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189 lines
6.3 KiB
189 lines
6.3 KiB
/*-------------------------------------------------------------------------
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| rxtx is a native interface to serial ports in java.
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| Copyright 2002-2004 Michal Hobot MichalHobot@netscape.net
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| Copyright 1997-2004 by Trent Jarvi taj@parcelfarce.linux.theplanet.co.uk
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| This library is free software; you can redistribute it and/or
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| modify it under the terms of the GNU Library General Public
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| License as published by the Free Software Foundation; either
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| version 2 of the License, or (at your option) any later version.
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| This library is distributed in the hope that it will be useful,
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| but WITHOUT ANY WARRANTY; without even the implied warranty of
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| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| Library General Public License for more details.
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| You should have received a copy of the GNU Library General Public
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| License along with this library; if not, write to the Free
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| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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--------------------------------------------------------------------------*/
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#include "StdAfx.h"
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#include "rxtxHelpers.h"
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/*
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nativeGetVersion
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accept: none
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perform: return the current version
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return: version
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exceptions: none
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comments: This is used to avoid mixing versions of the .jar and
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native library.
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First introduced in rxtx-1.5-9
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* Class: gnu_io_RXTXCommDriver
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* Method: nativeGetVersion
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* Signature: ()Ljava/lang/String;
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*/
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JNIEXPORT jstring JNICALL Java_gnu_io_RXTXCommDriver_nativeGetVersion(JNIEnv *env, jclass cls)
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{
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return env->NewStringUTF("RXTX-2.0-1");
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}
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/*
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registerKnownPorts
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accept: the type of port
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perform: register any ports of the desired type a priori known to this OS
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return: JNI_TRUE if any such ports were registered otherwise JNI_FALSE
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exceptions: none
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comments:
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* Class: gnu_io_RXTXCommDriver
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* Method: registerKnownPorts
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* Signature: (I)Z
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*/
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JNIEXPORT jboolean JNICALL Java_gnu_io_RXTXCommDriver_registerKnownPorts(JNIEnv *env, jobject jobj, jint portType)
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{
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enum {PORT_TYPE_SERIAL = 1,
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PORT_TYPE_PARALLEL,
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PORT_TYPE_I2C,
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PORT_TYPE_RS485,
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PORT_TYPE_RAW};
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jboolean result = JNI_FALSE;
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switch(portType) {
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case PORT_TYPE_SERIAL:
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// We could check here what COMs are on system and register them.
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break;
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case PORT_TYPE_PARALLEL:
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case PORT_TYPE_I2C:
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case PORT_TYPE_RS485:
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case PORT_TYPE_RAW:
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break;
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default:
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// Wrong port type - I'd raise exception, but there's no defined for Java
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IF_DEBUG
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(
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printj(env, L"!!! RXTXCommDriver.registerKnownPorts(%ld): Wrong port type\n", portType);
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//MessageBox(NULL, TEXT("RXTXCommDriver.registerKnownPorts(): Wrong port type"), TEXT("Error"), MB_OK);
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)
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break;
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}
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return result;
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}
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/*
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isPortPrefixValid
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accept: a port prefix
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perform: see if the port prefix matches a port that is valid on this OS.
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return: JNI_TRUE if it exists otherwise JNI_FALSE
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exceptions: none
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comments:
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* Class: gnu_io_RXTXCommDriver
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* Method: isPortPrefixValid
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* Signature: (Ljava/lang/String;)Z
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*/
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JNIEXPORT jboolean JNICALL Java_gnu_io_RXTXCommDriver_isPortPrefixValid(JNIEnv *env, jobject jobj, jstring dev)
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{
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jboolean retVal;
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const char *szDev = env->GetStringUTFChars(dev, NULL);
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if( strncmp(szDev, "COM", 3) == 0 || strncmp(szDev, "LPT", 3) == 0) // is first 3 chars OK?
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retVal = JNI_TRUE;
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else
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retVal = JNI_FALSE;
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env->ReleaseStringUTFChars(dev, szDev);
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return retVal;
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}
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/*
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testRead
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accept: dev The device to be tested
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perform: test if the device can be read from
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return: JNI_TRUE if the device can be read from
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exceptions: none
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comments: From Wayne Roberts wroberts1@home.com
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check tcget/setattr returns.
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support for non serial ports Trent
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* Class: gnu_io_RXTXCommDriver
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* Method: testRead
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* Signature: (Ljava/lang/String;I)Z
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*/
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JNIEXPORT jboolean JNICALL Java_gnu_io_RXTXCommDriver_testRead(JNIEnv *env, jobject jobj, jstring dev, jint type)
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{
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jboolean retVal;
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DWORD dwError;
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if ( type == PORT_SERIAL )
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{
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const WCHAR *wszDev = env->GetStringChars(dev, NULL);
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HANDLE hPort = CreateFileW(wszDev, // Pointer to the name of the port
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GENERIC_READ | GENERIC_WRITE,
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// Access (read-write) mode
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0, // Share mode
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NULL, // Pointer to the security attribute
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OPEN_EXISTING,// How to open the serial port
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0, // Port attributes
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NULL); // Handle to port with attribute
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// to copy
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// If it fails to open the port, return FALSE.
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if ( hPort == INVALID_HANDLE_VALUE )
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{ // Could not open the port.
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IF_DEBUG
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(
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;//printj(env, TEXT("!!! RXTXCommDriver.testRead(%s, %ld): cannot open port\n"), wszDev, type);
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//MessageBox(NULL, TEXT("RXTXCommDriver.testRead(): cannot open port"), wszDev /*TEXT("Error")*/, MB_OK | MB_SETFOREGROUND);
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)
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dwError = GetLastError();
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retVal = JNI_FALSE;
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}
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else
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{ // Port open OK - let's close it and return TRUE
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if (!CloseHandle(hPort))
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dwError = GetLastError();
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IF_DEBUG
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(
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;//printj(env, TEXT("--- RXTXCommDriver.testRead(%s, %ld): port open OK\n"), wszDev, type);
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//MessageBox(NULL, TEXT("RXTXCommDriver.testRead(): port open OK"), wszDev /*TEXT("Success")*/, MB_OK | MB_SETFOREGROUND);
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)
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retVal = JNI_TRUE;
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}
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env->ReleaseStringChars(dev, wszDev);
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}
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else
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retVal = JNI_FALSE;
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return retVal;
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}
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/*
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getDeviceDirectory
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accept:
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perform:
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return: the directory containing the device files
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exceptions:
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comments: we need it only for Unix
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* Class: gnu_io_RXTXCommDriver
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* Method: getDeviceDirectory
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* Signature: ()Ljava/lang/String;
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*/
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JNIEXPORT jstring JNICALL Java_gnu_io_RXTXCommDriver_getDeviceDirectory(JNIEnv *env, jobject jobj)
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{
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return env->NewStringUTF("");
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}
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