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/**
@file ConnectionUSB.cpp
@author Lime Microsystems (www.limemicro.com)
@brief Data writing and reading through USB port
*/
#include "ConnectionUSB.h"
#include <string.h>
#ifdef __unix__
#include <thread>
#include <chrono>
#endif
#define USB_TIMEOUT 1000
#define HW_LDIGIRED L"DigiRed"
#define HW_LDIGIGREEN L"DigiGreen"
#define HW_LSTREAMER L"Stream"
#define HW_DIGIRED "DigiRed"
#define HW_DIGIGREEN "DigiGreen"
#define HW_STREAMER "Stream"
#define CTR_W_REQCODE 0xC1
#define CTR_W_VALUE 0x0000
#define CTR_W_INDEX 0x0000
#define CTR_R_REQCODE 0xC0
#define CTR_R_VALUE 0x0000
#define CTR_R_INDEX 0x0000
/** @brief Initializes port type and object necessary to communicate to usb device.
*/
ConnectionUSB::ConnectionUSB()
{
m_hardwareName = "";
isConnected = false;
m_connectionType = USB_PORT;
#ifndef __unix__
USBDevicePrimary = new CCyUSBDevice(NULL);
OutCtrEndPt = NULL;
InCtrEndPt = NULL;
InCtrlEndPt3 = NULL;
OutCtrlEndPt3 = NULL;
#else
dev_handle = 0;
devs = 0;
int r = libusb_init(&ctx); //initialize the library for the session we just declared
if(r < 0)
printf("Init Error %i\n", r); //there was an error
libusb_set_debug(ctx, 3); //set verbosity level to 3, as suggested in the documentation
#endif
currentDeviceIndex = -1;
}
/** @brief Closes connection to chip and deallocates used memory.
*/
ConnectionUSB::~ConnectionUSB()
{
Close();
#ifndef __unix__
delete USBDevicePrimary;
#else
libusb_exit(ctx);
#endif
}
/** @brief Automatically open first available chip connected to usb port.
@return 0-success, other-failure
*/
IConnection::DeviceStatus ConnectionUSB::Open()
{
currentDeviceIndex = -1;
if(m_deviceNames.size() == 0)
RefreshDeviceList();
#ifndef __unix__
for(int i=0; i<USBDevicePrimary->DeviceCount(); ++i)
if( Open(i) == SUCCESS)
{
currentDeviceIndex = i;
return SUCCESS;
}
#else
if(Open(0) == SUCCESS)
return SUCCESS;
#endif
return FAILURE;
}
/** @brief Tries to open connected USB device and find communication endpoints.
@return Returns 1-Success, 0-EndPoints not found or device didn't connect.
*/
IConnection::DeviceStatus ConnectionUSB::Open(unsigned index)
{
#ifndef __unix__
wstring m_hardwareDesc = L"";
if( index < USBDevicePrimary->DeviceCount())
{
if(USBDevicePrimary->Open(index))
{
m_hardwareDesc = USBDevicePrimary->Product;
unsigned int pos;
//determine connected board type
pos = m_hardwareDesc.find(HW_LDIGIRED, 0);
if( pos != wstring::npos )
m_hardwareName = HW_DIGIRED;
else if (m_hardwareDesc.find(HW_LSTREAMER, 0) != wstring::npos)
m_hardwareName = HW_STREAMER;
else
m_hardwareName = HW_STREAMER;
if (InCtrlEndPt3)
{
delete InCtrlEndPt3;
InCtrlEndPt3 = NULL;
}
InCtrlEndPt3 = new CCyControlEndPoint(*USBDevicePrimary->ControlEndPt);
if (OutCtrlEndPt3)
{
delete OutCtrlEndPt3;
OutCtrlEndPt3 = NULL;
}
OutCtrlEndPt3 = new CCyControlEndPoint(*USBDevicePrimary->ControlEndPt);
InCtrlEndPt3->ReqCode = CTR_R_REQCODE;
InCtrlEndPt3->Value = CTR_R_VALUE;
InCtrlEndPt3->Index = CTR_R_INDEX;
OutCtrlEndPt3->ReqCode = CTR_W_REQCODE;
OutCtrlEndPt3->Value = CTR_W_VALUE;
OutCtrlEndPt3->Index = CTR_W_INDEX;
for (int i=0; i<USBDevicePrimary->EndPointCount(); i++)
if(USBDevicePrimary->EndPoints[i]->Address == 0x01)
{
OutEndPt = USBDevicePrimary->EndPoints[i];
long len = OutEndPt->MaxPktSize * 64;
OutEndPt->SetXferSize(len);
break;
}
for (int i=0; i<USBDevicePrimary->EndPointCount(); i++)
if(USBDevicePrimary->EndPoints[i]->Address == 0x81)
{
InEndPt = USBDevicePrimary->EndPoints[i];
long len = InEndPt->MaxPktSize * 64;
InEndPt->SetXferSize(len);
break;
}
isConnected = true;
return SUCCESS;
} //successfully opened device
} //if has devices
return FAILURE;
#else
if(index >= 0 && index < m_dev_pid_vid.size())
{
dev_handle = libusb_open_device_with_vid_pid(ctx, m_dev_pid_vid[index].second, m_dev_pid_vid[index].first);
if(dev_handle == 0)
return FAILURE;
if(libusb_kernel_driver_active(dev_handle, 0) == 1) //find out if kernel driver is attached
{
printf("Kernel Driver Active\n");
if(libusb_detach_kernel_driver(dev_handle, 0) == 0) //detach it
printf("Kernel Driver Detached!\n");
}
int r = libusb_claim_interface(dev_handle, 0); //claim interface 0 (the first) of device
if(r < 0)
{
printf("Cannot Claim Interface\n");
return CANNOT_CLAIM_INTERFACE;
}
printf("Claimed Interface\n");
isConnected = true;
return SUCCESS;
}
else
{
return FAILURE;
}
#endif
}
/** @brief Closes communication to device.
*/
void ConnectionUSB::Close()
{
#ifndef __unix__
USBDevicePrimary->Close();
InEndPt = NULL;
OutEndPt = NULL;
if (InCtrlEndPt3)
{
delete InCtrlEndPt3;
InCtrlEndPt3 = NULL;
}
if (OutCtrlEndPt3)
{
delete OutCtrlEndPt3;
OutCtrlEndPt3 = NULL;
}
#else
if(dev_handle != 0)
{
libusb_release_interface(dev_handle, 0);
libusb_close(dev_handle);
dev_handle = 0;
}
#endif
isConnected = false;
}
/** @brief Returns connection status
@return 1-connection open, 0-connection closed.
*/
bool ConnectionUSB::IsOpen()
{
#ifndef __unix__
return USBDevicePrimary->IsOpen() && isConnected;
#else
return isConnected;
#endif
}
/** @brief Sends given data buffer to chip through USB port.
@param buffer data buffer, must not be longer than 64 bytes.
@param length given buffer size.
@param timeout_ms timeout limit for operation in milliseconds
@return number of bytes sent.
*/
int ConnectionUSB::Write(const unsigned char *buffer, const int length, int timeout_ms)
{
long len = length;
if(IsOpen())
{
unsigned char* wbuffer = new unsigned char[length];
memcpy(wbuffer, buffer, length);
if(m_hardwareName == HW_DIGIRED || m_hardwareName == HW_STREAMER)
{
#ifndef __unix__
if(OutCtrlEndPt3)
OutCtrlEndPt3->Write(wbuffer, len);
else
len = 0;
#else
len = libusb_control_transfer(dev_handle, LIBUSB_REQUEST_TYPE_VENDOR,CTR_W_REQCODE ,CTR_W_VALUE, CTR_W_INDEX, wbuffer, length, USB_TIMEOUT);
#endif
}
else
{
#ifndef __unix__
if(OutCtrEndPt)
OutCtrEndPt->XferData(wbuffer, len);
else
len = 0;
#else
int actual = 0;
libusb_bulk_transfer(dev_handle, 0x01, wbuffer, len, &actual, USB_TIMEOUT);
len = actual;
#endif
}
delete wbuffer;
}
else
return 0;
return len;
}
/** @brief Reads data coming from the chip through USB port.
@param buffer pointer to array where received data will be copied, array must be
big enough to fit received data.
@param length number of bytes to read from chip.
@param timeout_ms timeout limit for operation in milliseconds
@return number of bytes received.
*/
int ConnectionUSB::Read(unsigned char *buffer, const int length, int timeout_ms)
{
long len = length;
if(IsOpen())
{
if(m_hardwareName == HW_DIGIRED || m_hardwareName == HW_STREAMER)
{
#ifndef __unix__
if(InCtrlEndPt3)
InCtrlEndPt3->Read(buffer, len);
else
len = 0;
#else
len = libusb_control_transfer(dev_handle, LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN ,CTR_R_REQCODE ,CTR_R_VALUE, CTR_R_INDEX, buffer, len, USB_TIMEOUT);
#endif
}
else
{
#ifndef __unix__
if(InCtrEndPt)
InCtrEndPt->XferData(buffer, len);
else
len = 0;
#else
int actual = 0;
libusb_bulk_transfer(dev_handle, 0x81, buffer, len, &actual, USB_TIMEOUT);
len = actual;
#endif
}
}
return len;
}
#ifdef __unix__
/** @brief Function for handling libusb callbacks
*/
void callback_libusbtransfer(libusb_transfer *trans)
{
USBTransferContext *context = reinterpret_cast<USBTransferContext*>(trans->user_data);
switch(trans->status)
{
case LIBUSB_TRANSFER_CANCELLED:
printf("Transfer canceled\n" );
context->bytesXfered = trans->actual_length;
context->done = true;
context->used = false;
context->reset();
break;
case LIBUSB_TRANSFER_COMPLETED:
if(trans->actual_length == context->bytesExpected)
{
context->bytesXfered = trans->actual_length;
context->done = true;
}
//printf("Transfer complete %i\n", trans->actual_length);
break;
case LIBUSB_TRANSFER_ERROR:
printf("TRANSFER ERRRO\n");
break;
case LIBUSB_TRANSFER_TIMED_OUT:
printf("transfer timed out\n");
break;
case LIBUSB_TRANSFER_OVERFLOW:
printf("transfer overflow\n");
break;
case LIBUSB_TRANSFER_STALL:
printf("transfer stalled\n");
break;
}
context->mPacketProcessed.notify_one();
}
#endif
/** @brief Finds all chips connected to usb ports
@return number of devices found
*/
int ConnectionUSB::RefreshDeviceList()
{
#ifndef __unix__
USBDevicePrimary->Close();
currentDeviceIndex = -1;
m_deviceNames.clear();
string name;
if (USBDevicePrimary->DeviceCount())
{
for (int i=0; i<USBDevicePrimary->DeviceCount(); ++i)
{
Open(i);
name = DeviceName();
m_deviceNames.push_back(name);
}
currentDeviceIndex = -1;
}
#else
m_dev_pid_vid.clear();
m_deviceNames.clear();
int usbDeviceCount = libusb_get_device_list(ctx, &devs);
if(usbDeviceCount > 0)
{
libusb_device_descriptor desc;
for(int i=0; i<usbDeviceCount; ++i)
{
int r = libusb_get_device_descriptor(devs[i], &desc);
if(r<0)
printf("failed to get device description\n");
int pid = desc.idProduct;
int vid = desc.idVendor;
if( vid == 1204)
{
if(pid == 34323)
{
m_hardwareName = HW_DIGIGREEN;
m_deviceNames.push_back("DigiGreen");
m_dev_pid_vid.push_back( pair<int,int>(pid,vid));
}
else if(pid == 241)
{
m_hardwareName = HW_DIGIRED;
libusb_device_handle *tempDev_handle;
tempDev_handle = libusb_open_device_with_vid_pid(ctx, vid, pid);
if(libusb_kernel_driver_active(tempDev_handle, 0) == 1) //find out if kernel driver is attached
{
if(libusb_detach_kernel_driver(tempDev_handle, 0) == 0) //detach it
printf("Kernel Driver Detached!\n");
}
if(libusb_claim_interface(tempDev_handle, 0) < 0) //claim interface 0 (the first) of device
{
printf("Cannot Claim Interface\n");
}
string fullName;
//check operating speed
int speed = libusb_get_device_speed(devs[i]);
if(speed == LIBUSB_SPEED_HIGH)
fullName = "USB 2.0";
else if(speed == LIBUSB_SPEED_SUPER)
fullName = "USB 3.0";
else
fullName = "USB";
fullName += " (";
//read device name
char data[255];
memset(data, 0, 255);
int st = libusb_get_string_descriptor_ascii(tempDev_handle, 2, (unsigned char*)data, 255);
if(strlen(data) > 0)
fullName += data;
fullName += ")";
libusb_close(tempDev_handle);
m_deviceNames.push_back(fullName);
m_dev_pid_vid.push_back( pair<int,int>(pid,vid));
}
}
}
}
else
{
libusb_free_device_list(devs, 1);
return 0;
}
#endif
return m_deviceNames.size();
}
void ConnectionUSB::ClearComm()
{
}
/** @return name of currently opened device as string.
*/
string ConnectionUSB::DeviceName()
{
#ifndef __unix__
string name;
char tempName[USB_STRING_MAXLEN];
//memcpy(tempName, USBDevicePrimary->FriendlyName, USB_STRING_MAXLEN);
//name = tempName;
for (int i = 0; i < USB_STRING_MAXLEN; ++i)
tempName[i] = USBDevicePrimary->DeviceName[i];
if (USBDevicePrimary->bSuperSpeed == true)
name = "USB 3.0";
else if (USBDevicePrimary->bHighSpeed == true)
name = "USB 2.0";
else
name = "USB";
name += " (";
name += tempName;
name += ")";
return name;
#else
if(dev_handle != 0)
{
char data[255];
int st = libusb_get_string_descriptor_ascii(dev_handle, 2, (unsigned char*)data, 255);
return string(data);
}
return "no name";
#endif
}
/**
@brief Starts asynchronous data reading from board
@param *buffer buffer where to store received data
@param length number of bytes to read
@return handle of transfer context
*/
int ConnectionUSB::BeginDataReading(char *buffer, long length)
{
int i = 0;
bool contextFound = false;
//find not used context
for(i = 0; i<USB_MAX_CONTEXTS; i++)
{
if(!contexts[i].used)
{
contextFound = true;
break;
}
}
if(!contextFound)
return -1;
contexts[i].used = true;
#ifndef __unix__
if(InEndPt)
contexts[i].context = InEndPt->BeginDataXfer((unsigned char*)buffer, length, contexts[i].inOvLap);
return i;
#else
unsigned int Timeout = 1000;
libusb_transfer *tr = contexts[i].transfer;
libusb_fill_bulk_transfer(tr, dev_handle, 0x81, (unsigned char*)buffer, length, callback_libusbtransfer, &contexts[i], Timeout);
contexts[i].done = false;
contexts[i].bytesXfered = 0;
contexts[i].bytesExpected = length;
int status = libusb_submit_transfer(tr);
int actual = 0;
//int status = libusb_bulk_transfer(dev_handle, 0x81, (unsigned char*)buffer, length, &actual, USB_TIMEOUT);
if(status != 0)
printf("ERROR BEGIN DATA TRANSFER %s\n", libusb_error_name(status));
#endif
return i;
}
/**
@brief Waits for asynchronous data reception
@param contextHandle handle of which context data to wait
@param timeout_ms number of miliseconds to wait
@return 1-data received, 0-data not received
*/
int ConnectionUSB::WaitForReading(int contextHandle, unsigned int timeout_ms)
{
if( contexts[contextHandle].used == true && contextHandle >= 0)
{
int status = 0;
#ifndef __unix__
if(InEndPt)
status = InEndPt->WaitForXfer(contexts[contextHandle].inOvLap, timeout_ms);
return status;
#else
auto t1 = chrono::high_resolution_clock::now();
auto t2 = chrono::high_resolution_clock::now();
while(contexts[contextHandle].done == false && std::chrono::duration_cast<std::chrono::milliseconds>(t2 - t1).count() < timeout_ms)
{
struct timeval tv;
tv.tv_sec = 1;
tv.tv_usec = 0;
//if(libusb_handle_events(ctx) != 0)
if(libusb_handle_events_timeout_completed(ctx, &tv, NULL) != 0)
printf("error libusb_handle_events %i\n", status);
t2 = chrono::high_resolution_clock::now();
std::this_thread::sleep_for(std::chrono::milliseconds(1));
}
std::unique_lock<std::mutex> lck(contexts[contextHandle].m_lock);
while(contexts[contextHandle].done == false) //is changed in libusb callback
{
if(contexts[contextHandle].mPacketProcessed.wait_for(lck, std::chrono::milliseconds(timeout_ms)) == std::cv_status::timeout)
return 0;
}
return contexts[contextHandle].done == true;
#endif
}
else
return 0;
}
/**
@brief Finishes asynchronous data reading from board
@param buffer array where to store received data
@param length number of bytes to read, function changes this value to number of bytes actually received
@param contextHandle handle of which context to finish
@return false failure, true number of bytes received
*/
int ConnectionUSB::FinishDataReading(char *buffer, long &length, int contextHandle)
{
if( contexts[contextHandle].used == true && contextHandle >= 0)
{
#ifndef __unix__
int status = 0;
if(InEndPt)
status = InEndPt->FinishDataXfer((unsigned char*)buffer, length, contexts[contextHandle].inOvLap, contexts[contextHandle].context);
contexts[contextHandle].used = false;
contexts[contextHandle].reset();
return length;
#else
length = contexts[contextHandle].bytesXfered;
contexts[contextHandle].used = false;
contexts[contextHandle].reset();
return length;
#endif
}
else
return 0;
}
int ConnectionUSB::ReadDataBlocking(char *buffer, long &length, int timeout_ms)
{
#ifndef __unix__
return InEndPt->XferData((unsigned char*)buffer, length);
#else
return 0;
#endif
}
/**
@brief Aborts reading operations
*/
void ConnectionUSB::AbortReading()
{
#ifndef __unix__
InEndPt->Abort();
#else
for(int i=0; i<USB_MAX_CONTEXTS; ++i)
{
libusb_cancel_transfer( contexts[i].transfer );
}
#endif
}
/**
@brief Starts asynchronous data Sending to board
@param *buffer buffer to send
@param length number of bytes to send
@return handle of transfer context
*/
int ConnectionUSB::BeginDataSending(const char *buffer, long length)
{
int i = 0;
//find not used context
bool contextFound = false;
for(i = 0; i<USB_MAX_CONTEXTS; i++)
{
if(!contextsToSend[i].used)
{
contextFound = true;
break;
}
}
if(!contextFound)
return -1;
contextsToSend[i].used = true;
#ifndef __unix__
if(OutEndPt)
contextsToSend[i].context = OutEndPt->BeginDataXfer((unsigned char*)buffer, length, contextsToSend[i].inOvLap);
return i;
#else
unsigned int Timeout = 1000;
libusb_transfer *tr = contextsToSend[i].transfer;
//libusb_set_iso_packet_lengths(contexts[i].transfer, 512*64);
libusb_fill_bulk_transfer(tr, dev_handle, 0x1, (unsigned char*)buffer, length, callback_libusbtransfer, &contextsToSend[i], Timeout);
contextsToSend[i].done = false;
contextsToSend[i].bytesXfered = 0;
contextsToSend[i].bytesExpected = length;
libusb_submit_transfer(tr);
#endif
return i;
}
/**
@brief Waits for asynchronous data sending
@param contextHandle handle of which context data to wait
@param timeout_ms number of miliseconds to wait
@return 1-data received, 0-data not received
*/
int ConnectionUSB::WaitForSending(int contextHandle, unsigned int timeout_ms)
{
if( contextsToSend[contextHandle].used == true )
{
#ifndef __unix__
int status = 0;
if(OutEndPt)
status = OutEndPt->WaitForXfer(contextsToSend[contextHandle].inOvLap, timeout_ms);
return status;
#else
auto t1 = chrono::high_resolution_clock::now();
auto t2 = chrono::high_resolution_clock::now();
while(contextsToSend[contextHandle].done == false && std::chrono::duration_cast<std::chrono::milliseconds>(t2 - t1).count() < timeout_ms)
{
struct timeval tv;
tv.tv_sec = 1;
tv.tv_usec = 0;
int status = libusb_handle_events_timeout_completed(ctx, &tv, NULL);
if(status != 0)
printf("error libusb_handle_events %i\n", status);
t2 = chrono::high_resolution_clock::now();
std::this_thread::sleep_for(std::chrono::milliseconds(1));
}
std::unique_lock<std::mutex> lck(contextsToSend[contextHandle].m_lock);
while(contextsToSend[contextHandle].done == false) //is changed in libusb callback
{
if(contextsToSend[contextHandle].mPacketProcessed.wait_for(lck, std::chrono::milliseconds(timeout_ms)) == std::cv_status::timeout)
return 0;
}
return contextsToSend[contextHandle].done == true;
#endif
}
else
return 0;
}
/**
@brief Finishes asynchronous data sending to board
@param buffer array where to store received data
@param length number of bytes to read, function changes this value to number of bytes acctually received
@param contextHandle handle of which context to finish
@return false failure, true number of bytes sent
*/
int ConnectionUSB::FinishDataSending(const char *buffer, long &length, int contextHandle)
{
if( contextsToSend[contextHandle].used == true)
{
#ifndef __unix__
if(OutEndPt)
OutEndPt->FinishDataXfer((unsigned char*)buffer, length, contextsToSend[contextHandle].inOvLap, contextsToSend[contextHandle].context);
contextsToSend[contextHandle].used = false;
contextsToSend[contextHandle].reset();
return length;
#else
length = contextsToSend[contextHandle].bytesXfered;
contextsToSend[contextHandle].used = false;
contextsToSend[contextHandle].reset();
return length;
#endif
}
else
return 0;
}
/**
@brief Aborts sending operations
*/
void ConnectionUSB::AbortSending()
{
#ifndef __unix__
OutEndPt->Abort();
#else
for (int i = 0; i<USB_MAX_CONTEXTS; ++i)
{
libusb_cancel_transfer(contextsToSend[i].transfer);
}
for(int i=0; i<USB_MAX_CONTEXTS; ++i)
{
contextsToSend[i].used = false;
contextsToSend[i].reset();
}
#endif
}
int ConnectionUSB::GetOpenedIndex()
{
return currentDeviceIndex;
}
/** @brief Returns found devices names
@return vector of device names
*/
vector<string> ConnectionUSB::GetDeviceNames()
{
return m_deviceNames;
}