serial_backend.h

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#ifndef ARES_SERIAL_BACKEND_H
#define ARES_SERIAL_BACKEND_H
 
#include <serial/serial.h>
#include <serial/serial_common.h>
#include <zephyr/sys/ring_buffer.h>

extern const struct ares_serial_transport_api ares_serial_uart_transport_api;

struct serial_uart_common {
    const struct device *dev;

    serial_transport_handler_t handler;

    void *context;

    bool block_tx;

    atomic_t block_no_usb;
};

struct serial_uart_int_driven {
    struct serial_uart_common common;

    struct ring_buf tx_ringbuf;

    struct ring_buf rx_ringbuf;

    uint8_t tx_buf[SERIAL_BACKEND_TX_RINGBUF_SIZE];

    uint8_t rx_buf[SERIAL_BACKEND_RX_RINGBUF_SIZE];

    struct k_timer dtr_timer;

    atomic_t tx_busy;
};

#define SERIAL_UART_STRUCT struct serial_uart_int_driven

#define SERIAL_UART_DEFINE(_name)                                              \
    static SERIAL_UART_STRUCT _name##_backend_uart;                            \
    static struct ares_serial_transport _name = {                              \
        .api = &ares_serial_uart_transport_api, .ctx = &_name##_backend_uart}

const struct ares_serial *ares_serial_backend_uart_get_ptr(void);
 
#endif // ARES_SERIAL_BACKEND_H