Thread: reading stream of bytes from serial port

Hello.
I'm currently working on a project where I have to connect a camera to microcontroller and send a picture to PC.
The interfacing part is done but now I'm struggling with capturing the data on the PC side. Microcontroller sends a complete bmp file to PC in chunks: firstly header then info header and then data. And this is my problem I don't know how to capture all that and save it into bmp.

I appreciate any help
Regards
Kris

Can you just append each data chunk onto the end of an array or file?

Hi
Thank for the reply.

I am using java.comms package to communicate with microcontroller.
Yes my problem is with protocol.
I can read a single byte and send a byte but i have problems with reading loads of byte being sent at once. The data that are sent from microcontroller are image data that come from camera i connected to microcontroller so there is loads of data.

while(true){
            System.out.println("Enter command");
            while(in.hasNextInt()){
                i = in.nextInt();
                byte b = (byte)i;
                a.UARTputc(b);          //send command
 
                byte s = a.UARTgetb();  //check if something came back
                System.out.println(s);    //for debug
                if(s == 119){           //start of picture ascci for 'w'
                    do{
                        temp = a.UARTgetb();
                        pic[count] = temp;
                        count++;
                        System.out.println(count); //for debug
                    }while(temp != 10);//ascii for '\n'

this part i have now does not even get into the do-while loop

This is for reading the port:

        case SerialPortEvent.DATA_AVAILABLE:
            readBuffer = new byte[8];
 
                try {
                while (inputStream.available() > 0) {
                    int numBytes = inputStream.read(readBuffer);
                }
                int byteCount = 0;
                for (int i = 0; i < currentWrite.length; i++) {
                    if (currentWrite[i] == readBuffer[i]) {
                        byteCount++;
                    }
                }
                if (byteCount != currentWrite.length) {
                    dataIn = true;
                }
            } catch (IOException e) {System.out.println(e);}
            break;
        }

public void UARTputc(byte b) throws Exception{
        byte[] data = {b};
 
        sPort.write(data);
        utils.pause(100);
    }
 
    public byte UARTgetb(){
        byte t=0;
        byte b[] = sPort.read();
        t = b[0];
 
        return t;
    }

Any advice is appreciated

Regards