1 /**

     2  * cadMousePro

     3  * Copyright © 2019 František Kučera (Frantovo.cz, GlobalCode.info)

     4  *

     5  * This program is free software: you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation, either version 3 of the License, or

     8  * (at your option) any later version.

     9  *

    10  * This program is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

    13  * GNU General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU General Public License

    16  * along with this program. If not, see <http://www.gnu.org/licenses/>.

    17  */

    18 #pragma once

    19 

    20 #include <array>

    21 #include <vector>

    22 #include <memory>

    23 #include <unistd.h>

    24 #include <cassert>

    25 

    26 #include <hidapi/hidapi.h>

    27 

    28 using Packet = std::vector<uint8_t>;

    29 static_assert(sizeof (uint8_t) == sizeof (unsigned char)); // unsigned char is used in the HID API library

    30 

    31 class HIDException {

    32 private:

    33 	std::wstring message;

    34 public:

    35 

    36 	HIDException(std::wstring message) : message(message) {

    37 	}

    38 

    39 	virtual ~HIDException() {

    40 	}

    41 

    42 	const std::wstring getMessage() const {

    43 		return message;

    44 	}

    45 

    46 };

    47 

    48 class HIDDevice {

    49 private:

    50 	std::shared_ptr<hid_device> handle;

    51 

    52 public:

    53 

    54 	HIDDevice(unsigned short vendorId, unsigned short productId, const wchar_t *serialNumber) {

    55 		int initError = hid_init(); // TODO: move to HIDContext class?

    56 		if (initError) throw HIDException(L"Unable to init HID API.");

    57 		handle.reset(hid_open(vendorId, productId, serialNumber), hid_close);

    58 		if (handle == nullptr) throw HIDException(L"Unable to open HID device. Are you root? Is the device present?");

    59 	}

    60 

    61 	virtual ~HIDDevice() {

    62 		hid_exit(); // TODO: move to HIDContext class?

    63 	}

    64 

    65 	const std::wstring getManufacturerName() const {

    66 		std::array<wchar_t, 200 > buffer;

    67 		int error = hid_get_manufacturer_string(handle.get(), buffer.data(), buffer.size());

    68 		if (error) throw HIDException(L"Unable to get manufacturer name.");

    69 		return buffer.data();

    70 	}

    71 

    72 	const std::wstring getProductName() const {

    73 		std::array<wchar_t, 200 > buffer;

    74 		int error = hid_get_product_string(handle.get(), buffer.data(), buffer.size());

    75 		if (error) throw HIDException(L"Unable to get product name.");

    76 		return buffer.data();

    77 	}

    78 

    79 	const std::wstring getSerialNumber() const {

    80 		std::array<wchar_t, 200 > buffer;

    81 		int error = hid_get_serial_number_string(handle.get(), buffer.data(), buffer.size());

    82 		if (error) throw HIDException(L"Unable to get serial number.");

    83 		return buffer.data();

    84 	}

    85 

    86 	void sendFeatureReport(Packet data) {

    87 		int written = hid_send_feature_report(handle.get(), data.data(), data.size());

    88 		if (written < 0) throw HIDException(L"Unable to send feature report.");

    89 	}

    90 

    91 };