#include "UART_ARM.h"
#include "TIM6_1MS.h"
#include "app_def.h"

#define UART_BUFSIZE    1024
unsigned int UART_Rev_WriteInex=0;
unsigned int UART_Rev_ReadIndex=0;
unsigned char UART_Rev_Buf[1024];

unsigned int UART_Send_WriteIndex=0;
unsigned int UART_Send_ReadIndex=0;
unsigned char UART_Send_Buf[1024];
static unsigned char UART_SendingFlag=0;       //UART发送中标识，0表示非发送中
U16 UartBusTime =0;    //收到长的BUS数据，延时发UART指令

extern void UART_Rev_NewInfo(unsigned char *pInfo);
int UART_ARM_init(void)
{
    GPIO_InitTypeDef GPIO_InitStruct;	
	NVIC_InitTypeDef NVIC_InitStruct;
    USART_InitTypeDef USART_InitStructure;
    
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
 	//===================================
	//打开引脚时钟
    UART_ARM_Tx_RccOpen();
    UART_ARM_Rx_RccOpen();
	//===================================   
    //Tx,Rx设置为复用引脚，注意：输入要设置浮空输入
	GPIO_InitStruct.GPIO_Mode		= GPIO_Mode_AF_PP;
	GPIO_InitStruct.GPIO_Speed		= GPIO_Speed_50MHz;
    GPIO_InitStruct.GPIO_Pin		= UART_ARM_Tx_Line;
    GPIO_Init(UART_ARM_Tx_Port,&GPIO_InitStruct);
	//==
    GPIO_InitStruct.GPIO_Mode		= GPIO_Mode_IN_FLOATING;
	GPIO_InitStruct.GPIO_Pin		= UART_ARM_Rx_Line;
    GPIO_Init(UART_ARM_Rx_Port,&GPIO_InitStruct);   
    //===================================
    //引脚重映射
    UART_ARM_Remap();
    //===================================
    UART_ARM_RccOpen();											                                //打开串口时钟
	USART_DeInit(UART_ARM_Periph);								                                //初始化为默认值
	USART_InitStructure.USART_BaudRate						= 115200;			                //波特率
	USART_InitStructure.USART_WordLength					= USART_WordLength_8b;	            //8位数据
	USART_InitStructure.USART_StopBits						= USART_StopBits_1;					//1位停止位
	USART_InitStructure.USART_Parity						= USART_Parity_No;					//无校验
	USART_InitStructure.USART_Mode							= USART_Mode_Rx | USART_Mode_Tx;	//双工
	USART_InitStructure.USART_HardwareFlowControl	        = USART_HardwareFlowControl_None;	//无协议控制
	USART_Init(UART_ARM_Periph,&USART_InitStructure);											//初始化
	USART_Cmd(UART_ARM_Periph,ENABLE);		
    //===================================
	//打开串口中断
	USART_ClearITPendingBit(UART_ARM_Periph,USART_IT_RXNE);								        //先清掉中断标志位
        USART_ClearITPendingBit(UART_ARM_Periph,USART_IT_TXE);								        //先清掉中断标志位
	USART_ITConfig(UART_ARM_Periph,USART_IT_RXNE,ENABLE);								        //打开串口接收中断      
    //===================================    
	//对中断进行初始化
	NVIC_InitStruct.NVIC_IRQChannel							= UART_ARM_IRQ;			            //中断号
	NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority	    = UART_ARM_PPriority;               //抢占级
	NVIC_InitStruct.NVIC_IRQChannelSubPriority				= UART_ARM_SPriority;               //响应级
	NVIC_InitStruct.NVIC_IRQChannelCmd						= ENABLE;					        //打开该中断
	NVIC_Init(&NVIC_InitStruct);
	//缓冲区初始化
    //=================================== 
    UART_Rev_WriteInex=0;
    UART_Rev_ReadIndex=0;
    UART_Send_WriteIndex=0;
    UART_Send_ReadIndex=0;
    UART_SendingFlag=0;
    return 1;
}


unsigned int u16cnttest =0;
void UART_Tick(void)
{
    unsigned int i;
    static unsigned char UART_Rev_Data[100]={0};
    static unsigned int  UART_Rev_DataIndex=0;



    //============================================================================
    //查询是否有发送任务
		
	
    if(UART_SendingFlag==0)
    {
//	if ( UartBusTime < 300) {  //避免上行下行干扰
//	    	return;
//	}
        if(UART_Send_WriteIndex!=UART_Send_ReadIndex)
        {
           UART_SendingFlag=0xFF;
           i=UART_Send_ReadIndex;
           UART_Send_ReadIndex++;
           if(UART_Send_ReadIndex>=UART_BUFSIZE)  UART_Send_ReadIndex=0; 
           USART_SendData(UART_ARM_Periph, UART_Send_Buf[i]); 
           USART_ITConfig(UART_ARM_Periph,USART_IT_TXE,ENABLE);								        //打开串口发送中断   
        }   
    }
 // if ( Bus_SendStart ) {
//		return;
  //	}
    //============================================================================
    if(UART_Rev_WriteInex!=UART_Rev_ReadIndex)
    {
        while(UART_Rev_WriteInex!=UART_Rev_ReadIndex)
        {
            //====================================================== 
            if(UART_Rev_Buf[UART_Rev_ReadIndex]=='$')
            {
               UART_Rev_DataIndex=0;
               UART_Rev_Data[0]='$';     
            }
            else if(UART_Rev_Buf[UART_Rev_ReadIndex]=='#')
            {
                UART_Rev_Data[UART_Rev_DataIndex]='#'; 
                UART_Rev_NewInfo(UART_Rev_Data);
                UART_Rev_DataIndex=0;
            }
            else
            {
                UART_Rev_Data[UART_Rev_DataIndex]=UART_Rev_Buf[UART_Rev_ReadIndex];  
            }
           UART_Rev_DataIndex++;
           if(UART_Rev_DataIndex>=100)  UART_Rev_DataIndex=0; 
           //====================================================== 
           UART_Rev_ReadIndex++;
          if(UART_Rev_ReadIndex>=UART_BUFSIZE)  UART_Rev_ReadIndex=0;  
        }
    }
}

void UART_Send(unsigned char *pdata,unsigned short len)
{
    while(len>0)
    {
         UART_Send_Buf[UART_Send_WriteIndex]=*pdata;
         UART_Send_WriteIndex++;
         if(UART_Send_WriteIndex>=UART_BUFSIZE)  
             UART_Send_WriteIndex=0;
         pdata++;
         len--;
    }
}



void UART_ARM_IRQ_Handler()
{
    unsigned int i;
    //处理接收中断
    //============================================
    if(USART_GetITStatus(UART_ARM_Periph, USART_IT_RXNE) != RESET)
    {
        UART_Rev_Buf[UART_Rev_WriteInex]=USART_ReceiveData(UART_ARM_Periph);
        UART_Rev_WriteInex++;
        if(UART_Rev_WriteInex>=UART_BUFSIZE)  UART_Rev_WriteInex=0;
    }
    //============================================
    //处理发送中断
    if(USART_GetITStatus(UART_ARM_Periph, USART_IT_TXE) != RESET)
   {
        if(UART_Send_ReadIndex!=UART_Send_WriteIndex)
        {
            i=UART_Send_ReadIndex;
            UART_Send_ReadIndex++;
            if(UART_Send_ReadIndex>=UART_BUFSIZE)  UART_Send_ReadIndex=0;             
            USART_SendData(UART_ARM_Periph, UART_Send_Buf[i]); 
        }
        else
        {
            UART_SendingFlag=0;
            USART_ITConfig(UART_ARM_Periph,USART_IT_TXE,DISABLE);								        //关闭串口发送中断   
        }
   }
}