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){
        uint8_t count = 0;
        for(int i=0;i<7;i++){
            if(data & 1<<i) count++;
        }
        if((ctrl->parity_type == 0 && count%2 == 0)||
           (ctrl->parity_type == 1 && count%2 == 1)) return data & 0x7F;
        else return data | 0x80; 
    }
    else return data & 0x7F;
}

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