178 lines
4.8 KiB
C
178 lines
4.8 KiB
C
/*
|
|
Copyright (c) 2014 Guillaume Duc <guillaume@guiduc.org>
|
|
Modifications copyright (c) 2020 Alex Lewontin <alex.c.lewontin@gmail.com>
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files (the "Software"), to deal
|
|
in the Software without restriction, including without limitation the rights
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included in all
|
|
copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
SOFTWARE.
|
|
|
|
*/
|
|
|
|
#include "hidapi.h"
|
|
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/signal.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
|
|
#define USB_HID_IN_REPORT_SIZE 1
|
|
#define USB_HID_OUT_REPORT_SIZE 1
|
|
|
|
struct usb_hid_in_report_s {
|
|
uint8_t sequence_number;
|
|
};
|
|
|
|
struct usb_hid_out_report_s {
|
|
uint8_t sequence_number;
|
|
};
|
|
|
|
static uint8_t usb_hid_in_report_buf[USB_HID_IN_REPORT_SIZE];
|
|
/* +1 for the report index */
|
|
static uint8_t usb_hid_out_report_buf[USB_HID_OUT_REPORT_SIZE + 1];
|
|
|
|
static struct usb_hid_in_report_s* usb_hid_in_report =
|
|
(struct usb_hid_in_report_s*)usb_hid_in_report_buf;
|
|
|
|
static struct usb_hid_out_report_s* usb_hid_out_report =
|
|
(struct usb_hid_out_report_s*)(&usb_hid_out_report_buf[1]);
|
|
|
|
static hid_device* handle;
|
|
|
|
static void close_hidapi() __attribute__((noreturn));
|
|
static void close_client() __attribute__((noreturn));
|
|
|
|
static void read_in_report()
|
|
{
|
|
int res, i;
|
|
|
|
printf("read()\n");
|
|
res = hid_read(handle, usb_hid_in_report_buf, USB_HID_IN_REPORT_SIZE);
|
|
if (res < 0) {
|
|
perror("read");
|
|
exit(EXIT_FAILURE);
|
|
} else {
|
|
printf("read() read %d bytes:\t", res);
|
|
for (i = 0; i < res; i++)
|
|
printf("%02hhx ", usb_hid_in_report_buf[i]);
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
static void send_out_report()
|
|
{
|
|
int res;
|
|
|
|
usb_hid_out_report_buf[0] = 0;
|
|
|
|
res =
|
|
hid_write(handle, usb_hid_out_report_buf, USB_HID_OUT_REPORT_SIZE + 1);
|
|
if (res < 0) {
|
|
perror("write");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
usb_hid_out_report->sequence_number++;
|
|
}
|
|
|
|
static void close_hidapi()
|
|
{
|
|
int res = hid_exit();
|
|
if (res) {
|
|
perror("Could not close hidapi library");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
static void close_client()
|
|
{
|
|
hid_close(handle);
|
|
close_hidapi();
|
|
}
|
|
|
|
int main(int argc, char** argv)
|
|
{
|
|
int res;
|
|
unsigned long vid, pid;
|
|
struct hid_device_info *devs, *cur_dev;
|
|
|
|
if (argc < 2) {
|
|
fprintf(stderr, "Usage: %s [VID] [PID]\n", argv[0]);
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
vid = strtoul(argv[1], NULL, 16);
|
|
pid = strtoul(argv[2], NULL, 16);
|
|
|
|
devs = hid_enumerate(0x0, 0x0);
|
|
cur_dev = devs;
|
|
while (cur_dev) {
|
|
printf("Device Found\n type: %04hx %04hx\n path: %s\n serial_number: "
|
|
"%ls",
|
|
cur_dev->vendor_id,
|
|
cur_dev->product_id,
|
|
cur_dev->path,
|
|
cur_dev->serial_number);
|
|
printf("\n");
|
|
printf(" Manufacturer: %ls\n", cur_dev->manufacturer_string);
|
|
printf(" Product: %ls\n", cur_dev->product_string);
|
|
printf(" Release: %hx\n", cur_dev->release_number);
|
|
printf(" Interface: %d\n", cur_dev->interface_number);
|
|
printf(" Usage (page): 0x%hx (0x%hx)\n",
|
|
cur_dev->usage,
|
|
cur_dev->usage_page);
|
|
printf("\n");
|
|
cur_dev = cur_dev->next;
|
|
}
|
|
hid_free_enumeration(devs);
|
|
|
|
/* Make sure we clean up on CTRL-C interrupt */
|
|
signal(SIGINT, close_client);
|
|
|
|
res = hid_init();
|
|
if (res) {
|
|
perror("Could not load hidapi library");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
handle = hid_open(vid, pid, NULL);
|
|
if (!handle) {
|
|
perror("Unable to open device");
|
|
close_hidapi();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
usb_hid_out_report->sequence_number = 4;
|
|
send_out_report();
|
|
|
|
while (1) {
|
|
read_in_report();
|
|
|
|
if (usb_hid_in_report->sequence_number == 40) {
|
|
usb_hid_out_report->sequence_number =
|
|
usb_hid_in_report->sequence_number / 2;
|
|
send_out_report();
|
|
}
|
|
}
|
|
}
|