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) {
    int i,c=0,a;
    uint8_t temp;
    data=data&0x7f;
    temp=data;
    if(ctrl->parity_enable==0){
    return data;}
    else{
        for(i=0;i<7;i++){
                if((temp>>i)&1)c++;
            }
        if(ctrl->parity_type==0){
            a=(c%2==0)?0:1;
           data=(a<<7)|data;
           return data;
        }
        else{
            a=(c%2==0)?1:0;
            data=(a<<7)|data;
            return data;
        }
    }
}


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