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JTAG deinit, update README

This commit is contained in:
Triss 2021-06-03 00:45:32 +02:00
parent 54d6095269
commit 5e57171698
2 changed files with 38 additions and 13 deletions
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47
README.md
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@ -42,18 +42,34 @@ the `-DUSE_SYSTEMWIDE_PICOSDK=On` flag to CMake, too.
## Usage ## Usage
The pin mapping is as follows: These microcontrollers support the following protocols:
| Pin number | Usage (SWD mode) | Usage (JTAG mode) | | MCU | SWD | JTAG | UART |
|:---------- |:---------------- |:----------------- | |:------ |:---:|:----:|:----:|
| GP2 | SWCLK | TCK | | RP2040 | X | X | X |
| GP3 | SWDIO | TMS | | STM32F072B Discovery | X | | X |
| GP4 | UART TX | UART TX |
| GP5 | UART RX | UART RX | The original repository (Dapper Mime) supported only SWD and UART, and worked
| GP6 | | TDI | for these two boards. This fork focusses on adding more protocols, but the
| GP7 | | TDO | author of this fork only has a Raspberry Pi Pico.
| GP8 | | nTRST |
| GP9 | | nRESET | The pin mapping for the RP2040 is as follows:
| Pin number | Usage |
|:---------- |:--------------- |
| GP0 | stdio UART TX |
| GP1 | stdio UART RX |
| GND | <ground;> |
| GP2 | SWCLK/TCK |
| GP3 | SWDIO/TMS |
| GP4 | UART TX |
| GP5 | UART RX |
| GND | <ground;> |
| GP6 | TDI |
| GP7 | TDO |
| GP8 | nTRST |
| GP9 | nRESET |
| GND | <ground;> |
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
@ -63,7 +79,8 @@ In SWD mode, the pin mapping is entirely as with the standard Picoprobe setup,
as described in Chapter 5 and Appendix A of [Getting Started with Raspberry Pi as described in Chapter 5 and Appendix A of [Getting Started with Raspberry Pi
Pico](https://datasheets.raspberrypi.org/pico/getting-started-with-pico.pdf) Pico](https://datasheets.raspberrypi.org/pico/getting-started-with-pico.pdf)
JTAG mode is currently untested. In JTAG mode, TCK and TMS have the same pins as SWCLK and SWDIO, respectively,
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.
@ -74,3 +91,9 @@ 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).
## TODO
- [ ] Flashrom/SPI support using Serprog
- [ ] I2C support by emulating the I2C Tiny USB
- [ ] AVR programming (USBavr emulation?)

4
bsp/rp2040/DAP_config.h
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@ -298,7 +298,9 @@ Disables the DAP Hardware I/O pins which configures:
- TCK/SWCLK, TMS/SWDIO, TDI, TDO, nTRST, nRESET to High-Z mode. - TCK/SWCLK, TMS/SWDIO, TDI, TDO, nTRST, nRESET to High-Z mode.
*/ */
__STATIC_INLINE void PORT_OFF (void) { __STATIC_INLINE void PORT_OFF (void) {
sio_hw->gpio_oe_clr = PROBE_PIN_SWCLK_MASK | PROBE_PIN_SWDIO_MASK; sio_hw->gpio_oe_clr = PROBE_PIN_SWCLK_MASK | PROBE_PIN_SWDIO_MASK
| PROBE_PIN_TDI_MASK //| PROBE_PIN_TDO_MASK
| PROBE_PIN_nTRST_MASK | PROBE_PIN_nRESET_MASK;
} }