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update README

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Triss 2021-06-08 02:32:06 +02:00
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README.md
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@ -46,7 +46,7 @@ These microcontrollers support the following protocols:
| MCU | SWD | JTAG | UART | SPI (flashrom) | I2C | AVR programming | | MCU | SWD | JTAG | UART | SPI (flashrom) | I2C | AVR programming |
|:------ |:---:|:----:|:----:|:-------------- |:--- |:--------------- | |:------ |:---:|:----:|:----:|:-------------- |:--- |:--------------- |
| RP2040 | X | X | X | WIP | Planned | Planned | | RP2040 | X | X | X | X | Planned | Planned |
| STM32F072B Discovery | X | | X | | | | | STM32F072B Discovery | X | | X | | | |
The [original repository](https://github.com/majbthrd/DapperMime/) (Dapper The [original repository](https://github.com/majbthrd/DapperMime/) (Dapper
@ -77,6 +77,10 @@ The pin mapping for the RP2040 is as follows:
| GP13 | nCS | | GP13 | nCS |
| GND | <ground> | | GND | <ground> |
On the RP2040, two USB CDC interfaces are exposed: the first is the UART
interface, the second is for Serprog. If you have no other USB CDC devices,
these will be `/dev/ttyACM0` and `/dev/ttyACM1`, respectively.
The UART pins are for connecting to the device to be debugged, the data is The UART pins are for connecting to the device to be debugged, the data is
echoed back over the USB CDC interface (typically a `/dev/ttyACMx` device on echoed back over the USB CDC interface (typically a `/dev/ttyACMx` device on
Linux). If you want to get stdio readout on your computer, connect GP0 to GP5, Linux). If you want to get stdio readout on your computer, connect GP0 to GP5,
@ -92,16 +96,30 @@ TDI and TDO are on the next two consecutive free pins.
In your OpenOCD flags, use `-f interface/cmsis-dap.cfg`. Default transport is In your OpenOCD flags, use `-f interface/cmsis-dap.cfg`. Default transport is
JTAG, if OpenOCD doesn't specify a default to the probe. JTAG, if OpenOCD doesn't specify a default to the probe.
For Serprog, use the following `flashrom` options (if `/dev/ttyACM1` is the USB
serial device on your machine corresponding to the Serprog CDC interface of the
Pico):
```
flashrom -c <flashchip> -p serprog:dev=/dev/ttyACM1:115200 <rest of the read/write cmd>
```
Different serial speeds can be used, too. Serprog support is *techincally*
untested, as in it does output the correct SPI commands as seen by my logic
analyzer, but I don't have a SPI flash chip to test it on.
## License ## License
TinyUSB is licensed under the [MIT license](https://opensource.org/licenses/MIT). TinyUSB is licensed under the [MIT license](https://opensource.org/licenses/MIT).
ARM's CMSIS_5 code is licensed under the [Apache 2.0 license](https://opensource.org/licenses/Apache-2.0). ARM's CMSIS_5 code is licensed under the [Apache 2.0 license](https://opensource.org/licenses/Apache-2.0).
libco is licensed under the [ISC license](https://opensource.org/licenses/ISC)
## TODO ## TODO
- [x] CMSIS-DAP JTAG implementation - [x] CMSIS-DAP JTAG implementation
- [ ] Flashrom/SPI support using Serprog - [x] Flashrom/SPI support using Serprog
- [ ] UART with CTS/RTS flow control - [ ] UART with CTS/RTS flow control
- [ ] I2C support by emulating the I2C Tiny USB - [ ] I2C support by emulating the I2C Tiny USB
- [ ] Expose RP2040-internal temperature ADC on I2C-over-USB bus? - [ ] Expose RP2040-internal temperature ADC on I2C-over-USB bus?