mm36sb020.c

本程序是在w77e58上对mm36sb020的控制程序源码

#include <w77c32.h>
#include "mm36sb020.h"

//total 2048 page,every page store 10 card number
//the last 1800 page store card number
//the first 248 page4 store list of card
//0--46 are not used 
//47,48 are store list of list of list of card
//49---66 are store list of list of card
//67----246 are store list of card
//247--tail are store card number

sbit wdi=P2^6;

void test_mm(void);

void init_mm36sb020()
{
	unsigned int j;

	P4&=0x0e;
	P4|=0x08;

	SoftReset();
	for(j=0;j<3000;j++)wdi^=1;

test_mm();
}

void test_mm()
{
/*
	unsigned int j;
	unsigned char buf[128];

	for (j = 0;j < 128;j++)
		{
		buf[j] = 0;
		}
	SequentialWrite(buf,0,128);
	AutoProgram(0);
	for(j=0;j<3000;j++)
		wdi^=1;

	for (j = 0;j < 128;j++)
		{
		buf[j] = 1;
		}
	SequentialWrite(buf,0,128);
	AutoProgram(1);
	for(j=0;j<3000;j++)
		wdi^=1;

	for (j = 0;j < 128;j++)
		{
		buf[j] = 2;
		}
	SequentialWrite(buf,0,128);
	AutoProgram( 2 );
	for(j=0;j<3000;j++)
		wdi^=1;

	SequentialRead( buf,128*0,5 );
	if( (buf[0]==0)&&(buf[1]==0)&&(buf[2]==0)&&(buf[3]==0)&&(buf[4]==0) )
		j=0;
	else
		{
		for(;;)wdi^=1;
		}

	SequentialRead( buf,128*1,5 );
	if( (buf[0]==1)&&(buf[1]==1)&&(buf[2]==1)&&(buf[3]==1)&&(buf[4]==1) )
		j=0;
	else
		{
		for(;;)wdi^=1;
		}

	SequentialRead( buf,128*2,5 );
	if( (buf[0]==2)&&(buf[1]==2)&&(buf[2]==2)&&(buf[3]==2)&&(buf[4]==2) )
		j=0;
	else
		{
		for(;;)wdi^=1;
		}
*/
}

void do_clear_all_database_data()
{
}

void SoftReset(void)
{
	SendByte(0xfe);
	SendByte(0xff);
	SendByte(0xff);
	SendByte(0xff);
}

void EraseChip(void)
{
	SendByte(0xf6);
	SendByte(0x90);
}

unsigned char ReadStatusRegister(void)
{
	SendByte(0x94);
	return(GetByte());
}


//read data from flash to mcu
//_addr lowest 7 bit is in page address
//_addr higher 16 bit is page address
//len is length to be read
void SequentialRead(unsigned char *_DES,unsigned long _ADDR,unsigned char _LEN)
{
	unsigned char i;

	SendByte(0x9c);
	SendByte(_ADDR & 0x7f);
	_ADDR <<= 1;
	SendByte(_ADDR >> 8);
	SendByte(_ADDR >> 16);
	*DES++ = GetByte();
	for (i = 1;i < _LEN;i++)
		{
		SendByte(0xa0);
		*DES++ = GetByte();
		}
}

//write data to mm36sb020 buffer
//_src is buffer is mcu
//_addr is pointer of buffer in mm36sb020
//_len is length 
void SequentialWrite(unsigned char *_SRC,unsigned char _ADDR,unsigned char _LEN)
{
	unsigned char i;

	SendByte( 0xa8 );
	SendByte( _ADDR );
	SendByte( *_SRC++ );
	for ( i = 1;i < _LEN;i++ )
		{
		SendByte( 0xac );
		SendByte( *_SRC++ );
		}
}

//write mm36sb020 buffer to flash
//_ADDR is pointer of page
void AutoProgram(unsigned int _ADDR)
{
	SendByte(0xb0);
	SendByte(_ADDR);
	SendByte(_ADDR >> 8);
}

void DirectProgram(unsigned int _ADDR)
{
	SendByte(0xb4);
	SendByte(_ADDR);
	SendByte(_ADDR >> 8);
}

unsigned char GetByte(void)
{
	unsigned char i,temp;
	unsigned char j;
	unsigned char a;

	P4|=0x02;

	for (i = 0; i < 8; i++)
		{
		P4&=0x0b;

		for(j=0;j<1;j++);
		temp >>= 1;
		P4|=0x04;
		for(j=0;j<1;j++);
		a=P4;
		a&=0x02;
		if( a )
			temp |= 0x80;
		}
	P4&=0x0b;
	return(temp);
}

void SendByte(unsigned char _CHR)
{
	unsigned char i;

	unsigned char j;

	for (i = 0; i < 8; i++)
		{
		P4&=0x0b;
		for(j=0;j<1;j++);
		if( _CHR&0x01 ==0x01 )
			{
			P4|=0x02;
			}
		else
			{
			P4&=0x0d;
			}

		P4|=0x04;
		for(j=0;j<1;j++);
		_CHR >>= 1;
		}
	P4&=0x0b;
}