130 lines
5.8 KiB
Markdown
130 lines
5.8 KiB
Markdown
# Dragon Probe
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This project attempts to add Bus Pirate/...-like functionality to a number of
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MCUs, mainly the Raspberry Pi Pico. It was originally based on [Dapper
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Mime](https://github.com/majbthrd/DapperMime/), an SWD debugger probe implementation,
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with the goal of adding JTAG support as well. However, more and more features
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got added over time.
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## Variants
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Most support and development effort goes to the RP2040/Pico, but, due to the
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projects' structure still being based on Dapper Mime's, it is relatively easy
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to add support for another MCU/board. Any MCU supported by [TinyUSB
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](https://github.com/hathach/tinyusb) should work. Features can also be disabled
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per MCU.
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Adding support for another MCU is a matter of adding another subfolder in the
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`./bsp` folder, implementing the functionality (which only concerns itself with
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sending commands to the hardware, protocol parsing is done by shared code),
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and handling it in the `CMakeFiles.txt` file.
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## Building
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After initially downloading this project's code, issue the following command to download TinyUSB and CMSIS 5 code:
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```
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git submodule update --init --recursive
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```
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Compilation is done using CMake:
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```
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mkdir cmake-build && cd cmake-build
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cmake -DBOARD=raspberry_pi_pico -DFAMILY=rp2040 -DCMAKE_BUILD_TYPE=RelWithDebInfo ..
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```
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`BOARD` and `FAMILY` should correspond to those used in the TinyUSB `hw` folder,
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and with the folders used in `./bsp` as well.
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A non-exhaustive list of possible BOARD/FAMILY combinations:
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| `FAMILY` | `BOARD` | description | notes |
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|:-------- |:------------------ |:----------------- |:------- |
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| `rp2040` |`raspberry_pi_pico` | Raspberry Pi Pico | default |
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### Notes on compiling for the RP2040 Pico
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If you have the Pico SDK installed on your system, and the `PICO_SDK_PATH`
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environment variable is specified properly, you can omit the `--recursive` flag
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in the `git submodule` invocation (to avoid many many git clones), and pass
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the `-DUSE_SYSTEMWIDE_PICOSDK=On` flag to CMake, too.
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Other options are:
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* `-DPICO_NO_FLASH=[On|Off]`: store the binary in RAM only, useful for development.
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* `-DPICO_COPY_TO_RAM=[On|Off]`: write to flash, but always run from RAM
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* `-DUSE_USBCDC_FOR_STDIO=[On|Off]`: export an extra USB-CDC interface for debugging
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## Usage
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For detailed usage notes, please visit the [wiki](https://git.lain.faith/sys64738/DragonProbe/wiki/Home).
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## License
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The code of this project itself is licensed under the [GPL v3](https://opensource.org/licenses/GPL-3.0).
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TinyUSB is licensed under the [MIT license](https://opensource.org/licenses/MIT).
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ARM's CMSIS 5 code is licensed under the [Apache 2.0 license](https://opensource.org/licenses/Apache-2.0).
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libco is licensed under the [ISC license](https://opensource.org/licenses/ISC).
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Some code has been incorporated from the [DapperMime](https://github.com/majbthrd/DapperMime),
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[picoprobe-sump](https://github.com/perexg/picoprobe-sump),
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[JTAGenum](https://github.com/cyphunk/JTAGenum) and
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[SWDscan](https://github.com/szymonh/SWDscan)
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projects. These respective licenses can be found in
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[this](./LICENSE.dappermime), [this](./LICENSE.picoprobe-sump),
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[this](./LICENSE.jtagenum) and [this](./LICENSE.swdscan) file.
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## TODO
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- [ ] **A (VID and) PID, and maybe better subclass & protocol IDs for the vnd cfg itf**
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- [ ] GPL license headers on every file
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- [x] Debug interface to send printf stuff directly to USB, instead of having
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to use the UART interface as a loopback thing.
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- [ ] Second UART port for when stdio UART is disabled?
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- [x] I2C support ~~by emulating the I2C Tiny USB~~
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- [x] Expose RP2040-internal temperature ADC on I2C-over-USB bus?
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- [ ] ~~Does SMBus stuff need special treatment here?~~ ~~No.~~ Actually, some
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parts do, but, laziness.
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- [x] 10-bit I2C address support (Needs poking at the Pico SDK, as it only
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supports 7-bit ones).
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- [ ] **1-wire**
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- [ ] **make modes persistent?**
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- [ ] FT2232 emulation mode?
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- watch out, still need a vnd cfg interface! libftdi expects the following stuff: (TODO: acquire detailed protocol description)
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- interface 0 ("A"): index 1, epin 0x02, epout 0x81
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- interface 1 ("B"): index 2, epin 0x04, epout 0x83
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- interface 2 ("C"): index 3, epin 0x06, epout 0x85
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- interface 3 ("D"): index 4, epin 0x08, epout 0x87
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- ~~or, FX2 emulation mode??? (useful links: https://sigrok.org/wiki/Fx2lafw ; https://sigrok.org/wiki/CWAV_USBee_SX/Info )~~ has a ROM/fw and everything, so, maybe not
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- [ ] "Complex Trigger" mode for aiding with glitching triggers, by turning
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UART/SPI/I2C/eMMC/... sequences into a GPIO toggle
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- [ ] Mode where you can define custom PIO stuff for custom pinouts/protocols??????
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- Maybe also with code that auto-reacts to stuff from the environment?
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- [ ] Facedancer implementation by connecting two picos via GPIO, one doing host
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stuff, the other device, commands being sent over GPIO to do stuff
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- [ ] Maybe use the ADCs for something?
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- [ ] SD/MMC/SDIO (will be a pain)
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- [ ] MSP430 programming
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- https://dlbeer.co.nz/mspdebug/usb.html
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- https://github.com/dlbeer/mspdebug
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- https://www.ti.com/lit/an/slaa754/slaa754.pdf
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- https://www.ti.com/lit/ug/slau320aj/slau320aj.pdf
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- [ ] AVR programming (USBavr emulation?)
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- AVR ISP is hardly used anymore
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- TPI/UPDI requires 5V levels, Pico doesn't do that :/
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- debugWIRE????
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- https://github.com/travisgoodspeed/goodfet/blob/master/firmware/apps/avr/avr.c
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- [ ] PIC programming
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- https://github.com/travisgoodspeed/goodfet/tree/master/firmware/apps/pic
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- iCE40 programming??
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- Renesas E7-{0,1,2} programming thing????
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- Renesas tell us how this works pls
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- https://github.com/szymonh/rl78check is something at least
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- Maybe steal other features from the Bus Pirate, [HydraBus](https://github.com/hydrabus/hydrafw) or Glasgow or so
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- 3-wire? Never seen this one in the wild
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- CAN? LIN? MOD? If I'd first be able to find a CAN device to test it with, sure
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