So after a bit more hacking, I finally got this to work :-)
The problem was that in ecos/packages/fs/fat/fatfs.c, the code still uses this
old #define CYGSEM_FILEIO_BLOCK_USAGE so it was always returning EINVAL. Here
are the fixes to get it to work w/ the new DISK_USAGE rename that is generated
by configtool:
//#if defined(CYGSEM_FILEIO_BLOCK_USAGE)
// case FS_INFO_BLOCK_USAGE: {
#if defined(CYGSEM_FILEIO_INFO_DISK_USAGE)
case FS_INFO_DISK_USAGE: {
cyg_uint32 total_clusters;
cyg_uint32 free_clusters;
// struct cyg_fs_block_usage *usage = (struct cyg_fs_block_usage *) buf;
struct cyg_fs_disk_usage *usage = (struct cyg_fs_disk_usage *) buf;
And the code that uses the official ecos APIs is to read space/usage, etc is:
struct cyg_fs_disk_usage usage;
int err = cyg_fs_getinfo(path, FS_INFO_DISK_USAGE, &usage, sizeof(usage));
if ( err == 0 ) {
uint64_t blksize, totalblocks, freeblks;
totalblocks = usage.total_blocks;
freeblks = usage.free_blocks;
blksize = usage.block_size;
diskSize = totalblocks*blksize;
freeSpace = freeblks*blksize;
usedSpace = diskSize - freeSpace;
return true;
}
And wow, it's slow....2min 20sec to get free space on a 32MB card on an ancient
Atmel 14MHz AT91 processor :-P
ken
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