SimTech SimCom SIM800 Series Instructions d'installation et d'utilisation

SIM800 Series_Software Upgrade

_Application Note_V1.02

This document contains proprietary technical information which is the property of SIMCom

Limited., copying of this document and giving it to others and the using or communication of the

contents thereof, are forbidden without express authority. Offenders are liable to the payment of

or design. All specification supplied herein are subject to change without notice at any time.

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Document Title: SIM800 Series_Software Upgrade_Application Note

Version: 1.02

Date: 2014-06-30

Status: Release

Document Control ID: SIM800 Series_Software Upgrade_Application Note_V1.02.doc

General Notes

SIMCom offers this information as a service to its customers, to support application and

engineering efforts that use the products designed by SIMCom. The information provided is based

upon requirements specifically provided to SIMCom by the customers. SIMCom has not

undertaken any independent search for additional relevant information, including any information

that may be in the customer’s possession. Furthermore, system validation of this product designed

by SIMCom within a larger electronic system remains the responsibility of the customer or the

customer’s system integrator. All specifications supplied herein are subject to change.

SIM800 Series_Software Upgrade_Application Note_V1.02 2014-06-30

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Contents

1Upgrade Process..................................................................................6

1.1 Start Upgrade Process...................................................................................6

1.2 Synchronization Word Detection（0xB5）.................................................7

1.3 Send Head Information (0x01/0x81)............................................................7

1.4 Upgrade ROM_VIVA File to the Module (0x03).........................................8

1.5 Command Summary.....................................................................................8

2Linux Source Code............................................................................10

2.1 Compile the Source Code on Linux System...............................................10

2.2 Run on the Linux System...........................................................................10

2.3 Command Line Parameters........................................................................10

Appendix..................................................................................................11

A Related Documents ......................................................................................11

B Terms and Abbreviations..............................................................................11

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Figure 1: Upgrade process ........................................................................................................6

Figure 2：Waiting for synchronization word ...........................................................................7

Figure 3：Synchronization word detection ..............................................................................7

Figure 4：Send head information.............................................................................................8

Figure 5：Upgrade ROM_VIVA file........................................................................................8

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Version History

Date Version Description of change Author

2013-09-02 V1.00 New version Yanhai.cheng

2013-09-04 V1.01 SIM800 Series Upgrade protocol and picture change Yanhai.cheng

2014-06-30 V1.02 Change Linux Command parameter redefine Yanhai.cheng

Scope

This manual mainly describes how to use the PC or external MCU to upgrade software of SIM800

series modules by serial port. This document can apply to SIM800 series modules, including

SIM800L, SIM800H, SIM800, SIM800-WB64, SIM800G and SIM808.

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1Upgrade Process

This chapter introduces software upgrade process of SIM800 series modules. The picture below

illustrates this upgrade process: Every time when module is powered on, it will start from the

BOOT ROM. The following picture shows the upgrade process:

Figure 1: Upgrade process

1.1 Start Upgrade Process

1) Make sure the power supply of module is OK and module serial port is connected to the

MAIN port.

2) Reset module, it will start from the BOOT ROM.

The serial port of the module must be set as follows:

115200bps, 8 bit, No parity bit, 1 stop bit, no flow control.

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1.2 Synchronization Word Detection（0xB5）

When the module Bootloader program starts, if it receives the 0xb5 byte synchronization word

within 100 ms, it will reply with a 0x5b byte word then the module go into the upgrade mode.

Within 100 ms, if the module does not receive 0xb5 synchronization word, the module will enter

normal mode.

Note: in order to ensure the module receive synchronization byte 0xb5, send the bytes within 100

ms after power on.

Figure 2：Waiting for synchronization word

Figure 3：Synchronization word detection

1.3 Send Head Information (0x01/0x81)

Command word 0x01 means there is no need to erase the file system of the module, while 0x81

means it needs to erase the file system of the module, Data head contains 128-byte information

that included in the front part of upgrade file.

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To upgrade ROM_VIVA file to the module, the frame should include four parts: the frame head

(0x03), 4-bytes data frame length (maximum length is no more than 512 bytes), data fields and

4-bytes data checksum. Checksum calculation method is as following: add all data bytes of the

number, the value of last 4 bytes of the number is the checksum.

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Figure 4：Send head information

1.4 Upgrade ROM_VIVAFile to the Module (0x03)

The frame format is as follows:

CMD Frame Length Data Field Checksum

0x03 4bytes，Low byte in the front data frame 4bytes，Low byte in the front

Figure 5：Upgrade ROM_VIVA file

1.5 Command Summary

CMD Description Direction

0xB5 Sync byte PC->MODULE

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0x5B Sync byte confirm MODULE->PC

0x01/0x81 Send head information PC->MODULE

0x02 Head information confirm MODULE->PC

0x03 Send Upgrade data PC->MODULE

0x04 Upgrade data confirm MODULE->PC

‘P’ Write flash fail MODULE->PC

‘C’ Checksum error MODULE->PC

‘R’ Erasing MODULE->PC

‘E’ Erase error MODULE->PC

‘S’ File size error MODULE->PC

0x07 reset module PC->MODULE

0x08 Reset module confirm MODULE ->PC

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2Linux Source Code

SIMCom offers SIM800 upgrade Linux source code mtkdownload, as well as the binaries

compiled by Ubuntu 11.10 64 - bit system. Customer can run it directly under this system, in other

Linux systems, or client MCU system, users need to recompile the source code and run their own

code.

2.1 Compile the Source Code on Linux System

Run the following commands to complete the compiler directly.

gcc -o mtkdownload mtkdownload.c

2.2 Run on the Linux System

Run the following commands directly.

./mtkdownload <com> ROM_VIVA <format>

2.3 Command Line Parameters

<com>:/dev/ttyS0,/dev/ttyS1,/dev/ttyS2,/dev/ttyS3,/dev/ttyUSB0

Represent the:COM1,COM2,COM3,COM4 and the USB serial port

ROM_VIVA filename to upgrade

< format > parameter Y or N

Indicate whether or not format file system.

for example：

./mtkdownload /dev/ttyUSB0 ROM_VIVA Y

Indicate to upgrade SIM800 ROM_VIVA file, and format the file system by the USB serial

port.

SIM800 Series_Software Upgrade_Application Note_V1.02 2014-06-30

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