/*  serial.h
*   Serial Interface
*
*   Send/receive data via serial ports.
*/
#ifndef SERIAL_H
#define SERIAL_H
#include "asm.h"
#include "io.h"
#include <stdint.h>

typedef struct SerialState_s {
    uint16_t port;
} SerialState_t;

extern char_writer_t* default_COM;

/**
 * @brief Initialize a serial port for communication
 * @param port The serial port number to initialize
 * @return Status code indicating success or failure
 */
int serial_init(uint16_t port);

/**
 * @brief Check if there is pending data to receive on the serial port
 * @return Non-zero if data is pending, 0 otherwise
 */
int serial_recv_pending();

/**
 * @brief Receive a single byte from the serial port
 * @return The received byte as an 8-bit unsigned integer
 */
uint8_t serial_recv8(uint16_t port);

/**
 * @brief Check if the serial port is ready to send data
 * @return Non-zero if ready to send, 0 otherwise
 */
int serial_send_pending(uint16_t port);

/**
 * @brief Send a single byte through the serial port
 * @param data The 8-bit data byte to send
 */
int serial_send8(uint16_t port, char data);


#endif