st25tb_kiemul
ST25TB / SRx NFC Emulator / Initiator based on TI TRF7970A with MSP430
This is the support project for ST25TB series NFC tags for fun in French public transports - ST25TB_transport.pdf
Note: This project now supports st25tb_kiemul (including the LP-MSP430FR2476), st25tb_kameleon and st25tb_kiwi boards
Project
st25tb_kiemul project is ready for Texas Instruments Code Composer Studio (CCS) IDE 12+, https://www.ti.com/tool/CCSTUDIO. You can use the local IDE or the online one (CCS Cloud). As TI is switching from Eclipse-based IDE to Theia, it has been also tested with CCS 20.4.
Supported configurations
Initial
LP-MSP430FR2476 + DLP-7970ABP with configuration st25tb_kiemul - MSP @ 16 MHz, CR2032 battery compatible!*MSP430* + DLP-7970ABP with new configuration to create (feel free to adapt :))
Do NOT underestimate this basic configuration. Despite the lack of led indicators: MSP430FR2476 has a lot of FRAM memory, the integrated eZ-FET lite provides the same CLI as the most recent boards.
Boards
To practice, for POCs, and for the lulz, I finally made boards to play with:
- The initial one,
st25tb_kiemul, was made to be 100% compatible with the launchpad + daughter board firmware (no CLI support)
> https://oshwlab.com/gentilkiwi/st25tb_kiemul
- The second one,
st25tb_kameleon, supports LIR2032 battery, USB power and battery charging
> https://oshwlab.com/gentilkiwi/st25tb_kameleon
- The third (and last) one,
st25tb_kiwi, supports LIR2032, LP401730 & LP402535 batteries, USB-C power and battery charging, CLI
> https://oshwlab.com/gentilkiwi/st25tb_kiwi
Flash
You can program your board from the IDE itself, but .hex files produced/downloaded can also be used with MSP430Flasher (https://www.ti.com/tool/MSP430-FLASHER) or UniFlash (https://www.ti.com/tool/UNIFLASH).
No MSP-FET required when using LaunchPad boards, as they embed an eZ-FET lite emulator. On other configurations you may need MSP-FET to flash the board, but you can also use the embedded eZ-FET lite from another Launchpad board you already have :)
Examples:
MSP430Flasher -i TIUSB -n MSP430FR2476 -z [VCC,RESET] -e ERASE_ALL -v -w st25tb_kiemul-MSP430FR2476.hex
Notes:
- replace
-i TIUSB by -i COM<number> when dealing with multiple boards connected at the same time ;
- do not hesitate to press the reset button again after flashing.
How to use it?
Wiki: https://github.com/gentilkiwi/st25tb_kiemul/wiki
Remarks
- Yep, I recreated ~1% of a
Chameleon like stuff :')
- Yep, I'm happy with it: I did it for myself to learn (& for fun)
- No, I'm not confident to be able to help to add 14B(') to https://github.com/emsec/ChameleonMini/tree/master/Firmware/Chameleon-Mini/Codec
- otherwise I would have done it
No, I will not create a single board with battery from available schematics of MSP430 LaunchPad & TRF7970A BoosterPack
well, maybe?- well, I did (and learned a lot)
- Yes, you can use other (better) MCU with the
TRF7970A, even with the original DLP-7970ABP board
- think about STM32, Raspberry PI Pico or your prefered one with
SPI support, really
Hardware references
LP-MSP430FR2476 - https://www.mouser.com/ProductDetail/595-LP-MSP430FR2476
- Board: https://www.ti.com/tool/LP-MSP430FR2476
- Chip: https://www.ti.com/product/MSP430FR2476
DLP-7970ABP - https://www.mouser.com/ProductDetail/595-DLP-7970ABP
- Board: https://www.ti.com/tool/DLP-7970ABP
- Chip: https://www.ti.com/product/TRF7970A
st25tb_kiemul
- Board: https://oshwlab.com/gentilkiwi/st25tb_kiemul
- Chip: https://www.ti.com/product/MSP430FR2476
st25tb_kameleon
- Board: https://oshwlab.com/gentilkiwi/st25tb_kameleon
- Chip: https://www.ti.com/product/MSP430FR2673
st25tb_kiwi
- Board: https://oshwlab.com/gentilkiwi/st25tb_kiwi
- Chip: https://www.ti.com/product/MSP430FR2676
Authors
Benjamin DELPY 🥝 gentilkiwi, you can contact me on Twitter ( @gentilkiwi ) or by mail ( benjamin [at] gentilkiwi.com )
Tear off part is 99% the (crazy) work of @SecLabz, see his repository https://github.com/SecLabz/near-field-chaos for more information, and functionalities! ❤️
This is a personal development, please respect its philosophy and don't use it for bad things!
License
CC BY 4.0 licence - https://creativecommons.org/licenses/by/4.0/
