kndrio / mt333x-fw-utils

Tools for updating and dumping firmware from GPS receivers utilizing the MT3333 or MT3339 chipset

MT333x GPS receiver firmware tools

These tools can be used for updating and dumping firmware to/from GPS receivers utilizing the MT3333 or MT3339 chipset.

• mt333x_fw_dump.py: Dump the current firmware from a GPS device to file
• mt333x_fw_update.py: Load a new firmware into a GPS device
• mt333x_fw_file_info.py: Dispays the customization settings of a MT333x firmware file

The tools currently only work with Python 2.x.

Note: Most of the tools are written based on observing and trial-and-error. Especially for mt333x_fw_file_info.py there is no guarantee that the information is correct.

Note2: These tools aren't production ready code. They are more ment as example code for people who want to build upon it.

Firmware updates + MTK download agent

To be able to update the firmware you need a MTK download agent. These are part of the 'GlobalTop FlashTool'. Make sure you use the correct download agent for your device.

Example filenames of download agents:

• MTK_AllInOne_DA_MT3318_v4.01.bin (md5: 7e6bd13492293cf1efb4e8b25caa8c80)
• MTK_AllInOne_DA_MT3329_v4.02.bin (md5: 52724a12c7186bdede40ce65e0d81c5e)
• MTK_AllInOne_DA_MT3333_MP.BIN (md5: 028a2c42d1e39623c8aa148d8a0e6709)
• MTK_AllInOne_DA_MT3339_E3.bin (md5: 973d91e32b1cc37a332bfc9e235bc372)

Firmware file names

The firmware files from GlobalTop follow a strict nameing scheme. For example:

AXN3.20_8033_3333_96.1151100.1.bin

• AXN: Fixed Prefix
• 3.20: Firmware Version
• 8033: Build number
• 3333: Target chipset, in this case MTK3333
• 96: Baud rate / 100, in this case 9600 Baud
• 1151100: NMEA sentence rate: { GGA, GSA, GSV, RMC, VTG, ?GLL?, ?ZDA? }
• 1: Update rate, ie. 1 Hz

Note: NMEA sentence rate can be 10. This gives a rather hard to decode filename like: AXN2.31_5657_3339_1152.101010101000.10.bin