/*
 * Copyright (c) 2006-2022, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2009-01-05     Bernard      first version
 * 2010-03-29     Bernard      remove interrupt tx and DMA rx mode.
 * 2010-03-30     Kyle         Ported from STM32 to AVR32.
 */

#ifndef __RT_HW_SERIAL_H__
#define __RT_HW_SERIAL_H__

#include <rthw.h>
#include <rtthread.h>
#include "compiler.h"
#include "usart.h"

#define UART_RX_BUFFER_SIZE     64
#define UART_TX_DMA_NODE_SIZE   4

/* data node for Tx Mode */
struct avr32_serial_data_node
{
    rt_uint8_t *data_ptr;
    rt_size_t  data_size;
    struct avr32_serial_data_node *next, *prev;
};

struct avr32_serial_int_rx
{
    rt_uint8_t  rx_buffer[UART_RX_BUFFER_SIZE];
    rt_uint32_t read_index, save_index;
};

struct avr32_serial_device
{
    avr32_usart_t *uart_device;

    /* rx structure */
    struct avr32_serial_int_rx* int_rx;
};

rt_err_t rt_hw_serial_register(rt_device_t device, const char* name, rt_uint32_t flag, struct avr32_serial_device *serial);

void rt_hw_serial_isr();

#endif
