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) {
     uint8_t frame = data & 0x7F;  
    if (ctrl->parity_enable) 
    {
        uint8_t temp = data & 0x7F;
        uint8_t parity = 0;

        while (temp) 
        {
            parity ^= (temp & 1);
            temp >>= 1;
        }

        if (ctrl->parity_type == 1) 
        {  
            parity = !parity;
        }

        frame |= (parity << 7);  
    }
    return frame;
}

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