199 lines
6.2 KiB
C
199 lines
6.2 KiB
C
/********************* (C) COPYRIGHT 2015 e-Design Co.,Ltd. ********************
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File Name : EXT_Flash.c
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Version : S100 APP Ver 2.11
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Description:
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Author : bure
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Data:
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History:
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*******************************************************************************/
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#include <string.h>
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#include <stdio.h>
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#include "Ext_Flash.h"
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#include "BIOS.h"
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#define OK 0 // 操作完成
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#define SEC_ERR 1 // 扇区读写错误
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#define TMAX 100000 // 超时限制
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u32 Mass_Memory_Size;
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u32 Mass_Block_Size;
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u32 Mass_Block_Count;
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u32 Tout;
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u8 flash_mode;
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void ExtFLASH_SectorErase(u32 SectorAddr);
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/*******************************************************************************
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SPI_FLASH_SectorErase : Sector Erases the specified FLASH Page.(4k/sector)
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*******************************************************************************/
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void ExtFLASH_SectorErase(u32 SectorAddr)
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{
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ExtFlash_WriteEnable();
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ExtFlash_CS_LOW();
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ExtFlash_SendByte(SE);
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ExtFlash_SendByte((SectorAddr & 0xFF0000) >> 16); //Send high address byte
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ExtFlash_SendByte((SectorAddr & 0xFF00) >> 8); //Send medium address byte
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ExtFlash_SendByte(SectorAddr & 0xFF); //Send low address byte
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ExtFlash_CS_HIGH();
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ExtFlash_WaitForWriteEnd(); // Wait the end of Flash writing
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}
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void ExtFlash_PageWR(u8* pBuffer, u32 WriteAddr)
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{
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u32 addr,i,j;
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u8* ptr;
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u8 page=0,flag=0,write_mode;
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u8 buffer[256];
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flag=0;
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if(flash_mode==FLASH_8M) {
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addr=WriteAddr & 0xFFF000;
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page=16;
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} else {
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page=1;
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addr=WriteAddr & 0xFFFF00;
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}
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while(page>0) {
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ExtFlash_PageRD((u8*)&buffer,addr, 256);
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for(j=0; j<255; j++) {
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if(buffer[j++]!=0xff) {
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flag=1;
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break;
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}
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}
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addr+=256;
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page--;
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}
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if(flash_mode==FLASH_8M) {
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page=16;
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addr=WriteAddr & 0xFFF000;
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if(flag==1)ExtFLASH_SectorErase(addr);
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write_mode=PP;
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} else {
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page=1;
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addr=WriteAddr & 0xFFFF00;
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if(flag==1)write_mode=PW;
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else write_mode=PP;
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}
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ptr=pBuffer;
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for(i=0; i<page; i++) {
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ExtFlash_PageProg(ptr, addr,write_mode);
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addr+=256;
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ptr+=256;
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}
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}
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/*******************************************************************************
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写FLASH页(256 Bytes)： Mode=0: 从0变1数据改写 Mode=1: 数据重写
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*******************************************************************************/
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void ExtFlash_PageProg(u8* pBuffer, u32 WriteAddr,u8 CMD)
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{
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u16 Lenght = 256;
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ExtFlash_CS_HIGH();
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ExtFlash_WaitForWriteEnd();
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ExtFlash_WriteEnable();
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ExtFlash_CS_LOW();
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ExtFlash_SendByte(CMD);
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ExtFlash_SendByte((WriteAddr & 0xFF0000) >> 16);
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ExtFlash_SendByte((WriteAddr & 0xFF00) >> 8);
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ExtFlash_SendByte(WriteAddr & 0xFF);
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while(Lenght--) { // while there is data to be written on the FLASH
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ExtFlash_SendByte((*pBuffer));
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pBuffer++;
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}
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ExtFlash_CS_HIGH();
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ExtFlash_WaitForWriteEnd();
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}
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/*******************************************************************************
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SPI_FLASH_BufferRead
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*******************************************************************************/
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void ExtFlash_PageRD(u8* pBuffer, u32 ReadAddr, u16 Lenght)
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{
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ExtFlash_CS_HIGH();
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ExtFlash_WaitForWriteEnd();
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ExtFlash_CS_LOW();
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ExtFlash_SendByte(READ);
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ExtFlash_SendByte((ReadAddr & 0xFF0000) >> 16);
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ExtFlash_SendByte((ReadAddr& 0xFF00) >> 8);
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ExtFlash_SendByte(ReadAddr & 0xFF);
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while(Lenght--) { // while there is data to be read
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*pBuffer = (ExtFlash_SendByte(Dummy_Byte));
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pBuffer++;
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}
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ExtFlash_CS_HIGH();
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}
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/*******************************************************************************
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SPI_FLASH_ReadByte
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*******************************************************************************/
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u8 ExtFlash_ReadByte(void)
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{
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return (ExtFlash_SendByte(Dummy_Byte));
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}
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/*******************************************************************************
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SPI_FLASH_SendByte
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*******************************************************************************/
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u8 ExtFlash_SendByte(u8 byte)
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{
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Tout = 0;
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while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE) == RESET) {
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if(Tout++ > TMAX) return 255;
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}
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SPI_I2S_SendData(SPI3, byte);
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Tout = 0;
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while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET) {
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if(Tout++ > TMAX) return 255;
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}
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return SPI_I2S_ReceiveData(SPI3);
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}
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/*******************************************************************************
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SPI_FLASH_WriteEnable
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*******************************************************************************/
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void ExtFlash_WriteEnable(void)
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{
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ExtFlash_CS_LOW();
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ExtFlash_SendByte(WREN);
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ExtFlash_CS_HIGH();
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}
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/*******************************************************************************
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SPI_FLASH_WaitForWriteEnd
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*******************************************************************************/
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void ExtFlash_WaitForWriteEnd(void)
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{
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u8 FLASH_Status = 0;
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ExtFlash_CS_LOW();
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ExtFlash_SendByte(RDSR);
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Tout = 0;
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do {
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FLASH_Status = ExtFlash_SendByte(Dummy_Byte);
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if(Tout++ > TMAX) return;
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} while((FLASH_Status & WIP_Flag) == SET); // Write in progress
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ExtFlash_CS_HIGH();
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}
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/*******************************************************************************
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MAL_GetStatus
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*******************************************************************************/
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void MAL_GetStatus (void)
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{
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if(flash_mode==FLASH_8M) {
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Mass_Block_Count = 2048; //FLASH_SIZE/FLASH_PAGE_SIZE;
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Mass_Block_Size = 512*8; //FLASH_PAGE_SIZE; 4096
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Mass_Memory_Size = 512*4096*4 ; //FLASH_SIZE; 0x800000;
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} else {
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Mass_Block_Count = 4096; //FLASH_SIZE/FLASH_PAGE_SIZE; 4096
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Mass_Block_Size = 512; //FLASH_PAGE_SIZE;
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Mass_Memory_Size = 512*4096 ; //FLASH_SIZE; 0x200000;
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}
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}
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/********************************* END OF FILE ******************************/
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