
    int transferred = 0;

    r = libusb_init(NULL);
    if (r < 0)
        return r;

    handle = libusb_open_device_with_vid_pid(
            NULL,
            0x2FE3,0x09
        );
        
    char buf[64] = {};
    
    memcpy(buf, "test", 4);
        
    r = libusb_bulk_transfer(
                handle,
                out_ep,
                buf,
                4,
                &transferred,
                1000
            );
    printf("%i, transfer %i\n", r, transferred);
    r = libusb_bulk_transfer(
            handle,
            in_ep,
            buf,
            5,
            &transferred,
            1000
        );
    printf("%i, transfer %i\n", r, transferred);
    libusb_exit(NULL);
    return 0;
}

// build gcc test.c `pkg-config --libs --cflags libusb-1.0` -o test