#ifndef _AVR_UART_H_
#define _AVR_UART_H_

/*
#define RXB8 1
#define TXB8 0
#define PE 2    //M16
//#define UPE 2    //M128
#define OVR 3
#define FE 4
#define UDRE 5
#define RXC 7*/

//宏定义
#define FRAMING_ERROR (1<<FE)
#define PARITY_ERROR (1<<PE)    //M16
//#define PARITY_ERROR (1<<UPE)    //M128
#define DATA_OVERRUN (1<<DOR)
#define DATA_REGISTER_EMPTY (1<<UDRE)
#define RX_COMPLETE (1<<RXC)

#define BAUD 9600

// USART Receiver buffer
// 全局变量,会在中断服务程序中被修改，须加volatile限定，不要就会出错啦
#define RX_BUFFER_SIZE 1         // 接收缓冲区大小，可根据需要修改
volatile unsigned char rx_buffer[RX_BUFFER_SIZE]; // 接收缓冲区，为char型变量组成的数组，该数组构成环形队列，个数为RX_BUFFER_SIZE
volatile unsigned char rx_wr_index,rx_rd_index,rx_counter;
// This flag is set on USART Receiver buffer overflow
//volatile char rx_buffer_overflow;   //接收缓冲区溢出标志

// USART Transmitter buffer
#define TX_BUFFER_SIZE 100
volatile char tx_buffer[TX_BUFFER_SIZE];
volatile unsigned char tx_wr_index,tx_rd_index,tx_counter;

volatile unsigned char comm_flag;

volatile unsigned char Uart_RecvFlag;

void uart_putchar(char c);
char uart_getchar(void);
void uart_printf(char *fmt, ...);
void uart_init(void);
void uart_putint(int c);
#endif