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 count1s(uint8_t data){   //counting in 7 bit data
    uint8_t count=0;
    while (data){
        if (data & 1)
            count++;
        data=data>>1;
    }
    return count;
}

uint8_t create_uart_frame(uint8_t data, UART_Control *ctrl) {
    // Your logic here
    uint8_t frame=0;
    frame|=data;
    if (ctrl->parity_enable){
        if (!ctrl->parity_type){        //0 if parity is even
            if(count1s(data) % 2)
                frame|=0x80;
        }

        else {          //1 if parity is odd
            if(! (count1s(data)%2))
                frame|=0x80;
        }
    }
    return frame;
}

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