//
// Created by yelv1 on 24-12-30.
//

#ifndef USART_H
#define USART_H

#include "gd32e23x.h"
#include "board_config.h"

#define RX_BUFFER_SIZE            64

typedef struct
{
    unsigned char buffer[RX_BUFFER_SIZE];
    volatile unsigned int head;
    volatile unsigned int tail;
}ring_buffer_t;

static ring_buffer_t rx_buffer = {{0}, 0, 0}; // ring buffer for USART0

void usart_config(void);

void rs485_config(void);

void store_char(unsigned char data, ring_buffer_t *rx_buf);

uint16_t uart_available(void);

int uart_read(void);

#endif //USART_H