MODE 为数据线的输入输出模式 为单片机的PXMDOUT DBOUT 为输出模式 DBus 为数据端口 Px /--------FL命令传送------// void Comm_Latch_Cycle(uchar COMMAND) { uchar SFRPAGE_SAVE = SFRPAGE; SFRPAGE = CFIG_PAGE; DBMODE = DBOUT; ALE=0; ALE=0; CLE=1; RE=1; WE=1; DBus=COMMAND; //WRI COMMAND WE=0; WE=1; CLE=0; ALE=0; SFRPAGE = SFRPAGE_SAVE; } //------------------ 传送地址------------------------------ void Add_Latch_Cycle(uint A ) //传送地址，ADDR为页地址,从addr页第0字节开始 { uchar SFRPAGE_SAVE = SFRPAGE; SFRPAGE = CONFIG_PAGE; DBMODE= DBOUT; CLE=0; ALE=1; RE=1; WE=1; DBus=0; //A0-A7，column address WE=0; WE=1; DBus=(uchar)ADDR; //A9-A16 ,Row Address page address A12-A29 WE=0; WE=1; DBus=(uchar)(ADDR>>8); //A17-A24,Row Address WE=0; WE=1; ALE=0; CLE=0; SFRPAGE = SFRPAGE_SAVE; } //读状态,状态正确时返回0，错误时返回1 uchar Status_Read(void) { uchar Status; Comm_Latch_Cycle(0x70); Status=Read_Byte(); Status=Status & 0x01; return Status; //status=0 erease ok else failled } //从FLASH读一个字节 uchar Read_Byte(void) //read one byte from flash { uchar Rdata; char SFRPAGE_SAVE = SFRPAGE; SFRPN=CONFIG_PAGE; DBMODE = DBIN; //Data Bus input mode DBus = 0xFF; ALE =0; CLE =0; RE =1; RE =0; Rdata =DBus; RE=1; SFRPAGE = SFRPAGE_SAVE; return(Rdata); } //------------------Block Erease------------------------------ uchar Block_Erase(uint page_number) // { uchar SFRPAGE_SAVE = SFRPAGE; SFRPAGE = CONFIG_PAGE; DBMODE= DBOUT; Comm_Latch_Cycle(0x60); ALE=1; CLE=0; DBus=(uchar)page_number; //A9-A16 WE=0; WE=1; DBus=(uchar)(page_number>>8); //A17-A24 WE=0; WE=1; ALE=0; CLE=0; Comm_Latch_Cycle(0xD0); SFRPAGE = CONFIG_PAGE; RB = 1; while(!RB); SFRPAGE=SFRPAGE_SAVE; return Status_Read(); //status =1,Bad Block; Status = 0, Erease OK }
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