savelij13
b94c8f3bf3
- Added f_forward(). (Tiny-FatFs) - Added string functions: fputc(), fputs(), fprintf() and fgets(). - Improved performance of f_lseek() on move to the same or following cluster.
64 lines
2.6 KiB
Plaintext
64 lines
2.6 KiB
Plaintext
Patches for FatFs and Tiny-FatFs R0.06
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April 16, 2008 - FatFs and Tiny-FatFs
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------------------------------------------------------------------------------
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The va_arg(arp,char) used in fprintf() will cause an incorrect behavior on
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the big-endian processor due to type promotion rules. Thus the corresponding
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code should be changed to va_arg(arp,int).
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October 11, 2008 - FatFs and Tiny-FatFs
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------------------------------------------------------------------------------
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Warnings due to wrong cast may occure in the get_fileinfo function. To
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eliminate it, remove const attribute of the argument, "const BYTE *dir".
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October 22, 2008 - FatFs and Tiny-FatFs
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------------------------------------------------------------------------------
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Improving write performance. On sector misaligned long writes, FatFs issues
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sector write requests out of the sector order. It will decrease the write
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performance of flash memory storages. This is not the case on short writes
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without direct transfer. To solve this problem, apply following patches.
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--- ff.c Tue Apr 1 21:49:26 2008
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+++ ff_new.c Tue Oct 21 23:27:44 2008
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@@ -1018,6 +1018,11 @@
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fp->curr_clust = clust; /* Update current cluster */
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fp->csect = 0; /* Reset sector address in the cluster */
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}
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+ if (fp->flag & FA__DIRTY) { /* Write back file I/O buffer prior to following direct transfer */
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+ if (disk_write(fp->fs->drive, fp->buffer, fp->curr_sect, 1) != RES_OK)
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+ goto fw_error;
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+ fp->flag &= (BYTE)~FA__DIRTY;
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+ }
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sect = clust2sect(fp->fs, fp->curr_clust) + fp->csect; /* Get current sector */
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cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */
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if (cc) { /* Write maximum contiguous sectors directly */
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@@ -1030,11 +1035,6 @@
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continue;
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}
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if (sect != fp->curr_sect) { /* Is window offset changed? */
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- if (fp->flag & FA__DIRTY) { /* Write back file I/O buffer if needed */
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- if (disk_write(fp->fs->drive, fp->buffer, fp->curr_sect, 1) != RES_OK)
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- goto fw_error;
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- fp->flag &= (BYTE)~FA__DIRTY;
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- }
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if (fp->fptr < fp->fsize && /* Fill file I/O buffer with file data */
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disk_read(fp->fs->drive, fp->buffer, sect, 1) != RES_OK)
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goto fw_error;
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--- tff.c Tue Apr 1 21:49:28 2008
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+++ tff_new.c Wed Oct 22 02:13:05 2008
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@@ -1037,6 +1037,8 @@
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if (wcnt > btw) wcnt = btw;
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memcpy(&fp->fs->win[fp->fptr % 512U], wbuff, wcnt);
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fp->fs->winflag = 1;
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+ if (((UINT)fp->fptr + wcnt) % 512U == 0 /* Flush sector window when last byte is written */
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+ && !move_window(0)) goto fw_error;
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}
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if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
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