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CCS/MSP430F6736: Addressing and assigning values

Keval Desai
Intellectual 590 points

Part Number: MSP430F6736

Tool/software: Code Composer Studio

Hi team,

I want to assign the values that an input port receives to a variable.

For example, I want to assign the value that port 1 pin 1 receives, to a variable a.

How do I achieve this?

Thanks,

Keval

  • 0
    TI__Expert 4695 points

    Hi Keval,

    Not sure if you talk about this:

    a = P1IN;

    This assigns the Port1 input register values to variable a.

    Best regards

    Lukas

  • 0
    TI__Expert 5490 points

    Hi Keval,

    in general you create a variable and you assign the value of a register or other variable with the "=" operator. Please see the code snippet below.

    unsigned int myVariable = 0;


myVariable = P1IN;        // store values of P1.0 to P1.7 into myVariable

myVariable = P1IN & 0x01; // only store value of P1.0 into myVariable

    Please also check the following application notes on general coding techniques and search the forum for such questions.

    Software Coding Techniques for MSP430 MCUs

    Best regards,

    Andre

  • 0 in reply to Andre Frantzke
    Intellectual 590 points

    Hi Andre,

    I am using the following code for test:

    #include <msp430.h>
    #include <stdio.h>

    /**
     * main.c
     */
    int main(void)
    {
     WDTCTL = WDTPW | WDTHOLD; // stop watchdog timer
     P4DIR |= BIT0 | BIT1;
     P1DIR &= ~BIT2;
     unsigned int data;
     

    while(1)
    {

        P4OUT &= ~BIT0;
        P4OUT &= ~BIT1;
        data = P1OUT & 0x04;            //reading the data coming at pin P1.2
        printf("ADC data=%d",data);

    }
    }

    I have set breakpoint at the printf command line.

    I want to read the data coming to P1.2 and print it on the screen.

    But when I run the code and set the breakpoint, it is not printing the value. I have set the printf support to full and the stack size to 320 too.

    Is there anything wrong with the code?

    what is the issue? Could you help me out?

    Thanks,

    Keval

  • 0 in reply to Keval Desai
    Guru 92251 points

    Keval Desai said:
    I have set the printf support to full and the stack size to 320 too.

    For printf to work also requires sufficient heap space - see Heap_Size on the Tips for using printf Wiki page.

  • 0 in reply to Andre Frantzke
    Intellectual 590 points
    Hi Andre,

    I have four digital signals that I have connected to port 5 pins 4,5,6,7.
    I want to increment the four signals (when combined) in such a manner that I get 0000,0001.0010,0011,....... 1111 as the sequence

    How do I achieve this?

    Thank you,
    Keval

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