Imported from GitHub: multilan-tarek/am29f400b-arduino-flasher · commit ae08d3d · license GPL-3.0

Description

AMD Am29F400B Arduino MEGA Flasher

README

Am29F400B Arduino Flasher

This is a script for reading, erasing and writing the AMD Am29F400B flash memory chips using an Arduino MEGA.
These chips were used in many ECUs, TCUs and other kinds of control units in combination with the CR167 CPU from Siemens/Infineon.

Supported Chips

Am29F400BT                  | Top Boot Sector
Am29F400BB                  | Bottom Boot Sector

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Software

The PC side script needs to be executed using Python 3 in a shell. (https://www.python.org/downloads/)

Flash the arduino.ino to an Arduino MEGA.

Available Commands

-r <file>                   | Read full
-r <file> <start> <size>    | Read partial
-r <file> <sector>          | Read sector
-w <file>                   | Write full
-w <file> <start> <size>    | Write partial (without erasing)
-w <file> <sector>          | Write sector
-e                          | Erase full
-e <sector>                 | Erase sector
-v                          | Prints sector protection states

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Reading

Read all 512KB of data:

python3 main.py -r dump.bin

Read only data in a specific sector (e.g. SA1, see table below):

python3 main.py -r dump.bin 1

Read only a specific range (e.g. address 0x10, size 0x200, decimal and hex possible):

python3 main.py -r dump.bin 1 0x10 0x200

python3 main.py -r dump.bin 1 16 512

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Writing

Write to all 512KB of available space:

python3 main.py -w new_data.bin

Write only to a specific sector (e.g. SA3, see table below):

python3 main.py -w new_data.bin 3

Write only to a specific range (e.g. address 0x20, size 0x100, decimal and hex possible):

python3 main.py -r new_data.bin 1 0x20 0x00

python3 main.py -r new_data.bin 1 32 256

Attention:
Writing to a specific range will not erase the data beforehand, because it is only possible to erase a whole sector.
So this only works if the bits you want to change are 1.
You can only change bits back from 0 to 1 with erasing.

Also, any writing can only be done if the sector is unprotected.
Check the sector protection states using the -v command.

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Erasing

Erase all sectors (SA0 - SA10)

python3 main.py -e

Erase only a specific sector (e.g. SA5, see table below)

python3 main.py -e 5

Attention:
Erasing can only be done if the sector is unprotected.
Check the sector protection states using the -v command.

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Hardware

Included is a simple PCB that adapts the 36 pin connector of the Arduino MEGA to the SO44 footprint.
Use a 1206 1kΩ resistor to pull up the RY/BY# signal. (only needed for erasing and writing)

The gerber file is ready for ordering at JLCPCB.

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Sector Layouts

The chip is seperated into 11 sectors.
Sizes and addresses of these sectors are dependent on the variant.
Hardware and software is designed to operate in byte mode.
Values would differ in word mode.

Am29F400BT

Sector	Address	Size
SA0	0x00000	0x10000
SA1	0x10000	0x10000
SA2	0x20000	0x10000
SA3	0x30000	0x10000
SA4	0x40000	0x10000
SA5	0x50000	0x10000
SA6	0x60000	0x10000
SA7	0x70000	0x8000
SA8	0x78000	0x2000
SA9	0x7a000	0x2000
SA10	0x7c000	0x4000

Am29F400BB

Sector	Address	Size
SA0	0x00000	0x4000
SA1	0x04000	0x2000
SA2	0x06000	0x2000
SA3	0x08000	0x8000
SA4	0x10000	0x10000
SA5	0x20000	0x10000
SA6	0x30000	0x10000
SA7	0x40000	0x10000
SA8	0x50000	0x10000
SA9	0x60000	0x10000
SA10	0x70000	0x10000