/******************************************************************************
 * Copyright (C) 2014-2015 HangZhou SiZhu Co.,LTD.
 *
 *-----------------------------------------------------------------------------
 * File: 			    RS232.c
 * Description:		RS232 gpio config ,receive and send data code
 * Author:			  Lishoujian (867693272@qq.com)
 * Date:			    Jan 8, 2015
 *****************************************************************************/

/* ----------------------- Platform includes --------------------------------*/
#include "RS232.h"
#include "stm32f10x.h"
#include "delay.h"

//#define	DMA_RS232_TX		
#define	DMA_RS232_RX

RX_RS232_T		rx_data_s_g;	

//u8	tx232_buf[TX_NUM]= {0};
void GPRS_RS232_Usart_Init(uint32  system_BaudRate)
{
	USART_InitTypeDef		USART_InitStructure ;
	DMA_InitTypeDef 		DMA_InitStructure;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
	RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);	

	USART_InitStructure.USART_BaudRate = system_BaudRate;
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;
	USART_InitStructure.USART_StopBits = USART_StopBits_1;
	USART_InitStructure.USART_Parity = USART_Parity_No ;
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

	USART_Init(UARTRS232NUM , &USART_InitStructure );
	USART_Cmd(UARTRS232NUM, ENABLE);   
	
	/*DMA½ÓÊÕ·¢Ëͳõʼ»¯*/
	DMA_DeInit(DMA_RS232_RX_Channel); 
	/*ÉèÖÃDMAÔ´£º´®¿ÚÊý¾Ý¼Ä´æÆ÷µØÖ·*/
	DMA_InitStructure.DMA_PeripheralBaseAddr =(u32)(&(UARTRS232NUM->DR)) ;	   
	/*ÄÚ´æµØÖ·(Òª´«ÊäµÄ±äÁ¿µÄÖ¸Õë)*/
	DMA_InitStructure.DMA_MemoryBaseAddr = (u32)(rx_data_s_g.RS232_RX_TEMP_BUF);
	/*·½Ïò£º´ÓË«Ïòµ½ÄÚ´æ*/		
	DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;	
	/*´«Êä´óСDMA_BufferSize=SENDBUFF_SIZE*/	
	DMA_InitStructure.DMA_BufferSize = RX232_LENGTH;
	/*ÍâÉèµØÖ·²»Ôö*/	    
	DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; 
	/*ÄÚ´æµØÖ·×ÔÔö*/
	DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;	
	/*ÍâÉèÊý¾Ýµ¥Î»*/	
	DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
	/*ÄÚ´æÊý¾Ýµ¥Î» 8bit*/
	DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;	 
	/*DMAģʽ£º²»¶ÏÑ­»·*/
	//DMA_InitStructure.DMA_Mode = DMA_Mode_Normal ;
	DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;	 
	/*ÓÅÏȼ¶£ºÖÐ*/	
	DMA_InitStructure.DMA_Priority = DMA_Priority_High;  
	/*½ûÖ¹ÄÚ´æµ½ÄÚ´æµÄ´«Êä	*/
	DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

		   
	DMA_Init(DMA_RS232_RX_Channel, &DMA_InitStructure); 
	USART_DMACmd(UARTRS232NUM, USART_DMAReq_Rx, ENABLE); 
	DMA_Cmd(DMA_RS232_RX_Channel, ENABLE);

 //	USART_ClearITPendingBit(UARTRS232NUM, USART_IT_TC);//Çå³ýTC±êÖ¾

}


/******************************************
 * func:    gprsuart_sendbyte
 * desc:    send data by RS232
 * input:   USARTx - select USART PORT , buf - receive buffer , len - data length
 * output:  none
 * return:  none
 *****************************************/

void gprsuart_sendbyte(unsigned char dat)
{
	while(USART_GetFlagStatus(UARTRS232NUM,USART_FLAG_TC) == RESET);
	USART_ClearFlag(UARTRS232NUM,USART_FLAG_TC);
	USART_SendData(UARTRS232NUM,dat);
}