138 lines
2.7 KiB
C++
138 lines
2.7 KiB
C++
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#include "libusbwrapper.h"
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#include <libusb.h>
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#include <iostream>
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UsbDevice::UsbDevice(libusb_device *device)
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{
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int res;
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this->dev = device;
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res = libusb_get_device_descriptor(device, &this->devdesc);
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this->device_handle = nullptr;
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if (res == 0) {
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this->vendor_id = devdesc.idVendor;
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this->product_id = devdesc.idProduct;
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}
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}
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UsbDevice::UsbDevice(UsbDevice &&d)
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{
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vendor_id = std::move(d.vendor_id);
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product_id = std::move(d.product_id);
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dev = d.dev;
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devdesc = d.devdesc;
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device_handle = std::move(d.device_handle);
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}
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UsbDevice::~UsbDevice()
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{
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/* Nothing to do here. Our device handle will be automatically closed once the shared pointer is released */
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}
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std::vector<UsbDevice> UsbDevice::find_devices(uint16_t vendor_id, uint16_t product_id)
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{
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auto ret_vector = std::vector<UsbDevice>();
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libusb_device **devlist;
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int res = libusb_get_device_list(NULL, &devlist);
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if (res > 0) {
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for (int idx = 0; idx < res; idx++) {
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auto d = UsbDevice(devlist[idx]);
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if (d.get_product_id() == product_id && d.get_vendor_id() == vendor_id)
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ret_vector.push_back(std::move(d));
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}
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}
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return ret_vector;
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}
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bool UsbDevice::opened()
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{
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return !!(this->device_handle != nullptr);
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}
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int UsbDevice::open()
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{
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int ret;
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libusb_device_handle *handle;
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if (this->dev) {
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ret = libusb_open(this->dev, &handle);
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} else {
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handle = libusb_open_device_with_vid_pid(NULL, this->vendor_id, this->product_id);
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if (!handle)
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ret = -1;
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else
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ret = 0;
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}
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device_handle = std::make_shared<UsbDeviceHandle>(handle);
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return ret;
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}
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uint16_t UsbDevice::get_vendor_id()
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{
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return this->vendor_id;
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}
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uint16_t UsbDevice::get_product_id()
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{
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return this->product_id;
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}
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int UsbDevice::control_transfer(uint8_t request_type, uint8_t bRequest, uint16_t wValue, uint16_t wIndex, unsigned char *data, uint16_t wLength, unsigned int timeout)
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{
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if (!opened())
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return -1000;
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return libusb_control_transfer(this->device_handle->m_handle, request_type, bRequest, wValue, wIndex, data, wLength, timeout);
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}
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const std::string &UsbDevice::get_serial_number()
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{
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char buffer[256] = {0};
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if (!opened())
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return serial;
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if (devdesc.iSerialNumber == 0)
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return serial;
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if (serial.length() > 0) {
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return serial;
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}
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int res = libusb_get_string_descriptor_ascii(device_handle->m_handle, devdesc.iSerialNumber, (unsigned char *)buffer, 255);
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if (res > 0) {
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serial = std::string(buffer);
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return serial;
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} else {
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return serial;
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}
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}
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void LibUsbInit()
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{
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libusb_init(NULL);
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}
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void LibUsbDeInit()
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{
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libusb_exit(NULL);
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}
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UsbDeviceHandle::UsbDeviceHandle(libusb_device_handle *handle)
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{
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m_handle = handle;
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}
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UsbDeviceHandle::~UsbDeviceHandle()
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{
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if (m_handle)
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libusb_close(m_handle);
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m_handle = NULL;
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}
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