1、版本: V1.0修改及日期:*/#include string.h#include ./delay.h./uart.h./stc_spi.h#define _DELCALE_IN_THIS_FILE_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) #d
2、efine 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_CS P12 /外部flash SPI使能信号#define Select_Flash() SPI_CS=0#define UnSelect_Flash() SPI_CS=1#define write1
3、Byte(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
4、_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_ReadID 0x9f / 读取芯片32位ID.#define BUFFER_2_WRITE 0x87 / buffer 2 write#define BUFFER_2_READ 0xD3
5、/ D6 buffer 2 read (change to 0xD6 for SPI mode 0,3)/ 纯软件部分 /typedef struct UINT16 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 enum E_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: -*
6、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(); 缓冲区(write buffer)数据与FLASH指定页比较 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 TRUE 不相同 FALSE 相同static UINT8 flash_buffer_compareUnsame(
7、UINT16 page) write1Byte(PAGE_TO_B2_COMP); write1Byte(UINT8)(page 6); write1Byte(UINT8)(page 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
8、_SendString(FFWW0000rn DEBUG_uart1_Sendbuf(UINT8*)&page, sizeof(page);ctl.pageIdWrite, sizeof(ctl.pageIdWrite); Write_Page_From_Buffer(ctl.pageIdWrite); ctl.pageIdWrite = page; while(beginAddr + bytes BYTES_PER_PAGE) / 超出原来的页FFWW1111rnbeginAddr, sizeof(beginAddr);bytes, sizeof(bytes); bytes_will_wri
9、te = 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+; if
10、(bytes != 0)FFWW3333rn DEBUG_uart1_Sendbuf(buf, bytes); Write_Data2FlashBuffer(beginAddr, buf, bytes); return TRUE; UINT16 flash_read(UINT32 addr,UINT8 *savebuf,UINT16 bytes) 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. 实际读成功的字节数.UINT16 flash_read(UINT32 addr,UINT8 *savebuf,UINT16 bytes) UINT16 beginAddr = addr % BYTES_PER
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