76. Construct UART Data Frame with Parity Bit

#include <stdio.h>
#include <stdint.h>
#include <math.h>
typedef struct {
    uint8_t parity_enable : 1;
    uint8_t parity_type   : 1;
    uint8_t reserved      : 6;
} UART_Control;

int count_ones(int num) {
    int count = 0;
    while (num) {
        count += num & 1;  // Add 1 if the least significant bit is 1
        num >>= 1;         // Right shift to check the next bit
    }
    return count;
}   

uint8_t create_uart_frame(uint8_t data, UART_Control *ctrl) {
    // Your logic here
    uint32_t frame;
    if(ctrl->parity_enable==1){
        if(ctrl->parity_type==0){
            if(count_ones(data)%2==0){
                frame = 0;
            }
            else{
                frame = 1;
            }
        }

        else{

            if(count_ones(data)%2==0){
                frame = 1;
            }
            else{
                frame = 0;
            }
        }
    }


    else {

        frame = 0;
    }

    frame = frame <<7;
    frame = frame | data;
    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;
}