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) {
    data &= 0x7F;

    uint8_t parity_count = 0;

    if(ctrl->parity_enable) {
        for(int i = 0; i < 8; i++){
            parity_count += (data >> i) & 1;
        }  

        uint8_t parity_bit;
        if(ctrl->parity_type == 0)
        {
            parity_bit = (parity_count % 2 == 0) ? 0 : 1;
        } else {
            parity_bit = (parity_count % 2 == 0) ? 1 : 0;
        }

        data |= (parity_bit << 7);
    }
    
    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