flashat45db161d驱动模块源码.C.doc

声明: 希望使用者保留本人的相关信息,当然了,要面试时用除外,呵呵/* 模块注释 *模块名:E:_ldr_my_prjSW_PRJSRCEX_DEV_DRVat45db161d.c模块功能:提供操作 flash:AT45DB161D 的必要的接口,简单明了.存在问题:1) 如果突然断电,很可能要会丢掉1page数据, 原来的模块也存在这样的问题, 电脑windows系统也有.2) 没有考虑坏页的问题.把flash的两个ram分别用作wbuf和rbuf.全局设定:全局依赖:与 flash 芯片通信的驱动模块编程语言: ANSI C作者及日期:练达荣2015/06/18版本:V1.0修改及日期:*/#include #include #include ./delay.h#include ./uart.h#include ./stc_spi.h#define _DELCALE_IN_THIS_FILE_#include at45db161d.h/#define DEBUG_THIS_MODULE#if 0/def DEBUG_THIS_MODULE#define DEBUG_uart1_Sendbuf(buffer,bytes16)uart1_Sendbuf(buffer,bytes16)#define DEBUG_uart1_SendString(str)uart1_SendString(str)#define DEBUG_uart1_SendByte(dat8)uart1_SendByte(dat8)#else#define DEBUG_uart1_Sendbuf(buffer,bytes16)#define DEBUG_uart1_SendString(str)#define DEBUG_uart1_SendByte(dat8)#endif/ 移植相关 /#define SPI_CSP12 /外部flash SPI使能信号#define Select_Flash() SPI_CS=0#define UnSelect_Flash() SPI_CS=1#definewrite1Byte(x)spi_WriteRead1Byte(x)#define read1Byte()spi_WriteRead1Byte(0)/ FLASH 操作命令 /#define PAGE_TO_B1_XFER 0x53 / main memory page to buffer 1 transfer#define PAGE_TO_B2_XFER 0x55 / main memory page to buffer 2 transfer#define PAGE_TO_B2_COMP 0x61 / main memory page compare to buffer 2#define B2_TO_PAGE_WITH_ERASE 0x86 / buffer 2 to main memory page program with built-in erase#define STATUS_REGISTER 0xD7#define BUFFER_1_READ 0xD1 / D4 buffer 1 read (change to 0xD4 for SPI mode 0,3)#define FLASH_CMD_ReadID0x9f/ 读取芯片32位ID.#define BUFFER_2_WRITE 0x87 / buffer 2 write#define BUFFER_2_READ 0xD3 / D6 buffer 2 read (change to 0xD6 for SPI mode 0,3)/ 纯软件部分 /typedef structUINT16 pageIdRead;/ 04095 当前读的页地址UINT16 pageIdWrite;/ 04095 当前写的页地址T_FlashCtrl;static T_FlashCtrl ctl;typedef enumE_ReadBuffer,E_WriteBufferET_BufReadWrite;/* Function: 检测并等待器件忙状态* Description:过读状态寄存器来检测忙状态* Calls:-* Input:-* Output: -* Return:* */static void FLASH_Wait_Busy(void)Select_Flash();write1Byte(STATUS_REGISTER);while(1)if(read1Byte() & 0x80) /读取的最高位1时器件忙break;UnSelect_Flash();/* Function: 缓冲区(write buffer)数据与FLASH指定页比较* Description:状态寄存器bit 6为0 表示比较数据想匹配，1表示比较数据不相匹配* Calls:-* Input:-* Output: TRUE不相同FALSE相同* Return:* */static UINT8 flash_buffer_compareUnsame(UINT16 page)Select_Flash();write1Byte(PAGE_TO_B2_COMP);write1Byte(UINT8)(page 6);write1Byte(UINT8)(page 6);write1Byte(UINT8)(page 6);write1Byte(UINT8)(page 8);write1Byte(UINT8)addr);for(i = 0; i 8);write1Byte(UINT8)addr);for(i = 0; i 8);write1Byte(UINT8)addr);for(i = 0; i = FLASH_TOTAL_BYTES | addr + bytes FLASH_TOTAL_BYTES)return FALSE;DEBUG_uart1_SendString(FFWWBBBBrn);if(page != ctl.pageIdWrite)/ 写的不是当前页,先保存当前页到flash.DEBUG_uart1_SendString(FFWW0000rn);DEBUG_uart1_Sendbuf(UINT8*)&page, sizeof(page);DEBUG_uart1_Sendbuf(UINT8*)&ctl.pageIdWrite, sizeof(ctl.pageIdWrite);Write_Page_From_Buffer(ctl.pageIdWrite);ctl.pageIdWrite = page;Load_Page_To_Buffer(ctl.pageIdWrite, E_WriteBuffer);while(beginAddr + bytes BYTES_PER_PAGE)/ 超出原来的页DEBUG_uart1_SendString(FFWW1111rn);DEBUG_uart1_Sendbuf(UINT8*)&beginAddr, sizeof(beginAddr);DEBUG_uart1_Sendbuf(UINT8*)&bytes, sizeof(bytes);DEBUG_uart1_Sendbuf(UINT8*)&ctl.pageIdWrite, sizeof(ctl.pageIdWrite);bytes_will_write = BYTES_PER_PAGE - beginAddr;Write_Data2FlashBuffer(beginAddr, buf, bytes_will_write);if(flash_buffer_compareUnsame(ctl.pageIdWrite)DEBUG_uart1_SendString(FFWW2222rn);Write_Page_From_Buffer(ctl.pageIdWrite);buf += bytes_will_write;bytes -= bytes_will_write;beginAddr = 0;ctl.pageIdWrite+;Load_Page_To_Buffer(ctl.pageIdWrite, E_WriteBuffer);if(bytes != 0)DEBUG_uart1_SendString(FFWW3333rn);DEBUG_uart1_Sendbuf(UINT8*)&beginAddr, sizeof(beginAddr);DEBUG_uart1_Sendbuf(UINT8*)&bytes, sizeof(bytes);DEBUG_uart1_Sendbuf(buf, bytes);Write_Data2FlashBuffer(beginAddr, buf, bytes);return TRUE;/*原型:UINT16 flash_read(UINT32 addr,UINT8 *savebuf,UINT16 bytes)功能:从 flash 的绝对地址中, 读出特定的字节数, 可能只是读 read buffer ,也可能两个都读.约定: 任何时候的ctl.pageIdWrite所对应的页都会被读到相应write buf里,并且只可能比flash里新.入参:UINT32 addrflash的绝对字节地址(0 2MByte,每个page最后16字节不要,但认为是连续的2MBytes)UINT8 *buf等待保存的数据UINT16 bytes要保存数据字节数出参:实际读成功的字节数.运行环境:调用说明:作者:练达荣2015/06/18*/UINT16 flash_read(UINT32 addr,UINT8 *savebuf,UINT16 bytes)UINT16 page = addr/BYTES_PER_PAGE;UINT16 beginAddr = addr % BYTES_PER_PAGE;UINT16 bytes_will_read;UINT16 rbytes_true;if(addr = FLASH_TOTAL_BYTES)return 0;if(addr + bytes FLASH_TOTAL_BYTES)bytes = FLASH_TOTAL_BYTES - addr;rbytes_true = bytes;DEBUG_uart1_SendString(FFRR0000rn);DEBUG_uart1_Sendbuf(UINT8*)&addr, sizeof(addr);DEBUG_uart1_Sendbuf(UINT8*)&beginAddr, sizeof(beginAddr);DEBUG_uart1_Sendbuf(UINT8*)&page, sizeof(page);DEBUG_uart1_Sendbuf(UINT8*)&bytes, sizeof(bytes);if(page != ctl.pageIdRead)/ 读的数据不在当前读buf页,可能要重新load.DEBUG_uart1_SendString(FFRR1111rn);DEBUG_uart1_Sendbuf(UINT8*)&ctl.pageIdRead, sizeof(ctl.pageIdRead);DEBUG_uart1_Sendbuf(UINT8*)&ctl.pageIdWrite, sizeof(ctl.pageIdWrite);if(page = ctl.pageIdWrite)/ 与当前写的页相同, 看数据是否有更新.if(flash_buffer_compareUnsame(ctl.pageIdWrite)Write_Page_From_Buffer(ctl.pageIdWrite);Load_Page_To_Buffer(page, E_ReadBuffer);/ 读的数据 不在当前页.ctl.pageIdRead = page;while(beginAddr + bytes BYTES_PER_PAGE)/ 超出原来的页bytes_will_read = BYTES_PER_PAGE - beginAddr;DEBUG_uart1_SendString(FFRR2222rn);DEBUG_uart1_Sendbuf(UINT8*)&bytes, sizeof(bytes);DEBUG_uart1_Sendbuf(UINT8*)&beginAddr, sizeof(beginAddr);DEBUG_uart1_Sendbuf(UINT8*)&ctl.pageIdRead, sizeof(ctl.pageIdRead);DEBUG_uart1_Sendbuf(UINT8*)&bytes_will_read, sizeof(bytes_will_read);Read_DataFromFlashBuffer(beginAddr, savebuf, bytes_will_read);savebuf += bytes_will_read;bytes -= bytes_will_read;beginAddr = 0;ctl.pageIdRead+;Load_Page_To_Buffer(ctl.pageIdRead, E_ReadBuffer);if(bytes != 0)Read_DataFromFlashBuffer(beginAddr, savebuf, bytes);DEBUG_uart1_SendString(FFRR3333rn);DEBUG_uart1_Sendbuf(UINT8*)&ctl.pageIdRead, sizeof(ctl.pageIdRead);DEBUG_uart1_Sendbuf(UINT8*)&bytes, sizeof(bytes);DEBUG_uart1_Sendbuf(UINT8*)&beginAddr, sizeof(beginAddr);return rbytes_true;/*原型:功能:读取 flash 芯片ID, 长度为4字节,可以用作软件加密用途.入参:UINT8 *buf保存读出的设备ID出参:无运行环境:调用说明:作者:练达荣2015/06/18*/void flash_read_deviceID(UINT8 *buf)UINT8 i;Select_Flash();write1Byte(FLASH_CMD_ReadID);for(i = 0; i 4; i+)bufi = read1Byte();/SPI_Write_Byte(0xff);UnSelect_Flash();/模块测试部分/#ifdef DEBUG_THIS_MODULE#include ./uart.h/UINT8 wbufBYTES_PER_PAGE;/UINT8 rbufBYTES_PER_PAGE;static void debug_flagView(UINT8 dat)DEBUG_uart1_SendByte(0x55);DEBUG_uart1_SendByte(0x66);DEBUG_uart1_SendByte(0x77);DEBUG_uart1_SendByte(0x88);DEBUG_uart1_SendByte(dat);static void debug_FillFlash(UINT32 begin, UINT32 end)UINT32 addr;for(addr=begin; addr end; addr+=4)flash_write_ok(addr, (UINT8*)&addr, sizeof(addr);static void test_scan_time(void);static void test_ok(void);void test_flash(void)test_scan_time();/ UINT32 addr;/ UINT16 i;/ / /test_ok();/ / for(i=0; iBYTES_PER_PAGE; i+)/ / wbufi = i % 256;/ 256?0x5A:0xA5;/ / / read id/ flash_read_deviceID(rbuf);/ for(i=0; i4; i+)/ / DEBUG_uart1_SendByte(rbufi);/ / / / 写 & 读 整页/ addr = BYTES_PER_PAGE * 200;/ if(flash_write_ok(addr, wbuf, sizeof(wbuf)/ / if(flash_write_ok(addr+BYTES_PER_PAGE, wbuf, sizeof(wbuf)/ / debug_flagView(1);/ memset(rbuf, 0, sizeof(rbuf);/ flash_read(addr, rbuf, sizeof(rbuf);/ DEBUG_uart1_Sendbuf(rbuf,sizeof(rbuf);/ / / / 写 & 读 跨页测试/ addr = BYTES_PER_PAGE * 10 + BYTES_PER_PAGE/2;/ if(flash_write_ok(addr, wbuf, sizeof(wbuf)/ / if(flash_write_ok(addr+BYTES_PER_PAGE, wbuf, sizeof(wbuf)/ / debug_flagView(2);/ memset(rbuf, 0, sizeof(rbuf);/ flash_read(addr - 5, rbuf, sizeof(rbuf);/ for(i=0; iBYTES_PER_PAGE; i+)/ / DEBUG_uart1_SendByte(rbufi);/ / / / / 写 & 读 页末前面边沿测试/ addr = BYTES_PER_PAGE * 30 - 10;/ if(flash_write_ok(addr, wbuf, sizeof(wbuf)/ / if(flash_write_ok(addr+BYTES_PER_PAGE, wbuf, sizeof(wbuf)/ / debug_flagView(4);/ memset(rbuf, 0, sizeof(rbuf);/ flash_read(addr - 20, rbuf, sizeof(rbuf);/ for(i=0; iBYTES_PER_PAGE; i+)/ / DEBUG_uart1_SendByte(rbufi);/ / / / / 写 & 读 页末后面边沿测试/ addr = BYTES_PER_PAGE * 40 + 10;/ if(flash_write_ok(addr, wbuf, sizeof(wbuf)/ / if(flash_write_ok(addr+BYTES_PER_PAGE, wbuf, sizeof(wbuf)/ / debug_flagView(5);/ memset(rbuf, 0, sizeof(rbuf);/ flash_read(addr - 20, rbuf, sizeof(rbuf);/ for(i=0; iBYTES_PER_PAGE; i+)/ / DEBUG_uart1_SendByte(rbufi);/ / / static void test_ok(void)/ 这个函数能正常 写/读; 数据也是对的./ UINT32 i;/ #define BEGIN_ADDR(200*BYTES_PER_PAGE)/ debug_FillFlash(0+BEGIN_ADDR, BEGIN_ADDR + BYTES_PER_PAGE