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
    data=data&0x7F;
    if(ctrl->parity_enable==0) return data;
    int count=0;
    int temp=data;
    while(temp>0){
        if(temp&1) count++;
        temp>>=1;
    }
    int parity = 0;
    if(ctrl->parity_type==0){
        if(count%2==0) parity = 0;
        else parity = 1;
    }
    else{
        if(count%2==0) parity=1;
        else parity=0;
    }
    return parity<<7|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