Thread: don't know how to solve pointer to union of two different types??

I have the following simplified code and I need to have a formula take a uint16_t. This value however comes from multiple sources (ie multiple types) depending on who is calling the formula. The two issues I currently see in the debugger...
1. pTx assignment how do I do this ?
2. after I run the program the prtnVals don't look anything like the assignments??

Can someone please help.

Code:

/** * main.c
 */
#include <msp430.h>
#include <stdint.h>




#pragma LOCATION (pwmDiv, 0x1800);
#pragma PERSISTENT(pwmDiv);
volatile uint16_t pwmDiv = 50;


uint16_t itoa(uint16_t k);


union rtnVals
{
    volatile uint16_t Memory;
    float avg;
};


union rtnVals *prtnVals;
uint16_t test, lowByte = 2;
uint16_t *pTx = **prtnVals;


int main(void)
{
    WDTCTL = WDTPW | WDTHOLD;   // stop watchdog timer


    prtnVals->avg = 4454.0;
    prtnVals->Memory = pwmDiv;


    test = itoa((((*pTx)) >> (4 * lowByte)) & 0x0F);
}


uint16_t itoa(uint16_t k)
{
    if (k <= 9)
        return '0' + k;
    else
        return 'A' + (k - 10);
}

https://cboard.cprogramming.com/imag...AAAElFTkSuQmCC