iap1.c

来自「很强的射频卡reader源代码」· C语言 代码 · 共 164 行

//SST89e554 IAP
#include <intrins.h>
#include "reader.h"
#include "iap.h"
//#include "sst89e554rc.h"
pdata unsigned char IAPbuffer[128]=0;
unsigned char read_byte_Flash(unsigned int byte_address)
{
	unsigned char ch;
	SFCF =SFCF | 0x40;
	SFAL=(unsigned char)(byte_address);
	SFAH=(unsigned char)(byte_address>>8);
	SFCM=ByteVerify;
	_nop_();
	ch =SFDT ;
	SFCF=SFCF&0xBF;
	SFDT=0;
	return  ch;
}

void read_Flash(unsigned int byte_address, unsigned char *buff, unsigned char len)
{
	SFCF =SFCF|0x40;
	while(len) 
	{
		SFAL=(unsigned char)(byte_address);
		SFAH=(unsigned char)(byte_address>>8);
		SFCM=ByteVerify;
		_nop_();
		*buff=SFDT ;
		buff++;
		byte_address++;
		len--;
	}
	SFCF=SFCF&0xBF;
	SFDT=0;
//	return ;
}

void sector_erase(unsigned char byte_address)            //扇区擦除
{
	SFCF=SFCF|0x40;                       //enable iap
	SFAL=(unsigned char)(byte_address);
	SFAH=(unsigned char)(byte_address>>8);
	SFCM=SectorEase;
	while(SFST&0X4){}
	SFCF=SFCF&0xBF;
	SFDT=0;
}

unsigned char pgm_byte_Flash(unsigned int byte_address, unsigned char ch)
{
	SFCF =SFCF | 0x40;
	SFAL=(unsigned char)(byte_address);
	SFAH=(unsigned char)(byte_address>>8);
	SFDT= ch;
	SFCM= ByteProgram;
	while(SFST&0x04){}
	SFCF=SFCF&0xBF;
	SFDT=0;
	return  ch;
}

void write_byte_Flash(unsigned int byte_address, unsigned char ch)
{
	unsigned char i;
	unsigned char pdata *buff;
	SFCF =SFCF | 0x40;
	// save block data
	SFAH=(unsigned char)(byte_address>>8);
	SFAL=(unsigned char) (byte_address) & 0x80;
	buff = IAPbuffer;
	for (i=128; i>0; i--)
	{
		SFCM=ByteVerify;
		_nop_();
		*buff=SFDT ;
		buff++;
		SFAL++;
	} 
	// set new data
	IAPbuffer[(unsigned char) (byte_address)] = ch;
	// erase Sector
	SFAH=(unsigned char)(byte_address>>8);
	SFAL=(unsigned char) (byte_address);
	SFCM=SectorEase;
	while(SFST&0x04){}
	// program data
	SFAH=(unsigned char)(byte_address>>8);
	SFAL=(unsigned char) (byte_address) & 0x80;
	buff = IAPbuffer;
	for (i=128; i>0; i--)
	{
		SFDT=*buff;
		SFCM=ByteProgram;
		while(SFST&0x04){}
		buff++;
		SFAL++;
	} 
	SFCF=SFCF&0xBF;
	SFDT=0;
}

void write_Flash(unsigned int byte_address, unsigned char *dat, unsigned char len)
{
	unsigned char i;
	unsigned char pdata *buff;

	SFCF =SFCF | 0x40;

	while (len)
	{
		// save sector data
		SFAH=(unsigned char)(byte_address>>8);
		SFAL=(unsigned char) (byte_address) & 0x80;
	
		buff = IAPbuffer;
		for (i=128; i>0; i--)
		{
			SFCM=ByteVerify;
			_nop_();
			*buff=SFDT ;
	
			buff++;
			SFAL++;
		} 
	
		buff = IAPbuffer + (((unsigned char)(byte_address)) & 0x7F);
		for (; buff<128; buff++)
		{
			*buff = *dat;
			dat++;
			if (--len == 0) break;
		}
	
		// erase Sector
		SFAH=(unsigned char)(byte_address>>8);
		SFAL=(unsigned char) (byte_address) & 0x80;
		SFCM=SectorEase;
		while(SFST&0x04){}
	
		// program data
		SFAH=(unsigned char)(byte_address>>8);
		SFAL=(unsigned char) (byte_address) & 0x80;
	
		buff = IAPbuffer;
		for (i=128; i>0; i--)
		{
			SFDT=*buff;
			SFCM=ByteProgram;
			while(SFST&0x04){}
	
			buff++;
			SFAL++;
		} 
		
		byte_address = (byte_address & 0xFF80) + 0x80;
	}

	SFCF=SFCF&0xBF;
	SFDT=0;
}