flashat45db161d驅動模塊源碼C

1、聲明 : 希望使用者保留本人的相關信息,當然了 ,要面試時用除外,呵呵/*模塊注釋*模塊名 :模塊功能:E:_ldr_my_prjSW_PRJSRCEX_DEV_DRVat45db161d.c提供操作flash:AT45DB161D的必要的接口 , 簡單明了 .存在問題 :1)如果突然斷電, 很可能要會丟掉1page 數(shù)據(jù) ,原來的模塊也存在這樣的問題,電腦 windows 系統(tǒng)也有 .2) 沒有考慮壞頁的問題 .把 flash 的兩個 ram 分別用作 wbuf 和 rbuf.全局設定 :全局依賴 :與 flash芯片通信的驅動模塊編程語言 :ANSI C作者及日期 :練達榮2015/06/

2、18版本 :V1.0修改及日期 :*/#include <STC15F2K60S2.H>#include <string.h>#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_uart

3、1_Sendbuf(buffer,bytes16)uart1_Sendbuf(buffer,bytes16)#define DEBUG_uart1_SendString(str)#define DEBUG_uart1_SendByte(dat8)#else#define DEBUG_uart1_Sendbuf(buffer,bytes16)#define DEBUG_uart1_SendString(str)#define DEBUG_uart1_SendByte(dat8)#endifuart1_SendString(str)uart1_SendByte(dat8)/移植相關/#define

4、 SPI_CSP12 /外部 flash SPI使能信號#define Select_Flash()SPI_CS=0#define UnSelect_Flash()SPI_CS=1#define write1Byte(x)spi_WriteRead1Byte(x)#define read1Byte()spi_WriteRead1Byte(0)/FLASH操作命令/#define PAGE_TO_B1_XFER0x53/mainmemory pagetobuffer 1 transfer#define PAGE_TO_B2_XFER0x55/mainmemory pagetobuffer 2 t

5、ransfer#define PAGE_TO_B2_COMP0x61/ main memorypage compareto buffer 2#define B2_TO_PAGE_WITH_ERASE0x86/ buffer 2 to main memorypage program with built-in erase#define STATUS_REGISTER0xD7#define BUFFER_1_READ0xD1 / D4 buffer 1 read (changeto 0xD4 for SPI mode 0,3)#define FLASH_CMD_ReadID0x9f/ 讀取芯片32

6、 位 ID.#define BUFFER_2_WRITE0x87/ buffer 2 write#define BUFFER_2_READ0xD3 / D6 buffer 2 read (changeto 0xD6 for SPI mode 0,3)/純軟件部分/typedef structUINT16 pageIdRead;/ 04095UINT16 pageIdWrite; / 04095T_FlashCtrl;static T_FlashCtrl ctl;當前讀的頁地址當前寫的頁地址typedef enumE_ReadBuffer,E_WriteBufferET_BufReadWrite

7、;/* Function:檢測并等待器件忙狀態(tài)* Description:過讀狀態(tài)寄存器來檢測忙狀態(tài)* Calls:-* Input:-* Output:-* Return:*/static void FLASH_Wait_Busy(void)Select_Flash(); write1Byte(STATUS_REGISTER); while(1)if(read1Byte() & 0x80) /讀取的最高位1 時器件忙break;UnSelect_Flash();/* Function:緩沖區(qū) (write buffer)數(shù)據(jù)與 FLASH指定頁比較* Description:狀態(tài)寄存

8、器 bit 6 為 0 表示比較數(shù)據(jù)想匹配， 1 表示比較數(shù)據(jù)不相匹配* Calls:-* Input:-* Output:TRUE不相同F(xiàn)ALSE相同* Return:*/static UINT8 flash_buffer_compareUnsame(UINT16 page)Select_Flash();write1Byte(PAGE_TO_B2_COMP);write1Byte(UINT8)(page >> 6);write1Byte(UINT8)(page << 2);write1Byte(0x00);UnSelect_Flash();FLASH_Wait_Bus

9、y();Select_Flash();write1Byte(STATUS_REGISTER);if(read1Byte() & 0x40)/讀取的比較狀態(tài)位UnSelect_Flash();return 1;elseUnSelect_Flash();return 0;/*原型 :功能 :從 flash里讀給定 page 的數(shù)據(jù)到 flash的內部 ram.入參 :uint pageflash 的頁 ,0 4095ET_BufReadWrite bufferType出參 :運行環(huán)境 :調用說明 :作者 :練達榮2015/06/18*/static void Load_Page_To_Bu

10、ffer(UINT16 page, ET_BufReadWrite bufferType)Select_Flash();write1Byte(bufferType = E_ReadBuffer ? PAGE_TO_B1_XFER : PAGE_TO_B2_XFER); write1Byte(UINT8)(page >> 6);write1Byte(UINT8)(page << 2);write1Byte(0x00);UnSelect_Flash();FLASH_Wait_Busy();/* Function:將 " 寫緩沖區(qū)內容 "寫入到主存儲器中指

11、定頁* Description:* Calls:-* Input:-頁地址，緩沖區(qū)* Output:-* Return:*/static void Write_Page_From_Buffer(UINT16 page)Select_Flash();write1Byte(B2_TO_PAGE_WITH_ERASE);write1Byte(UINT8)(page >> 6);write1Byte(UINT8)(page << 2);write1Byte(0x00); / don't careUnSelect_Flash();FLASH_Wait_Busy();/*

12、Function:從讀緩沖區(qū)讀數(shù)據(jù)(BUFFER1)，讀出字節(jié)可選* Description:* Calls:-* Input:-頁內字節(jié)地址，緩沖接收數(shù)組，讀數(shù)據(jù)長度* Output:-* Return:*/static void Read_DataFromFlashBuffer(uint addr, UINT8 *dat, UINT16 bytes)uint i;Select_Flash();write1Byte(BUFFER_1_READ);write1Byte(0x00);write1Byte(UINT8)(addr >> 8);write1Byte(UINT8)addr)

13、;for(i = 0; i < bytes; i+)dati = read1Byte();UnSelect_Flash();/* * Function:從讀緩沖區(qū)讀數(shù)據(jù)(BUFFER1)，讀出字節(jié)可選* Description:* Calls:-* Input:-頁內字節(jié)地址，緩沖接收數(shù)組，讀數(shù)據(jù)長度* Output:-* Return:*/static void Read_DataFromWriteBuffer(uint addr, UINT8 *dat, UINT16 bytes)uint i;Select_Flash();write1Byte(BUFFER_2_READ);writ

14、e1Byte(0x00);write1Byte(UINT8)(addr >> 8);write1Byte(UINT8)addr);for(i = 0; i < bytes; i+)dati = read1Byte();UnSelect_Flash();/* Function:將數(shù)據(jù)寫入寫緩沖區(qū)(BUFFER2)，寫入字節(jié)可選* Description:；* Calls:-* Input:-頁內字節(jié)地址，緩沖發(fā)送數(shù)組，寫讀數(shù)據(jù)長度* Output:-* Return:*/static void Write_Data2FlashBuffer(uint addr, UINT8 *d

15、at, UINT16 bytes)uint i;Select_Flash();write1Byte(BUFFER_2_WRITE);write1Byte(0x00);write1Byte(UINT8)(addr >> 8);write1Byte(UINT8)addr);for(i = 0; i < bytes; i+)write1Byte(dati);UnSelect_Flash();/以下是全局函數(shù)/void flash_init(void)memset(&ctl, 0, sizeof(ctl);Load_Page_To_Buffer(ctl.pageIdWrite

16、, E_WriteBuffer);Load_Page_To_Buffer(ctl.pageIdRead, E_ReadBuffer);/*原型 :BOOL flash_write_ok(UINT32 addr,UINT8 *buf,UINT16 bytes)功能 :把數(shù)據(jù)寫到 flash的絕對地址中 ,可能只是寫到其 buf里面 .約定 : 任何時候的 ctl.pageIdWrite所對應的頁都會被讀到相應write buf 里 , 并且只可能比 flash里新 .入參 :UINT32 addrflash 的絕對字節(jié)地址 (0 2MByte,每個 page 最后 16字節(jié)不要 , 但認為是連續(xù)

17、的2MBytes)UINT8 *buf等待保存的數(shù)據(jù)UINT16 bytes要保存數(shù)據(jù)字節(jié)數(shù)出參 :TRUE寫成功FALSE寫失敗 , 地址越界運行環(huán)境 :調用說明 :作者 :練達榮2015/06/18*/ BOOL flash_write_ok(UINT32 addr,UINT8 *buf,UINT16 bytes) UINT16 page = addr/BYTES_PER_PAGE;UINT16 beginAddr = addr % BYTES_PER_PAGE;UINT8 bytes_will_write;if(addr >= FLASH_TOTAL_BYTES | addr +

18、bytes > FLASH_TOTAL_BYTES) FALSE;returnDEBUG_uart1_SendString("FFWWBBBBrn");if(page != ctl.pageIdWrite) /寫的不是當前頁, 先保存當前頁到flash.DEBUG_uart1_SendString("FFWW0000rn");DEBUG_uart1_Sendbuf(UINT8*)&page, sizeof(page);DEBUG_uart1_Sendbuf(UINT8*)&ctl.pageIdWrite, sizeof(ctl.pa

19、geIdWrite); Write_Page_From_Buffer(ctl.pageIdWrite); ctl.pageIdWrite = page;Load_Page_To_Buffer(ctl.pageIdWrite, E_WriteBuffer);while(beginAddr + bytes > BYTES_PER_PAGE)/超出原來的頁DEBUG_uart1_SendString("FFWW1111rn");DEBUG_uart1_Sendbuf(UINT8*)&beginAddr, sizeof(beginAddr);DEBUG_uart1_S

20、endbuf(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("FFWW2222r

21、n");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(beginAd

22、dr);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 :從 flash的絕對地址中 ,讀出特定的字節(jié)數(shù) , 可能只是讀 read buffer ,也可能兩個都讀 .約定 : 任何時候的 ctl.pageIdWrite所對應的頁

23、都會被讀到相應write buf里 , 并且只可能比 flash里新 .入參 :UINT32 addrflash的絕對字節(jié)地址 (0 2MByte,每個 page 最后 16字節(jié)不要 , 但認為是連續(xù)的 2MBytes)UINT8 *buf等待保存的數(shù)據(jù)UINT16 bytes要保存數(shù)據(jù)字節(jié)數(shù)出參 :實際讀成功的字節(jié)數(shù) .運行環(huán)境 :調用說明 :作者 :練達榮2015/06/18*/UINT16 flash_read(UINT32 addr,UINT8 *savebuf,UINT16 bytes)UINT16 page = addr/BYTES_PER_PAGE;UINT16 beginAdd

24、r = addr % BYTES_PER_PAGE;UINT16 bytes_will_read;UINT16 rbytes_true;if(addr >= FLASH_TOTAL_BYTES) if(addr + bytes > FLASH_TOTAL_BYTES) rbytes_true = bytes;return 0;bytes = FLASH_TOTAL_BYTES - addr;DEBUG_uart1_SendString("FFRR0000rn");DEBUG_uart1_Sendbuf(UINT8*)&addr, sizeof(addr)

25、;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)能要重新load./讀的數(shù)據(jù)不在當前讀buf頁 , 可DEBUG_uart1_SendString("FFRR1111rn");DEBUG_uart1_Sendbuf(UINT8*)&ct

26、l.pageIdRead, sizeof(ctl.pageIdRead); DEBUG_uart1_Sendbuf(UINT8*)&ctl.pageIdWrite, sizeof(ctl.pageIdWrite);if(page = ctl.pageIdWrite)/與當前寫的頁相同,看數(shù)據(jù)是否有更新 .if(flash_buffer_compareUnsame(ctl.pageIdWrite)Write_Page_From_Buffer(ctl.pageIdWrite);Load_Page_To_Buffer(page, E_ReadBuffer);/讀的數(shù)據(jù)不在當前頁 .ctl.p

27、ageIdRead = page;while(beginAddr + bytes > BYTES_PER_PAGE)/超出原來的頁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*

28、)&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

29、_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(

30、beginAddr);return rbytes_true;/*原型 :功能 :入參 :讀取 flashUINT8 *buf芯片ID,長度為 4 字節(jié) , 可以用作軟件加密用途保存讀出的設備ID.出參 :無運行環(huán)境:調用說明作者 :練達榮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()

31、;/模塊測試部分/#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 deb

32、ug_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; i<BYTES_P

33、ER_PAGE; i+)/ / wbufi = i % 256;/ < 256?0x5A:0xA5;/ / read id/ flash_read_deviceID(rbuf);/ for(i=0; i<4; i+)/ / DEBUG_uart1_SendByte(rbufi);/ /寫&讀整頁/ addr = BYTES_PER_PAGE * 200;/ if(flash_write_ok(addr, wbuf, sizeof(wbuf)/ / if(flash_write_ok(addr+BYTES_PER_PAGE, wbuf, sizeof(wbuf)/ /debu

34、g_flagView(1);/memset(rbuf, 0, sizeof(rbuf);/flash_read(addr, rbuf, sizeof(rbuf);/DEBUG_uart1_Sendbuf(rbuf,sizeof(rbuf);/ / /寫& 讀跨頁測試/ 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_f

35、lagView(2);/memset(rbuf, 0, sizeof(rbuf);/flash_read(addr - 5, rbuf, sizeof(rbuf);/for(i=0; i<BYTES_PER_PAGE; i+)/DEBUG_uart1_SendByte(rbufi);/ / /寫 & 讀 頁末前面邊沿測試/ addr = BYTES_PER_PAGE * 30 - 10;/ if(flash_write_ok(addr, wbuf, sizeof(wbuf)/ / if(flash_write_ok(addr+BYTES_PER_PAGE, wbuf, sizeo

36、f(wbuf)/ /debug_flagView(4);/memset(rbuf, 0, sizeof(rbuf);/flash_read(addr - 20, rbuf, sizeof(rbuf);/for(i=0; i<BYTES_PER_PAGE; i+)/DEBUG_uart1_SendByte(rbufi);/ / /寫 & 讀 頁末后面邊沿測試/ 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, sizeo