//***********************************************************************************
//  Ver 1.0
//      2020.03.05   1、新建文件。
//***********************************************************************************
#ifndef	__RS485__H
#define	__RS485__H

//***********************************************************************************
//RS485 GPIO初始化
#define	RS485_GpioInit()	do{								                                           \
	GPIO_Init(GPIOA, GPIO_Pin_0, 1, GPIO_Mode_OUT, GPIO_Speed_50MHz, GPIO_OType_PP, GPIO_PuPd_NOPULL); \
	GPIO_Init(GPIOA, GPIO_Pin_1, 1, GPIO_Mode_OUT, GPIO_Speed_50MHz, GPIO_OType_PP, GPIO_PuPd_NOPULL); \
}while(0)
//RS485_RE输出控制
#define	RS485_ReLow()	GPIO_ResetBits(GPIOA, GPIO_Pin_0)
#define	RS485_ReHigh()	GPIO_SetBits(GPIOA, GPIO_Pin_0)

//RS485_DE输出控制
#define	RS485_DeHigh()	GPIO_SetBits(GPIOA, GPIO_Pin_1)
#define	RS485_DeLow()	GPIO_ResetBits(GPIOA, GPIO_Pin_1)

//***********************************************************************************
enum{
    RS485_MODE_RX   = 0,
    RS485_MODE_PD   = 2,
    RS485_MODE_TX   = 3,
};
#define RS485_Mode(Mode) do{ 		\
    if(Mode & 0x01) RS485_ReHigh(); \
    else            RS485_ReLow();  \
	if(Mode & 0x02) RS485_DeHigh(); \
    else            RS485_DeLow();  \
}while(0)

#define RS485_SendChar(ch)   UART_SendChar(USART1, ch)

//***********************************************************************************
#define RS485_Init()    do{ \
    RS485_GpioInit();       \
    UART_Init(USART1, UART_115200bps,  USART_WordLength_8b, USART_StopBits_1, USART_Parity_No, 1);  \
}while(0)

#endif