Дополнительные команды AVR-DOS — различия между версиями

Текущая версия на 08:29, 9 января 2009

Список команд AVR-DOS — список функций библиотеки AVR-DOS.

Содержание

1 Диск/Директория
- 1.1 FileDate
- 1.2 FileTime
2 Файлы
- 2.1 Flush
- 2.2 Get
- 2.3 Put
- 2.4 Seek
3 Свойства файла
- 3.1 LOC
- 3.2 FileAttr
4 Другие
- 4.1 Bload
- 4.2 Bsave
5 Сноски
6 См. также

Диск/Директория

FileDate

Возвращает дату создания или последнего изменения файла.

sDate = FileDate ()

sDate = FileDate (file)

sDate(String)	Дата создания или изменения(?) файла
File(String)	Имя файла в текущей директории^[1]^[2]

Пример вызова:

<source lang="vb"> Print "File demo" Print Filelen( "josef.img") ; " length" ' length of file Print Filetime( "josef.img") ; " time" ' time file was changed Print Filedate( "josef.img") ; " date" ' file date </source>

FileTime

Возвращает время создания или последнего изменения файла.

sTime = FileTime ()

sTime = FileTime (file)

sTime(String)	Время создания или изменения(?) файла
File(String)	Имя файла в текущей директории^[1]^[2]

Пример вызова:

<source lang="vb"> Print "File demo" Print Filelen( "josef.img") ; " length" ' length of file Print Filetime( "josef.img") ; " time" ' time file was changed Print Filedate( "josef.img") ; " date" ' file date </source>

Файлы

Flush

Скидывает кеш текущего файла на диск и обновляет информацию раздела, директории.

Процедура осуществляет запись всей несохраненной информации о/в файле на диск. Обычно запись на диск производится при закрытии файлового потока или переходе на другой сектор файла, однако вы можете поменять параметр cFATDirSaveAtEnd, в этом случае вам придется принудительно сбрасывать изменения файла на диск.

Flush #bFileNumber

Flush

BFileNumber(Byte)	Идентификационный номер открытого файлового потока^[3]. Если не указан, то изменения всех открытых файлов сбрасываются на диск.

Пример вызова:

<source lang="vb"> $include "startup.inc"

'open the file in BINARY mode Open "test.biN" For Binary As #2 Put #2 , B ' write a byte Put #2 , W ' write a word Put #2 , L ' write a long Ltemp = Loc(#2) + 1 ' get the position of the next byte Print Ltemp ; " LOC" ' store the location of the file pointer Print Lof(#2) ; " length of file" Print Fileattr(#2) ; " file mode" ' should be 32 for binary Put #2 , Sn ' write a single Put #2 , Stxt ' write a string

Flush #2 ' flush to disk Close #2 </source>

Get

Reads a byte from the hardware or software UART. Reads data from a file opened in BINARY mode.

GET in combination with the software/hardware UART is provided for compatibility with BASCOM-8051. It reads one byte. GET in combination with the AVR-DOS filesystem is very flexible and versatile. It works on files opened in BINARY mode and you can reads all data types. By default you only need to provide the variable name. When the variable is a byte, 1 byte wil be read. When the variable is a word or integer, 2 bytes will be read. When the variable is a long or single, 4 bytes will be read. When the variable is a string, the number of bytes that will be read is equal to the dimensioned size of the string. DIM S as string * 10 , would read 10 bytes. Note that when you specify the length for a string, the maximum length is 255. The maximum length for a non-string array is 65535. <source lang="vb"> Example : GET #1 , var ,,2 ‘ read 2 bytes, start at current position GET #1, var , PS ‘ start at position stored in long PS GET #1, var , PS, 2 ‘ start at position stored in long PS and read 2 bytes</source>

GET #channel, var

GET #channel, var , [pos] [, length]

#channel(...)	A channel number, which identifies an opened file. This can be a hard coded constant or a variable
Var(...)	The variable or variable array that will be assigned with the data from the file
Pos(...)	This is an optional parameter that may be used to specify the postion where the reading must start from. This must be a long variable
Length(...)	This is an optional parameter that may be used to specify how many bytes must be read from the file.

Пример вызова:

<source lang="vb"> 'for the binary file demo we need some variables of different types Dim B As Byte , W As Word , L As Long , Sn As Single , Ltemp As Long Dim Stxt As String * 10 B = 1 : W = 50000 : L = 12345678 : Sn = 123.45 : Stxt = "test"

'open the file in BINARY mode Open "test.biN" For Binary As #2 Put #2 , B ' write a byte Put #2 , W ' write a word Put #2 , L ' write a long Ltemp = Loc(#2) + 1 ' get the position of the next byte Print Ltemp ; " LOC" ' store the location of the file pointer Print Seek(#2) ; " = LOC+1"

Print Lof(#2) ; " length of file" Print Fileattr(#2) ; " file mode" ' should be 32 for binary Put #2 , Sn ' write a single Put #2 , Stxt ' write a string

Flush #2 ' flush to disk Close #2

'now open the file again and write only the single Open "test.bin" For Binary As #2 L = 1 'specify the file position B = Seek(#2 , L) ' reset is the same as using SEEK #2,L Get #2 , B ' get the byte Get #2 , W ' get the word Get #2 , L ' get the long Get #2 , Sn ' get the single Get #2 , Stxt ' get the string Close #2 </source>

Put

Writes a byte to the hardware or software UART. Writes data to a file opened in BINARY mode.

PUT in combination with the software/hardware UART is provided for compatibility with BASCOM-8051. It writes one byte PUT in combination with the AVR-DOS filesystem is very flexible and versatile. It works on files opened in BINARY mode and you can write all data types. By default you only need to provide the variable name. When the variable is a byte, 1 byte wil be written. When the variable is a word or integer, 2 bytes will be written. When the variable is a long or single, 4 bytes will be written. When the variable is a string, the number of bytes that will be written is equal to the dimensioned size of the string. DIM S as string * 10 , would write 10 bytes. Note that when you specify the length for a string, the maximum length is 255. The maximum length for a non-string array is 65535. Example: <source lang="vb"> PUT #1, var PUT #1, var , , 2 ‘ write 2 bytes at default position PUT #1, var ,PS, 2 ‘ write 2 bytes at location storied in variable PS</source>

PUT #channel, var

PUT #channel, var ,[pos] [,length]

#channel(...)	A channel number, which identifies an opened file. This can be a hard coded constant or a variable.
Var(...)	The variable or variable array that will be written to the file
Pos(...)	This is an optional parameter that may be used to specify the postion where the data must be written to. This must be a long variable.
Length(...)	This is an optional parameter that may be used to specify how many bytes must be written to the file.

Пример вызова:

<source lang="vb"> 'for the binary file demo we need some variables of different types Dim B As Byte , W As Word , L As Long , Sn As Single , Ltemp As Long Dim Stxt As String * 10 B = 1 : W = 50000 : L = 12345678 : Sn = 123.45 : Stxt = "test"

'open the file in BINARY mode Open "test.biN" For Binary As #2 Put #2 , B ' write a byte Put #2 , W ' write a word Put #2 , L ' write a long Ltemp = Loc(#2) + 1 ' get the position of the next byte Print Ltemp ; " LOC" ' store the location of the file pointer Print Seek(#2) ; " = LOC+1"

Print Lof(#2) ; " length of file" Print Fileattr(#2) ; " file mode" ' should be 32 for binary Put #2 , Sn ' write a single Put #2 , Stxt ' write a string

Flush #2 ' flush to disk Close #2

'now open the file again and write only the single Open "test.bin" For Binary As #2 L = 1 'specify the file position B = Seek(#2 , L) ' reset is the same as using SEEK #2,L Get #2 , B ' get the byte Get #2 , W ' get the word Get #2 , L ' get the long Get #2 , Sn ' get the single Get #2 , Stxt ' get the string Close #2 </source>

Seek

Function: Returns the position of the next Byte to be read or written. Statement: Sets the position of the next Byte to be read or written.

This function returns the position of the next Byte to be read or written. If an error occures, 0 is returned. Check DOS-Error in variable gbDOSError^[4].. The statetement also returns an error in the gbDOSerror variable in the event that an error occurs. You can for example not set the fileposition behinds the filesize. In QB/VB the file is filled with 0 bytes when you set the filepointer behind the size of the file. For embedded systems this does not seem a good idea. Seek and Loc seems to do the same function, but take care : the seek function will return the position of the next read/write, while the Loc function returns the position of the last read/write. You may say that Seek = Loc+1. Difference with QB In QB/VB you can use seek to make the file bigger. When a file is 100 bytes long, setting the filepointer to 200 will increase the file with 0 bytes. By design this is not the case in AVR-DOS.

Function: NextReadWrite = Seek (#bFileNumber)

Statement: Seek #bFileNumber, NewPos)

bFileNumber(Byte)	Filenumber, which identifies an opened file
NextReadWrite(Long)	A Long Variable, which is assigned with the Position of the next Byte to be read or written (1-based)
NewPos(Long)	A Long variable that holds the new position the filepointer must be set too.

Пример вызова:

<source lang="vb"> Open "test.biN" For Binary As #2 Put #2 , B ' write a byte Put #2 , W ' write a word Put #2 , L ' write a long Ltemp = Loc(#2) + 1 ' get the position of the next byte Print Ltemp ; " LOC" ' store the location of the file pointer Print Seek(#2) ; " = LOC+1"

Close #2

'now open the file again and write only the single Open "test.bin" For Binary As #2 Seek #2 , Ltemp ' set the filepointer Sn = 1.23 ' change the single value so we can check it better Put #2 , Sn = 1 'specify the file position Close #2 </source>

Свойства файла

LOC

Returns the position of last read or written Byte of the file.

This function returns the position of the last read or written Byte. If an error occurs, 0 is returned. Check DOS-Error in variable gbDOSError^[4].. If the file position pointer is changed with the command SEEK, this function can not be used till the next read/write operation. Difference with QB This function differs from QB. In QB the byte position is divided by 128.

lLastReadWritten = Loc (#bFileNumber)

bFileNumber(Byte)	Filenumber, which identifies an opened file
lLastReadWritten(Long)	Variable, whichsigned with the Position of last read or written Byte (1-based)

Пример вызова:

<source lang="vb"> 'open the file in BINARY mode Open "test.biN" For Binary As #2 Put #2 , B ' write a byte Put #2 , W ' write a word Put #2 , L ' write a long Ltemp = Loc(#2) + 1 ' get the position of the next byte Print Ltemp ; " LOC" ' store the location of the file pointer Print Lof(#2) ; " length of file" Print Fileattr(#2) ; " file mode" ' should be 32 for binary Put #2 , Sn ' write a single Put #2 , Stxt ' write a string

Flush #2 ' flush to disk Close #2 </source>

FileAttr

Возвращает режим открытия файлового потока.

bFileAttribut = FileAttr (bFileNumber)

bFileAttribut(Long)	Режим: 1 - INPUT 2 - OUTPUT 8 - APPEND 32 - BINARY
bFileNumber(Byte)	Идентификационный номер открытого файлового потока^[3]

Пример вызова:

<source lang="vb"> 'open the file in BINARY mode Open "test.biN" For Binary As #2 Print Fileattr(#2) ; " file mode" ' should be 32 for binary Put #2 , Sn ' write a single Put #2 , Stxt ' write a string Close #2 </source>

Другие

Bload

Writes the Content of a File into SRAM.

This function writes the content of a file to a desired space in SRAM. A free handle is needed for this function.

BLoad sFileName, wSRAMPointer

sFileName(Long)	Name of the File to be read
wSRAMPointer(Word)	Variable, which holds the SRAM Address to which the content of the file should be written

Пример вызова:

<source lang="vb"> 'now the good old bsave and bload Dim Ar(100) As Byte , I As Byte For I = 1 To 100 Ar(i) = I ' fill the array Next

Wait 2

W = Varptr(ar(1)) Bsave "josef.img" , W , 100 For I = 1 To 100 Ar(i) = 0 ' reset the array Next

Bload "josef.img" , W ' Josef you are amazing !

For I = 1 To 10 Print Ar(i) ; " " ; Next Print </source>

Bsave

Save a range in SRAM to a Fileю

This function writes a range from the SRAM to a file. A free file handle is needed for this function.

BSave sFileName, wSRAMPointer, wLength

sFileName(Long)	Name of the File to be written
wSRAMPointer(Word)	Variable, which holds the SRAM Address, from where SRAM should be written to a File
wLength(Word)	Count of Bytes from SRAM, which should be written to the file

Пример вызова:

<source lang="vb">'now the good old bsave and bload Dim Ar(100) As Byte , I As Byte For I = 1 To 100 Ar(i) = I ' fill the array Next

Wait 2

W = Varptr(ar(1)) Bsave "josef.img" , W , 100 For I = 1 To 100 Ar(i) = 0 ' reset the array Next

Bload "josef.img" , W ' Josef you are amazing !

For I = 1 To 10 Print Ar(i) ; " " ; Next Print </source>

Сноски

↑ ¹ ² 8.3: имя - 8 символов, расширение - 3 символа, разделитель(точка) - 1 символ, всего не более 12 символов
↑ ¹ ² Если не указано, параметром считается последний файл, выбранный с помощью DIR
↑ ¹ ² Принадлежит целому множеству 0..255, может быть переменной или константой. Используйте числа 1..127 для пользовательских идентификаторов. Для получения свободного идентификатора используйте функцию FreeFile(возвращает 128..255) Ошибка цитирования Неверный тег <ref>: название «identnumber» определено несколько раз для различного содержимого
↑ ¹ ² Коды ошибок

См. также

[dosnames-1] ¹ ² 8.3: имя - 8 символов, расширение - 3 символа, разделитель(точка) - 1 символ, всего не более 12 символов

[dirnames-2] ¹ ² Если не указано, параметром считается последний файл, выбранный с помощью DIR

[identnumber-3] ¹ ² Принадлежит целому множеству 0..255, может быть переменной или константой. Используйте числа 1..127 для пользовательских идентификаторов. Для получения свободного идентификатора используйте функцию FreeFile(возвращает 128..255) Ошибка цитирования Неверный тег <ref>: название «identnumber» определено несколько раз для различного содержимого

[OkrDOS-4] ¹ ² Коды ошибок

[1]

[2]

[3]

[4]

Дополнительные команды AVR-DOS — различия между версиями

Текущая версия на 08:29, 9 января 2009

Содержание

Диск/Директория

FileDate

FileTime

Файлы

Flush

Get

Put

Seek

Свойства файла

LOC

FileAttr

Другие

Bload

Bsave

Сноски

См. также

Навигация

Персональные инструменты

Пространства имён

Варианты

Просмотры

Ещё

Поиск

Навигация

Инструменты

@@ Строка 1: / Строка 1: @@
 [[Категория:AVR-DOS]]
-'''Список команд AVR-DOS''' — список функций библиотеки
+'''Список команд AVR-DOS''' — список функций библиотеки [[AVR-DOS]].
-[[AVR-DOS]].
 == Диск/Директория ==
-=== InitFileSystem ===
-Читает Master boot record и partition boot record (Sector) диска(флэш-карты) и инициализирует файловую систему.
-'''Эта функция должна быть вызвана перед любым другим использованием системы!'''
-<code>bErrorCode = InitFileSystem (bPartitionNumber)</code>
-{| class="wikitable"
-| bErrorCode(Byte)
-| Код ошибки, возвращает 0 если система успешно запущена.
-|-
-| bPartitionNumber(Byte)
-| Partitionnumber on the Flashcard Drive (normally 1, but use 0 on mediums without Master boot record)
-|}
-Пример вызова:
-<source lang="vb">Dim bErrorCode as Byte
-bErrorCode = InitFileSystem(1)
-If bErrorCode > 0 then
-Print "Error: " ; bErrorCode
-Else
-Print "Filesystem successfully initialized"
-End If
-</source>
-=== DiskSize ===
-Возвращает размер диска.
-<code>lSize = DiskSize ()</code>
-{| class="wikitable"
-| lSize(Long)
-| Объем диска в КБайтах
-|}
-Пример вызова:
-<source lang="vb">Dim Gbtemp1 As Byte ' scratch byte
-Gbtemp1 = Initfilesystem(1) ' we must init the
-filesystem once
-If Gbtemp1 > 0 Then
-Print #1 , "Error " ; Gbtemp1
-Else
-Print #1 , " OK"
-Print "Disksize : " ; Disksize() ' show disk size in
-Kbytes
-Print "Disk free: " ; Diskfree() ' show free space too
-End If
-</source>
-=== DiskFree ===
-Возвращает размер свободного пространства диска.
-<code>lFreeSize = DiskFree ()</code>
-{| class="wikitable"
-| lFreeSize(Long)
-| Размер свободной области в КБайтах
-|}
-Пример вызова:
-<source lang="vb">Dim Gbtemp1 As Byte ' scratch byte
-Gbtemp1 = Initfilesystem(1) ' we must init the
-filesystem once
-If Gbtemp1 > 0 Then
-Print #1 , "Error " ; Gbtemp1
-Else
-Print #1 , " OK"
-Print "Disksize : " ; Disksize() ' show disk size in
-Kbytes
-Print "Disk free: " ; Diskfree() ' show free space too
-End If
-</source>
-=== Kill ===
-Удаляет файл с диска. Открытый файл не может быть удален. Специальные символы(WildCards) в имени файла, применение масок не поддерживаются. Код ошибки хранится в глобальной переменной gDOSError<ref name="OkrDOS">Подробнее [[Окружение AVR-DOS]]</ref>.
-<code>Kill sFileName</code>
-{| class="wikitable"
-| sFileName(String)
-| Имя файла в текущей директории
-|}
-Пример вызова:
-<source lang="vb">'We can use the KILL statement to delete a file.
-'A file mask is not supported
-Print "Kill (delete) file demo"
-Kill "test.txt"
-</source>
-=== Dir ===
-Возвращает имя файла, удовлетворяющее маске.
-Первый вызов функции содержит маску. Все последующие
-вызовы совершаются без маски. Фактически, когда вы
-хотите получить имя следующего файла в данной
-директории, удовлетворяющее маске, вы должны вызывать
-вариант функции без параметров после первого вызова.
-<code>sFile = Dir(mask)</code>
-<code>sFile = Dir()</code>
-{| class="wikitable"
-| SFile(String)
-| Имя файла. Строка пуста, если больше нет файлов,
-удовлетворяющих маске
-|-
-| Mask(String)
-| Файловая маска, удовлетворяющая требованиям обычного
-DOS, напр. *.TXT. Маска *.* удовлетворяет всем файлам
-|}
-Пример вызова:
-<source lang="vb">'Lets have a look at the file we created
-Print "Dir function demo"
-S = Dir( "*.*")
-'The first call to the DIR() function must contain a
-file mask
-' The * means everything.
-'
-While Len(s) > 0 ' if there was a file found
-Print S ; " " ; Filedate() ; " " ; Filetime() ; " " ;
-Filelen()
-' print file , the date the fime was created/changed ,
-the time and the size of the file
-S = Dir() ' get next
-Wend
-</source>
-=== FileLen ===
-Возвращает размер файла.
-<code>lSize = FileLen ()</code>
-<code>lSize = FileLen (file)</code>
-{| class="wikitable"
-| lSize(Long)
-| Размер файла в Байтах
-|-
-| File(String)
-| Имя файла в текущей директории. Если не указано,
-параметром считается последний файл, выбранный с помощью
-DIR()
-|}
-Пример вызова:
-<source lang="vb">Print "File demo"
-Print Filelen( "josef.img") ; " length" ' length of file
-Print Filetime( "josef.img") ; " time" ' time file was
-changed
-Print Filedate( "josef.img") ; " date" ' file date
-</source>
 === FileDate ===
-Возвращает дату создания или изменения(?) файла.
+Возвращает дату создания или последнего изменения файла.
 <code>sDate = FileDate ()</code>
@@ Строка 194: / Строка 15: @@
 |-
 | File(String)
-| Имя файла в текущей директории. Если не указано,
+| Имя файла в текущей директории<ref name="dosnames">'''8.3''': имя - 8 символов, расширение - 3 символа, разделитель(точка) - 1 символ, всего не более 12 символов</ref><ref name="dirnames">Если не указано, параметром считается последний файл, выбранный с помощью [[Основные команды AVR-DOS#Dir|DIR]]</ref>
-параметром считается последний файл, выбранный с помощью
-DIR()
 |}
 Пример вызова:
-<source lang="vb">Print "File demo"
+<source lang="vb"> Print "File demo"
 Print Filelen( "josef.img") ; " length" ' length of file
-Print Filetime( "josef.img") ; " time" ' time file was
+Print Filetime( "josef.img") ; " time" ' time file was changed
-changed
 Print Filedate( "josef.img") ; " date" ' file date
 </source>
 === FileTime ===
-Возвращает время создания или изменения(?) файла.
+Возвращает время создания или последнего изменения файла.
 <code>sTime = FileTime ()</code>
@@ Строка 223: / Строка 38: @@
 |-
 | File(String)
-| Имя файла в текущей директории. Если не указано,
+| Имя файла в текущей директории<ref name="dosnames">'''8.3''': имя - 8 символов, расширение - 3 символа, разделитель(точка) - 1 символ, всего не более 12 символов</ref><ref name="dirnames">Если не указано, параметром считается последний файл, выбранный с помощью [[Основные команды AVR-DOS#Dir|DIR]]</ref>
-параметром считается последний файл, выбранный с помощью
-DIR()
 |}
 Пример вызова:
-<source lang="vb">Print "File demo"
+<source lang="vb"> Print "File demo"
 Print Filelen( "josef.img") ; " length" ' length of file
-Print Filetime( "josef.img") ; " time" ' time file was
+Print Filetime( "josef.img") ; " time" ' time file was changed
-changed
 Print Filedate( "josef.img") ; " date" ' file date
-</source>
-=== FileDateTime ===
-Возвращает дату и время создания или изменения(?) файла.
-<code>Var = FileDateTime ()</code>
-<code>Var = FileDateTime (file)</code>
-{| class="wikitable"
-| Var(String)
-| Время создания или изменения(?) файла
-|-
-| File(String)
-| When the target variable is a string, it must be
-dimensioned with a length of at least 17 bytes.
-|-
-| File(Byte array)
-| When the target variable is a byte array, the array
-size must be at least 6 bytes.
-|-
-| File(Numeric)
-| When you use a numeric variable, the internal file
-date and time format will be used.
-|}
-Пример вызова:
-<source lang="vb">' Read and print Directory and show Filename, Date,
-Time, Size
-' for all files matching pStr1 and create/update younger
-than pDays
-Sub Directorylist(pstr1 As String , Byval Pdays As Word)
-Local lFileName as String * 12 ' hold file name for
-print
-Local lwCounter as Word , lFileSizeSum as Long ' for
-summary
-Local lwNow as Word , lwDays as Word
-Local lSec as Byte , lMin as Byte , lHour as byte , lDay
-as byte , lMonth as byte , lYear as byte
-print "Listing of all Files matching " ; pStr1 ; " and
-create/last update date within " ; pdays ; " days"
-lwNow = SysDay()
-lwCounter = 0 : lFileSizeSum = 0
-lFileName = Dir(pStr1)
-While lFileName <> ""
-lsec = FileDateTime()
-lwDays = lwNow - SysDay(lDay) ' Days between Now and
-last File Update; uses lDay, lMonth, lYear
-if lwDays <= pDays then ' days smaller than desired with
-parameter
-print lFileName ; FileDate() ; " " ; FileTime() ; " " ;
-filelen()
-incr lwCounter : lFileSizeSum = FileLen() + lFileSizeSum
-end if
-lFileName = Dir()
-WEnd
-print lwCounter ; " File(s) found with " ; lFileSizeSum
-; " Byte(s)"
-End Sub
-</source>
-=== GetAttr ===
-Возвращает атрибуты файла.
-<code>bAttr = FileDate ()</code>
-<code>bAttr = FileDate (file)</code>
-{| class="wikitable"
-| bAttr(Byte)
-| Атрибуты файла, совместимые с DOS-форматом. Байт
-расшифровывается как '''00ADVSHR''', где биты 5-0:
-'''A''' - Архивный<br/>
-'''D''' - Директория<br/>
-'''V''' - Volume ID(?)<br/>
-'''S''' - Системный<br/>
-'''H''' - Скрытый<br/>
-'''R''' - Только чтение<br/>
-|-
-| File(String)
-| Имя файла в текущей директории. Если не указано,
-параметром считается последний файл, выбранный с помощью
-DIR()
-|}
-Пример вызова:
-<source lang="vb">Print "File demo"
-Print Filelen( "josef.img") ; " length" ' length of file
-Print Filetime( "josef.img") ; " time" ' time file was
-changed
-Print Filedate( "josef.img") ; " date" ' file date
-Print Bin(GetAttr(“Josef.img”)) ; “Attributes” ‘ DOS
-Attributes
-</source>
-=== Name ===
-Переименовывает файл в текущей директории. Файл с новым
-именем не должен существовать в текущей директории,
-иначе команда вернет ошибку. Код ошибки можно посмотреть
-в глобальной переменной gbDOSError<ref
-name="OkrDOS">Подробнее [[Окружение AVR-DOS]]</ref>.
-<code>Name <strOldFilename> As <strNewFileName></code>
-{| class="wikitable"
-| strOldFileName(String)
-| Старое имя файла
-|-
-| strNewFileName(String)
-| Новое имя файла
-|}
-Пример вызова:
-<source lang="vb">Dim strOldFileName as String * 12
-Dim strNewFileName as String * 12
-strOldFileName = "Data.txt"
-strNewFileName = "Data.bak"
-Name strOldFilename As strNewFileName
-</source>
-=== ChDir ===
-Изменяет текущую директорию.<br />
-'''Функции Kill, Dir, ChDir, MkDir, RmDir, Name,
-FileLen, FileDateTime, FileDate, FileTime, GetAttr,
-Open, BLoad и BSave работают только в текущей
-директории. Обращаться к файлу с помощью составного пути
-запрещается!'''
-<code>ChDIR (strDirectoryName)</code>
-{| class="wikitable"
-| strDirectoryName(String)
-| Путь к новой директории, длина не более 8 символов.
-Допускаются следующие спецсимволы:<br />
-"." - на директорию выше<br />
-"\" - в корень диска
-|}
-Пример вызова:
-<source lang="vb">Dim strDirectory as String * 12
-ChDir "SubDir"
-' or
-strDirectory = "SubDir"
-ChDir strDirectory
-' Change to next higher directory
-ChDir "."
-' Change to Root Directory
-strDirectory = "\"
-ChDir strDirectory
-</source>
-=== MkDir ===
-Создает каталог в текущей директории.
-<code>MkDIR (strDirectoryName)</code>
-{| class="wikitable"
-| strDirectoryName(String)
-| Имя новой директории, не более 8 символов
-|}
-Пример вызова:
-<source lang="vb">Dim strDirectory as String * 12
-MkDir "NewDir"
-' or
-strDirectory = "NewDir"
-MkDir strDirectory
-</source>
-=== RmDir ===
-Удаляет каталог в текущей директории.
-<code>RmDIR (strDirectoryName)</code>
-{| class="wikitable"
-| strDirectoryName(String)
-| Имя каталога для удаления, не более 8 символов
-|}
-Пример вызова:
-<source lang="vb">Dim strDirectory as String * 12
-MkDir "NewDir"
-' or
-strDirectory = "NewDir"
-MkDir strDirectory
 </source>
 == Файлы ==
-=== FreeFile ===
-Возвращает свободный файловый номер(filenumber). Функция
-обеспечивает совместимость с QB.
-<code>bFileNumber = FreeFile()</code>
-{| class="wikitable"
-| bFileNumber(Byte)
-| Свободный файловый номер, который может использоваться
-для открытия новых файлов. В отличие от QB, этот
-файловый номер начинается с 128  и заканчивается 255.
-Используйте числа 1..127 для пользовательских номеров,
-чтобы избежать конфликтов номеров при использованиии
-функции.
-|}
-Пример вызова:
-<source lang="vb">Ff = Freefile() ' get file handle
-Open "test.txt" For Input As #ff ' we can use a constant
-for the file too
-Print Lof(#ff) ; " length of file"
-Print Fileattr(#ff) ; " file mode" ' should be 1 for
-input
-Do
-Line Input #ff , S ' read a line
-' line input is used to read a line of text from a file
-Print S ' print on terminal emulator
-Loop Until Eof(ff) <> 0
-'The EOF() function returns a non-zero number when the
-end of the file is reached
-'This way we know that there is no more data we can read
-Close #ff
-</source>
-=== Open ===
-Открывает устройство.
-<code>OPEN "device" for MODE As #channel</code>
-<code>OPEN file FOR MODE as #channel</code>
-{| class="wikitable"
-| Device
-| The default device is COM1 and you don't need to open
-a channel to use INPUT/OUTPUT on this device.
-With the implementation of the software UART, the
-compiler must know to which pin/device you will
-send/receive the data.
-So that is why the OPEN statement must be used. It tells
-the compiler about the pin you use for the serial input
-or output and the baud rate you want to use.
-COMB.0:9600,8,N,2 will use PORT B.0 at 9600 baud with 2
-stopbits.
-The format for COM1 and COM2 is : COM1: or COM2:
-There is no speed/baud rate parameter since the default
-baud rate will be used that is specified with $BAUD or
-$BAUD1
-The format for the software UART is:
-COMpin:speed,8,N,stopbits[,INVERTED]
-Where pin is the name of the PORT-pin.
-Speed must be specified and stop bits can be 1 or 2.
-bit data or 8 bit data may be used.
-For parity N, O or E can be used.
-An optional parameter ,INVERTED can be specified to use
-inverted RS-232.
-Open "COMD.1:9600,8,N,1,INVERTED" For Output As #1 ,
-will use pin PORTD.1 for output with 9600 baud, 1 stop
-bit and with inverted RS-232.
-For the AVR-DOS filesystem, Device can also be a string
-or filename constant like
-"readme.txt" or sFileName
-|-
-| Mode
-| You can use BINARY or RANDOM for COM1 and COM2, but
-for the software UART pins, you must specify INPUT or
-OUTPUT
-For the AVR-DOS filesystem, MODE may be INPUT, OUTPUT,
-APPEND or BINARY
-|-
-| Channel
-| The number of the channel to open. Must be a positive
-constant >0
-For the AVR-DOS filesystem, the channel may be a
-positive constant or a numeric variable. Note that the
-AVD-DOS filesystem uses real filehandles. The software
-UART does not use real file handles.
-|}
-Пример вызова:
-<source lang="vb">OPEN "com1:" for binary as #1
-Call test
-End
-Sub test
-Print #1, "test"
-End Sub
-Close #1
-</source>
-=== Close ===
-Освобождает открытое устройство.
-The statements that support the device are PRINT , INPUT
-and INPUTHEX , INKEY, WAITKEY.
-Every opened device must be closed using the CLOSE
-#channel statement. Of course, you must use the same
-channel number.
-The best place for the CLOSE statement is at the end of
-your program.
-The INPUT statement in combination with the software
-UART, will not echo characters back because there is no
-default associated pin for this.
-For the AVR-DOS filesystem, you may place the CLOSE at
-any place in your program. This because the filesystem
-supports real file handles.
-<code>OPEN "device" for MODE As #channel<br />
-...<br />
-CLOSE #channel </code>
-{| class="wikitable"
-| Device
-| The default device is COM1 and you don't need to open
-a channel to use INPUT/OUTPUT on this device.
-With the implementation of the software UART, the
-compiler must know to which pin/device you will
-send/receive the data.
-So that is why the OPEN statement must be used. It tells
-the compiler about the pin you use for the serial input
-or output and the baud rate you want to use.
-COMB.0:9600,8,N,2 will use PORT B.0 at 9600 baud with 2
-stop bits.
-The format for COM1 is : COM1:
-Some chips have 2 UARTS. You can use COM2: to open the
-second HW UART.
-The format for the software UART is:
-COMpin:speed,8,N,stop bits[,INVERTED]
-Where pin is the name of the PORT-pin.
-Speed must be specified and stop bits can be 1 or 2.
-An optional parameter ,INVERTED can be specified to use
-inverted RS-232.
-Open "COMD.1:9600,8,N,1,INVERTED" For Output As #1 ,
-will use pin PORTD.1 for output with 9600 baud, 1 stop
-bit and with inverted RS-232
-|-
-|MODE
-|You can use BINARY or RANDOM for COM1 and COM2, but for
-the software UART pins, you must specify INPUT or OUTPUT
-|-
-|Channel
-|The number of the channel to open. Must be a positive
-constant >0
-|}
-Пример вызова:
-<source lang="vb">$crystal = 10000000 'change to the value of the
-XTAL you have installed
-Dim B As Byte
-'Optional you can fine tune the calculated bit delay
-'Why would you want to do that?
-'Because chips that have an internal oscillator may not
-'run at the speed specified. This depends on the
-voltage, temp etc.
-'You can either change $CRYSTAL or you can use
-'BAUD #1,9610
-'In this example file we use the DT006 from
-www.simmstick.com
-'This allows easy testing with the existing serial port
-'The MAX232 is fitted for this example.
-'Because we use the hardware UART pins we MAY NOT use
-the hardware UART
-'The hardware UART is used when you use PRINT, INPUT or
-other related statements
-'We will use the software UART.
-Waitms 100
-'open channel for output
-Open "comd.1:19200,8,n,1" For Output As #1
-Print #1 , "serial output"
-'Now open a pin for input
-Open "comd.0:19200,8,n,1" For Input As #2
-'since there is no relation between the input and output
-pin
-'there is NO ECHO while keys are typed
-Print #1 , "Number"
-'get a number
-Input #2 , B
-'print the number
-Print #1 , B
-'now loop until ESC is pressed
-'With INKEY() we can check if there is data available
-'To use it with the software UART you must provide the
-channel
-Do
-'store in byte
-B = Inkey(#2)
-'when the value > 0 we got something
-If B > 0 Then
-Print #1 , Chr(b) 'print the character
-End If
-Loop Until B = 27
-Close #2
-Close #1
-'OPTIONAL you may use the HARDWARE UART
-'The software UART will not work on the hardware UART
-pins
-'so you must choose other pins
-'use normal hardware UART for printing
-'Print B
-'When you dont want to use a level inverter such as the
-MAX-232
-'You can specify ,INVERTED :
-'Open "comd.0:300,8,n,1,inverted" For Input As #2
-'Now the logic is inverted and there is no need for a
-level converter
-'But the distance of the wires must be shorter with this
-End
-</source>
 === Flush ===
-Write current buffer of File to Card and updates
+Скидывает кеш текущего файла на диск и обновляет информацию раздела, директории.
-Directory. This function writes all information of an
-open file, which is not saved yet to the Disk. Normally
-the Card is updated, if a file will be closed or changed
-to another sector. When no filenumber is specified, all
-open files will be flushed.
+Процедура осуществляет запись всей несохраненной информации о/в файле на диск. Обычно запись на диск производится при закрытии файлового потока или переходе на другой сектор файла, однако вы можете поменять параметр [[Окружение AVR-DOS#Конфигурация файловой системы|cFATDirSaveAtEnd]], в этом случае вам придется принудительно сбрасывать изменения файла на диск.
 <code>Flush #bFileNumber</code>
@@ Строка 784: / Строка 61: @@
 {| class="wikitable"
 | BFileNumber(Byte)
-| Filenumber, which identifies an opened file such as #1
+| Идентификационный номер открытого файлового потока<ref name="identnumber">Принадлежит целому множеству 0..255, может быть переменной или константой. Используйте числа 1..127 для пользовательских идентификаторов. Для получения свободного идентификатора используйте функцию [[Основные команды AVR-DOS#FreeFile|FreeFile]](возвращает 128..255)</ref>. Если не указан, то изменения всех открытых файлов сбрасываются на диск.
-or #ff
 |}
 Пример вызова:
-<source lang="vb">$include "startup.inc"
+<source lang="vb"> $include "startup.inc"
 'open the file in BINARY mode
@@ Строка 799: / Строка 74: @@
 Put #2 , L ' write a long
 Ltemp = Loc(#2) + 1 ' get the position of the next byte
-Print Ltemp ; " LOC" ' store the location of the file
+Print Ltemp ; " LOC" ' store the location of the file pointer
-pointer
 Print Lof(#2) ; " length of file"
-Print Fileattr(#2) ; " file mode" ' should be 32 for
+Print Fileattr(#2) ; " file mode" ' should be 32 for binary
-binary
 Put #2 , Sn ' write a single
 Put #2 , Stxt ' write a string
@@ Строка 811: / Строка 82: @@
 Flush #2 ' flush to disk
 Close #2
-</source>
-=== Print ===
-Send output to the RS-232 port. Writes a string to a
-file. You can use a semicolon (;) to print more than one
-variable at one line.
-When you end a line with a semicolon, no linefeed will
-be added. The PRINT routine can be used when you have a
-RS-232 interface on your uP. The RS-232 interface can be
-connected to a serial communication port of your
-computer. This way you can use a terminal emulator as an
-output device. You can also use the build in terminal
-emulator. The AVR-DOS filesystem also supports PRINT.
-But in that case, only strings can be written to disk.
-<code>PRINT var ; " constant" </code>
-{| class="wikitable"
-| Var(...)
-| The variable or constant to print
-|}
-Пример вызова:
-<source lang="vb">Dim A As Byte , B1 As Byte , C As Integer , S As
-String * 4
-A = 1
-Print "print variable a " ; A
-Print 'new line
-Print "Text to print." 'constant to print
-B1 = 10
-Print Hex(b1) 'print in hexa notation
-C = &HA000 'assign value to c%
-Print Hex(c) 'print in hex notation
-Print C 'print in decimal notation
-C = -32000
-Print C
-Print Hex(c)
-Rem Note That Integers Range From -32767 To 32768
-End
-</source>
-=== Write ===
-Writes data to a sequential file. When you write a
-variables value, you do not write the binary
-representatrion but the ASCII representation. When you
-look in a file it contains readable text. When you use
-PUT, to write binary info, the files are not readable or
-contain unreadable characters. Strings written are
-surrounded by string delimeters "". Multiple variables
-written are separated by a comma. Look to this example:
-<source lang="vb">Dim S as String * 10 , W as Word
-S="hello" : W = 100
-OPEN "test.txt" For OUTPUT as #1
-WRITE #1, S , W
-CLOSE #1</source>
-The file content will look like this : "hello",100. Use
-INPUT to read the values from value.
-<code>Write #ch , data [,data1]</code>
-{| class="wikitable"
-| Ch(...)
-| A channel number, which identifies an opened file.
-This can be a hard coded constant or a variable
-|-
-| Data , data1
-| A variable who’s content are written to the file
-|}
-Пример вызова:
-<source lang="vb">Dim S As string * 10 , W As Word ,L As Long
-S = "write"
-Open "write.dmo" For Output As #2
-Write #2 , S , W , L ' write is also supported
-Close #2
-Open "write.dmo" For Input As #2
-Input #2 , S , W , L ' write is also supported
-Close #2
-Print S ; " " ; W ; " " ; L
-</source>
-=== Input ===
-Read a Line from an opened File. Only valid for files
-opened in mode INPUT. Line INPUT works only with
-strings. It is great for working on text files.
-<code>LineInput #bFileNumber, sLineText</code>
-{| class="wikitable"
-| BfileNumber(Byte)
-| Filenumber, which identifies an opened file
-|-
-| SlineText(String)
-| A string, which is assigned with the next line from
-the file
-|}
-Пример вызова:
-<source lang="vb">'Ok we want to check if the file contains the
-written lines
-Ff = Freefile() ' get file handle
-Open "test.txt" For Input As #ff ' we can use a constant
-for the file too
-Print Lof(#ff) ; " length of file"
-Print Fileattr(#ff) ; " file mode" ' should be 1 for
-input
-Do
-Line Input #ff , S ' read a line
-' line input is used to read a line of text from a file
-Print S ' print on terminal emulator
-Loop Until Eof(ff) <> 0
-'The EOF() function returns a non-zero number when the
-end of the file is reached
-'This way we know that there is no more data we can read
-Close #ff
-</source>
-=== Line Input ===
-Read a Line from an opened File. Only valid for files
-opened in mode INPUT. Line INPUT works only with
-strings. It is great for working on text files.
-<code>LineInput #bFileNumber, sLineText</code>
-{| class="wikitable"
-| BfileNumber(Byte)
-| Filenumber, which identifies an opened file
-|-
-| SlineText(String)
-| A string, which is assigned with the next line from
-the file.
-|}
-Пример вызова:
-<source lang="vb">'Ok we want to check if the file contains the
-written lines
-Ff = Freefile() ' get file handle
-Open "test.txt" For Input As #ff ' we can use a constant
-for the file too
-Print Lof(#ff) ; " length of file"
-Print Fileattr(#ff) ; " file mode" ' should be 1 for
-input
-Do
-Line Input #ff , S ' read a line
-' line input is used to read a line of text from a file
-Print S ' print on terminal emulator
-Loop Until Eof(ff) <> 0
-'The EOF() function returns a non-zero number when the
-end of the file is reached
-'This way we know that there is no more data we can read
-Close #ff
 </source>
 === Get ===
-Reads a byte from the hardware or software UART. Reads
+Reads a byte from the hardware or software UART. Reads data from a file opened in BINARY mode.
-data from a file opened in BINARY mode.
-GET in combination with the software/hardware UART is
+GET in combination with the software/hardware UART is provided for compatibility with BASCOM-8051. It reads one byte.
+GET in combination with the AVR-DOS filesystem is very flexible and versatile. It works on files opened in BINARY mode and you can reads all data types.
-provided for compatibility with BASCOM-8051. It reads
+By default you only need to provide the variable name. When the variable is a byte, 1 byte wil be read. When the variable is a word or integer, 2 bytes will be read. When the variable is a long or single, 4 bytes will be read. When the variable is a string, the number of bytes that will be read is equal to the dimensioned size of the string. DIM S as string * 10 , would read 10 bytes.
+Note that when you specify the length for a string, the maximum length is 255. The maximum length for a non-string array is 65535.
-one byte.
+<source lang="vb"> Example :
-GET in combination with the AVR-DOS filesystem is very
+GET #1 , var ,,2 ‘ read 2 bytes, start at current position
-flexible and versatile. It works on files opened in
-BINARY mode and you can reads all data types.
-By default you only need to provide the variable name.
-When the variable is a byte, 1 byte wil be read. When
-the variable is a word or integer, 2 bytes will be read.
-When the variable is a long or single, 4 bytes will be
-read. When the variable is a string, the number of bytes
-that will be read is equal to the dimensioned size of
-the string. DIM S as string * 10 , would read 10 bytes.
-Note that when you specify the length for a string, the
-maximum length is 255. The maximum length for a
-non-string array is 65535.
-<source lang="vb">Example :
-GET #1 , var ,,2 ‘ read 2 bytes, start at current
-position
 GET #1, var , PS ‘ start at position stored in long PS
-GET #1, var , PS, 2 ‘ start at position stored in long
+GET #1, var , PS, 2 ‘ start at position stored in long PS and read 2 bytes</source>
-PS and read 2 bytes</source>
 <code>GET #channel, var</code>
@@ Строка 1052: / Строка 102: @@
 {| class="wikitable"
 | #channel(...)
-| A channel number, which identifies an opened file.
+| A channel number, which identifies an opened file. This can be a hard coded constant or a variable
-This can be a hard coded constant or a variable
 |-
 | Var(...)
-| The variable or variable array that will be assigned
+| The variable or variable array that will be assigned with the data from the file
-with the data from the file
 |-
 | Pos(...)
-| This is an optional parameter that may be used to
+| This is an optional parameter that may be used to specify the postion where the reading must start from. This must be a long variable
-specify the postion where the reading must start from.
-This must be a long variable
 |-
 | Length(...)
-| This is an optional parameter that may be used to
+| This is an optional parameter that may be used to specify how many bytes must be read from the file.
-specify how many bytes must be read from the file.
 |}
 Пример вызова:
-<source lang="vb">'for the binary file demo we need some variables of
+<source lang="vb"> 'for the binary file demo we need some variables of different types
+Dim B As Byte , W As Word , L As Long , Sn As Single , Ltemp As Long
-different types
-Dim B As Byte , W As Word , L As Long , Sn As Single ,
-Ltemp As Long
 Dim Stxt As String * 10
-B = 1 : W = 50000 : L = 12345678 : Sn = 123.45 : Stxt =
+B = 1 : W = 50000 : L = 12345678 : Sn = 123.45 : Stxt = "test"
-"test"
 'open the file in BINARY mode
@@ Строка 1093: / Строка 127: @@
 Put #2 , L ' write a long
 Ltemp = Loc(#2) + 1 ' get the position of the next byte
-Print Ltemp ; " LOC" ' store the location of the file
+Print Ltemp ; " LOC" ' store the location of the file pointer
-pointer
 Print Seek(#2) ; " = LOC+1"
 Print Lof(#2) ; " length of file"
-Print Fileattr(#2) ; " file mode" ' should be 32 for
+Print Fileattr(#2) ; " file mode" ' should be 32 for binary
-binary
 Put #2 , Sn ' write a single
 Put #2 , Stxt ' write a string
@@ Строка 1121: / Строка 151: @@
 === Put ===
-Writes a byte to the hardware or software UART. Writes
+Writes a byte to the hardware or software UART. Writes data to a file opened in BINARY mode.
-data to a file opened in BINARY mode.
-PUT in combination with the software/hardware UART is
-provided for compatibility with BASCOM-8051. It writes
-one byte
-PUT in combination with the AVR-DOS filesystem is very
-flexible and versatile. It works on files opened in
-BINARY mode and you can write all data types.
-By default you only need to provide the variable name.
-When the variable is a byte, 1 byte wil be written. When
-the variable is a word or integer, 2 bytes will be
-written. When the variable is a long or single, 4 bytes
-will be written. When the variable is a string, the
-number of bytes that will be written is equal to the
-dimensioned size of the string. DIM S as string * 10 ,
+PUT in combination with the software/hardware UART is provided for compatibility with BASCOM-8051. It writes one byte
+PUT in combination with the AVR-DOS filesystem is very flexible and versatile. It works on files opened in BINARY mode and you can write all data types.
-would write 10 bytes.
+By default you only need to provide the variable name. When the variable is a byte, 1 byte wil be written. When the variable is a word or integer, 2 bytes will be written. When the variable is a long or single, 4 bytes will be written. When the variable is a string, the number of bytes that will be written is equal to the dimensioned size of the string. DIM S as string * 10 , would write 10 bytes.
-Note that when you specify the length for a string, the
+Note that when you specify the length for a string, the maximum length is 255. The maximum length for a non-string array is 65535.
-maximum length is 255. The maximum length for a
-non-string array is 65535.
 Example:
-<source lang="vb">PUT #1, var
+<source lang="vb"> PUT #1, var
 PUT #1, var , , 2 ‘ write 2 bytes at default position
-PUT #1, var ,PS, 2 ‘ write 2 bytes at location storied
+PUT #1, var ,PS, 2 ‘ write 2 bytes at location storied in variable PS</source>
-in variable PS</source>
 <code>PUT #channel, var</code>
@@ Строка 1170: / Строка 168: @@
 {| class="wikitable"
 | #channel(...)
-| A channel number, which identifies an opened file.
+| A channel number, which identifies an opened file. This can be a hard coded constant or a variable.
-This can be a hard coded constant or a variable.
 |-
 | Var(...)
-| The variable or variable array that will be written to
+| The variable or variable array that will be written to the file
-the file
 |-
 | Pos(...)
-| This is an optional parameter that may be used to
+| This is an optional parameter that may be used to specify the postion where the data must be written to. This must be a long variable.
-specify the postion where the data must be written to.
-This must be a long variable.
 |-
 | Length(...)
-| This is an optional parameter that may be used to
+| This is an optional parameter that may be used to specify how many bytes must be written to the file.
-specify how many bytes must be written to the file.
 |}
 Пример вызова:
-<source lang="vb">'for the binary file demo we need some variables of
+<source lang="vb"> 'for the binary file demo we need some variables of different types
+Dim B As Byte , W As Word , L As Long , Sn As Single , Ltemp As Long
-different types
-Dim B As Byte , W As Word , L As Long , Sn As Single ,
-Ltemp As Long
 Dim Stxt As String * 10
-B = 1 : W = 50000 : L = 12345678 : Sn = 123.45 : Stxt =
+B = 1 : W = 50000 : L = 12345678 : Sn = 123.45 : Stxt = "test"
-"test"
 'open the file in BINARY mode
@@ Строка 1211: / Строка 193: @@
 Put #2 , L ' write a long
 Ltemp = Loc(#2) + 1 ' get the position of the next byte
-Print Ltemp ; " LOC" ' store the location of the file
+Print Ltemp ; " LOC" ' store the location of the file pointer
-pointer
 Print Seek(#2) ; " = LOC+1"
 Print Lof(#2) ; " length of file"
-Print Fileattr(#2) ; " file mode" ' should be 32 for
+Print Fileattr(#2) ; " file mode" ' should be 32 for binary
-binary
 Put #2 , Sn ' write a single
 Put #2 , Stxt ' write a string
@@ Строка 1239: / Строка 217: @@
 === Seek ===
-Function: Returns the position of the next Byte to be
+Function: Returns the position of the next Byte to be read or written.
+Statement: Sets the position of the next Byte to be read or written.
-read or written.
-Statement: Sets the position of the next Byte to be read
-or written.
+This function returns the position of the next Byte to be read or written. If an error occures, 0 is returned. Check DOS-Error in variable gbDOSError<ref name="OkrDOS">[[Окружение AVR-DOS#Коды ошибок|Коды ошибок]]</ref>..
+The statetement also returns an error in the gbDOSerror variable in the event that an error occurs.
-This function returns the position of the next Byte to
+You can for example not set the fileposition behinds the filesize.
+In QB/VB the file is filled with 0 bytes when you set the filepointer behind the size of the file. For embedded systems this does not seem a good idea.
-be read or written. If an error occures, 0 is returned.
+Seek and Loc seems to do the same function, but take care : the seek function will return the position of the next read/write, while the Loc function returns the position of the last read/write. You may say that Seek = Loc+1.
-Check DOS-Error in variable gbDOSError<ref
-name="OkrDOS">Подробнее [[Окружение AVR-DOS]]</ref>.
-The statetement also returns an error in the gbDOSerror
-variable in the event that an error occurs.
-You can for example not set the fileposition behinds the
-filesize.
-In QB/VB the file is filled with 0 bytes when you set
-the filepointer behind the size of the file. For
-embedded systems this does not seem a good idea.
-Seek and Loc seems to do the same function, but take
-care : the seek function will return the position of the
-next read/write, while the Loc function returns the
-position of the last read/write. You may say that Seek =
-Loc+1.
 '''Difference with QB'''
-In QB/VB you can use seek to make the file bigger. When
+In QB/VB you can use seek to make the file bigger. When a file is 100 bytes long, setting the filepointer to 200 will increase the file with 0 bytes. By design this is not the case in AVR-DOS.
-a file is 100 bytes long, setting the filepointer to 200
-will increase the file with 0 bytes. By design this is
-not the case in AVR-DOS.
 <code>Function: NextReadWrite = Seek (#bFileNumber)
@@ Строка 1291: / Строка 237: @@
 |-
 | NextReadWrite(Long)
-| A Long Variable, which is assigned with the Position
+| A Long Variable, which is assigned with the Position of the next Byte to be read or written (1-based)
-of the next Byte to be read or written (1-based)
 |-
 | NewPos(Long)
-| A Long variable that holds the new position the
+| A Long variable that holds the new position the filepointer must be set too.
-filepointer must be set too.
 |}
 Пример вызова:
-<source lang="vb">Open "test.biN" For Binary As #2
+<source lang="vb"> Open "test.biN" For Binary As #2
 Put #2 , B ' write a byte
 Put #2 , W ' write a word
 Put #2 , L ' write a long
 Ltemp = Loc(#2) + 1 ' get the position of the next byte
-Print Ltemp ; " LOC" ' store the location of the file
+Print Ltemp ; " LOC" ' store the location of the file pointer
-pointer
 Print Seek(#2) ; " = LOC+1"
@@ Строка 1318: / Строка 258: @@
 Open "test.bin" For Binary As #2
 Seek #2 , Ltemp ' set the filepointer
-Sn = 1.23 ' change the single value so we can check it
+Sn = 1.23 ' change the single value so we can check it better
-better
 Put #2 , Sn = 1 'specify the file position
 Close #2
@@ Строка 1326: / Строка 264: @@
 == Свойства файла ==
-=== EOF ===
-Returns the End of File Status.
-This functions returns information about the End of File
-Status.
-{| class="wikitable"
-! Return value
-! Status
-|-
-| 0
-| NOT EOF
-|-
-| 255
-| EOF
-|}
-In case of error (invalid filenumber) 255 (EOF) is
-returned too.
-<code>bFileEOFStatus = EOF(#bFileNumber)</code>
-{| class="wikitable"
-| bFileEOFStatus(Byte)
-| A Byte Variable, which issigned with the EOF Status
-|-
-| bFileNumber(Byte)
-| Number of the opened file
-|}
-Пример вызова:
-<source lang="vb">Ff = Freefile() ' get file handle
-Open "test.txt" For Input As #ff ' we can use a constant
-for the file too
-Print Lof(#ff) ; " length of file"
-Print Fileattr(#ff) ; " file mode" ' should be 1 for
-input
-Do
-Line Input #ff , S ' read a line
-' line input is used to read a line of text from a file
-Print S ' print on terminal emulator
-Loop Until Eof(ff) <> 0
-'The EOF() function returns a non-zero number when the
-end of the file is reached
-'This way we know that there is no more data we can read
-Close #ff
-</source>
 === LOC ===
-Returns the position of last read or written Byte of the
+Returns the position of last read or written Byte of the file.
-file.
-This function returns the position of the last read or
+This function returns the position of the last read or written Byte. If an error occurs, 0 is returned. Check DOS-Error in variable gbDOSError<ref name="OkrDOS">[[Окружение AVR-DOS#Коды ошибок|Коды ошибок]]</ref>.. If the file position pointer is changed with the command SEEK, this function can not be used till the next read/write operation.
-written Byte. If an error occurs, 0 is returned. Check
-DOS-Error in variable gbDOSError<ref
-name="OkrDOS">Подробнее [[Окружение AVR-DOS]]</ref>. If
-the file position pointer is changed with the command
-SEEK, this function can not be used till the next
-read/write operation.
 '''Difference with QB'''
-This function differs from QB. In QB the byte position
+This function differs from QB. In QB the byte position is divided by 128.
-is divided by 128.
 <code>lLastReadWritten = Loc (#bFileNumber)</code>
@@ Строка 1409: / Строка 278: @@
 |-
 | lLastReadWritten(Long)
-| Variable, whichsigned with the Position of last read
+| Variable, whichsigned with the Position of last read or written Byte (1-based)
-or written Byte (1-based)
 |}
 Пример вызова:
-<source lang="vb">'open the file in BINARY mode
+<source lang="vb"> 'open the file in BINARY mode
 Open "test.biN" For Binary As #2
 Put #2 , B ' write a byte
@@ Строка 1422: / Строка 289: @@
 Put #2 , L ' write a long
 Ltemp = Loc(#2) + 1 ' get the position of the next byte
-Print Ltemp ; " LOC" ' store the location of the file
+Print Ltemp ; " LOC" ' store the location of the file pointer
-pointer
 Print Lof(#2) ; " length of file"
-Print Fileattr(#2) ; " file mode" ' should be 32 for
+Print Fileattr(#2) ; " file mode" ' should be 32 for binary
-binary
-Put #2 , Sn ' write a single
-Put #2 , Stxt ' write a string
-Flush #2 ' flush to disk
-Close #2
-</source>
-=== LOF ===
-Returns the length of the File in Bytes.
-This function returns the length of an opened file. If
-an error occures, 0 is returned. Check DOS-Error in
-variable gbDOSError<ref name="OkrDOS">Подробнее
-[[Окружение AVR-DOS]]</ref>.
-<code>lFileLength = LOF (#bFileNumber)</code>
-{| class="wikitable"
-| bFileNumber(Byte)
-| Filenumber, which identifies an opened file
-|-
-| LFileLength(Long)
-| Variable, which issigned with the Length of the file
-(1-based)
-|}
-Пример вызова:
-<source lang="vb">'open the file in BINARY mode
-Open "test.biN" For Binary As #2
-Put #2 , B ' write a byte
-Put #2 , W ' write a word
-Put #2 , L ' write a long
-Ltemp = Loc(#2) + 1 ' get the position of the next byte
-Print Ltemp ; " LOC" ' store the location of the file
-pointer
-Print Lof(#2) ; " length of file"
-Print Fileattr(#2) ; " file mode" ' should be 32 for
-binary
 Put #2 , Sn ' write a single
 Put #2 , Stxt ' write a string
@@ Строка 1482: / Строка 300: @@
 === FileAttr ===
-Returns the file open mode.
+Возвращает [[Окружение AVR-DOS#Использование команд ввода-вывода в различных режимах|режим открытия]] файлового потока.
-This functions returns information about the File open
-mode
 <code>bFileAttribut = FileAttr (bFileNumber)</code>
-{| class="wikitable"
-|-
-! Return value
-! Open mode
-|-
-| 1
-| INPUT
-|-
-| 2
-| OUTPUT
-|-
-| 8
-| APPEND
-|-
-| 32
-| BINARY
-|}
 {| class="wikitable"
 | bFileAttribut(Long)
-| File open mode, See table
+| Режим:
+'''1''' - INPUT<br/>
+'''2''' - OUTPUT<br/>
+'''8''' - APPEND<br/>
+'''32''' - BINARY
 |-
 | bFileNumber(Byte)
-| Number of the opened file
+| Идентификационный номер открытого файлового потока<ref name="identnumber">Принадлежит целому множеству 0..255, может быть переменной или константой. Используйте числа 1..127 для пользовательских идентификаторов. Для получения свободного идентификатора используйте функцию [[#FreeFile|FreeFile]](возвращает 128..255)</ref>
 |}
 Пример вызова:
-<source lang="vb">'open the file in BINARY mode
+<source lang="vb"> 'open the file in BINARY mode
 Open "test.biN" For Binary As #2
-Print Fileattr(#2) ; " file mode" ' should be 32 for
+Print Fileattr(#2) ; " file mode" ' should be 32 for binary
-binary
 Put #2 , Sn ' write a single
 Put #2 , Stxt ' write a string
@@ Строка 1533: / Строка 330: @@
 Writes the Content of a File into SRAM.
-This function writes the content of a file to a desired
+This function writes the content of a file to a desired space in SRAM. A free handle is needed for this function.
-space in SRAM. A free handle is needed for this
-function.
 <code>BLoad sFileName, wSRAMPointer</code>
@@ Строка 1546: / Строка 339: @@
 |-
 | wSRAMPointer(Word)
-| Variable, which holds the SRAM Address to which the
+| Variable, which holds the SRAM Address to which the content of the file should be written
-content of the file should be written
 |}
 Пример вызова:
-<source lang="vb">'now the good old bsave and bload
+<source lang="vb"> 'now the good old bsave and bload
 Dim Ar(100) As Byte , I As Byte
 For I = 1 To 100
@@ Строка 1578: / Строка 369: @@
 Save a range in SRAM to a Fileю
-This function writes a range from the SRAM to a file. A
+This function writes a range from the SRAM to a file. A free file handle is needed for this function.
-free file handle is needed for this function.
 <code>BSave sFileName, wSRAMPointer, wLength</code>
@@ Строка 1589: / Строка 378: @@
 |-
 | wSRAMPointer(Word)
-| Variable, which holds the SRAM Address, from where
+| Variable, which holds the SRAM Address, from where SRAM should be written to a File
-SRAM should be written to a File
 |-
 | wLength(Word)
-| Count of Bytes from SRAM, which should be written to
+| Count of Bytes from SRAM, which should be written to the file
-the file
 |}
@@ Строка 1628: / Строка 413: @@
 == См. также ==
 * [[AVR-DOS]]
+* [[Основные команды AVR-DOS]]