mirror of
https://github.com/Ralim/IronOS.git
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removing old files as eclipse builds now
Added #define organisation over mfg logo (no actual build effect though just for neatness) Creating a CubeMX project to match settings for future use More comments and cleaning up
This commit is contained in:
Ben V. Brown
@@ -1,237 +1,283 @@
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/********************* (C) COPYRIGHT 2015 e-Design Co.,Ltd. ********************
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File Name : 2FAT12.c
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Version : S100 APP Ver 2.11
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Description:
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Author : bure & Celery
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Data: 2015/08/03
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History:
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2015/08/03 ͳһ<CDB3><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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*******************************************************************************/
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File Name : 2FAT12.c
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Version : S100 APP Ver 2.11
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Description:
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Author : bure & Celery
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Data: 2015/08/03
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History:
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2015/08/03 ͳһ<CDB3><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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*******************************************************************************/
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#include <string.h>
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#include "FAT12.h"
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#include "Bios.h"
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#define FAT_LEN 0x1800
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#define FAT1_BASE 0x00001000 // FAT1<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>ַ
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#define FAT2_BASE 0x00002800 // FAT2<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>ַ
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#define ROOT_BASE 0x00004000 // <20><>Ŀ¼<C4BF><C2BC>ʼ<EFBFBD><CABC>ַ
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#define FILE_BASE 0x00008000 // <20>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC>ַ
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#define SEC_LEN 0x200 // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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#define FAT1_SEC 0x0C // FAT1<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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#define FAT2_SEC 0x0C // FAT2<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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#define FAT1_BASE 0x00001000 // FAT1
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#define FAT2_BASE 0x00002800 // FAT2
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#define ROOT_BASE 0x00004000 //
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#define FILE_BASE 0x00008000 //
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#define SEC_LEN 0x200 //
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#define FAT1_SEC 0x0C // FAT1
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#define FAT2_SEC 0x0C // FAT2
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#define OK 0 // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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#define SEC_ERR 1 // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><D0B4><EFBFBD><EFBFBD>
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#define FAT_ERR 2 // FAT<41><54><EFBFBD>д<EFBFBD><D0B4><EFBFBD><EFBFBD>
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#define OVER 3 // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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#define NEW 4 // <20><>Ŀ¼<C4BF><C2BC>
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#define END 0xFFF // <20><><EFBFBD>ӽ<EFBFBD><D3BD><EFBFBD>
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#define OW 0 // <20><>д(<28><><EFBFBD>ݴ<EFBFBD>0<EFBFBD><30>1<EFBFBD><31>д)
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#define RW 1 // <20><>д
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#define OK 0 //
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#define SEC_ERR 1 //
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#define FAT_ERR 2 //
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#define OVER 3 //
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#define NEW 4 //
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#define END 0xFFF //
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#define OW 0 //
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#define RW 1 //
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/*******************************************************************************
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӵغź<EFBFBD>
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*******************************************************************************/
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u8 NextCluster(u16* pCluster)
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{
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u16 FatNum;
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u32 Addr = FAT1_BASE +(*pCluster + *pCluster/2);
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Function:
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Description:
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Input:
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*******************************************************************************/
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u8 NextCluster(u16* pCluster) {
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u16 FatNum;
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u32 Addr = FAT1_BASE + (*pCluster + *pCluster / 2);
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*(pCluster+1)= *pCluster; // <20><><EFBFBD><EFBFBD>ǰһ<C7B0><D2BB><EFBFBD>غ<EFBFBD>
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*(pCluster + 1) = *pCluster; // <20><><EFBFBD><EFBFBD>ǰһ<C7B0><D2BB><EFBFBD>غ<EFBFBD>
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// *(pCluster+1)= 0;
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if((*pCluster >= END)||(*pCluster < 2)) return OK;
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if(ReadDiskData((u8*)&FatNum, Addr, 2)!= OK) return SEC_ERR;
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*pCluster = (*pCluster & 1)?(FatNum >>4):(FatNum & 0x0FFF); // ָ<><D6B8><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>غ<EFBFBD>
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return OK;
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if ((*pCluster >= END) || (*pCluster < 2))
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return OK;
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if (ReadDiskData((u8*) &FatNum, Addr, 2) != OK)
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return SEC_ERR;
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*pCluster = (*pCluster & 1) ? (FatNum >> 4) : (FatNum & 0x0FFF); // ָ<><D6B8><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>غ<EFBFBD>
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return OK;
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}
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/*******************************************************************************
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<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(512 Bytes), <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>غ<EFBFBD>
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*******************************************************************************/
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u8 ReadFileSec(u8* pBuffer, u16* pCluster)
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{
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u32 ReadAddr = FILE_BASE + SEC_LEN*(*pCluster-2);
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Function:
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Description:
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Input:
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*******************************************************************************/
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u8 ReadFileSec(u8* pBuffer, u16* pCluster) {
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u32 ReadAddr = FILE_BASE + SEC_LEN * (*pCluster - 2);
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if(ReadDiskData(pBuffer, ReadAddr, 256)!=OK) return SEC_ERR; // <20><>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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pBuffer += 256;
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ReadAddr += 256;
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if(ReadDiskData(pBuffer, ReadAddr, 256)!=OK) return SEC_ERR; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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if(NextCluster(pCluster)!=0) return FAT_ERR; // ȡ<><C8A1>һ<EFBFBD><D2BB><EFBFBD>غ<EFBFBD>
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return OK;
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if (ReadDiskData(pBuffer, ReadAddr, 256) != OK)
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return SEC_ERR; // <20><>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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pBuffer += 256;
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ReadAddr += 256;
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if (ReadDiskData(pBuffer, ReadAddr, 256) != OK)
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return SEC_ERR; // Failed to read the sector
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if (NextCluster(pCluster) != 0)
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return FAT_ERR; // ȡ<><C8A1>һ<EFBFBD><D2BB><EFBFBD>غ<EFBFBD>
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return OK;
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}
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/*******************************************************************************
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д<EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(512 Bytes)<29><><EFBFBD><EFBFBD>д<EFBFBD><D0B4>ǰFAT<41><54><EFBFBD><EFBFBD><EFBFBD>ز<EFBFBD><D8B2>ҵ<EFBFBD><D2B5><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>غ<EFBFBD>
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*******************************************************************************/
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u8 ProgFileSec(u8* pBuffer, u16* pCluster)
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{
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u16 Tmp;
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u32 ProgAddr = FILE_BASE + SEC_LEN*(*pCluster-2);
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Function:
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Description:
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Input:
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*******************************************************************************/
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u8 ProgFileSec(u8* pBuffer, u16* pCluster) {
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u16 Tmp;
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u32 ProgAddr = FILE_BASE + SEC_LEN * (*pCluster - 2);
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if(ProgDiskPage(pBuffer, ProgAddr)!= OK) return SEC_ERR; // дǰ<D0B4><C7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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pBuffer += 256;
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ProgAddr += 256;
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if(ProgDiskPage(pBuffer, ProgAddr)!= OK) return SEC_ERR; // д<><D0B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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Tmp = *pCluster;
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switch(Tmp) {
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case 0: // <20><><EFBFBD>дغ<D0B4>
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case 1: // <20><><EFBFBD>дغ<D0B4>
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if(SeekBlank (pBuffer, pCluster )!= OK) return OVER;
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if(SetCluster(pBuffer, pCluster )!= OK) return SEC_ERR;
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*(pCluster+1) = Tmp;
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return OK;
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case END: // <20><><EFBFBD>ӽ<EFBFBD><D3BD><EFBFBD>
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default :
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if(NextCluster(pCluster)!= OK) return FAT_ERR; // ȡ<><C8A1>һ<EFBFBD><D2BB><EFBFBD>غ<EFBFBD>
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return OK;
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}
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if (ProgDiskPage(pBuffer, ProgAddr) != OK)
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return SEC_ERR; // дǰ<D0B4><C7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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pBuffer += 256;
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ProgAddr += 256;
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if (ProgDiskPage(pBuffer, ProgAddr) != OK)
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return SEC_ERR; // д<><D0B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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Tmp = *pCluster;
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switch (Tmp) {
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case 0: // <20><><EFBFBD>дغ<D0B4>
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case 1: // <20><><EFBFBD>дغ<D0B4>
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if (SeekBlank(pBuffer, pCluster) != OK)
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return OVER;
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if (SetCluster(pBuffer, pCluster) != OK)
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return SEC_ERR;
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*(pCluster + 1) = Tmp;
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return OK;
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case END: // <20><><EFBFBD>ӽ<EFBFBD><D3BD><EFBFBD>
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default:
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if (NextCluster(pCluster) != OK)
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return FAT_ERR; // ȡ<><C8A1>һ<EFBFBD><D2BB><EFBFBD>غ<EFBFBD>
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return OK;
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}
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}
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/*******************************************************************************
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<EFBFBD><EFBFBD><EFBFBD>ҿ<EFBFBD><EFBFBD>дغţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>дغż<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>дغ<EFBFBD>
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*******************************************************************************/
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u8 SeekBlank(u8* pBuffer, u16* pCluster)
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{
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u16 Offset, Tmp, i, n = 0;
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u32 SecAddr;
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Function:
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Description:
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Input:
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*******************************************************************************/
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u8 SeekBlank(u8* pBuffer, u16* pCluster) {
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u16 Offset, Tmp, i, n = 0;
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u32 SecAddr;
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for(i=0; i<4096; i++) {
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Offset = i + i/2;
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if((Offset%256)== 0) {
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SecAddr = FAT1_BASE +(Offset &(~0xFF));
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if(ReadDiskData(pBuffer, SecAddr, 258)!= 0) return SEC_ERR;
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}
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Offset %= 256;
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Tmp = pBuffer[Offset] + (pBuffer[Offset+1] <<8);
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Tmp = (i & 1)?(Tmp >>4):(Tmp & 0xFFF);
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if(Tmp == 0) {
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*pCluster++ = i;
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n++;
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if(n > 1) return OK;
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}
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}
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*(pCluster+1)= 0xFFF;
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return OK;
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for (i = 0; i < 4096; i++) {
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Offset = i + i / 2;
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if ((Offset % 256) == 0) {
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SecAddr = FAT1_BASE + (Offset & (~0xFF));
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if (ReadDiskData(pBuffer, SecAddr, 258) != 0)
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return SEC_ERR;
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}
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Offset %= 256;
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Tmp = pBuffer[Offset] + (pBuffer[Offset + 1] << 8);
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Tmp = (i & 1) ? (Tmp >> 4) : (Tmp & 0xFFF);
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if (Tmp == 0) {
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*pCluster++ = i;
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n++;
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if (n > 1)
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return OK;
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}
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}
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*(pCluster + 1) = 0xFFF;
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return OK;
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}
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/*******************************************************************************
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>غ<EFBFBD>д<EFBFBD><EFBFBD>FAT<EFBFBD><EFBFBD>ǰ<EFBFBD>غ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD>ã<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ǰ<EFBFBD>غ<EFBFBD>Ϊԭ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>غ<EFBFBD>
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*******************************************************************************/
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u8 SetCluster(u8* pBuffer, u16* pCluster)
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{
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u16 Offset, Tmp, i, k;
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u32 SecAddr;
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Function:
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Description:
|
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Input:
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*******************************************************************************/
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u8 SetCluster(u8* pBuffer, u16* pCluster) {
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u16 Offset, Tmp, i, k;
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u32 SecAddr;
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i = *pCluster; // <20><>ȡԭ<C8A1><D4AD>ǰ<EFBFBD>غ<EFBFBD>
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k = *(pCluster+1); // <20><>ȡ<EFBFBD><C8A1>һ<EFBFBD>غ<EFBFBD>
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*pCluster = k;
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Offset = i + i/2;
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SecAddr = FAT1_BASE +(Offset &(~0xFF));
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Tmp = Offset & 0xFF;
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if(ReadDiskData(pBuffer, SecAddr, 256)!= 0) return SEC_ERR;
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if(i & 1) pBuffer[Tmp]=((k<<4)& 0xF0)+(pBuffer[Tmp]& 0x0F);
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else pBuffer[Tmp]= k;
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if(Tmp++ < 256) {
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if(i & 1) pBuffer[Tmp]= k>>4;
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else pBuffer[Tmp]=((k>>8)& 0x0F)+(pBuffer[Tmp]& 0xF0);
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if(ProgDiskPage(pBuffer, SecAddr)!= 0) return SEC_ERR;
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} else {
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if(ProgDiskPage(pBuffer, SecAddr)!= 0) return SEC_ERR;
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SecAddr += 256;
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if(ReadDiskData(pBuffer, SecAddr, 256)!= 0) return SEC_ERR;
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if(i & 1) pBuffer[0]= k>>4;
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else pBuffer[0]=((k>>8)& 0x0F)+(pBuffer[0]& 0xF0);
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if(ProgDiskPage(pBuffer, SecAddr)!= 0) return SEC_ERR;
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}
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return OK;
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i = *pCluster; // <20><>ȡԭ<C8A1><D4AD>ǰ<EFBFBD>غ<EFBFBD>
|
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k = *(pCluster + 1); // <20><>ȡ<EFBFBD><C8A1>һ<EFBFBD>غ<EFBFBD>
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*pCluster = k;
|
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Offset = i + i / 2;
|
||||
SecAddr = FAT1_BASE + (Offset & (~0xFF));
|
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Tmp = Offset & 0xFF;
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if (ReadDiskData(pBuffer, SecAddr, 256) != 0)
|
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return SEC_ERR;
|
||||
if (i & 1)
|
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pBuffer[Tmp] = ((k << 4) & 0xF0) + (pBuffer[Tmp] & 0x0F);
|
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else
|
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pBuffer[Tmp] = k;
|
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if (Tmp++ < 256) {
|
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if (i & 1)
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pBuffer[Tmp] = k >> 4;
|
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else
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pBuffer[Tmp] = ((k >> 8) & 0x0F) + (pBuffer[Tmp] & 0xF0);
|
||||
if (ProgDiskPage(pBuffer, SecAddr) != 0)
|
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return SEC_ERR;
|
||||
} else {
|
||||
if (ProgDiskPage(pBuffer, SecAddr) != 0)
|
||||
return SEC_ERR;
|
||||
SecAddr += 256;
|
||||
if (ReadDiskData(pBuffer, SecAddr, 256) != 0)
|
||||
return SEC_ERR;
|
||||
if (i & 1)
|
||||
pBuffer[0] = k >> 4;
|
||||
else
|
||||
pBuffer[0] = ((k >> 8) & 0x0F) + (pBuffer[0] & 0xF0);
|
||||
if (ProgDiskPage(pBuffer, SecAddr) != 0)
|
||||
return SEC_ERR;
|
||||
}
|
||||
return OK;
|
||||
}
|
||||
/*******************************************************************************
|
||||
Function:
|
||||
Description:
|
||||
Input:
|
||||
*******************************************************************************/
|
||||
u8 FAT_SearchFile(u8* pBuffer, u8* pFileName, u16* pCluster, u32* pDirAddr,
|
||||
u32* flag) {
|
||||
u16 i, n;
|
||||
|
||||
*******************************************************************************/
|
||||
u8 FAT_SearchFile(u8* pBuffer, u8* pFileName, u16* pCluster, u32* pDirAddr,u32* flag)
|
||||
{
|
||||
u16 i, n;
|
||||
|
||||
*pCluster = 0;
|
||||
for(*pDirAddr=ROOT_BASE; *pDirAddr<FILE_BASE; ) {
|
||||
if(ReadDiskData(pBuffer, *pDirAddr, 256)!= OK) return SEC_ERR;
|
||||
for(n=0; n<256; n+=32) {
|
||||
for(i=0; i<4; i++) {
|
||||
if(pBuffer[n + i]!= 0) {
|
||||
if(pBuffer[n + i]!= pFileName[i]) break;
|
||||
if(i == 3) { // <20>ҵ<EFBFBD><D2B5>ļ<EFBFBD><C4BC><EFBFBD>
|
||||
*pCluster = *(u16*)(pBuffer + n + 0x1A); // <20>ļ<EFBFBD><C4BC><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>غ<EFBFBD>
|
||||
return OK;
|
||||
}
|
||||
} else return NEW; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>հ<EFBFBD>Ŀ¼<C4BF><C2BC><EFBFBD>
|
||||
}
|
||||
*pDirAddr += 32;
|
||||
}
|
||||
}
|
||||
return OVER;
|
||||
*pCluster = 0;
|
||||
for (*pDirAddr = ROOT_BASE; *pDirAddr < FILE_BASE;) {
|
||||
if (ReadDiskData(pBuffer, *pDirAddr, 256) != OK)
|
||||
return SEC_ERR;
|
||||
for (n = 0; n < 256; n += 32) {
|
||||
for (i = 0; i < 4; i++) {
|
||||
if (pBuffer[n + i] != 0) {
|
||||
if (pBuffer[n + i] != pFileName[i])
|
||||
break;
|
||||
if (i == 3) { // <20>ҵ<EFBFBD><D2B5>ļ<EFBFBD><C4BC><EFBFBD>
|
||||
*pCluster = *(u16*) (pBuffer + n + 0x1A); // <20>ļ<EFBFBD><C4BC><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>غ<EFBFBD>
|
||||
return OK;
|
||||
}
|
||||
} else
|
||||
return NEW; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>հ<EFBFBD>Ŀ¼<C4BF><C2BC><EFBFBD>
|
||||
}
|
||||
*pDirAddr += 32;
|
||||
}
|
||||
}
|
||||
return OVER;
|
||||
}
|
||||
|
||||
/*******************************************************************************
|
||||
<EFBFBD><EFBFBD>ģʽ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>غż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD> 0<>غż<D8BA><C5BC><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>հ<EFBFBD>Ŀ¼<C4BF><C2BC><EFBFBD>ַ
|
||||
*******************************************************************************/
|
||||
u8 OpenFileRd(u8* pBuffer, u8* pFileName, u16* pCluster, u32* pDirAddr)
|
||||
{
|
||||
u16 i, n;
|
||||
Function:OpenFileRd
|
||||
Description: Opens a file for reading from
|
||||
Input:
|
||||
*******************************************************************************/
|
||||
u8 OpenFileRd(u8* pBuffer, u8* pFileName, u16* pCluster, u32* pDirAddr) {
|
||||
u16 i, n;
|
||||
|
||||
*pCluster = 0;
|
||||
for(*pDirAddr=ROOT_BASE; *pDirAddr<FILE_BASE; ) {
|
||||
if(ReadDiskData(pBuffer, *pDirAddr, 256)!= OK) return SEC_ERR;
|
||||
for(n=0; n<256; n+=32) {
|
||||
for(i=0; i<11; i++) {
|
||||
if(pBuffer[n + i]!= 0) {
|
||||
if(pBuffer[n + i]!= pFileName[i]) break;
|
||||
if(i == 10) { // <20>ҵ<EFBFBD><D2B5>ļ<EFBFBD><C4BC><EFBFBD>
|
||||
*pCluster = *(u16*)(pBuffer + n + 0x1A); // <20>ļ<EFBFBD><C4BC><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>غ<EFBFBD>
|
||||
return OK;
|
||||
}
|
||||
} else return NEW; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>հ<EFBFBD>Ŀ¼<C4BF><C2BC><EFBFBD>
|
||||
}
|
||||
*pDirAddr += 32;
|
||||
}
|
||||
}
|
||||
return OVER;
|
||||
*pCluster = 0;
|
||||
for (*pDirAddr = ROOT_BASE; *pDirAddr < FILE_BASE;) {
|
||||
if (ReadDiskData(pBuffer, *pDirAddr, 256) != OK)
|
||||
return SEC_ERR;
|
||||
for (n = 0; n < 256; n += 32) {
|
||||
for (i = 0; i < 11; i++) {
|
||||
if (pBuffer[n + i] != 0) {
|
||||
if (pBuffer[n + i] != pFileName[i])
|
||||
break;
|
||||
if (i == 10) { // <20>ҵ<EFBFBD><D2B5>ļ<EFBFBD><C4BC><EFBFBD>
|
||||
*pCluster = *(u16*) (pBuffer + n + 0x1A); // <20>ļ<EFBFBD><C4BC><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>غ<EFBFBD>
|
||||
return OK;
|
||||
}
|
||||
} else
|
||||
return NEW; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>հ<EFBFBD>Ŀ¼<C4BF><C2BC><EFBFBD>
|
||||
}
|
||||
*pDirAddr += 32;
|
||||
}
|
||||
}
|
||||
return OVER;
|
||||
}
|
||||
/*******************************************************************************
|
||||
дģʽ<EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>غż<EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD>ַ
|
||||
*******************************************************************************/
|
||||
u8 OpenFileWr(u8* pBuffer, u8* pFileName, u16* pCluster, u32* pDirAddr)
|
||||
{
|
||||
u16 i, n;
|
||||
Function: OpenFileWr
|
||||
Description: Opens a file for writing to
|
||||
Input:
|
||||
*******************************************************************************/
|
||||
u8 OpenFileWr(u8* pBuffer, u8* pFileName, u16* pCluster, u32* pDirAddr) {
|
||||
u16 i, n;
|
||||
|
||||
i = OpenFileRd(pBuffer, pFileName, pCluster, pDirAddr);
|
||||
if(i != NEW) return i;
|
||||
else { // <20><>ǰ<EFBFBD><C7B0>Ϊ<EFBFBD>հ<EFBFBD>Ŀ¼<C4BF><C2BC>
|
||||
if(SeekBlank(pBuffer, pCluster)!= OK) return OVER; // <20><>FAT<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||||
n =*pDirAddr & 0xFF; // nΪ<6E><CEAA>ǰҳĿ¼<C4BF><C2BC>
|
||||
if(ReadDiskData(pBuffer,(*pDirAddr)-n, 256)!= OK) return SEC_ERR;
|
||||
for(i=0; i<11; i++) pBuffer[n + i]= pFileName[i]; // <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD>
|
||||
*(u16*)(pBuffer + n + 0x1A)= *pCluster;
|
||||
if(ProgDiskPage(pBuffer,(*pDirAddr)-n)!= OK) return SEC_ERR;
|
||||
return OK;
|
||||
}
|
||||
i = OpenFileRd(pBuffer, pFileName, pCluster, pDirAddr);
|
||||
if (i != NEW)
|
||||
return i;
|
||||
else { // <20><>ǰ<EFBFBD><EFBFBD>Ϊ<EFBFBD>հ<EFBFBD>Ŀ¼<EFBFBD><EFBFBD>
|
||||
if (SeekBlank(pBuffer, pCluster) != OK)
|
||||
return OVER; // <20><>FAT<41><54><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
||||
n = *pDirAddr & 0xFF; // nΪ<EFBFBD><EFBFBD>ǰҳĿ¼<EFBFBD><EFBFBD>
|
||||
if (ReadDiskData(pBuffer, (*pDirAddr) - n, 256) != OK)
|
||||
return SEC_ERR;
|
||||
for (i = 0; i < 11; i++)
|
||||
pBuffer[n + i] = pFileName[i]; // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ¼<C4BF><C2BC>
|
||||
*(u16*) (pBuffer + n + 0x1A) = *pCluster;
|
||||
if (ProgDiskPage(pBuffer, (*pDirAddr) - n) != OK)
|
||||
return SEC_ERR;
|
||||
return OK;
|
||||
}
|
||||
}
|
||||
/*******************************************************************************
|
||||
<EFBFBD>ر<EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>FAT<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>Ŀ¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>FAT1<EFBFBD><EFBFBD>FAT2
|
||||
*******************************************************************************/
|
||||
u8 CloseFile(u8* pBuffer, u32 Lenght, u16* pCluster, u32* pDirAddr)
|
||||
{
|
||||
u16 n;
|
||||
Function: CloseFile
|
||||
Description: Closes a file that was previously opened
|
||||
Input:
|
||||
*******************************************************************************/
|
||||
u8 CloseFile(u8* pBuffer, u32 Lenght, u16* pCluster, u32* pDirAddr) {
|
||||
u16 n;
|
||||
|
||||
// *pCluster = *(pCluster+1); // <20><>ȡǰһ<C7B0><D2BB><EFBFBD>غ<EFBFBD>
|
||||
*(pCluster+1) = 0xFFF;
|
||||
SetCluster(pBuffer, pCluster);
|
||||
if(ReadDiskData(pBuffer, (*pDirAddr &(~0xFF)), 256)!= OK) return SEC_ERR;
|
||||
*(u8* )(pBuffer +(*pDirAddr & 0xFF)+ 0x0B)= 0x20;
|
||||
*(u32*)(pBuffer +(*pDirAddr & 0xFF)+ 0x1C)= Lenght;
|
||||
if(ProgDiskPage(pBuffer, (*pDirAddr &(~0xFF)))!= OK) return SEC_ERR;
|
||||
for(n=0; n<FAT1_SEC; n++) {
|
||||
if(ReadDiskData(pBuffer, FAT1_BASE+n*256, 256)!= OK) return SEC_ERR;
|
||||
if(ProgDiskPage(pBuffer, FAT2_BASE+n*256 )!= OK) return SEC_ERR;
|
||||
}
|
||||
return OK;
|
||||
*(pCluster + 1) = 0xFFF;
|
||||
SetCluster(pBuffer, pCluster);
|
||||
if (ReadDiskData(pBuffer, (*pDirAddr & (~0xFF)), 256) != OK)
|
||||
return SEC_ERR;
|
||||
*(u8*) (pBuffer + (*pDirAddr & 0xFF) + 0x0B) = 0x20;
|
||||
*(u32*) (pBuffer + (*pDirAddr & 0xFF) + 0x1C) = Lenght;
|
||||
if (ProgDiskPage(pBuffer, (*pDirAddr & (~0xFF))) != OK)
|
||||
return SEC_ERR;
|
||||
for (n = 0; n < FAT1_SEC; n++) {
|
||||
if (ReadDiskData(pBuffer, FAT1_BASE + n * 256, 256) != OK)
|
||||
return SEC_ERR;
|
||||
if (ProgDiskPage(pBuffer, FAT2_BASE + n * 256) != OK)
|
||||
return SEC_ERR;
|
||||
}
|
||||
return OK;
|
||||
}
|
||||
/******************************** END OF FILE *********************************/
|
||||
|
||||
Reference in New Issue
Block a user