76. Construct UART Data Frame with Parity Bit

#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) {
    // Your logic here
    
    data = data & 0x7F;

    if(ctrl->parity_enable == 0){
        return data;
    }
    
    uint8_t temp = data;
    int count = 0;

    while (temp > 0){
        if(temp & 1){
            count++;
        }

        temp = (temp >> 1);
    }

    /*if((count % 2) == 0){
        return data | ((ctrl->parity_type)<<7);
    }
    else{
        return data | ((1-(ctrl->parity_type))<<7);
    }*/
    
    return data | (((ctrl->parity_type)^(count%2))<<7);
}

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;
}