HIDAPIHID 设备的 C 语言通用库
HIDAPI 是一个 USB 和蓝牙的 hid 类设备在 Windows、Linux、FreeBSD 和 Mac 的 C 语言通用库，使用 HIDAPI 可以在 Windows、Linux、FreeBSD 和 Mac 平台进行 USB 和蓝牙的 hid 类设备通信，非常简单实用。
示例代码：
#include <stdio.h>
#include <stdlib.h>
#include "hidapi.h"
int main(int argc, char* argv[])
{
int res;
unsigned char buf[65];
#define MAX_STR 255
wchar_t wstr[MAX_STR];
hid_device *handle;
int i;
// Enumerate and print the HID devices on the system
struct hid_device_info *devs, *cur_dev;
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("\n");
cur_dev = cur_dev->next;
}
hid_free_enumeration(devs);
// Open the device using the VID, PID,
// and optionally the Serial number.
handle = hid_open(0x4d8, 0x3f, NULL);
// Read the Manufacturer String
res = hid_get_manufacturer_string(handle, wstr, MAX_STR);
printf("Manufacturer String: %ls\n", wstr);
// Read the Product String
res = hid_get_product_string(handle, wstr, MAX_STR);
printf("Product String: %ls\n", wstr);
// Read the Serial Number String
res = hid_get_serial_number_string(handle, wstr, MAX_STR);
printf("Serial Number String: %ls", wstr);
printf("\n");
// Send a Feature Report to the device
buf[0] = 0x2; // First byte is report number
buf[1] = 0xa0;
buf[2] = 0x0a;
res = hid_send_feature_report(handle, buf, 17);
// Read a Feature Report from the device
buf[0] = 0x2;
res = hid_get_feature_report(handle, buf, sizeof(buf));
// Print out the returned buffer.
printf("Feature Report\n ");
for (i = 0; i < res; i++)
printf("%02hhx ", buf[i]);
printf("\n");
// Set the hid_read() function to be non-blocking.
hid_set_nonblocking(handle, 1);
// Send an Output report to toggle the LED (cmd 0x80)
buf[0] = 1; // First byte is report number
buf[1] = 0x80;
res = hid_write(handle, buf, 65);
// Send an Output report to request the state (cmd 0x81)
buf[1] = 0x81;
hid_write(handle, buf, 65);
// Read requested state
res = hid_read(handle, buf, 65);
if (res < 0)
printf("Unable to read()\n");
// Print out the returned buffer.
for (i = 0; i < res; i++)
printf("buf[%d]: %d\n", i, buf[i]);
return 0;
}
HIDAPI 有四个后端：
-
Windows (using hid.dll)
-
Linux/hidraw (using the Kernel's hidraw driver)
-
Linux/libusb (using libusb-1.0)
-
FreeBSD (using libusb-1.0)
-
Mac (using IOHidManager)
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