Compiler/MSP430FR6989: Constant voltage reference on physical pin for NTC sensor

Hi Ling,

Thanks for responce.

Yes, I use P1.1 pin(MSP430FR6989) for Vref+ but schematic MSP430FR4331 use for reference only.

Now, on pin P1.1 I got a 1.19V through code part but I got an one issue here :

void Vref_ON()

{

 while(REFCTL0 & REFGENBUSY);                                     // If ref generator busy, WAIT

 REFCTL0 |= REFVSEL_0 + REFON + REFOUT;             // Enable internal 1.2V reference

 while(!(REFCTL0 & REFGENRDY));            // Wait for reference generator

                                                                                // to settle

}

void Vref_Off()

{

 REFCTL0=1;

}

void setup()

{

Vref_ON();

Serial.begin(9600);

}

void loop()

{

  // int val = analogRead(A11);    //*****  When I uncomment this portion then on P1.1 Vref+ not get (0.0V) otherwise got (1.19V) *****

 // float voltage = val * (1.2 / 1023);

 // Serial.println(voltage*1000);

 delay(500);

}

Please mention above comment and code.

Why this issue happen ?

Regards,

Pratik

Hello,

Anybody please reply me on my last post.

Thanks in advance.

Regards,

Pratik