SimTech SimCom SIM800 Series Istruzioni per l'installazione e il funzionamento
SIM800 Series_Software Upgrade
_Application Note_V1.02
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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.
Copyright
Copyright © Shanghai SIMCom Wireless Solutions Ltd. 2014
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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.
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