基于MSP430的flash擦除读写操作代码

/**************************************************************** * ATMEL的DATAFLASH操作函数库（FOR AT45DB161D） * * * * MSP430F149 // ----------------- // /|\| XIN|- // | | | // --|RST XOUT|- // | | // LED <-|P1.0 P3.1_p5.1|-> Data Out (SIMO0) // | | // Scope <-|P3.4 P3.2_p5.2|<- Data In (SOMI0) // | | // Slave RST <-|P3.5 P3.3_p5.3|-> Serial Clock Out (UCLK) | _p4.7|-> cs *****************************************************************/ #include <msp430x14x.h> #include "AT45DB161D.h" #include "spi.h" //DB161D的初始化 void DB161D_Init() { P5DIR |= 0x10; // CS } //检查状态寄存器最高位是否为忙，并等待空闲 //D7h: 1 1 0 1 0 1 1 1 N/A N/A N/A N/A //Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 //RDY/BUSY COMP 1 0 1 1 PROTECT PAGE SIZE void DF_wait_busy(void) { unsigned char state_reg=0x00; DF_SELECT_1; SPIflash_Write(READ_STATE_REGISTER); while((state_reg&0x80) == 0) { state_reg = SPIflash_Read(); } DF_DESELECT_1; } //格式化主存储器（以扇区<0A,0B,1……15>为单位删除所有页数据） //7Ch 0 1 1 1 1 1 0 0 x x P P P P x x x x x x x x x x x x x x x x x x N/A ( 528字节模式) void DF_format(void) { unsigned char i; DF_SPI_ON; //开SPI使能 DF_wait_busy(); DF_SELECT_1; //P4.7接CS，使CS变成低电平 SPIflash_Write(SECTOR_ERASE); //扇区擦除指令 SPIflash_Write(0x00); //对扇区0A进行擦除 2无关位+9位页地址（PA11--PA3）+13无关位 SPIflash_Write(0x00); SPIflash_Write(0x00); DF_DESELECT_1; //CS变高电平，结束操作 DF_wait_busy(); DF_SELECT_1; SPIflash_Write(SECTOR_ERASE); //对扇区0B进行擦除 SPIflash_Write(0x00); SPIflash_Write(0x20); SPIflash_Write(0x00); DF_DESELECT_1; for (i=1;i<16;i++) { //对扇区1--扇区15进行擦除 DF_wait_busy(); DF_SELECT_1; SPIflash_Write(SECTOR_ERASE); SPIflash_Write(i << 2); SPIflash_Write(0x00); SPIflash_Write(0x00); DF_DESELECT_1; } DF_SPI_OFF; } //擦除指定的主存储器页（地址范围0-4095）一共就有4095个页 无预擦除 //81h 1 0 0 0 0 0 0 1 x x P P P P P P P P P P P P x x x x x x x x x x N/A （528字节模式） void DF_page_earse(unsigned int page) { DF_SPI_ON; DF_wait_busy(); DF_SELECT_1; SPIflash_Write(PAGE_ERASE); //写页擦除指令0x81H + 3字节地址 （2个无关位，12位页地址 PA11~P10 与10个无关位） SPIflash_Write((unsigned char)(page >> 6)); //因为前两位是无关位，所以左移 SPIflash_Write((unsigned char)(page << 2)); //后两位是无关会，所以右移 SPIflash_Write(0x00); DF_DESELECT_1; DF_SPI_OFF; } //将保存在数组DF_buffer[]中的一页数据写入第一或者第二缓冲区后送入主存储区 //（先擦除后写入模式，页地址范围0-4095） // 写缓冲区 指令码 + 3字节地址（ 14位无关位 + 10位缓冲区地址 BFA9~BFA0 ） //缓冲区1：84h 1 0 0 0 0 1 0 0 x x x x x x x x x x x x x x B B B B B B B B B B N/A（528字节模式） //缓冲区2：87h 1 0 0 0 0 1 1 1 x x x x x x x x x x x x x x B B B B B B B B B B N/A（528字节模式） //缓冲区向主存储页写 指令码 + 3字节地址 （ 2无关位 + 12位页地址 PA11~PA0 + 10个无关位） //缓冲区1：83h 1 0 0 0 0 0 1 1 x x P P P P P P P P P P P P x x x x x x x x x x N/A //缓冲区2: 86h 1 0 0 0 0 1 1 0 x x P P P P P P P P P P P P x x x x x x x x x x N/A void DF_write_page(unsigned char buffer, unsigned int page,unsigned char *DF_buffer,unsigned int length) //先给定缓冲区号，再给定页地址 { unsigned int i; DF_SPI_ON; DF_wait_busy(); DF_SELECT_1; if(buffer == 1) SPIflash_Write(BUFFER_1_WRITE); //写入缓冲区1 else SPIflash_Write(BUFFER_2_WRITE); //写入缓冲区2 SPIflash_Write(0x00); //从缓冲区的地址0开始写 SPIflash_Write(0x00); SPIflash_Write(0x00); for (i=0;i<length;i++) //写入缓冲区 SPIflash_Write(DF_buffer[i]); DF_DESELECT_1; if (page<4096) { //缓冲区的数据写入主存储区 DF_SELECT_1; if(buffer == 1) SPIflash_Write(B1_TO_MM_PAGE_PROG_WITH_ERASE); //第一缓冲区的数据写入主存储器（擦除模式） else SPIflash_Write(B2_TO_MM_PAGE_PROG_WITH_ERASE); //第二缓冲区的数据写入主存储器（擦除模式） SPIflash_Write((unsigned char)(page>>6)); //给定地址 SPIflash_Write((unsigned char)(page<<2)); SPIflash_Write(0x00); DF_DESELECT_1; DF_wait_busy(); } DF_SPI_OFF; } //将指定主存储器页的数据转入缓冲区后读出，保存在DF_buffer[]数组中 //（页地址范围0-4095） // 53h: 0 1 0 1 0 0 1 1 x x P P P P P P P P P P P P x x x x x x x x x x N/A // 55h: 0 1 0 1 0 1 0 1 x x P P P P P P P P P P P P x x x x x x x x x x N/A // D4h: 1 1 0 1 0 1 0 0 x x x x x x x x x x x x x x B B B B B B B B B B 1 // D6h: 1 1 0 1 0 1 1 0 x x x x x x x x x x x x x x B B B B B B B B B B 1 void DF_read_page(unsigned char buffer, unsigned int page,unsigned char *DF_buffer,unsigned int length) { unsigned int i; DF_SPI_ON; DF_wait_busy(); DF_SELECT_1; if(buffer == 1) SPIflash_Write(MM_PAGE_TO_B1_XFER); // 将主存储器的指定页数据加载到第一缓冲区 else SPIflash_Write(MM_PAGE_TO_B2_XFER); // 将主存储器的指定页数据加载到第二缓冲区 SPIflash_Write((unsigned char)(page >> 6)); SPIflash_Write((unsigned char)(page << 2)); SPIflash_Write(0x00); DF_DESELECT_1; DF_wait_busy(); DF_SELECT_1; if(buffer == 1) SPIflash_Write(BUFFER_1_READ); // 读取第一缓冲区 else SPIflash_Write(BUFFER_2_READ); // 读取第二缓冲区 SPIflash_Write(0x00); SPIflash_Write(0x00); SPIflash_Write(0x00); SPIflash_Write(0x00); for (i=0;i<length;i++) { DF_buffer[i] = SPIflash_Read(); } DF_DESELECT_1; DF_SPI_OFF; } //以直接读取方式读取指定的主存储器页数据（页地址范围0-4095） //D2h: 1 1 0 1 0 0 1 0 x x P P P P P P P P P P P P B B B B B B B B B B 4 void DF_MM_read_page(unsigned int page,unsigned char *DF_buffer,unsigned int length) { unsigned int i; DF_SPI_ON; DF_wait_busy(); DF_SELECT_1; SPIflash_Write(MM_PAGE_READ); SPIflash_Write((unsigned char)(page >> 6)); SPIflash_Write((unsigned char)(page << 2)); SPIflash_Write(0x00); SPIflash_Write(0x00); SPIflash_Write(0x00); SPIflash_Write(0x00); SPIflash_Write(0x00); for (i=0;i<length;i++) { DF_buffer[i] = SPIflash_Read(); } DF_DESELECT_1; DF_SPI_OFF; } //读取状态寄存器 //bit7 bit6 bit6 bit6 bit6 bit6 bit6 bit6 //RDY/BUSY COMP 1 0 1 1 PROTECT PAGE SIZE //D7h: 1 1 0 1 0 1 1 1 N/A N/A N/A N/A unsigned char DF_read_reg(void) { unsigned char temp; DF_SPI_ON; DF_SELECT_1; SPIflash_Write(READ_STATE_REGISTER); temp = SPIflash_Read(); DF_DESELECT_1; DF_SPI_OFF; return temp; } //将指定主存储器页的数据转入指定缓冲区 //53h: 0 1 0 1 0 0 1 1 x x P P P P P P P P P P P P x x x x x x x x x x N/A //55h: 0 1 0 1 0 1 0 1 x x P P P P P P P P P P P P x x x x x x x x x x N/A void DF_mm_to_buf(unsigned char buffer,unsigned int page) { DF_SPI_ON; DF_wait_busy(); DF_SELECT_1; if (buffer==1) SPIflash_Write(MM_PAGE_TO_B1_XFER); else SPIflash_Write(MM_PAGE_TO_B2_XFER); SPIflash_Write((unsigned char)(page >> 6)); SPI