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

/* ----------------------- Platform includes --------------------------------*/
#include "spi.h"
#include "stm32f10x.h"
#include "systaskinit.h"

/******************************************
 * func:    SPI3_ioconfig
 * desc:    config gpio;initialize hardware interface of spi3
 * input:   none
 * output:  none
 * return:  none
 *****************************************/

void Fram_Flash_SPI_Init(void)                       
{
  SPI_InitTypeDef  SPI_InitStructure;

	SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; 
	SPI_InitStructure.SPI_Mode = SPI_Mode_Master;		
	SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;		
	SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;		//CPOL low
	SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;	//CPOA first edge
	SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;		
	SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;		//Baud Rate Prescaler is 256
	SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;	//send and receive data begin with high bit 
	SPI_InitStructure.SPI_CRCPolynomial = 7;
	SPI_Init(Fram_Flash_SPI_NUM, &SPI_InitStructure);   
 
	SPI_Cmd(Fram_Flash_SPI_NUM, ENABLE); //Enable SPI3
		 
}  


/******************************************
 * func:    SPI_ReadWriteByte
 * desc:    spi receive and send data
 * input:   SPIx - SPI port , TxData - send data
 * output:  none
 * return:  the data received by spi
 *****************************************/
u8 SPI_ReadWriteByte(SPI_TypeDef* SPIx,u8 TxData)
{		
	u8 retry=0;				 	
	while (SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_TXE) == RESET) //¼ì²éÖ¸¶¨µÄSPI±ê־λÉèÖÃÓë·ñ:·¢ËÍ»º´æ¿Õ±ê־λ
		{
		retry++;
		if(retry>200)return 0;
		}			  
	SPI_I2S_SendData(SPIx, TxData); //ͨ¹ýÍâÉèSPIx·¢ËÍÒ»¸öÊý¾Ý
	retry=0;

	while (SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_RXNE) == RESET) //¼ì²éÖ¸¶¨µÄSPI±ê־λÉèÖÃÓë·ñ:½ÓÊÜ»º´æ·Ç¿Õ±ê־λ
		{
		retry++;
		if(retry>200)return 0;
		}	  						    
	return SPI_I2S_ReceiveData(SPIx); //·µ»Øͨ¹ýSPIx×î½ü½ÓÊÕµÄÊý¾Ý					    
}






u8 SPI1_ReadWriteByte(u8 TxData)
{		
	u8 retry=0;	
	while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET) //¼ì²éÖ¸¶¨µÄSPI±ê־λÉèÖÃÓë·ñ:·¢ËÍ»º´æ¿Õ±ê־λ
		{
		retry++;
		if(retry>200)return 0;
		}			  
	SPI_I2S_SendData(SPI1, TxData); //ͨ¹ýÍâÉèSPIx·¢ËÍÒ»¸öÊý¾Ý
	retry=0;
		
	while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET) //¼ì²éÖ¸¶¨µÄSPI±ê־λÉèÖÃÓë·ñ:½ÓÊÜ»º´æ·Ç¿Õ±ê־λ
		{
		retry++;
		if(retry>200)	return 0;
		}	  		
	
	return SPI_I2S_ReceiveData(SPI1); //·µ»Øͨ¹ýSPIx×î½ü½ÓÊÕµÄÊý¾Ý					    
}


u8 SPI3_ReadWriteByte(u8 TxData)
{		
	uint8 retry=0;				 	
	while (SPI_I2S_GetFlagStatus( SPI3, SPI_I2S_FLAG_TXE) == RESET) //send buffer  empty flag
		{
		retry++;
		if(retry>200)return 0;
		}			  
	SPI_I2S_SendData(SPI3, TxData); //send data
	retry=0;
		
	while (SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET) //receive buffer not empty flag
		{
		retry++;
		if(retry>200)return 0;
		}	  						    
	return SPI_I2S_ReceiveData(SPI3); //return received data 	
}


u8 SPI2_ReadWriteByte(u8 TxData)
{		
	uint8 retry=0;				 	
	while (SPI_I2S_GetFlagStatus( SPI2, SPI_I2S_FLAG_TXE) == RESET) //send buffer not empty flag
		{
		retry++;
		if(retry>200)return 0;
		}			  
	SPI_I2S_SendData(SPI2, TxData); //send data
	retry=0;
		
	while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET) //receive buffer not empty flag
		{
		retry++;
		if(retry>255)return 0;
		}	  						    
	return SPI_I2S_ReceiveData(SPI2); //return reveived data 	
}