Construct UART Data Frame with Parity Bit

Code

#include <stdio.h>
#include <stdint.h>

typedef struct {
    uint8_t parity_enable : 1;
    uint8_t parity_type   : 1;
    uint8_t reserved      : 6;
} UART_Control;

uint8_t create_uart_frame(uint8_t data, UART_Control *ctrl) {
    // Your logic here
    if(ctrl->parity_enable){
        int one_count=0;
        uint8_t n= data&0x7F;
        while(n!=0) {
            n=n&(n-1);
            one_count++;
        }
        if(ctrl->parity_type) {
            // odd parity
            if(one_count%2) 
                return (0x7F & data);  
            else
                return (0x80 | data);
        }
        else {
            // even parity
            if(one_count%2)
                return (0x80 | data);
            else 
                return (0x7f & data); 
        }
    }
    else {
        return (data & 0x7F);
    }
}

int main() {
    uint8_t data;
    scanf("%hhu", &data);  // 7-bit input

    uint8_t parity_enable, parity_type;
    scanf("%hhu %hhu", &parity_enable, &parity_type);

    UART_Control ctrl;
    ctrl.parity_enable = parity_enable;
    ctrl.parity_type = parity_type;

    uint8_t frame = create_uart_frame(data, &ctrl);
    printf("frame = 0x%02X", frame);

    return 0;
}

Solving Approach