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/*
* PortHandlerWindows.c
*
* Created on: 2016. 5. 4.
* Author: leon
*/
#if defined(_WIN32) || defined(_WIN64)
#define WINDLLEXPORT
#endif
#include <stdio.h>
#include <string.h>
#include <time.h>
#include "dynamixel_sdk_windows/PortHandlerWindows.h"
#define LATENCY_TIMER 16 // msec (USB latency timer)
typedef struct
{
HANDLE serial_handle_;
LARGE_INTEGER freq_, counter_;
int baudrate_;
char port_name_[30];
double packet_start_time_;
double packet_timeout_;
double tx_time_per_byte_;
}PortDataWindows;
PortDataWindows *portDataWindows;
int PortHandlerWindows(const char *port_name)
{
int _port_num;
char _port_name[15];
sprintf_s(_port_name, sizeof(_port_name), "\\\\.\\", port_name);
if (portDataWindows == NULL)
{
_port_num = 0;
used_port_num_ = 1;
portDataWindows = (PortDataWindows*)calloc(1, sizeof(PortDataWindows));
is_using_ = (bool*)calloc(1, sizeof(bool));
}
else
{
for (_port_num = 0; _port_num < used_port_num_; _port_num++)
if (!strcmp(portDataWindows[_port_num].port_name_, port_name))
break;
if (_port_num == used_port_num_)
{
for (_port_num = 0; _port_num < used_port_num_; _port_num++)
if (portDataWindows[_port_num].serial_handle_ != INVALID_HANDLE_VALUE)
break;
if (_port_num == used_port_num_)
{
used_port_num_++;
portDataWindows = (PortDataWindows*)realloc(portDataWindows, used_port_num_ * sizeof(PortDataWindows));
is_using_ = (bool*)realloc(is_using_, used_port_num_ * sizeof(bool));
}
}
else
printf("[PortHandler setup] The port number %d has same device name... reinitialize port number %d!!\n", _port_num, _port_num);
}
portDataWindows[_port_num].serial_handle_ = INVALID_HANDLE_VALUE;
portDataWindows[_port_num].baudrate_ = DEFAULT_BAUDRATE;
portDataWindows[_port_num].packet_start_time_ = 0.0;
portDataWindows[_port_num].packet_timeout_ = 0.0;
portDataWindows[_port_num].tx_time_per_byte_ = 0.0;
is_using_[_port_num] = false;
SetPortNameWindows(_port_num, port_name);
return _port_num;
}
bool OpenPortWindows(int port_num)
{
return SetBaudRateWindows(port_num, portDataWindows[port_num].baudrate_);
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}
void ClosePortWindows(int port_num)
{
if (portDataWindows[port_num].serial_handle_ != INVALID_HANDLE_VALUE)
{
CloseHandle(portDataWindows[port_num].serial_handle_);
portDataWindows[port_num].serial_handle_ = INVALID_HANDLE_VALUE;
}
}
void ClearPortWindows(int port_num)
{
PurgeComm(portDataWindows[port_num].serial_handle_, PURGE_RXABORT | PURGE_RXCLEAR);
}
void SetPortNameWindows(int port_num, const char *port_name)
{
strcpy_s(portDataWindows[port_num].port_name_, sizeof(portDataWindows[port_num].port_name_), port_name);
}
char *GetPortNameWindows(int port_num)
{
return portDataWindows[port_num].port_name_;
}
bool SetBaudRateWindows(int port_num, const int baudrate)
{
ClosePortWindows(port_num);
portDataWindows[port_num].baudrate_ = baudrate;
return SetupPortWindows(port_num, baudrate);
}
int GetBaudRateWindows(int port_num)
{
return portDataWindows[port_num].baudrate_;
}
int ReadPortWindows(int port_num, UINT8_T *packet, int length)
{
DWORD _dwRead = 0;
if (ReadFile(portDataWindows[port_num].serial_handle_, packet, (DWORD)length, &_dwRead, NULL) == FALSE)
return -1;
return (int)_dwRead;
}
int WritePortWindows(int port_num, UINT8_T *packet, int length)
{
DWORD _dwWrite = 0;
if (WriteFile(portDataWindows[port_num].serial_handle_, packet, (DWORD)length, &_dwWrite, NULL) == FALSE)
return -1;
return (int)_dwWrite;
}
void SetPacketTimeoutWindows(int port_num, UINT16_T packet_length)
{
portDataWindows[port_num].packet_start_time_ = GetCurrentTimeWindows(port_num);
portDataWindows[port_num].packet_timeout_ = (portDataWindows[port_num].tx_time_per_byte_ * (double)packet_length) + (LATENCY_TIMER * 2.0) + 2.0;
}
void SetPacketTimeoutMSecWindows(int port_num, double msec)
{
portDataWindows[port_num].packet_start_time_ = GetCurrentTimeWindows(port_num);
portDataWindows[port_num].packet_timeout_ = msec;
}
bool IsPacketTimeoutWindows(int port_num)
{
if (GetTimeSinceStartWindows(port_num) > portDataWindows[port_num].packet_timeout_)
{
portDataWindows[port_num].packet_timeout_ = 0;
return true;
}
return false;
}
#undef GetCurrentTime
double GetCurrentTimeWindows(int port_num)
{
QueryPerformanceCounter(&portDataWindows[port_num].counter_);
QueryPerformanceFrequency(&portDataWindows[port_num].freq_);
return (double)portDataWindows[port_num].counter_.QuadPart / (double)portDataWindows[port_num].freq_.QuadPart * 1000.0;
}
double GetTimeSinceStartWindows(int port_num)
{
double _time;
_time = GetCurrentTimeWindows(port_num) - portDataWindows[port_num].packet_start_time_;
if (_time < 0.0)
portDataWindows[port_num].packet_start_time_ = GetCurrentTimeWindows(port_num);
return _time;
}
bool SetupPortWindows(int port_num, const int baudrate)
{
DCB dcb;
COMMTIMEOUTS timeouts;
DWORD dwError;
ClosePortWindows(port_num);
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portDataWindows[port_num].serial_handle_ = CreateFileA(portDataWindows[port_num].port_name_, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (portDataWindows[port_num].serial_handle_ == INVALID_HANDLE_VALUE)
{
printf("[PortHandlerWindows::SetupPort] Error opening serial port!\n");
return false;
}
dcb.DCBlength = sizeof(DCB);
if (GetCommState(portDataWindows[port_num].serial_handle_, &dcb) == FALSE)
goto DXL_HAL_OPEN_ERROR;
// Set baudrate
dcb.BaudRate = (DWORD)baudrate;
dcb.ByteSize = 8; // Data bit = 8bit
dcb.Parity = NOPARITY; // No parity
dcb.StopBits = ONESTOPBIT; // Stop bit = 1
dcb.fParity = NOPARITY; // No Parity check
dcb.fBinary = 1; // Binary mode
dcb.fNull = 0; // Get Null byte
dcb.fAbortOnError = 0;
dcb.fErrorChar = 0;
// Not using XOn/XOff
dcb.fOutX = 0;
dcb.fInX = 0;
// Not using H/W flow control
dcb.fDtrControl = DTR_CONTROL_DISABLE;
dcb.fRtsControl = RTS_CONTROL_DISABLE;
dcb.fDsrSensitivity = 0;
dcb.fOutxDsrFlow = 0;
dcb.fOutxCtsFlow = 0;
if (SetCommState(portDataWindows[port_num].serial_handle_, &dcb) == FALSE)
goto DXL_HAL_OPEN_ERROR;
if (SetCommMask(portDataWindows[port_num].serial_handle_, 0) == FALSE) // Not using Comm event
goto DXL_HAL_OPEN_ERROR;
if (SetupComm(portDataWindows[port_num].serial_handle_, 4096, 4096) == FALSE) // Buffer size (Rx,Tx)
goto DXL_HAL_OPEN_ERROR;
if (PurgeComm(portDataWindows[port_num].serial_handle_, PURGE_TXABORT | PURGE_TXCLEAR | PURGE_RXABORT | PURGE_RXCLEAR) == FALSE) // Clear buffer
goto DXL_HAL_OPEN_ERROR;
if (ClearCommError(portDataWindows[port_num].serial_handle_, &dwError, NULL) == FALSE)
goto DXL_HAL_OPEN_ERROR;
if (GetCommTimeouts(portDataWindows[port_num].serial_handle_, &timeouts) == FALSE)
goto DXL_HAL_OPEN_ERROR;
// Timeout (Not using timeout)
// Immediatly return
timeouts.ReadIntervalTimeout = 0;
timeouts.ReadTotalTimeoutMultiplier = 0;
timeouts.ReadTotalTimeoutConstant = 1; // must not be zero.
timeouts.WriteTotalTimeoutMultiplier = 0;
timeouts.WriteTotalTimeoutConstant = 0;
if (SetCommTimeouts(portDataWindows[port_num].serial_handle_, &timeouts) == FALSE)
goto DXL_HAL_OPEN_ERROR;
portDataWindows[port_num].tx_time_per_byte_ = (1000.0 / (double)portDataWindows[port_num].baudrate_) * 10.0;
return true;
DXL_HAL_OPEN_ERROR:
ClosePortWindows(port_num);