/*********************************?（C）?COPYRIGHT?2019?曼珠沙華?****************************************************
*?File?Name??????????:?spi.c
*?Author?????????????:?@曼珠沙華
*?Date???????????????:?2019/8/27
*?Description????????:?spi?file?spi函數文件編寫
*?????????????????????
*?Includes?------------------------------------------------------------------*/
#include?“flash.h“

u8?W25_BUFFER[4096];	???//flash緩沖區大小定義

/***********************************************************************************************
**?????name:?flash_init
**?function:?初始化flash?W25N01GV模塊
**parameter:?void
**???return:?void
**?????date:?2019/8/27
**???create:?@曼珠沙華
************************************************************************************************/
void?flash_init（void）{
	
	SPI1_Init（）;??????????????????????????????//初始化spi1
	SPI1_SetSpeed（SPI_BaudRatePrescaler_4）;		//設置為21M時鐘高速模式?
	FLASH_CS?=?1;?????????????????????????????//拉高cs片選
	W25_Reset（）;
	delay_xms（20）;
	W25_WriteSR（Protection_Register0）;???????//SR1取消保護
	delay_xms（20）;
	
}

/***********************************************************************************************
**?????name:?W25_ReadSR
**?function:?讀取W25的狀態寄存器
						?BIT7???6??????5?????4?????3???????2???????1????0
?????????????NULL???LUT_F??ECC1??ECC0??P_FAIL??E_FAIL??WEL??BUSY
?????????????WEL:寫使能鎖定
?????????????BUSY:忙標記位（1忙;0空閑）
?????????????默認:0x00
**parameter:?sr?寄存器地址
**???return:?寄存器的值
**?????date:?2019/8/27
**???create:?@曼珠沙華
************************************************************************************************/
u8?W25_ReadSR（u8?sr）{??
	
	u8?byte?=?0;??
	
	FLASH_CS?=?0;????????????????????????????//使能器件?
??
	SPI1_ReadWriteByte（W25X_ReadStatusReg）;??//發送讀取狀態寄存器命令????
	SPI1_ReadWriteByte（sr）;??????????????????//發送地址
	byte?=?SPI1_ReadWriteByte（0Xff）;?????????//讀取一個字節??
	
	FLASH_CS?=?1;????????????????????????????//取消片選?
	
	return?byte;???
}?

/***********************************************************************************************
**?????name:?W25_WriteSR
**?function:?寫W25狀態寄存器只有部分位可以寫!!!
**parameter:?sr?寄存器地址
						?data?欲寫入的值
**???return:?void
**?????date:?2019/8/27
**???create:?@曼珠沙華
************************************************************************************************/
void?W25_WriteSR（u8?sru8?data）{???
	
	FLASH_CS?=?0;??????????????????????????????//使能器件?
??
	SPI1_ReadWriteByte（W25X_WriteStatusReg）;???//發送寫狀態寄存器命令????
	SPI1_ReadWriteByte（sr）;????????????????????//發送地址??
	SPI1_ReadWriteByte（data）;??????????????????//發送欲寫入的值
	
	FLASH_CS?=?1;??????????????????????????????//取消片選?????	??????
}???
??
/***********************************************************************************************
**?????name:?W25_Reset
**?function:?重啟flash
**parameter:?void
**???return:?void
**?????date:?2019/8/30
**???create:?@曼珠沙華
************************************************************************************************/
void?W25_Reset（v

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????13027??2019-09-19?14:11??W25N01G\flash.c

?????文件???????2562??2019-09-03?16:31??W25N01G\flash.h

?????文件???????5507??2019-09-03?16:00??W25N01G\spi.c

?????文件????????812??2019-08-27?16:00??W25N01G\spi.h

?????文件????1186750??2019-04-08?21:54??W25N01G\W25N01GVZEIG.PDF

?????目錄??????????0??2020-03-20?17:59??W25N01G

-----------?---------??----------?-----??----

??????????????1208658????????????????????6