at45.c

脱机ISP编程器

/****************************************************************
*          ATMEL的DATAFLASH操作函数库（FOR AT45DB161D）         *
*                                                               *
*                     作者：gxlujd（彩虹）                      *
*             最后修改时间：2007年2月18日（大年初一）           *
*                                                               *
*    感谢www.ouravr.com、阿莫和坛子里的哥们一直以来的热心帮助   *
*                                                               *
*    如果这些资源能帮到你，请保留以上这些信息，同时也请你把自   *
*    己的一些日常积累拿出来分享，这个世界需要更多的无私开源，   *
*    别让金钱和利益蒙住了内心的真诚，谢谢！                     *
*****************************************************************/
/*modify:avenbbs([e-mail])*/


#include <avr/io.h>
#include <util/delay.h>
#include "AT45.h"
#include "spi_soft.h"

#define SPI_DF_EN() PORTD&=~(1<<PD2)
#define SPI_DF_DIS() PORTD|=(1<<PD2)



/*DATA_FLASH端口及指令定义*/
//#define DF_SPI_ON			SPCR = 0x5F
//#define DF_SPI_OFF			SPCR = 0x00
//#define DF_CON_PORT			PORTC
//#define DF_STA_PORT			PINC
//#define DF_STATE			PC2
//#define DF_CS_1				PC1
//#define DF_SELECT_1			DF_CON_PORT &=~_BV(DF_CS_1)
//#define DF_DESELECT_1		DF_CON_PORT |=_BV(DF_CS_1)


#define BUFFER_1_WRITE 0x84					// 写入第一缓冲区
#define BUFFER_2_WRITE 0x87					// 写入第二缓冲区
#define BUFFER_1_READ 0xD4					// 读取第一缓冲区
#define BUFFER_2_READ 0xD6					// 读取第二缓冲区
#define B1_TO_MM_PAGE_PROG_WITH_ERASE 0x83	// 将第一缓冲区的数据写入主存储器（擦除模式）
#define B2_TO_MM_PAGE_PROG_WITH_ERASE 0x86	// 将第二缓冲区的数据写入主存储器（擦除模式）
#define MM_PAGE_TO_B1_XFER 0x53				// 将主存储器的指定页数据加载到第一缓冲区
#define MM_PAGE_TO_B2_XFER 0x55				// 将主存储器的指定页数据加载到第二缓冲区
#define PAGE_ERASE 0x81						// 页删除（每页512/DF_BUFFER_SIZE字节）
#define SECTOR_ERASE 0x7C					// 扇区擦除（每扇区128K字节）
#define READ_STATE_REGISTER 0xD7			// 读取状态寄存器


//extern unsigned char DF_buffer[DF_BUFFER_SIZE];
//unsigned char DF_buffer[DF_BUFFER_SIZE];
extern unsigned char buf[];
#define DF_buffer buf

//往SPI口写一个字节的数据
/*void spiSWTransmit(unsigned char data)
{
	SPDR = data;
	while (!(SPSR & 0x80));
}*/


//格式化主存储器（以扇区<0A,0B,1……15>为单位删除所有页数据）
void DF_format(void)
{
	unsigned char i;
	//DF_SPI_ON;
	
	DF_wait_busy();
	SPI_DF_EN();//	DF_SELECT_1;
	spiSWTransmit(SECTOR_ERASE);
	spiSWTransmit(0x00);
	spiSWTransmit(0x00);
	spiSWTransmit(0x00);
	SPI_DF_DIS();//	DF_DESELECT_1;

	DF_wait_busy();
	SPI_DF_EN();//DF_SELECT_1;
	spiSWTransmit(SECTOR_ERASE);
	spiSWTransmit(0x00);
	spiSWTransmit(0x20);
	spiSWTransmit(0x00);
	SPI_DF_DIS();//DF_DESELECT_1;

	for (i=1;i<16;i++)
	{
		DF_wait_busy();
		SPI_DF_EN();//DF_SELECT_1;
		spiSWTransmit(SECTOR_ERASE);
		spiSWTransmit(i << 2);
		spiSWTransmit(0x00);
		spiSWTransmit(0x00);
		SPI_DF_DIS();//DF_DESELECT_1;
	}
	//DF_SPI_OFF;
}


//擦除指定的主存储器页（地址范围0-4095）
void DF_page_earse(unsigned int page)
{
	//DF_SPI_ON;
	DF_wait_busy();
	
	SPI_DF_EN();//DF_SELECT_1;
	spiSWTransmit(PAGE_ERASE);
	spiSWTransmit((unsigned char)(page >> 6));
	spiSWTransmit((unsigned char)(page << 2));
	spiSWTransmit(0x00);
	SPI_DF_DIS();//DF_DESELECT_1;
	//DF_SPI_OFF;
}


//将保存在数组DF_buffer[]中的一页数据写入第二缓冲区后送入主存储区
//（先擦除后写入模式，页地址范围0-4095）
void DF_write_page(unsigned int page)
{
	unsigned int i;
	//DF_SPI_ON;
	
	DF_wait_busy();
	SPI_DF_EN();//DF_SELECT_1;
	spiSWTransmit(BUFFER_2_WRITE);
	spiSWTransmit(0x00);
	spiSWTransmit(0x00);
	spiSWTransmit(0x00);
	for (i=0;i<DF_BUFFER_SIZE;i++)
	{
		unsigned char tmp;
		tmp=DF_buffer[i];
		spiSWTransmit(tmp);
	}
	SPI_DF_DIS();//DF_DESELECT_1;
	
	if (page<4096)
	{
		SPI_DF_EN();//DF_SELECT_1;
		spiSWTransmit(B2_TO_MM_PAGE_PROG_WITH_ERASE);
		spiSWTransmit((unsigned char)(page>>6));
		spiSWTransmit((unsigned char)(page<<2));
		spiSWTransmit(0x00);
		SPI_DF_DIS();//DF_DESELECT_1;
		DF_wait_busy();
	}
	//DF_SPI_OFF;
}


//将指定主存储器页的数据转入第一缓冲区后读出，保存在DF_buffer[]数组中
//（页地址范围0-4095）
void DF_read_page(unsigned int page)
{
	unsigned int i;
	//DF_SPI_ON;
	
//	while(!(DF_STA_PORT & (1<< DF_STATE)));
	DF_wait_busy();

	SPI_DF_EN();//DF_SELECT_1;
	spiSWTransmit(MM_PAGE_TO_B1_XFER);
	spiSWTransmit((unsigned char)(page >> 6));
    spiSWTransmit((unsigned char)(page << 2));
    spiSWTransmit(0x00);
	SPI_DF_DIS();//DF_DESELECT_1;
	
	DF_wait_busy();
	SPI_DF_EN();//DF_SELECT_1;
	spiSWTransmit(BUFFER_1_READ); 
	spiSWTransmit(0x00);                        
	spiSWTransmit(0x00);   
	spiSWTransmit(0x00);        
	spiSWTransmit(0x00);
	for (i=0;i<DF_BUFFER_SIZE;i++)
	{
		DF_buffer[i] =spiSWTransmit(0xFF);
		//DF_buffer[i] = SPDR;
	}
	SPI_DF_DIS();//DF_DESELECT_1;
	
	//DF_SPI_OFF;
}


//以直接读取方式读取指定的主存储器页数据（页地址范围0-4095）
/*void DF_MM_read_page(unsigned int page)
{
	unsigned int i;
	//DF_SPI_ON;
	
	while(!(DF_STA_PORT & (1<< DF_STATE)));
	SPI_DF_EN();//DF_SELECT_1;
	spiSWTransmit(MAIN_MEMORY_PAGE_READ);
	spiSWTransmit((unsigned char)(page >> 6));
    spiSWTransmit((unsigned char)(page << 2));
    spiSWTransmit(0x00);
	spiSWTransmit(0x00);
	spiSWTransmit(0x00);
	spiSWTransmit(0x00);
	spiSWTransmit(0x00);
	for (i=0;i<DF_BUFFER_SIZE;i++)
	{
		DF_buffer[i] = spiSWTransmit(0x00);
		//DF_buffer[i] = SPDR;
	}
	SPI_DF_DIS();//DF_DESELECT_1;
	
	//DF_SPI_OFF;
}*/


//读取状态寄存器
//	bit7		bit6	bit6	bit6	bit6	bit6	bit6		bit6
//RDY/BUSY		COMP	1		0		1		1		PROTECT		PAGE SIZE	
unsigned char DF_read_reg(void)
{
	unsigned char temp;
	//DF_SPI_ON;
	SPI_DF_EN();//DF_SELECT_1;
	spiSWTransmit(READ_STATE_REGISTER);
	//spiSWTransmit(0x00);
	//spiSWTransmit(0x00);                        
	//spiSWTransmit(0x00);   
	temp=spiSWTransmit(0x00);
	//temp=SPDR;
	SPI_DF_DIS();//DF_DESELECT_1;
	//DF_SPI_OFF;
	return temp;
}


//检查状态寄存器最高位是否为忙，并等待空闲
void DF_wait_busy(void)
{
	unsigned char state_reg=0x00;
	SPI_DF_EN();//DF_SELECT_1;
	spiSWTransmit(READ_STATE_REGISTER);
	//spiSWTransmit(0x00);
	//spiSWTransmit(0x00);                        
	//spiSWTransmit(0x00);
	while((state_reg&0x80) == 0)
	{
		state_reg = spiSWTransmit(0x00);
		//state_reg = SPDR ;
	}
	SPI_DF_DIS();//DF_DESELECT_1;
}


//将指定主存储器页的数据转入指定缓冲区
void DF_mm_to_buf(unsigned char buffer,unsigned int page)
{
	//DF_SPI_ON;
	DF_wait_busy();
	SPI_DF_EN();//DF_SELECT_1;
	if (buffer==1)
		spiSWTransmit(MM_PAGE_TO_B1_XFER);
	else
		spiSWTransmit(MM_PAGE_TO_B2_XFER);
	spiSWTransmit((unsigned char)(page >> 6));
    spiSWTransmit((unsigned char)(page << 2));
    spiSWTransmit(0x00);
	SPI_DF_DIS();//DF_DESELECT_1;
	//DF_SPI_OFF;
}


//读取指定缓冲区指定单元的数据，保存在DF_buffer[]数组中
unsigned char DF_read_buf(unsigned char buffer,unsigned int start_address,unsigned int length)
{
	unsigned int i;
	if ((DF_BUFFER_SIZE-1-start_address)>=length)
	{
		//DF_SPI_ON;
		DF_wait_busy();
		SPI_DF_EN();//DF_SELECT_1;
		if (buffer==1)
			spiSWTransmit(BUFFER_1_READ); 
		else
			spiSWTransmit(BUFFER_2_READ);
		spiSWTransmit(0x00);                        
		spiSWTransmit((unsigned char)(start_address >> 8));   
		spiSWTransmit((unsigned char)start_address);        
		spiSWTransmit(0x00);
		for (i=0;i<length;i++)
		{
			DF_buffer[i] = spiSWTransmit(0xFF);
			//DF_buffer[i] = SPDR;
		}
		SPI_DF_DIS();//DF_DESELECT_1;
		//DF_SPI_OFF;
		return 1;
	}
	else
		return 0;
}


//将DF_buffer[]数组中指定长度的数据写入指定缓冲区
unsigned char DF_write_buf(unsigned char buffer,unsigned int start_address,unsigned int length)
{
	unsigned int i;
	if  ((DF_BUFFER_SIZE-1-start_address)>=length)
	{
		//DF_SPI_ON;
		DF_wait_busy();
		SPI_DF_EN();//DF_SELECT_1;
		if (buffer==1)
			spiSWTransmit(BUFFER_1_WRITE);
		else
			spiSWTransmit(BUFFER_2_WRITE);
		spiSWTransmit(0x00);
		spiSWTransmit((unsigned char)(start_address >> 8));   
		spiSWTransmit((unsigned char)start_address);
		for (i=0;i<length;i++)
			spiSWTransmit(DF_buffer[i]);
		SPI_DF_DIS();//DF_DESELECT_1;
		return 1;
	}
	else
		return 0;
}


//将指定缓冲区中的数据写入主存储区的指定页
void DF_buf_to_mm(unsigned char buffer,unsigned int page)
{
	//DF_SPI_ON;
	DF_wait_busy();
	if (page<4096)
	{
		SPI_DF_EN();//DF_SELECT_1;
		if (buffer==1)
			spiSWTransmit(B1_TO_MM_PAGE_PROG_WITH_ERASE);
		else
			spiSWTransmit(B2_TO_MM_PAGE_PROG_WITH_ERASE);
		spiSWTransmit((unsigned char)(page>>6));
		spiSWTransmit((unsigned char)(page<<2));
		spiSWTransmit(0x00);
		SPI_DF_DIS();//DF_DESELECT_1;
	}
	//DF_SPI_OFF;
}