www.pudn.com > Sunplusvoice.rar > Flash.asm

.include hardware.inc 
 
.define C_FLASH_SIZE			0x8000 
.define C_FLASH_BLOCK_SIZE		0x100  
.define C_FLASH_MATCH			0xAAAA 
.define C_FLASH_PAGE_ERASE		0x5511		//erase 1 page 
.define C_FLASH_MASS_ERASE		0x5522		//only can execution on STOP=1 
.define C_FLASH_1WORD_PGM		0x5533		//write 1 word  
.define C_FLASH_SEQUENT_PGM		0x5544		//write sequential word  
.define C_FLASH_MAIN_BLOCK		0x5555		// 
.define C_FLASH_INFORM_BLOCK	0x5566		// 
.define P_Flash_Ctrl  			0x7555 
 
//*********************************************************// 
//函数:F_FlashWrite1Word() 
//描述:写一个字到FLASH中 
//参数:	1、被写数据的存储地址 
//		2、被写数据 
//返回:无 
//*********************************************************// 
.CODE 
.public _F_FlashWrite1Word 
_F_FlashWrite1Word:		.proc  
	push bp to [sp] 
	bp=sp+1 
	r1=C_FLASH_MATCH				//AAAA 
	[P_Flash_Ctrl]=r1 
	r1=C_FLASH_1WORD_PGM			//5533 
	[P_Flash_Ctrl]=r1	 
	r1=[bp+3]						//flash address 
	r2=[bp+4]						//data 
	[r1]=r2 
	//delay 40us					//dont need,hardware auto block cpu 
 
	pop bp from [sp] 
	retf 
	.endp 
 
//*********************************************************// 
//函数:F_FlashWrite() 
//描述:顺序写多个字 
//参数：1、被写数据的起始地址 
//		2、被写数据 
//		3、写数据的数量 
//返回:无 
//*********************************************************// 
.public _F_FlashWrite 
_F_FlashWrite:		.proc  
	push bp to [sp] 
	bp=sp+1 
	r1=[bp+3]						//flash base address 
	r2=[bp+4]						//data 
	r3=[bp+5]						//nBytes 
	r4=C_FLASH_MATCH				//AAAA 
	[P_Flash_Ctrl]=r4 
L_FlashWriteLoop: 
	r4=C_FLASH_SEQUENT_PGM			//5544 
	[P_Flash_Ctrl]=r4	 
	r4=[r2++] 
	[r1++]=r4 
	//delay 40us					//hardware auto block cpu 
	r3-=1 
	jnz L_FlashWriteLoop	 
	[P_Flash_Ctrl]=r3				//end write 
	pop bp from [sp] 
	retf 
	.endp 
 
//*********************************************************// 
//函数:F_FlashErase() 
//描述:擦除256字节 
//参数:擦除页的起始地址 
//返回:无 
//*********************************************************// 
.public _F_FlashErase 
_F_FlashErase:		.proc  
	push bp to [sp] 
	bp=sp+1 
 
	r1=C_FLASH_MATCH				//AAAA 
	[P_Flash_Ctrl]=r1 
	r1=C_FLASH_PAGE_ERASE			//5511 
	[P_Flash_Ctrl]=r1 
	 
	r1=[bp+3]						//erase page 
	[r1]=r1 
	//delay 20ms					//dont need,hardware auto block cpu 
	pop bp from [sp] 
	retf 
	.endp 
//*********************************************************// 
//函数:F_FlashRead() 
//描述:从flash中读出数据 
//参数:所读数据的存储地址 
//返回:无 
//*********************************************************// 
.public _F_FlashRead 
_F_FlashRead:		.proc  
	push bp to [sp] 
	bp=sp+1 
	r2=[bp+3] 
	r1=[r2] 
	pop bp from [sp] 
	retf 
	.endp