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Open AT ^® Release version:
3.13

Sample - External Storage

Changes
Dependencies
Application Description

Changes

V3.00 : Initial revision

Dependencies

This sample depends on the following libraries :

MultiApp
This MultiApp sample library provides start/stop mechanism to handle several running ADL applications.
Drivers
This Drivers sample ADL Library allows applications to use directly some specefic devices, plugged on SPI, I2C or Parallel bus.

Application Description

This application uses the M93CX6 driver to access an external E2P chip.

As this application uses the MultiApp library, the following start/stop command has to be used to control the application execution.

AT+EXTSTART (External Storage start/stop command)

Command	Answers
AT+EXTSTART?	+EXTSTART: <state> OK
AT+EXTSTART=?	+EXTSTART: (0-1) OK
AT+EXTSTART= <state>	+CME ERROR: 3 or OK

Parameter	Values range	Description	Default value
state	0-1	The current application running state. This parameter is stored in non-volatile memory.	0

The init entry point sent to the MultiApp library is the es_init() function. The start/stop entry points linked to the +EXTSTART command are the es_start() and es_stop() functions.

The application uses the Drivers library to store and read bytes in/from a M93CX6 chip. It provides two AT commands, for each write and read process.

AT+WRITE (External E2P write command)

Command	Answers
AT+WRITE=?	+WRITE: (0-127) , (0-255) OK
AT+WRITE= <address> , <byte>	+CME ERROR: 3 or OK

Parameter	Values range	Description	Default value
address	0-127	Data address of the byte to store	mandatory
byte	0-255	Byte to write (decimal format)	mandatory

AT+READ (External E2P read command)

Command	Answers
AT+READ=?	+READ: (0-127) OK
AT+READ= <address>	+CME ERROR: 3 or +READ: <byte> OK

Parameter	Values range	Description	Default value
address	0-127	Data address of the byte to read	mandatory
byte	0-255	Byte read (decimal format)	NA

Updated: Wed Apr 4 13:11:57 CEST 2007;