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(uint8_t data)
{
    uint8_t count = 0;
    while(data)
    {
        count += (data & 0x01);
        data >>= 1;
    }
    return count;
}

uint8_t create_uart_frame(uint8_t data, UART_Control *ctrl) {
    // Your logic here
    data &= 0x7F;
    uint8_t bit;
    if(ctrl->parity_enable == 0)
    {
        return data;
    }
    uint8_t noOfbits = count(data);
    if(ctrl->parity_type)
    {
        bit = (noOfbits%2==0) ? 1:0;
    }
    else
    {
        bit = (noOfbits%2==0) ? 0:1;
    }
    data |= (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;
}