//==============================================================================
//FileName	=x5043.c
//LastDate	=20080109
//5V時最大的時鐘頻率3.3MHz,所以不要使用指令間延時!
//==============================================================================
#include"x5043.h"
#include"delay_s.h"

//======================================
//	底層傳送接收數(shù)據(jù)的函數(shù)部分
//======================================
//x5043接收1個字節(jié),CPU發(fā)送
static void _x5043_recv_byte(uchar ch)
{
uchar i;
	for(i=8; i!=0; i--)
	{
          	if((ch &0x80) !=0)
          	{
          		X5043_SI_HIGH();
          	}
          	else
          	{
          		X5043_SI_LOW();
          	}
          	X5043_SCK_HIGH();
          	ch <<=1;
		X5043_SCK_LOW();
	}
	X5043_SI_LOW();
}


//x5043送出一個字節(jié),CPU接收
static uchar _x5043_send_byte(void)
{
uchar	i;
uchar	c;

	X5043_SO_HIGH();
	for(i=8; i!=0; i--)
	{
        	X5043_SCK_HIGH();
		
        	c <<=1;
        	if(X5043_GET_SO)
        	{
        		c++;
        	}
        	X5043_SCK_LOW();
        }
	return(c);
}

//讀狀態(tài)寄存器
static uchar _x5043_rdsr_cmd(void)
{
uchar a;
	X5043_CS_LOW();
        _x5043_recv_byte(RDSR_INST);
        a =_x5043_send_byte();     
        X5043_CS_HIGH();
        return(a);
}


//測試寫周期是否結(jié)束,超時后測試不成功也返回
static void _x5043_wip_poll(void)
{
uchar i;
	for(i=MAX_POLL; i!=0; i--)
	{	//STAUS.WIP=0 idel
		if( (_x5043_rdsr_cmd() &0x01) ==0) break;
		delay_50us();
	}
}


//設(shè)置寫使能,在執(zhí)行寫入操作之前要先將寫使能控制位置位
static void _x5043_wren_cmd(void)
{
        X5043_CS_LOW();
        _x5043_recv_byte(WREN_INST);
        X5043_CS_HIGH();
        
}

//寫入數(shù)據(jù)之前的預(yù)操作
//入口:5043的地址
static void _x5043_pre_write(uint addr)
{
        _x5043_wren_cmd();
	X5043_CS_LOW();
        _x5043_recv_byte( (addr &0x0100)==0 ? WRITE_INST: (WRITE_INST |0x08));
	_x5043_recv_byte(addr &0xff);
}


//讀數(shù)據(jù)之前的預(yù)操作
//入口:5043的地址
static void _x5043_pre_read(uint addr)
{
        X5043_CS_LOW();
        _x5043_recv_byte( (addr &0x0100) ==0 ? READ_INST : READ_INST |0x08);
        _x5043_recv_byte(addr &0xff);
}

//======================================
//	外部調(diào)用函數(shù)部分
//======================================
//寫禁能,在非正常的操作中斷后,主程序在初始化時最好執(zhí)行一次此操作
void x5043_wrdi_cmd(void)
{
        X5043_CS_LOW();
        _x5043_recv_byte(WRDI_INST);
        X5043_CS_HIGH();
        
}

//寫狀態(tài)寄存器
void x5043_wrsr_cmd(uchar ctl)
{
        _x5043_wren_cmd();
        
        X5043_CS_LOW();  
        _x5043_recv_byte(WRSR_INST);
        _x5043_recv_byte(ctl);        
        X5043_CS_HIGH();
        
        _x5043_wip_poll();
}

//在指定地址寫入1字節(jié)
//入口:5043的地址,待寫數(shù)據(jù)
void x5043_byte_write(uint addr, uchar c)
{
	X5043_WP_HIGH();

        _x5043_pre_write(addr);
        _x5043_recv_byte(c);
	X5043_CS_HIGH();
	
	_x5043_wip_poll();
	
	X5043_WP_LOW();
}

//從5043的指定地址讀出1字節(jié)
//入口:5043的地址
//出口:數(shù)據(jù)
uchar x5043_byte_read(uint addr)
{
uchar c;
        _x5043_pre_read(addr);
        c =_x5043_send_byte();
        X5043_CS_HIGH();
        return(c);
}

//在指定地址寫入定長字符串
//入口:5043的地址,待寫數(shù)據(jù)串和長度(<16)
void x5043_string_write(uint addr, uchar *str, uchar len)
{
	len &=0x0f;
	if(len ==0) return;
	
	X5043_WP_HIGH();
	_x5043_pre_write(addr);
	for(; len!=0; len--)
	{
		_x5043_recv_byte(*str++);		
	}
	X5043_CS_HIGH();
	
	_x5043_wip_poll();
	X5043_WP_LOW();
}

//在指定地址讀出定長字符串
//入口:5043的地址,存儲數(shù)據(jù)串指針和長度
void x5043_string_read(uint addr, uchar *str, uchar len)
{
	_x5043_pre_read(addr);
	for(; len !=0; len--)
	{
		*str++ =_x5043_send_byte();
	}
	X5043_CS_HIGH();
	
}

//End Of File