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 parity_enable = ctrl->parity_enable;
    int parity_type = ctrl->parity_type;
    int count =0;
    int temp_data = data;
    if(parity_enable == 0) return data;
    while(temp_data){
        if(temp_data & 1 == 1){
            count ++;
        }
        temp_data >>= 1;
    }
    switch(parity_type){
        case 0:
            if(count%2 == 0){
                return data;
            }
            else{
                return uint8_t(data | 0x80);
            }
            break;
        case 1:
            if(count%2 == 0){

                return uint8_t(data | 0x80);
            }
            else{
                return data;
            }
            break;
    }
    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