ALFAT-OM-337 GHI Electronics, ALFAT-OM-337 Datasheet - Page 27

• Manufacturer Part Number: ALFAT-OM-337
• Description: Memory IC Development Tools ALFAT USB / SD to UART / SPI OEM BOARD
• Manufacturer: GHI Electronics

Specifications of ALFAT-OM-337

• Rohs: yes
• Product: SD OEM Board
• Tool Is For Evaluation Of: SD, SDHC, MMC Cards, USB drives
• Memory Type: Flash
• Operating Supply Voltage: 3.3 V
• Description/function: OEM board offers a seamless way to access files on SD & MMC cards and on USB memory drives
• Interface Type: I2C, SPI, UART, USB
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Part # Aliases: GHI-ALFAT-OM-337

GHI Electronics
Rev. 1.13
O - Open File for Read, Write or Append
The command requires a free file handle and a access mode.
Open Modes are:
ALFAT has 16 available file handles. Each file, once opened, must be associated with a
handle. Closing the file, would free up the file handle.
Note 1: ALFAT can access unlimited number of files. The limitation is 16 simultaneous
opened files but a handle can be closed then used to open any other file.
Note 2: I Initialize command should be called to initialize and mount the file system. Any
other file-related commands including O command will fail if this was not called first.
Format
Example O
●
●
●
'R’ Open for read, requires the file to exist at the specified path.
‘W’ Open for write, will create a new file and give write privileges to it. If the file
already exists, it will be erased and re-written.
‘A’ Open for append, will write data to the end of the file. If the file does not exist,
it will be created.
O
!00
LOG
!00
O
.LOG
!00
<SP>
<SP>
<SP>
<LF>
<LF>
<LF>
<LF>
<LF>
nM>full path
1R>M:\TEST\VOLTAGE.
0W>U0:\DAT\CURRENT
<LF>
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Open file file name followed full path
and associate it with handle n and
access mode M.
n is the handle number, in HEX, and
can be 0, 1, 2,3,4,5,6, 7, 8, 9, A, B, C,
D, E or F.
M can be R, W or A
Open file VOLTAGE.LOG with file
handle 1 and read access mode. This
file is located in TEST older on SD
memory card.
Open file CURRENT.LOG using file
handle 0 and write access mode on
USB0. If folder DAT is not available, it
will be created automatically.
ALFAT SoC Processor
ALFAT Command Set
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