ROM reader

Fiat Lancia Tester \ Alfa Romeo Tester \ Check Up 1 module reader

Dedicated module reader for FLT\ART\CU-1 ROMs archiving.

Contact : trwgQ {leechers not welcome} 26 {remove spaces} xxx {remove spaces} {at} proton {dot} me

Disclaimer

I do not consent to the use of all or part of the project for commercial purposes!

Nie wyrażam zgody na wykorzystanie całości bądź części projektu w celach zarobkowych!

License

Shield:

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Directories organization

• firmware - MCU firmware, written in C.
• pc_software - PC software, written in Python.
• PCB - Reader PCB project, designed in KiCad.
• ADAPTERS - Adapter PCB projects, designed in KiCad.
• DS - data sheets of used components

Usage

For example:

where /dev/wchusbserial300 (on macOS), /dev/ttyUSB0 (on Linux) or COM1 (on Windows) should be actual serial port name of connected ROM reader.

Basic instructions

1. (optional step) search_ports script can be used to identify ROM reader serial port name.

The ROM reader uses the CH340 serial chip, which can be identified by the VID/PID values of 1A86/7523, respectively.

2. Connect the ROM reader to the PC. Running the program on a PC without a connected module will result in an error.

3. If a module is connected, the reader detects which ROMs are present in the connected module. In this example, we have a module with all three (ROM A, B, and C). If at least one ROM is installed (which will always be the case, since ROM B must be present), the program will prompt you to enter a prefix for the files that will be saved on the PC. I entered M99A_IT as an example. After confirming by pressing Enter, the ROM data dumping process begins:

4. Data integrity is continuously checked using CRC while downloading individual blocks (each block is 512 bytes). In most cases, it may be advisable to repeat the dumping operation twice, disconnecting and reconnecting the ROM module to clean the contacts slightly. Finally, individual files containing the ROM data are saved to the PC:

The process is similar for other modules. Here is an example if the module contains only ROM A and B:

or ROM B only:

The program reads the contents of only the ROMs that are present in the module.

RAM adapter

The RAM adapter is used for SRAM testing. It was primarily constructed to test the M48Z02 (used in FLT/ART) and the M48T02 (used in CU-1). The RAM adapter takes the form of a standard FLT ROM module. Additionally, it requires a connection to a supplementary 2-pin connector with the #WR signal, which is not present on the DSUB-25 connector of the ROM.

Before usage, the RAM adapter must be configured to the correct RAM variant using solder bridges (SB1 - SB3) on the PCB. The configuration is as follows:

The supported commands are:

• RAM_test ram_type serial_port, for example: ./RAM_test M48T02 /dev/ttyUSB0

This command tests the SRAM battery and SRAM memory. The supported SRAM types (ram_type) for this command are:

• RAM_clock_cmd ram_type command serial_port, for example ./RAM_clock_cmd M48T02 set /dev/ttyUSB0

Executes an RTC-specific command. The command (command) can be:

The supported SRAM types for this command are:

• RAM_clock_read ram_type serial_port, for example ./RAM_clock_read M48T02 /dev/ttyUSB0

Retrieves the time from the SRAM RTC and prints it on the screen in an infinite loop at a rate of twice per second. Use Ctrl-C to stop the execution of this command.

The supported SRAM types for this command are:

Complete procedure to test battery-backed RAM

1. Use RAM_test to check the RAM battery and RAM memory cells.
2. If the RAM has an RTC:

• Execute the reset command to reset the RAM clock.

• Execute the start command* to starts the internal oscillator and enable normal clock operation.

• Execute the set command to set the current time.

• Run RAM_clock_read to verify both the validity of the time and that it increments. If both conditions are met, the RTC is functioning properly.

87C510 adapter

The 87C510 adapter is designed for reading ROMs used in certain Bosch Motronic ECUs. The TMS87C510 is a 64 KB UV-erasable, multiplexed EPROM that supports both 8-bit and 16-bit output modes. The adapter is implemented in the form of a standard FLT ROM module, with the 87C510 configured and wired as ROMB.

Notes

Atmega64A fusebits should be configured as follows: