#include "sys.h"
#include "usart.h"	
////////////////////////////////////////////////////////////////////////////////// 	 
//ʹucos,ͷļ.
#if SYSTEM_SUPPORT_OS
#include "includes.h"					//ucos ʹ	  
#endif
//////////////////////////////////////////////////////////////////////////////////	 
//ֻѧϰʹãδɣκ;
//ALIENTEK STM32F4̽߿
//1ʼ		   
//ԭ@ALIENTEK
//̳:www.openedv.com
//޸:2014/6/10
//汾V1.5
//ȨУؾ
//Copyright(C) ӿƼ޹˾ 2009-2019
//All rights reserved
//********************************************************************************
//V1.3޸˵ 
//֧ӦͬƵµĴڲ.
//˶printf֧
//˴ڽ.
//printfһַʧbug
//V1.4޸˵
//1,޸ĴڳʼIObug
//2,޸USART_RX_STA,ʹôֽΪ214η
//3,USART_REC_LEN,ڶ崮յֽ(214η)
//4,޸EN_USART1_RXʹܷʽ
//V1.5޸˵
//1,˶UCOSII֧
////////////////////////////////////////////////////////////////////////////////// 	  
 

//////////////////////////////////////////////////////////////////
//´,֧printf,Ҫѡuse MicroLIB	  
#if 1
#pragma import(__use_no_semihosting)             
//׼Ҫֺ֧                 
struct __FILE 
{ 
	int handle; 
}; 

FILE __stdout;       
//_sys_exit()Աʹðģʽ    
void _sys_exit(int x) 
{ 
	x = x; 
} 
//ضfputc 
int fputc(int ch, FILE *f)
{ 	
	while((USART1->SR&0X40)==0);//ѭ,ֱ   
	USART1->DR = (u8) ch;      
	return ch;
}
#endif
 
#if EN_USART1_RX   //ʹ˽
//1жϷ
//ע,ȡUSARTx->SRܱĪĴ   	
u8 USART_RX_BUF[USART_REC_LEN];     //ջ,USART_REC_LENֽ.
//״̬
//bit15	ɱ־
//bit14	յ0x0d
//bit13~0	յЧֽĿ
u16 USART_RX_STA=0;       //״̬	

//ʼIO 1 
//bound:
void uart_init(u32 bound){
   //GPIO˿
  GPIO_InitTypeDef GPIO_InitStructure;
	USART_InitTypeDef USART_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;
	
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE); //ʹGPIOAʱ
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);//ʹUSART1ʱ
 
	//1ӦŸӳ
	GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_USART1); //GPIOA9ΪUSART1
	GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_USART1); //GPIOA10ΪUSART1
	
	//USART1˿
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10; //GPIOA9GPIOA10
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//ù
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;	//ٶ50MHz
	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //츴
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //
	GPIO_Init(GPIOA,&GPIO_InitStructure); //ʼPA9PA10

   //USART1 ʼ
	USART_InitStructure.USART_BaudRate = bound;//
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;//ֳΪ8λݸʽ
	USART_InitStructure.USART_StopBits = USART_StopBits_1;//һֹͣλ
	USART_InitStructure.USART_Parity = USART_Parity_No;//żУλ
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//Ӳ
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;	//շģʽ
  USART_Init(USART1, &USART_InitStructure); //ʼ1
	
  USART_Cmd(USART1, ENABLE);  //ʹܴ1 
	
	//USART_ClearFlag(USART1, USART_FLAG_TC);
	
#if EN_USART1_RX	
	USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//ж

	//Usart1 NVIC 
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;//1жͨ
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//ռȼ3
	NVIC_InitStructure.NVIC_IRQChannelSubPriority =3;		//ȼ3
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;			//IRQͨʹ
	NVIC_Init(&NVIC_InitStructure);	//ָĲʼVICĴ

#endif
	
}


void USART1_IRQHandler(void)                	//1жϷ
{
	u8 Res;
#if SYSTEM_SUPPORT_OS 		//SYSTEM_SUPPORT_OSΪ棬Ҫ֧OS.
	OSIntEnter();    
#endif
	if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)  //ж(յݱ0x0d 0x0aβ)
	{
		Res =USART_ReceiveData(USART1);//(USART1->DR);	//ȡյ
		
		if((USART_RX_STA&0x8000)==0)//δ
		{
			if(USART_RX_STA&0x4000)//յ0x0d
			{
				if(Res!=0x0a)USART_RX_STA=0;//մ,¿ʼ
				else USART_RX_STA|=0x8000;	// 
			}
			else //ûյ0X0D
			{	
				if(Res==0x0d)USART_RX_STA|=0x4000;
				else
				{
					USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ;
					USART_RX_STA++;
					if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//ݴ,¿ʼ	  
				}		 
			}
		}   		 
  } 
#if SYSTEM_SUPPORT_OS 	//SYSTEM_SUPPORT_OSΪ棬Ҫ֧OS.
	OSIntExit();  											 
#endif
} 
#endif	

 



