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 ones(size_t n){
  
  uint8_t count=0;
  while(n){
    n&=(n-1);
    count++;
  }
  return count;
}
uint8_t create_uart_frame(uint8_t data, UART_Control *ctrl) {
    // Your logic here
   // struct UART_Control *data;
   if (ctrl == NULL) {
        printf("Error: UART_Control pointer is NULL.\\n");
        return 1; // Return an error code
    }
    data &= 0x7F;  
    uint16_t frame=data;
  

    //check partiy
    if(ctrl->parity_enable){
      uint8_t count=ones(data);
      uint8_t even=(count);
      uint8_t parity_check=even^ctrl->parity_type;
      frame|=(parity_check<<7);
    }
   
   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;
}

Solving Approach