JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_configEventFlags(JNIEnv *env, jobject obj, jlong serialPortFD)
{
if (serialPortFD <= 0)
return JNI_FALSE;
// Get event flags from Java class
int baudRate = (*env)->GetIntField(env, obj, baudRateField);
unsigned int baudRateCode = getBaudRateCode(baudRate);
int eventsToMonitor = (*env)->GetIntField(env, obj, eventFlagsField);
// Change read timeouts if we are monitoring data received
jboolean retVal;
if ((eventsToMonitor & com_fazecast_jSerialComm_SerialPort_LISTENING_EVENT_DATA_RECEIVED) > 0)
{
struct termios options = { 0 };
ioctl(serialPortFD, TCGETS, &options);
int flags = fcntl(serialPortFD, F_GETFL);
if (flags == -1)
return JNI_FALSE;
flags &= ~O_NONBLOCK;
options.c_cc[VMIN] = 0;
options.c_cc[VTIME] = 10;
retVal = ((fcntl(serialPortFD, F_SETFL, flags) == -1) || (ioctl(serialPortFD, TCSETS, &options) == -1)) ?
JNI_FALSE : JNI_TRUE;
if (baudRateCode == 0) // Set custom baud rate
setBaudRate(serialPortFD, baudRate);
}
else
retVal = Java_com_fazecast_jSerialComm_SerialPort_configTimeouts(env, obj, serialPortFD);
// Apply changes
return retVal;
}
JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_configFlowControl(JNIEnv *env, jobject obj, jlong serialPortFD)
{
if (serialPortFD <= 0)
return JNI_FALSE;
struct termios options = { 0 };
// Get port parameters from Java class
int baudRate = (*env)->GetIntField(env, obj, baudRateField);
unsigned int baudRateCode = getBaudRateCode(baudRate);
int flowControl = (*env)->GetIntField(env, obj, flowControlField);
tcflag_t CTSRTSEnabled = (((flowControl & com_fazecast_jSerialComm_SerialPort_FLOW_CONTROL_CTS_ENABLED) > 0) ||
((flowControl & com_fazecast_jSerialComm_SerialPort_FLOW_CONTROL_RTS_ENABLED) > 0)) ? CRTSCTS : 0;
tcflag_t XonXoffInEnabled = ((flowControl & com_fazecast_jSerialComm_SerialPort_FLOW_CONTROL_XONXOFF_IN_ENABLED) > 0) ? IXOFF : 0;
tcflag_t XonXoffOutEnabled = ((flowControl & com_fazecast_jSerialComm_SerialPort_FLOW_CONTROL_XONXOFF_OUT_ENABLED) > 0) ? IXON : 0;
// Retrieve existing port configuration
if (isatty(serialPortFD))
ioctl(serialPortFD, TCGETS, &options);
else
return JNI_FALSE;
// Set updated port parameters
options.c_cflag |= CTSRTSEnabled;
options.c_iflag |= XonXoffInEnabled | XonXoffOutEnabled;
// Apply changes
int retVal = -1;
if (isatty(serialPortFD))
retVal = ioctl(serialPortFD, TCSETS, &options);
else
return JNI_FALSE;
if (baudRateCode == 0) // Set custom baud rate
setBaudRate(serialPortFD, baudRate);
return ((retVal == 0) ? JNI_TRUE : JNI_FALSE);
}
JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_configTimeouts(JNIEnv *env, jobject obj, jlong serialPortFD)
{
// Get port timeouts from Java class
if (serialPortFD <= 0)
return JNI_FALSE;
int baudRate = (*env)->GetIntField(env, obj, baudRateField);
unsigned int baudRateCode = getBaudRateCode(baudRate);
int timeoutMode = (*env)->GetIntField(env, obj, timeoutModeField);
int readTimeout = (*env)->GetIntField(env, obj, readTimeoutField);
// Retrieve existing port configuration
struct termios options = { 0 };
tcgetattr(serialPortFD, &options);
int flags = fcntl(serialPortFD, F_GETFL);
// Set updated port timeouts
if (((timeoutMode & com_fazecast_jSerialComm_SerialPort_TIMEOUT_READ_SEMI_BLOCKING) > 0) && (readTimeout > 0)) // Read Semi-blocking with timeout
{
flags &= ~O_NONBLOCK;
options.c_cc[VMIN] = 0;
options.c_cc[VTIME] = readTimeout / 100;
}
else if ((timeoutMode & com_fazecast_jSerialComm_SerialPort_TIMEOUT_READ_SEMI_BLOCKING) > 0) // Read Semi-blocking without timeout
{
flags &= ~O_NONBLOCK;
options.c_cc[VMIN] = 1;
options.c_cc[VTIME] = 0;
}
else if (((timeoutMode & com_fazecast_jSerialComm_SerialPort_TIMEOUT_READ_BLOCKING) > 0) && (readTimeout > 0)) // Read Blocking with timeout
{
flags &= ~O_NONBLOCK;
options.c_cc[VMIN] = 0;
options.c_cc[VTIME] = readTimeout / 100;
}
else if ((timeoutMode & com_fazecast_jSerialComm_SerialPort_TIMEOUT_READ_BLOCKING) > 0) // Read Blocking without timeout
{
flags &= ~O_NONBLOCK;
options.c_cc[VMIN] = 1;
options.c_cc[VTIME] = 0;
}
else if ((timeoutMode & com_fazecast_jSerialComm_SerialPort_TIMEOUT_SCANNER) > 0) // Scanner Mode
{
flags &= ~O_NONBLOCK;
options.c_cc[VMIN] = 1;
options.c_cc[VTIME] = 1;
}
else // Non-blocking
{
flags |= O_NONBLOCK;
options.c_cc[VMIN] = 0;
options.c_cc[VTIME] = 0;
}
// Apply changes
fcntl(serialPortFD, F_SETFL, flags);
int retVal = tcsetattr(serialPortFD, TCSANOW, &options);
if (baudRateCode == 0) // Set custom baud rate
setBaudRate(serialPortFD, baudRate);
return ((retVal == 0) ? JNI_TRUE : JNI_FALSE);
}
JNIEXPORT jboolean JNICALL Java_com_fazecast_jSerialComm_SerialPort_configPort(JNIEnv *env, jobject obj, jlong serialPortFD)
{
if (serialPortFD <= 0)
return JNI_FALSE;
struct termios options = { 0 };
// Get port parameters from Java class
int baudRate = (*env)->GetIntField(env, obj, baudRateField);
int byteSizeInt = (*env)->GetIntField(env, obj, dataBitsField);
int stopBitsInt = (*env)->GetIntField(env, obj, stopBitsField);
int parityInt = (*env)->GetIntField(env, obj, parityField);
tcflag_t byteSize = (byteSizeInt == 5) ? CS5 : (byteSizeInt == 6) ? CS6 : (byteSizeInt == 7) ? CS7 : CS8;
tcflag_t stopBits = ((stopBitsInt == com_fazecast_jSerialComm_SerialPort_ONE_STOP_BIT) || (stopBitsInt == com_fazecast_jSerialComm_SerialPort_ONE_POINT_FIVE_STOP_BITS)) ? 0 : CSTOPB;
tcflag_t parity = (parityInt == com_fazecast_jSerialComm_SerialPort_NO_PARITY) ? 0 : (parityInt == com_fazecast_jSerialComm_SerialPort_ODD_PARITY) ? (PARENB | PARODD) : (parityInt == com_fazecast_jSerialComm_SerialPort_EVEN_PARITY) ? PARENB : (parityInt == com_fazecast_jSerialComm_SerialPort_MARK_PARITY) ? (PARENB | CMSPAR | PARODD) : (PARENB | CMSPAR);
// Clear any serial port flags
if (isatty(serialPortFD))
fcntl(serialPortFD, F_SETFL, 0);
// Set raw-mode to allow the use of ioctl()
if (isatty(serialPortFD))
ioctl(serialPortFD, TCGETS, &options);
else
return JNI_FALSE;
cfmakeraw(&options);
// Set updated port parameters
options.c_cflag = (byteSize | stopBits | parity | CLOCAL | CREAD);
if (parityInt == com_fazecast_jSerialComm_SerialPort_SPACE_PARITY)
options.c_cflag &= ~PARODD;
options.c_iflag &= ~(INPCK | IGNPAR | PARMRK | ISTRIP);
if (byteSizeInt < 8)
options.c_iflag |= ISTRIP;
if (parityInt != 0)
options.c_iflag |= (INPCK | IGNPAR);
// Set baud rate
unsigned int baudRateCode = getBaudRateCode(baudRate);
if (baudRateCode != 0)
{
cfsetispeed(&options, baudRateCode);
cfsetospeed(&options, baudRateCode);
}
// Apply changes
int retVal = -1;
if (isatty(serialPortFD))
retVal = ioctl(serialPortFD, TCSETS, &options);
else
return JNI_FALSE;
if (baudRateCode == 0) // Set custom baud rate
setBaudRate(serialPortFD, baudRate);
return ((retVal == 0) ? JNI_TRUE : JNI_FALSE);
}
