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 &= ~(1 << 7));
    }
    else{
        int count = 0; 
        for (int i = 0; i < 7; i++){ 
            if (data & (1 << i)) { 
                count ++; 
            }
        }
        if (ctrl->parity_type == 0){ 
            if ((count % 2) == 0){//even
                data &= ~(1 << 7); //clear the bit 
            }  
            else { 
                data |= (1<<7); 
            }
        }
        else{ 
            if ((count % 2) == 0){//even
                data |= (1<<7); 
            }  
            else { 
                data &= ~(1 << 7); //clear the bit 
            }
        }
    }

    return 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