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#include #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：
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Windows (using hid.dll)
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Linux/hidraw (using the Kernel's hidraw driver)
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Linux/libusb (using libusb-1.0)
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FreeBSD (using libusb-1.0)
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Mac (using IOHidManager)
