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sdfat.pla
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sdfat.pla
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include "inc/cmdsys.plh"
include "inc/spiport.plh"
//
// FAT I/O object
//
predef cwd(pathname), chdir(path), mkdir(path), rmdir(path), rename(newpath), remove, exists(path)
predef openFirst(filename), openNext(filename), open(path, mode)
predef close, read(buf, len), write(buf, len), sync, rewind, seek, seekOfs, pos
predef size, truncate, isDir, isFile
//
// SD card FAT filesystem interface
//
export byte[] sdFAT
word[] = @cwd, @chdir, @mkdir, @rmdir, @rename, @remove, @exists, @openFirst, @openNext, @open
word[] = @close, @read, @write, @sync, @rewind, @seek, @seekOfs, @pos
word[] = @size, @truncate, @isDir, @isFile
//
// Directory related functions
//
def cwd(pathname)
byte namelen
namelen = 0
spiSend(15) // CWD
namelen = spiRecv
if namelen
spiReadBuf(pathname+1, namelen)
fin
^pathname = namelen
return namelen
end
def chdir(path)
spiWriteBuf(path + 1, ^path)
spiSend(16) // CHGDIR
return spiRecv
end
def mkdir(path)
return 0
end
def rmdir(path)
return 0
end
def rename(newpath)
return 0
end
def remove
return 0
end
def exists(path)
return 0
end
def openDir(cmd, filename)
byte namelen
namelen = 0
spiSend(cmd)
namelen = spiRecv
if namelen == $FF
namelen = 0
fin
if namelen
spiReadBuf(filename+1, namelen)
fin
^filename = namelen
return namelen
end
def openFirst(filename) // return filename in buffer
return openDir(22, filename) // OPENFIRST
end
def openNext(filename) // return filename i buffer
return openDir(23, filename) // OPENNEXT
end
//
// File related functions
//
def open(path, mode)
spiWriteBuf(path + 1, ^path) // send filename
spiSend(21) // OPEN
spiSend(mode)
return spiRecv // status
end
def close
return spiSend(24) // CLOSE
end
def read(buf, len)
if len > 512
len = 512
fin
spiSend(25) // READ
spiSend(len >> 8); spiSend(len)
len = (spiRecv << 8) | spiRecv
if len > 0
spiReadBuf(buf, len)
fin
return len
end
def write(buf, len)
if len > 512
len = 512
fin
spiWriteBuf(buf, len)
spiSend(26) // WRITE
spiSend(len >> 8); spiSend(len)
len = (spiRecv << 8) | spiRecv
return len
end
def sync
return 0
end
def rewind
return 0
end
def seek
return 0
end
def seekOfs
return 0
end
def pos
return 0
end
def size
return 0
end
def truncate
return 0
end
def isDir
spiSend(35) // ISDIR
return spiRecv
end
def isFile
return 0
end
//
// Init SD card FAT filesystem
//
spiSend(14) // SDINIT
return spiReady <> 0 // Is Arduino READY?
done