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 count = 0;
        uint8_t temp = frame; 
        while(temp) {
            if(temp &1) {
                count++;
            }
            temp>>=1;
        }
        uint8_t parity_bit = 0;
        if(ctrl->parity_type == 0) {
            parity_bit = (count %2) ? 1:0;
        } else{
            parity_bit = (count %2) ? 0:1;
        }
        frame |= parity_bit << 7;

    } else {
        frame &= 0x7F;
    }
    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