#ifndef _USART_H
#define _USART_H

#include "stm32f4xx.h"
/*
 *1：定义STM32F103Cxxx三个串口
 *0：定义STM32F103xxxx五个串口
 *无定义默认使用三个串口
 */
#define USE_STM32F103_Cxxx      0

#define TURE    1
#define FALSE   0


/* DMA */
#define USART_DR_BASE                   (USART1_BASE+0x04)
 
#define USART_TX_DMA_CLK	        RCC_AHB1Periph_DMA2
#define USART_TX_DMA_CHANNEL	        DMA_Channel_4
#define	USART_TX_DMA_STREAM	        DMA2_Stream7
 
#define USART_RX_DMA_CLK	        RCC_AHB1Periph_DMA2
#define USART_RX_DMA_CHANNEL	        DMA_Channel_4
#define	USART_RX_DMA_STREAM	        DMA2_Stream5		 


/* 串口外设 */
typedef struct USART {
    char *name;
    int (*usart_init)(struct USART *pDev, uint32_t BaudRate, uint16_t DataBit, float StopBit, uint16_t Parity);
    void (*usart_deinit)(struct USART *pDev);
    void (*usart_send)(struct USART *pDev, uint8_t *data, uint16_t dataLenght);
    int (*usart_print)(struct USART *pDev, uint32_t timeout_ms, char *format, ...);
    int (*usart_receive)(struct USART *pDev, uint8_t *data, uint16_t data_len, uint16_t *rec_br, uint32_t timeout_ms);
    uint32_t(*usart_wait_message_count)(struct USART *pDev);
    void *usart_priv_data;
} usart_obj_t;

/* 获取串口外设句柄 */
usart_obj_t *get_usart_obj(char *name);

#endif