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 count_ones(uint8_t data)
{
    uint8_t count;
    for(int i=0; i<7; i++)
    {
        //if(data&(1<<i))
        if((data>>1) & 1)
            count++;
    }
    return count;
}

uint8_t create_uart_frame(uint8_t data, UART_Control *ctrl) {
    // Your logic here
    uint8_t count;
    count = count_ones(data);
    if(ctrl->parity_enable == 1)
    {
        if(ctrl->parity_type == 0)
        {
            if(count%2 == 0)
                data &= ~(1<<7);
            else
                data |= (1<<7);
        }
        else
        {
            if(count%2 == 0)
                data |= (1<<7);
            else
                data &= ~(1<<7); 
        }
    }
    else
    {
        
    }
    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;
}