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) {
    if(ctrl->parity_enable == 0)
        return data;
    else
    {
        int count = 0;
        uint8_t temp = data;
        for(int i = 0; i < 7; i++) {
            if(temp & 0x01)
                count++;
            temp = temp >> 1;
        }
        if((count%2) == 0)
            if(ctrl->parity_type == 0)
                return data;
            else   
                return data |= (0x80);
        else
            if(ctrl->parity_type == 0)
                return data |= (0x80);
            else   
                return data;
    }
    return 0;
}

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