52 lines
1.5 KiB
Plaintext
52 lines
1.5 KiB
Plaintext
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import processing.serial.*;
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Serial serialport;
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void setup() {
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printArray(Serial.list());
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serialport = new Serial(this, Serial.list()[2], 9600);
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println("start");
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}
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void draw() {
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byte[] inBuffer = new byte[9];
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while(serialport.available()>0) {
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inBuffer = serialport.readBytes();
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serialport.readBytes(inBuffer);
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if (inBuffer!= null) {
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int counter= inBuffer[0];
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int value1= extract_uint16_t(inBuffer,1);
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int value2= extract_int16_t(inBuffer,3);
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float floatvalue = extract_float(inBuffer,5);
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println("counter="+counter);
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println("value1="+value1);
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println("value2="+value2);
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println("floatvalue="+floatvalue);
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}
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}
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}
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public int extract_uint16_t(byte array[], int startbyte) {
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return ((int)array[startbyte] & 0xff) | ((int)array[startbyte+1] & 0xff)<<8;
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}
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public int extract_int16_t(byte array[], int startbyte) {
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if ( ((int)array[startbyte+1] & 0x80) == 0x00 ) { //2's complement, not negative
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return ( ((int)array[startbyte] & 0xff) | ((int)array[startbyte+1] & 0x7f)<<8 );
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}else{ //value is negative
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return -32768 + ( ((int)array[startbyte] & 0xff) | ((int)array[startbyte+1] & 0x7f)<<8 );
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}
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}
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public float extract_float(byte array[], int startbyte) {
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int MASK = 0xff;
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int bits = 0;
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int i = startbyte+3; //+3 because goes backwards and has 4 bytes
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for (int shifter = 3; shifter >= 0; shifter--) {
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bits |= ((int) array[i] & MASK) << (shifter * 8);
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i--;
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}
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return Float.intBitsToFloat(bits);
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}
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