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221 lines
8.5 KiB
221 lines
8.5 KiB
/*******************************************************************************
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*
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* FindAppUART.cpp - PC command line utility for enumerating MSP430 EVM's
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* Application UARTs.
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*
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* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the
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* distribution.
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*
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* Neither the name of Texas Instruments Incorporated nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************/
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//------------------------------------------------------------------------------
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// Desc: PC command line utility for enumerating MSP430 EVM's Application UARTs.
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// The application returns the COM port number of the first UART that is
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// found. If this is successful the error code is set to '0'. In case of
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// the UART string could not be determined '1' is returned.
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//
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// The code was developed with the Express Edition of Visual C++ 2008
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// http://www.microsoft.com/express/
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//
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// Ver.: 0.1 (February 2011)
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// - Alpha version
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//
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// Auth: Andreas Dannenberg
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// MSP430 Applications
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// Texas Instruments, Inc.
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//------------------------------------------------------------------------------
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// Windows Header Files
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#define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff
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// from Windows headers
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#include <windows.h>
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#include <tchar.h>
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#include <shellapi.h>
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#include <setupapi.h> // "setupapi.lib" must be linked
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// to the project
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// C Runtime Header Files
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#include <stdlib.h>
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#include <malloc.h>
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#include <memory.h>
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//------------------------------------------------------------------------------
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// DWORD WINAPI EnumComPorts(DWORD dwIndex, LPTSTR lptszName,
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// DWORD dwNumOfElements)
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//
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// User-mode code fragment to identify attached VCP COMnn port[s] with a
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// specific device instance ID based on USB VID and PID and returns the COMnn
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// port that the OS embeds into the device instance ID. When called with
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// dwIndex = 0, the function will enumerate all COMPORT class devices and
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// return the name of the first one that was found. Subsequent calls using an
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// incremented dwIndex parameter can be performed until ERROR_NO_MORE_ITEMS
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// is returned.
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//
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// IN: dwIndex COMPORT class device # 0, 1, 2, ... to check
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// dwNumOfElements The size of the lptszName buffer
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// OUT: lptszName COMnn name of given device #
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// return() ERROR_SUCCESS - lpszName is valid
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// ERROR_NO_MORE_ITEMS - End of device list reached
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//------------------------------------------------------------------------------
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DWORD WINAPI EnumComPorts(DWORD dwIndex, LPTSTR lptszName, DWORD dwNumOfElements)
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{
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HDEVINFO hDevInfo;
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SP_DEVINFO_DATA DeviceInfoData;
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DWORD i;
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TCHAR *pcParse;
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// Create a HDEVINFO with all present devices
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hDevInfo = SetupDiGetClassDevs(
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NULL,
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0, // Enumerator
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0,
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DIGCF_PRESENT | DIGCF_ALLCLASSES);
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if (INVALID_HANDLE_VALUE == hDevInfo)
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{
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return GetLastError();
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}
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// Enumerate through all devices in set
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DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
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for (i = 0; SetupDiEnumDeviceInfo(hDevInfo, i, &DeviceInfoData); i++)
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{
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LPTSTR buffer = NULL;
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DWORD buffersize = 0;
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// Get the device instance ID that is associated with the device information element
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while (!SetupDiGetDeviceInstanceId(
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hDevInfo,
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&DeviceInfoData,
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buffer,
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buffersize,
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&buffersize))
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{
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if (buffer)
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{
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LocalFree(buffer);
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}
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if (ERROR_INSUFFICIENT_BUFFER == GetLastError())
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{
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// Change the buffer size. Double the size to avoid problems on
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// W2K MBCS systems per KB 888609.
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buffer = (LPTSTR)LocalAlloc(LPTR, buffersize * 2);
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}
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else
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{
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// Error: could not get device instance ID
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// Cleanup and return error code
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SetupDiDestroyDeviceInfoList(hDevInfo);
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return GetLastError();
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}
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}
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if (buffer)
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{
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// Look for the "Application UART" of common MSP430 EVMs. The application UART
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// has an USB VID of 0x0451 (Texas Instruments) and an PID of 0xF432.
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const TCHAR testval[] = _T("USB\\VID_0451&PID_F432&MI_00");
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if (NULL != _tcsstr(buffer, testval))
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{
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TCHAR szFriendlyName[MAX_PATH];
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if (SetupDiGetDeviceRegistryProperty(
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hDevInfo,
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&DeviceInfoData,
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SPDRP_FRIENDLYNAME,
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NULL,
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(PBYTE)szFriendlyName,
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sizeof(szFriendlyName) - 1,
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NULL))
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{
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// Check if we have reached the dwIndex-th element, if not keep looking
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if (dwIndex == 0)
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{
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// Find pointer to "COM" substring (secure)
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szFriendlyName[sizeof(szFriendlyName) - 1] = 0x00;
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pcParse = _tcsstr(szFriendlyName, _T("COM"));
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if (pcParse != NULL)
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{
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// Zero-terminate COM port string after last digit
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if (!isdigit(pcParse[4])) {
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pcParse[4] = 0;
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}
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else if (!isdigit(pcParse[5])) {
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pcParse[5] = 0;
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}
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else {
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pcParse[6] = 0;
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}
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// Pass string to the return parameter
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_tcscpy_s(lptszName, dwNumOfElements, pcParse);
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// Cleanup
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SetupDiDestroyDeviceInfoList(hDevInfo);
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return ERROR_SUCCESS;
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}
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}
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else
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{
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dwIndex--;
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}
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}
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}
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}
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}
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// Cleanup
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SetupDiDestroyDeviceInfoList(hDevInfo);
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return ERROR_NO_MORE_ITEMS;
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}
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//------------------------------------------------------------------------------
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// Main application entry point. Simply return the first Application UART
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// COM port that was found to STDOUT.
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//------------------------------------------------------------------------------
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int _tmain(int argc, _TCHAR* argv[])
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{
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TCHAR szDeviceName[MAX_PATH];
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DWORD dwReturnValue;
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dwReturnValue = EnumComPorts(0, szDeviceName, _countof(szDeviceName));
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if (dwReturnValue == ERROR_SUCCESS) {
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_ftprintf_s(stdout, _T("%s\r\n"), szDeviceName);
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return 0;
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}
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return 1;
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}
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