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; // 0 = even, 1 = odd
    uint8_t reserved      : 6;
} UART_Control;

uint8_t create_uart_frame(uint8_t data, UART_Control *ctrl) {
    //add your loic
    if (ctrl->parity_enable == 0) {
        return data; 
    }

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

    uint8_t parity_bit;
    if (ctrl->parity_type == 0) {
        
        parity_bit = (count % 2 == 0) ? 0 : 1;
    } 
    else{
        parity_bit = (count % 2 == 0) ? 1 : 0;
    }

    
    if (parity_bit == 1) {
        data |= (1 << 7); 
    } else {
        data &= ~(1 << 7); 
    }

    return data;
}

int main() {
    uint8_t data;
    scanf("%hhu", &data);  // Entrée sur 7 bits (valeurs de 0 à 127)

    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\n", frame);

    return 0;
}

Solving Approach