Ale Last :
I can not figure out where I may have been wrong and what to change to make this program able to communicate with the card both for reading and writing.
This is the serial protocol, the general structure of the frame is as follows:
LEN----------------->total number of frame characters
IND------------------>Indicator
ADDR_ST--------->station address
COD _OP--------->operation code
ADDR_DAT------->given address
NR_DATI---------->operation data number
DATI---------------->write operation data
CRC---------------->Check checksums
This is the frame that i send through the serial port:
byte miastringa[]={0x08,0x3f,0x00,0x42,0x00,0x01,0,cks};
This is the Code:
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.*;
//import javax.comm.*; // for SUN's serial/parallel port libraries
import gnu.io.*; // for rxtxSerial library
public class WriteReadSerialPort implements Runnable, SerialPortEventListener {
static CommPortIdentifier portId;
static CommPortIdentifier saveportId;
static Enumeration portList;
InputStream inputStream;
SerialPort serialPort;
Thread readThread;
byte cks= 0;
byte i;
byte cnt=0;
byte miastringa[]={0x08,0x3f,0x00,0x42,0x00,0x01,0,cks};
String messageString ="0";
static OutputStream outputStream;
static boolean outputBufferEmptyFlag = false;
public static void main(String[] args) {
boolean portFound = false;
String defaultPort;
// determine the name of the serial port on several operating systems
String osname = System.getProperty("os.name","").toLowerCase();
if ( osname.startsWith("windows") ) {
// windows
defaultPort = "COM8";
} else if (osname.startsWith("linux")) {
// linux
defaultPort = "/dev/ttyS0";
} else if ( osname.startsWith("mac") ) {
// mac
defaultPort = "????";
} else {
System.out.println("Sorry, your operating system is not supported");
return;
}
if (args.length > 0) {
defaultPort = args[0];
}
System.out.println("Set default port to "+defaultPort);
// parse ports and if the default port is found, initialized the reader
portList = CommPortIdentifier.getPortIdentifiers();
while (portList.hasMoreElements()) {
portId = (CommPortIdentifier) portList.nextElement();
if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
if (portId.getName().equals(defaultPort)) {
System.out.println("Found port: "+defaultPort);
portFound = true;
// init reader thread
WriteReadSerialPort reader = new WriteReadSerialPort();
}
}
}
if (!portFound) {
System.out.println("port " + defaultPort + " not found.");
}
}
public void initwritetoport() {
// initwritetoport() assumes that the port has already been opened and
// initialized by "public WriteReadSerialPort()"
try {
// get the outputstream
outputStream = serialPort.getOutputStream();
} catch (IOException e) {}
try {
// activate the OUTPUT_BUFFER_EMPTY notifier
serialPort.notifyOnOutputEmpty(true);
} catch (Exception e) {
System.out.println("Error setting event notification");
System.out.println(e.toString());
System.exit(-1);
}
}
public void writetoport() {
System.out.println("Writing \""+messageString+"\" to "+serialPort.getName());
try {
// write string to serial port
char[] crc_tab ={
0, 94, 188, 226, 97, 63, 221, 131, 194, 156, 126, 32, 163, 253, 31, 65,
157, 195, 33, 127, 252, 162, 64, 30, 95, 1, 227, 189, 62, 96, 130, 220,
35, 125, 159, 193, 66, 28, 254, 160, 225, 191, 93, 3, 128, 222, 60, 98,
190, 224, 2, 92, 223, 129, 99, 61, 124, 34, 192, 158, 29, 67, 161, 255,
70, 24, 250, 164, 39, 121, 155, 197, 132, 218, 56, 102, 229, 187, 89, 7,
219, 133, 103, 57, 186, 228, 6, 88, 25, 71, 165, 251, 120, 38, 196, 154,
101, 59, 217, 135, 4, 90, 184, 230, 167, 249, 27, 69, 198, 152, 122, 36,
248, 166, 68, 26, 153, 199, 37, 123, 58, 100, 134, 216, 91, 5, 231, 185,
140, 210, 48, 110, 237, 179, 81, 15, 78, 16, 242, 172, 47, 113, 147, 205,
17, 79, 173, 243, 112, 46, 204, 146, 211, 141, 111, 49, 178, 236, 14, 80,
175, 241, 19, 77, 206, 144, 114, 44, 109, 51, 209, 143, 12, 82, 176, 238,
50, 108, 142, 208, 83, 13, 239, 177, 240, 174, 76, 18, 145, 207, 45, 115,
202, 148, 118, 40, 171, 245, 23, 73, 8, 86, 180, 234, 105, 55, 213, 139,
87, 9, 235, 181, 54, 104, 138, 212, 149, 203, 41, 119, 244, 170, 72, 22,
233, 183, 85, 11, 136, 214, 52, 106, 43, 117, 151, 201, 74, 20, 246, 168,
116, 42, 200, 150, 21, 75, 169, 247, 182, 232, 10, 84, 215, 137, 107, 53};
//protocol
for(i=0; i<miastringa.length ; i++) {
cks += crc_tab[cks ^ miastringa[i]];
cks-=cks;
}
System.out.println("cks : "+ cks);
for(cnt=0; cnt<miastringa.length;cnt++) {
//miastringa[cnt++]=cks;
// miastringa[0]=cnt;
// miastringa[cnt]=0;
}
System.out.println("miastringa : "+ miastringa);
System.out.println("cnt : "+ cnt);
outputStream.write(miastringa);
} catch (IOException e) {}
}
public WriteReadSerialPort() {
// initalize serial port
try {
serialPort = (SerialPort) portId.open("SimpleReadApp", 4000);
} catch (PortInUseException e) {}
try {
inputStream = serialPort.getInputStream();
} catch (IOException e) {}
try {
serialPort.addEventListener(this);
} catch (TooManyListenersException e) {}
// activate the DATA_AVAILABLE notifier
serialPort.notifyOnDataAvailable(true);
try {
// set port parameters
serialPort.setSerialPortParams(19200, SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
} catch (UnsupportedCommOperationException e) {}
// start the read thread
readThread = new Thread(this);
readThread.start();
}
public void run() {
// first thing in the thread, we initialize the write operation
initwritetoport();
try {
while (true) {
// write string to port, the serialEvent will read it
writetoport();
Thread.sleep(1000);
}
} catch (InterruptedException e) {}
}
public void serialEvent(SerialPortEvent event) {
System.out.println(".............."+event.getEventType());
switch (event.getEventType()) {
case SerialPortEvent.BI:
System.out.println("BI");
case SerialPortEvent.OE:
System.out.println("OE");
case SerialPortEvent.FE:
System.out.println("FE");
case SerialPortEvent.PE:
System.out.println("PE");
case SerialPortEvent.CD:
System.out.println("CD");
case SerialPortEvent.CTS:
System.out.println("CTS");
case SerialPortEvent.DSR:
System.out.println("DSR");
case SerialPortEvent.RI:
System.out.println("RI");
case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
System.out.println("OUTPUT_BUFFER_EMPTY");
break;
case SerialPortEvent.DATA_AVAILABLE:
// we get here if data has been received
byte[] readBuffer = new byte[20];
try {
// read data
while (inputStream.available() > 0) {
int numBytes = inputStream.read(readBuffer);
}
// print data
String result = new String(readBuffer);
System.out.println("Read: "+result);
} catch (IOException e) {}
break;
}
}
The Console Log gives me this error:
Writing "0" to //./COM8
cks : 0
miastringa : [B@32cff37c
cnt : 8
..............2
OUTPUT_BUFFER_EMPTY
Thanks for the suggestions that will come
Aless1995 :
I've got a similar issue, you have to split the string into multiple parts and scroll through them in my case the following code worked:
Thread thread = new Thread() {
@Override
public void run() {
while (true) {
byte miastringacopy[] = {0X07, 0x3f, 0x01, 'b', 0x00, 0x08, 0x4f};
byte miastringa1copy[] = {0X07, 0x3f, 0x01, 'b', 0x01, 0x08, 0x4e};
byte miastringa2copy[] = {0X07, 0x3f, 0x01, 'b', 0x02, 0x08, 0x4d};
byte miastringa3copy[] = {0X07, 0x3f, 0x01, 'b', 0x03, 0x08, 0x4c};
if (co == 4) {
co = 0;
miastringa = miastringacopy;
miastringa1 = miastringa1copy;
miastringa2 = miastringa2copy;
miastringa3 = miastringa3copy;
}
try {
writeport();
Thread.sleep(100);
co++;
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
};
UsbSerialInterface.UsbReadCallback mCallback = new UsbSerialInterface.UsbReadCallback() { //Defining a Callback which triggers whenever data is read.
@Override
public void onReceivedData(byte[] readbuffer) {
// Get the port input stream.
byte readbuffer2[];
readbuffer2 = new byte[20];
// read data
int numBytes = readbuffer.length;
if(numBytes>=15) {
for (i = 0; i < readbuffer.length; i++) {
readbuffer2[i] = readbuffer[i];
}
if (co == 0) {
for (i = 0; i < 8; i++) {
outputBuffer1[i] = readbuffer2[i + 6];
}
}
if (co == 1) {
for (i = 0; i < 8; i++) {
outputBuffer1[i + 8] = readbuffer2[i + 6];
}
}
if (co == 2) {
for (i = 0; i < 8; i++) {
outputBuffer2[i] = readbuffer2[i + 6];
}
}
if (co == 3) {
for (i = 0; i < 8; i++) {
outputBuffer2[i + 8] = readbuffer2[i + 6];
}
}