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;

// 0101 0101 

uint8_t create_uart_frame(uint8_t data, UART_Control *ctrl) {
    // Your logic here
    if(ctrl->parity_enable){
        int bit_count = 0;
        uint8_t data_t = data;

        while(data_t){
            bit_count += data_t & 0x1U;
            data_t >>= 1;
        }
        
        uint8_t parity_bit = 0;

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