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轉(zhuǎn)一個(gè)Mega8 SPI讀寫DataFlash的代碼，測(cè)試好用的 |
| 作者：zlei 欄目：單片機(jī) |
;*************************************************************************** ; ; File NAME :'DFlash.asm" ; Title :SPI interface to Serial DataFlash ; Date :2003.06.01. ; Version :1.0.0 ; SUPPORT telephone :+36-70-333-4034, old: +36-30-9541-658 VFX ; SUPPORT fax : ; SUPPORT Email :info@vfx.hu ; Target MCU :ATMEGA8 ; ;*************************************************************************** ; D E S C R I P T I O N ; ; SPI interface to AT45DBxxx Serial DataFlash ; ; Functions to access the ATMEL AT45Dxxx dataFLASH series ; SUPPORTs 1Mbit - 128Mbit ; ;*************************************************************************** ; M O D I F I C A T I O N H I S T O R Y ; ; ; rev. date who why ; ---- ---------- --- ------------------------------------ ; 0.01 2003.06.01 VFX Creation ; ;*************************************************************************** ;HARDWARE ;*************************************************************************** ;* ;* SYSCLK: f=16.000 MHz (T= 62.5 ns) ;* ;*************************************************************************** ; ; CS - Chip SELECT ; SCK - Serial Clock ; SI - Serial Input ; SO - Serial OUTPUT ; WP - HARDWARE Page Write Protect Pin ; RESET - Chip Reset ; RDY/BUSY - Ready/Busy ; ; To provide optimal flexibility, the MEMORY array of the AT45DB081B is ;divided into three levels of granularity comprising of sectors, blocks, ;and pages. All program operations to the DataFlash occur on a page-by-page ;basis; however, the optional erase operations can be performed at the block ;or page level. ; ; ;The DEVICE operation is controlled by instructions from the host processor. ;The list of instructions and their associated opcodes are contained in ;Tables 1 through 4. A valid instruction starts with the falling edge of CS ;followed by the appropriate 8-bit opcode and the desired buffer or main MEMORY ;address location. While the CS pin is low, tog-gling the SCK pin controls the ;loading of the opcode and the desired buffer or main MEMORY address location ;through the SI (serial input) pin. All instructions, addresses and data are ;transferred with the most significant bit (MSB) first. ;Buffer addressing is referenced in the datasheet using the terminology ;BFA8 - BFA0 to denote the nine address bits required to designate a byte address ;within a buffer. Main MEMORY addressing is referenced using the terminology ;PA11 - PA0 and BA8 - BA0 where PA11 - PA0 denotes the 12 address bits required ;to designate a page address and BA8 - BA0 denotes the nine address bits ;required to designate a byte address within the page. ; ; ;Status Register Format ;Bit 7 6 5 4 3 2 1 0 ; RDY/BUSY COMP 1 0 0 1 X X 45DB161 ;*************************************************************************** ;* Const Def ; ;Look-up table for these sizes -> 512K, 1M, 2M, 4M, 8M, 16M, 32M, 64M ;FLASH unsigned CHAR DF_pagebits[] ={ 9, 9, 9, 9, 9, 10, 10, 11}; //index of internal page address bits ;DataFLASH opcodes .equ MainMemPageRead = 0x52 ;Main MEMORY Page Read Inactive Clk Pol Low or High .equ FlashPageRead = 0x52 ;Main MEMORY page read .equ FlashToBuf1Transfer= 0x53 ;Main MEMORY page to buffer 1 transfer .equ Buf1Read = 0x54 ;Buffer 1 read .equ FlashToBuf2Transfer= 0x55 ;Main MEMORY page to buffer 2 transfer .equ Buf2Read = 0x56 ;Buffer 2 read .equ StatusReg = 0x57 ;Status register .equ StatusRegMode3 = 0xD7 ;Status register read SPI Mode 0 or 3 .equ AutoPageReWrBuf1 = 0x58 ;Auto page rewrite through buffer 1 .equ AutoPageReWrBuf2 = 0x59 ;Auto page rewrite through buffer 2 .equ FlashToBuf1Compare = 0x60 ;Main MEMORY page to buffer 1 compare .equ FlashToBuf2Compare = 0x61 ;Main MEMORY page to buffer 2 compare .equ ContArrayRead = 0x68 ;Continuous Array Read (Note : ONLY A/B-parts supported) .equ FlashProgBuf1 = 0x82 ;Main MEMORY page program through buffer 1 .equ Buf1ToFlashWE = 0x83 ;Buffer 1 to main MEMORY page program with built-in erase .equ Buf1Write = 0x84 ;Buffer 1 write .equ FlashProgBuf2 = 0x85 ;Main MEMORY page program through buffer 2 .equ Buf2ToFlashWE = 0x86 ;Buffer 2 to main MEMORY page program with built-in erase .equ Buf2Write = 0x87 ;Buffer 2 write .equ Buf1ToFlash = 0x88 ;Buffer 1 to main MEMORY page program without built-in erase .equ Buf2ToFlash = 0x89 ;Buffer 2 to main MEMORY page program without built-in erase .equ MainMemPageReadSPI = 0xD2 ;Main MEMORY Page Read SPI Mode 0 or 3 .equ ContArrayReadSPI = 0xE8 ;Continuous Array Read SPI Mode 0 or 3 ;Table 2. Program and Erase Commands .equ Buffer1Write = 0x84 ;Buffer 1 Write .equ Buffer2Write = |
| 2樓： | >>參與討論 |
| 作者： hujiahua 于 2005/8/23 14:42:00 發(fā)布：
DataFlash 是不是 MULTI Media Card? |
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| 3樓： | >>參與討論 |
| 作者： lizy927 于 2005/8/23 15:37:00 發(fā)布：
大哥 怎么搞個(gè)匯編的過(guò)來(lái)呀 |
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| 4樓： | >>參與討論 |
| 作者： zlei 于 2005/8/23 17:21:00 發(fā)布：
要c的嗎？咬咬牙把移植測(cè)試好的C代碼貼出來(lái)了 //來(lái)自 ATMEL.html">ATMEL 已經(jīng)移植gcc了 //CPU MEGA16L @7.3728MHZ //***************************************************************************** // // COPYRIGHT (c) ATMEL Norway, 1996-2001 // // The COPYRIGHT to the document(s) herein is the property of // ATMEL Norway, Norway. // // The document(s) may be used and/or copied ONLY with the written // permission from ATMEL Norway or in accordance with the terms and // conditions stipulated in the agreement/contract under which the // document(s) have been supplied. // //***************************************************************************** // // File........: DATAFLASH.C // // Author(s)...: ATMEL Norway // // Target(s)...: All AVRs with built-in HW SPI // // DESCRIPTION.: Functions to access the ATMEL AT45Dxxx dataFLASH series // SupPORTs 512Kbit - 64Mbit // // Revisions...: // // YYYYMMDD - VER. - COMMENT - SIGN. // // 20011017 - 1.00 - Beta release - RM // 20011017 - 0.10 - Generated file - RM // 20050403 PORT to avr-gcc/avr-libc - zlei // //***************************************************************************** // Includes #include <avr/io.h> #include <inttypes.h> #include <avr/pgmspace.h> #include "dataFLASH.h" // Constants //Look-up table for these sizes -> 512K, 1M, 2M, 4M, 8M, 16M, 32M, 64M const uint8_t DF_pagebits[] PROGMEM ={ 9, 9, 9, 9, 9, 10, 10, 11}; //index of internal page address bits //Look-up table for these sizes -> 512K, 1M, 2M, 4M, 8M, 16M, 32M, 64M const uint16_t DF_pagesize[] PROGMEM ={264,264, 264, 264, 264, 528, 528,1056}; //index of pagesizes // Globals unsigned CHAR PageBits = 0; unsigned int PageSize = 0; // Functions /***************************************************************************** * * Function NAME : DF_SPI_init * * Returns : None * * Parameters : None * * Purpose : Sets up the HW SPI in MASTER mode, Mode 3 * Note -> Uses the SS LINE to CONTROL the DF CS-LINE. * ******************************************************************************/ void DF_SPI_init (void) { PORTB |= (1<<PB4) | (1<<PB5) | (1<<PB6) | (1<<PB7); DDRB |= (1<<DDB5) | (1<<DDB7) | (1<<DDB4); //Set MOSI, SCK AND SS as OUTPUTs SPSR = (1<<SPI2X); //SPI double speed settings SPCR = (1<<SPE) | (1<<MSTR) | (1<<CPHA) | (1<<CPOL); //Enable SPI in MASTER mode, mode 3, Fosc/4 } /***************************************************************************** * * Function NAME : DF_SPI_RW * * Returns : Byte read from SPI data register (any VALUE) * * Parameters : Byte to be written to SPI data register (any VALUE) * * Purpose : Read and writes one byte from/to SPI MASTER * ******************************************************************************/ unsigned CHAR DF_SPI_RW (unsigned CHAR OUTPUT) { unsigned CHAR input; SPDR = OUTPUT; //put byte 'OUTPUT' in SPI data register while(!(SPSR & 0x80)); //wait for transfer complete, poll SPIF-flag input = SPDR; //read VALUE in SPI data reg. return input; //return the byte clocked in from SPI slave } /***************************************************************************** * * Function NAME : Read_DF_status * * Returns : One status byte. Consult DataFLASH datasheet for further * decoding info * * Parameters : None * * Purpose : Status info concerning the DataFLASH is busy or not. * Status info concerning compare between buffer and FLASH page * Status info concerning size of actual DEVICE * ******************************************************************************/ unsigned CHAR Read_DF_status (void) { unsigned CHAR result,index_copy; DF_CS_DISABLE; |
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| 5樓： | >>參與討論 |
| 作者： zlei 于 2005/8/23 17:23:00 發(fā)布：
頭文件和測(cè)試代碼 #ifndef __DATAFLASH_INCLUDED #define __DATAFLASH_INCLUDED //General macro definitions //changed to *DF for avr-libc future compatiblity #define sbiDF(PORT,bit) (PORT |= (1<<bit)) #define cbiDF(PORT,bit) (PORT &= ~(1<<bit)) #define SetBit(x,y) (x |= (y)) #define ClrBit(x,y) (x &=~(y)) #define ChkBit(x,y) (x & (y)) //DataFLASH opcodes #define FlashPageRead 0x52 // Main MEMORY page read #define FlashToBuf1Transfer 0x53 // Main MEMORY page to buffer 1 transfer #define Buf1Read 0x54 // Buffer 1 read #define FlashToBuf2Transfer 0x55 // Main MEMORY page to buffer 2 transfer #define Buf2Read 0x56 // Buffer 2 read #define StatusReg 0x57 // Status register #define AutoPageReWrBuf1 0x58 // Auto page rewrite through buffer 1 #define AutoPageReWrBuf2 0x59 // Auto page rewrite through buffer 2 #define FlashToBuf1Compare 0x60 // Main MEMORY page to buffer 1 compare #define FlashToBuf2Compare 0x61 // Main MEMORY page to buffer 2 compare #define ContArrayRead 0x68 // Continuous Array Read (Note : ONLY A/B-parts supPORTed) #define FlashProgBuf1 0x82 // Main MEMORY page program through buffer 1 #define Buf1ToFlashWE 0x83 // Buffer 1 to main MEMORY page program with built-in erase #define Buf1Write 0x84 // Buffer 1 write #define FlashProgBuf2 0x85 // Main MEMORY page program through buffer 2 #define Buf2ToFlashWE 0x86 // Buffer 2 to main MEMORY page program with built-in erase #define Buf2Write 0x87 // Buffer 2 write #define Buf1ToFlash 0x88 // Buffer 1 to main MEMORY page program without built-in erase #define Buf2ToFlash 0x89 // Buffer 2 to main MEMORY page program without built-in erase #define PageErase 0x81 // Page erase, added by Martin THOMAS //Pin definitions for interface to the DataFLASH //DataFLASH macro definitions //PB4(SS#) for dataFLASH CS# #define DF_CS_ENABLE cbiDF(PORTB,4) #define DF_CS_DISABLE sbiDF(PORTB,4) //PB1 for dataFLASH WP# #define DF_WP_PIN 1 #define DF_WP_ON sbiDF(PORTB,DF_WP_PIN) #define DF_WP_OFF sbiDF(PORTB,DF_WP_PIN) //Function definitions void DF_SPI_init (void); unsigned CHAR DF_SPI_RW (unsigned CHAR OUTPUT); unsigned CHAR Read_DF_status (void); void Page_To_Buffer (unsigned int PageAdr, unsigned CHAR BufferNo); unsigned CHAR Buffer_Read_Byte (unsigned CHAR BufferNo, unsigned int IntPageAdr); void Buffer_Read_Str (unsigned CHAR BufferNo, unsigned int IntPageAdr, unsigned int No_of_bytes, unsigned CHAR *BufferPtr); void Buffer_Write_Enable (unsigned CHAR BufferNo, unsigned int IntPageAdr); void Buffer_Write_Byte (unsigned CHAR BufferNo, unsigned int IntPageAdr, unsigned CHAR Data); void Buffer_Write_Str (unsigned CHAR BufferNo, unsigned int IntPageAdr, unsigned int No_of_bytes, unsigned CHAR *BufferPtr); void Buffer_To_Page (unsigned CHAR BufferNo, unsigned int PageAdr); void Cont_Flash_Read_Enable (unsigned int PageAdr, unsigned int IntPageAdr); //Function definitions 2,use macro to replace above function NAME for using #define dfSpiInit DF_SPI_init #define dfSpiRW DF_SPI_RW #define dfReadStatus Read_DF_status #define dfPageToBuffer Page_To_Buffer #define dfBufferReadByte Buffer_Read_Byte #define dfBufferReadStr Buffer_Read_Str #define dfBufferWriteEnable Buffer_Write_Enable #define dfBufferWriteByte Buffer_Write_Byte #define dfBufferWriteStr Buffer_Write_Str #define dfBufferToPage Buffer_To_Page #define dfContFlashReadEnable Cont_Flash_Read_Enable // *****************************[ End Of DATAFLASH.H ]***************************** void AT45Test(void) { u08 i=0; //--------------- rprintf("Start AT45 data FLASH TEST !\n\r"); i=dfReadStatus(); writeSeg7(i); rprintf("\n\r1. Read DF Status : %x \n\r",i); dfPageToBuffer(1,1); rprintf("\n\r2. Transfers Page 1 To Buffer 1 \n\r"); timerPause(100); i=dfBufferReadByte(1,0x10) |
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