MSP430F5529 fails to show output of SHARP IR sensor

[earthbound 0]

Hi,

 

I'm trying to read analog values from a SHARP IR sensor GP2Y0A41SK0F using the MSP430F5529 launchpad. There was not any error when I verified and uploaded the codes in Energia. However, when I clicked on the Serial Monitor, nothing showed up. But when I chose the MSP430G2452 from the "Tools" menu, the monitor successfully showed the analog values.

 

I connect Vcc (red wire) to 5 V pin, the ground (black wire) to GND pin, and the analog output (white wire) to P6.4 pin/A4 pin. 

 

The same thing also happened to the MSP430G2553 launchpad. It only works when MSP430G2452 is selected. 

 

I looked at the codes very thoroughly but I couldn't see any mistakes:

 

 

const int IR = A4;

 

void setup() 

{

    Serial.begin(9600);

}

 

void loop()

{

    int maxVal = 0, minVal = 1024, n=200;

    float x_i, total=0, mean;

    

    for (int i=1; i <= n; i++)

    {  

        x_i  = analogRead(IR);   

        total  += x_i;

        Serial.println(x_i);

        

        if (x_i < minVal)

       {

           minVal = x_i;

       }

       if (x_i > maxVal)

       {

           maxVal = x_i;

       }    

    }

    mean = total  / n;

    

    Serial.print("minimum = ");

    Serial.print(minVal);

    Serial.print(", maximum = "); 

    Serial.print(maxVal);

    Serial.print(", total = "); 

    Serial.print(total);

    Serial.print(", mean = ");

    Serial.println(mean);

   

    delay(100);

}

 

 

    

 

 

 

 

 

 

 

[spirilis 1,265]

I don't know anything about the sharp IR sensor, but be aware the MSP430 cannot tolerate 5V voltage levels.  It will damage the chip.