serial data communication between Matlab and Arduino

Hi,

I have an example of serial data communication between Matlab and Arduino. I'm trying to write this code in Matlab but it's seems it's not right.

Here's Arduino code:

// Create a union to easily convert float to byte

typedef union{

float number;

uint8_t bytes[4];

} FLOATUNION_t;

// Create the variables you want to receive

FLOATUNION_t myValue1;

FLOATUNION_t myValue2;

FLOATUNION_t myValue3;

FLOATUNION_t myValue4;

FLOATUNION_t myValue5;

FLOATUNION_t myValue6;

// Create the variables to send

FLOATUNION_t send1;

FLOATUNION_t send2;

FLOATUNION_t send3;

void setup() {

// initialize serial, use the same boudrate in the Simulink Config block

Serial.begin(115200);

}

void loop(){

// Get the floats from serial

myValue1.number = getFloat(); // Give your float a value

myValue2.number = getFloat(); // Give your float a value

myValue3.number = getFloat(); // Give your float a value

myValue4.number = getFloat(); // Give your float a value

myValue5.number = getFloat(); // Give your float a value

myValue6.number = getFloat(); // Give your float a value

// Send some variables back

send1.number = myValue1.number+myValue2.number;

send2.number = myValue3.number+myValue4.number;

send3.number = myValue5.number+myValue6.number;

// Print header: Important to avoid sync errors!

Serial.write('A');

// Print float data

for (int i=0; i<4; i++){

Serial.write(send1.bytes[i]);

}

for (int i=0; i<4; i++){

Serial.write(send2.bytes[i]);

}

for (int i=0; i<4; i++){

Serial.write(send3.bytes[i]);

}

// Print terminator

Serial.print('\n');

// Use the same delay in the Serial Receive block

delay(50);

}

float getFloat(){

int cont = 0;

FLOATUNION_t f;

while (cont < 4 ){

f.bytes[cont] = Serial.read() ;

cont = cont +1;

}

return f.number;

}

And here's Matlab Code, which doesn't see correct:

clear

clc

close all

newobjs = instrfind;

fclose(newobjs);

s=serial('COM5','BaudRate',115200);

fopen(s);

readData=fscanf(s); %reads "Ready"

writedata=uint16(500); %0x01F4

fwrite(s,writedata,'uint16') %write data

readData=fscanf(s);

fclose(s);

delete(s);

Can you help me to this code? I've attached its simulink model here for more information.

Thanks!