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jSerialComm
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Add calls to fetch modem line status

This commit is contained in:
hedgecrw85 2018-01-04 11:30:03 -06:00
parent c75e8d731b
commit 12855926d9
5 changed files with 78 additions and 0 deletions
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16
src/main/c/Android/jni/SerialPort_Android.c
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@ -575,4 +575,20 @@ JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_clearDTR(JNI
return (ioctl(serialPortFD, TIOCMBIC, &modemBits) == 0);
}
JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_getCTS(JNIEnv *env, jobject obj, jlong serialPortFD)
{
if (serialPortFD <= 0)
return JNI_FALSE;
int modemBits = 0;
return (ioctl(serialPortFD, TIOCMGET, &modemBits) == 0) && (modemBits & TIOCM_CTS);
}
JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_getDSR(JNIEnv *env, jobject obj, jlong serialPortFD)
{
if (serialPortFD <= 0)
return JNI_FALSE;
int modemBits = 0;
return (ioctl(serialPortFD, TIOCMGET, &modemBits) == 0) && (modemBits & TIOCM_LE);
}
#endif

16
src/main/c/Linux/SerialPort_Linux.c
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@ -534,4 +534,20 @@ JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_clearDTR(JNI
return (ioctl(serialPortFD, TIOCMBIC, &modemBits) == 0);
}
JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_getCTS(JNIEnv *env, jobject obj, jlong serialPortFD)
{
if (serialPortFD <= 0)
return JNI_FALSE;
int modemBits = 0;
return (ioctl(serialPortFD, TIOCMGET, &modemBits) == 0) && (modemBits & TIOCM_CTS);
}
JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_getDSR(JNIEnv *env, jobject obj, jlong serialPortFD)
{
if (serialPortFD <= 0)
return JNI_FALSE;
int modemBits = 0;
return (ioctl(serialPortFD, TIOCMGET, &modemBits) == 0) && (modemBits & TIOCM_LE);
}
#endif

16
src/main/c/OSX/SerialPort_OSX.c
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@ -553,4 +553,20 @@ JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_clearDTR(JNI
return (ioctl(serialPortFD, TIOCMBIC, &modemBits) == 0);
}
JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_getCTS(JNIEnv *env, jobject obj, jlong serialPortFD)
{
if (serialPortFD <= 0)
return JNI_FALSE;
int modemBits = 0;
return (ioctl(serialPortFD, TIOCMGET, &modemBits) == 0) && (modemBits & TIOCM_CTS);
}
JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_getDSR(JNIEnv *env, jobject obj, jlong serialPortFD)
{
if (serialPortFD <= 0)
return JNI_FALSE;
int modemBits = 0;
return (ioctl(serialPortFD, TIOCMGET, &modemBits) == 0) && (modemBits & TIOCM_LE);
}
#endif

18
src/main/c/Windows/SerialPort_Windows.c
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@ -682,4 +682,22 @@ JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_clearDTR(JNI
return EscapeCommFunction(serialPortHandle, CLRDTR);
}
JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_getCTS(JNIEnv *env, jobject obj, jlong serialPortFD)
{
HANDLE serialPortHandle = (HANDLE)serialPortFD;
if (serialPortHandle == INVALID_HANDLE_VALUE)
return JNI_FALSE;
DWORD modemStatus = 0;
return GetCommModemStatus(serialPortHandle, &modemStatus) && (modemStatus & MS_CTS_ON);
}
JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_getDSR(JNIEnv *env, jobject obj, jlong serialPortFD)
{
HANDLE serialPortHandle = (HANDLE)serialPortFD;
if (serialPortHandle == INVALID_HANDLE_VALUE)
return JNI_FALSE;
DWORD modemStatus = 0;
return GetCommModemStatus(serialPortHandle, &modemStatus) && (modemStatus & MS_DSR_ON);
}
#endif

12
src/main/java/com/fazecast/jSerialComm/SerialPort.java
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@ -456,6 +456,8 @@ public final class SerialPort
private final native boolean clearRTS(long portHandle); // Clear RTS line to 0
private final native boolean setDTR(long portHandle); // Set DTR line to 1
private final native boolean clearDTR(long portHandle); // Clear DTR line to 0
private final native boolean getCTS(long portHandle); // Returns whether the CTS signal is 1
private final native boolean getDSR(long portHandle); // Returns whether the DSR signal is 1
/**
* Returns the number of bytes available without blocking if {@link #readBytes} were to be called immediately
@ -540,6 +542,16 @@ public final class SerialPort
*/
public final boolean clearDTR() { return clearDTR(portHandle); }
/**
* @return Whether or not the CTS line is asserted.
*/
public final boolean getCTS() { return getCTS(portHandle); }
/**
* @return Whether or not the DSR line is asserted.
*/
public final boolean getDSR() { return getDSR(portHandle); }
// Default Constructor
private SerialPort() {}