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) {
    // dem bit
    uint8_t check = 0;
    for(int i=0; i<8; i++){
        if(((data >> i) & 1U) == 1){
            check++;
        }
    }
    // xu ly so lieu
    uint8_t p_bit;
    if(ctrl->parity_enable == 1){
        if(ctrl->parity_type == 0){
            if(check % 2 == 0){
                p_bit = 0;
            }else{
                p_bit = 1;
            }
        }else{
            if(check % 2 == 0){
                p_bit = 1;
            }else{
                p_bit = 0;
            }
        }
    }else{
        p_bit = 0;
    }
    return (data | (p_bit << 7));
}

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