Thread: Basic question how to pass a char string to a function?

I have two files main.c and lprs_mspConfig.c
I want to pass a string argument from main to a function can someone tell me how to do this.

Main.c

Code:

int main(void){


    WDTCTL = WDTPW | WDTHOLD;    // stop watchdog timer
    
    config_timer('B0', 2344);


    LPM3;
    return 0;
}

lprs_mspConfig.c

Code:

void config_timer(char name[3], uint v){
    char *pName;
    pName = name;


    if (*pName == 'B0') {
        TB0CCR0 = v;
        TB0CTL = TBSSEL__ACLK;
        TB0CCTL0 &= ~CCIFG;


    }
    else if (*pName == 'B1') {
        TB1CCR0 = v;
        TB1CTL = TBSSEL__ACLK;
        TB1CCTL0 &= ~CCIFG;
    }
    else if (*pName == 'B2') {
        TB2CCR0 = v;
        TB2CTL = TBSSEL__ACLK;
        TB2CCTL0 &= ~CCIFG;
    }
}

I tried double quotes....I can see name = "B0" coming into function....
but name == "B0" conditional never seems to get met

Thank you....
That worked....I didn't realize strcmp returns a 0 when true....

Originally Posted by ridgerunnersjw

That worked....I didn't realize strcmp returns a 0 when true....

strcmp doesn't return a "true" or "false" value. It returns a value less than 0, 0, or a value greater than 0, depending on the relative order of the string arguments.

You can think of it as returning the "difference" between the strings (like a - b), where a value less than 0 tells you that string a is "less than" string b.