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 count1s(uint8_t data){
    uint8_t count = 0;
    uint8_t bit = 0;

    for(uint8_t i = 0; i<8; i++){
        bit = (data >> i) & 1;
        if(bit) {count++;}
    }
    return count;
}

uint8_t create_uart_frame(uint8_t data, UART_Control *ctrl) {
    // Your logic here
    uint8_t ones = 0;
    uint8_t parity = 0;
    if(!ctrl->parity_enable){return data;}
    else{
        if(ctrl->parity_type == 0){
            ones = count1s(data);
            parity = (ones % 2 == 0) ? 0 : 1;
            return ((parity << 7)| data);
        }

        if(ctrl->parity_type == 1){
            ones = count1s(data);
            parity = (ones % 2 == 0) ? 1 : 0;
            return ((parity << 7)| 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