ws_at45dbxx.h

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/********************************************************************************************************
*
* File                : ws_AT24CXX.h
* Hardware Environment: 
* Build Environment   : ST Visual Develop 4.1.6
* Version             : V1.0
* By                  : Xiao xian hui
*
*                                  (c) Copyright 2005-2010, WaveShare
*                                       http://www.waveShare.net
*                                          All Rights Reserved
*
*********************************************************************************************************/

#ifndef _WS_AT45DBXX_H_
#define _WS_AT45DBXX_H_

#include <ws_spi.h>

#define CS_CLK PE_ODR&=(~0x20);
#define CS_SET PE_ODR|=0x20;

void AT45DBXX_Init(void)
{/*
	SPI_CR1|=0x38;   //波特率
	SPI_CR1|=0x03;   //时钟格式
	SPI_CR1&=0x7f;   //帧格式
	
	SPI_CR2|=0x03;   //配置NSS脚为1
	SPI_CR1|=0x04;   //配置为主设备
	SPI_CR1|=0x40;   //开启SPI
	*/
	SPI_Init();
	PE_DDR|=0x20;
	PE_CR1|=0x20;
	CS_SET;
}
/*
void AT45DBXX_sendchar(u8 data)
{
	while((SPI_SR & 0x02)==0);
	SPI_DR=data;
	while((SPI_SR & 0x80)==1);
}

u8 AT45DBXX_rechar(void)
{	
	u8 data;
	data=SPI_DR;
	while((SPI_SR & 0x80)==1);
	return data;
}*/

void write_buffer(u16 BufferOffset,u8 Data)
{			
	CS_CLK;
	delay_us(10);
	SPI_sendchar(0x84);			
	SPI_sendchar(0xff);
	SPI_sendchar((u8)BufferOffset>>8);
	SPI_sendchar((u8)BufferOffset);		
	SPI_sendchar(Data);
	delay_us(10);
	CS_SET;
}

u8 read_buffer(u16 BufferOffset)
{		
	u8 temp;
	CS_CLK;
	delay_us(10);
 	SPI_sendchar(0xd4);
	SPI_sendchar(0xff);
	SPI_sendchar((u8)BufferOffset>>8);
	SPI_sendchar((u8)BufferOffset);
	SPI_sendchar(0xff);
	SPI_sendchar(0xff);
	temp=SPI_rechar();
	delay_us(10);
	CS_SET;
	return temp;		
}

#endif /*_WS_AT45DBXX_H_*/