Openocd swd cfg -f target FT232H-based JTAG, SWD, and AVR-ISP Programmer (Supported by OpenOCD and AVRDUDE) - m3y54m/cjmcu-ft232hq-programmer Jan 3, 2013 · Hi everyone, I inherited a project from someone who is entirely out of reach now. Jul 29, 2020 · Before implementing SWD over SPI in OpenOCD, I used a simple C program pi-swd-spi. Drivers: Drivers for your specific debugger (e. g. [hc]" code understanding operation semantics, shared with the JTAG transport. uf2 file. Oct 19, 2025 · 本文介绍了如何使用开源工具OpenOCD和FT2232H适配器通过SWD接口对基于ARM的MCU进行编程和调试。内容涵盖了JTAG与SWD的区别，OpenOCD的功能和配置，以及FT2232H模块的工作原理。此外，还提供了设置和使用OpenOCD的步骤，包括适配器的配置、连接目标芯片和故障排除的提示。 The FT2232 chips are flexible enough to support some other transport options, such as SWD or the SPI variants used to program some chips. These devices, like most ARM devices, use the SWD (Serial Wire Debug) interface in combination with a Debug Probe and some software (OpenOCD) to connect it to the host platform (in my case, Linux). Some major GNU/Linux distros (Debian, Fedora, Gentoo, OpenWrt), Homebrew for macOS and MSYS2 for Windows have already picked the release up. Switching the USB driver to OpenOCD In Apr 1, 2024 · Programming Raspberry Pi Pico with SWD Let us use the ‘Blink’ program as an example to understand how Raspberry Pi Pico SWD Programming works. Utilities to support ARM "Serial Wire Debug" (SWD), a low pin-count debug link protocol used in cases where JTAG is not wanted. Debug adapters are hardware devices that connect your computer to a target embedded system, allowing OpenOCD to communicate with the target for Jun 21, 2013 · Download OpenOCD - Open On-Chip Debugger for free. dummy { jtag } ftdi { jtag swd } This format is easily handled by Tcl scripts: dict get [adapter list] ftdi May 19, 2016 · Learn how to make flashing your ARM-based MCU easy by using OpenOCD debugger with an FT2232H adapter. This specific code is a transport level interface, with "target/arm_adi_v5. This document explains how SWD is implemented in OpenOCD, the protocol details, and how to use it with supported hardware adapters. Mar 12, 2024 · These examples demonstrate the versatility of OpenOCD on the Raspberry Pi with SWD over SPI, allowing you to debug and program a wide range of embedded devices conveniently and cost-effectively. , ST-Link or J-Link drivers). 0. 1) compliant TAPs on your target board. (Yes, I have double-checked the connections of all of the above pins, both on the OpenOCD config for ECP5-12 interface ftdi ftdi_channel 0 ftdi_vid_pid 0x0403 0x6014 ftdi_layout_init 0x0058 0x00fb ftdi_layout_signal nTRST -data 0x0010 ftdi_layout_signal nSRST -oe 0x0020 adapter_khz 10000 telnet_port 4444 gdb_port 3333 transport select jtag reset_config none jtag newtap lfe5 tap -expected-id 0x21111043 -irlen 8 -irmask 0xFF Debugging STM32 with OpenOCD and a Segger J-Link on Linux This article describes a debugging solution I assembled for a custom hardware project based on the STM32 series of microcontrollers. elf file to upload Aug 4, 2023 · Which HS2 FTDI GPIO pin controls tri-state of the TMS pin? We have successfully connected the Digilent HS2 to our device with OpenOCD using the JTAG interface. But OpenOCD uses . The J-Link driver in OpenOCD supports numerous adapter variants including: OpenOCD User’s Guide for release 0. The Open On-Chip Debugger. Definition at line 255 of file swd. You can now delete the openocd-code folder if you wish. , SWDIO, SWCLK, SWO, and NRST) and 3V power supply. May 12, 2025 · SWD Support Relevant source files Serial Wire Debug (SWD) is a low pin-count alternative to JTAG for ARM-based microcontroller debugging. May 17, 2025 · Debug Adapter Support Relevant source files This page documents the debug adapter support in OpenOCD, describing the various debug adapters that can be used with OpenOCD, their features, and how they integrate with the overall system architecture. h. " sudo openocd -f interface/raspberrypi-swd. It supports the NRF52 (the CPU of the PineTime) and the STLinkV2, a cheap SWD debugger. I'm following the Getting started with Raspberry Pi Pico guide for C/C++ development and having very little luck. . (Note that USB serial numbers can be arbitrary Unicode strings, and are not restricted to containing only decimal digits. The clue is in the SWD Data Port ID Register (DPIDR) value. References buf_set_u32 (), swd_cmd_queue_entry::cmd, cmd, swd_cmd_queue_entry::dst, ERROR_OK, ftdi_swd_run_queue (), ftdi_swd Mar 26, 2024 · OpenOCD is an open-source software used to program and debug embedded targets like microcontrollers and microprocessors. 1 Scan Chains TAPs are part of a hardware scan chain, which is a daisy chain of TAPs. JTAG supports debugging and boundary scan operations. Connection/detection can be completely non-intrusive, if the target itself supports it, as most Cortex-M ones do. 1. See website for full list of supported targets. OpenOCD includes an example of using the Raspberry Pi as an SWD adapter, but we need to modify which pins we are going to use for SCLK and SDIO. You can use OpenOCD with dongle-programmers such as J-Link and ST-Link or even an FTDI chip. cfg - Tells OpenOCD to use Raspberry Pi’s GPIO pins to access the SWD port. The tutorial uses OpenOCD, an open-source debugging tool, with an FT2232H USB-to-serial bridge to communicate with MCUs via SWD. The output is formatted as a Tcl dictionary indexed by the adapter name and containing the transports in a Tcl list. The sequence ends with a line reset. SWD transport works in multi-drop mode if DAP is configured with both -dp-id and -instance-id parameters regardless how many DAPs are created. Mar 3, 2023 · I'm happy to announce the availability of OpenOCD version 0. May 29, 2021 · Is it possible to instruct OpenOCD to read and follow actual MCU frequency, in particular change SWD frequency after RCC initialization for faster debugging? Alternatively, is there a way to pre-configure RCC via OpenOCD even before any debugging starts? Mar 23, 2023 · Using J-Link with OpenOCD In general, it is possible to use J-Link with OpenOCD. If you remember in the ‘Programming Raspberry Pi Pico with C’ tutorial, we already built the Blink program, which resulted in a few target files. OpenOCD User’s Guide for release 0. Using the Debug Probe to upload new binaries is an entirely hands-off affair. " The newer SWD devices (SW-DP v2 or SWJ-DP v2) support the multi-drop extension of SWD protocol: two or more devices can be connected to one SWD adapter. Is Software Debugger-Tools: Open On-Chip Debugger (OpenOCD) or JLINK-Commander software for communicating with the JTAG/SWD interface. c to test the individual SWD functions. For drag-and-drop programming via USB, we used the . Feb 27, 2024 · Code: Select all # SPDX-License-Identifier: GPL-2. As an example, this would switch a dual-mode debug adapter into SWD mode and out of JTAG mode. There are script files to handle flashing firmware through openOCD, but this is failing on a Pi 4. 0-or-later # # Config for using Raspberry Pi's expansion header # # This is best used with a fast enough buffer but also # is suitable for direct connection if the target voltage # matches RPi's 3. for details, see Jan 31, 2025 · Summary The STM32 VS Code extension doesn’t natively support OpenOCD, but with some simple configuration, you can integrate it into your debugging workflow. Examples of "debug-capable" transports are JTAG or SWD. Introduction to SWD Serial Wire Debug (SWD) is part of the ARM Debug Interface version 5 (ADIv5), providing a two-wire Infrastructure for specifying and managing the transport protocol used in a given debug or programming session. 0+dev 17 November 2025 This User’s Guide documents release 0. Returns ERROR_OK on success, else a negative fault code. # # Do not forget the GND connection, pin 6 of the expansion header. OpenOCD with patches for SWD. 0 19 June 2018 This User’s Guide documents release 0. Description of the target and procedure to upload the file. OpenOCD supports both protocols and allows selecting one explicitly: OpenOCD with SWD support. Whether you’re prototyping new applications or refining existing ones, mastering these tools can propel your projects to success. I'm assuming I need a new one for the Pi4, since its architecture changed quite a bit. This is an area where I know next to nothing. Referenced by swd_select (). This is an intro to this software. - raspberrypi/openocd The Debug Probe will let you load binaries via the SWD port and OpenOCD: you will not need to unplug, and then push-and-hold, the BOOTSEL button every time you push a new binary to your Pico. Initialize the debug link so it can perform SWD operations. For SWD the activation code is an 8-bit sequence. We would like to change the transport to the 2-wire SWD interface. If not specified, serial numbers are not considered. There are also SWD Adapters that support Serial Wire Debug (SWD) signaling to communicate with some newer ARM cores, as well as debug adapters which support both JTAG and SWD transports. cfg user config file may override features in any of the above files by setting variables before sourcing the target file, or by adding commands specific to their situation. I hope you’ll do the same when you’re modifying OpenOCD. It does not make use of any high level logic etc. Examples of "programming-capable" transports include SPI or UART; those are used (often mediated by a ROM bootloader) for ISP style programming, to perform an initial load of Raspberry Pi's downstream fork of OpenOCD for use with Pico-series devices. Infrastructure for specifying and managing the transport protocol used in a given debug or programming session. "-f interface/raspberrypi-swd. 0+dev, dated 17 November 2025, of the Open On-Chip Debugger (OpenOCD). To do this, we need to define a SWD_EN signal which is used to drive o TAP Declaration (OpenOCD User’s Guide)10. The program tests all the functions we have covered: misaligned SWD reads, padded SWD writes, JTAG-To-SWD reset, Throwaway Read IDCODE, Write ABORT, Read CTRL/STAT Initialize the debug link so it can perform SWD operations. Read appendix A. According to the datasheet for the STM32F103 CPU, this should be 1BA01477. 3V and the cable is short enough. cfg file for all the others. Bits are About (OpenOCD User’s Guide)For example, a JTAG Adapter supports JTAG signaling, and is used to communicate with JTAG (IEEE 1149. cfg:. and therefore is much slower than the proprietary SEGGER J-Link DLL / GDBServer / implementation. Single-DAP support only. Dormant-to-SWD sequence. e. They also need to be added to OpenOCD’s software mirror of that hardware list, giving each member a name and associating other data with it. This article covers how to set up OpenOCD (either Streamline or ST’s fork) with the extension by modifying the launch. Aug 13, 2017 · SWD is a 2-pin alternative to the traditional 5-pin JTAG, saving MCU pins. Mar 31, 2025 · OpenOCD Config Files In order to communicate with this interface properly, we'll need two separate OpenOCD config files, one for the Raspberry Pi (our debugger) and one for our target (our debuggee). 0, dated 19 June 2018, of the Open On-Chip Debugger (OpenOCD). OpenOCD that supports SWD over SPI on Raspberry Pi - lupyuen/openocd-spi The openocd. Definition at line 1135 of file ftdi. Debug Adapter Configuration (OpenOCD User’s Guide)Command: adapter list List the debug adapter drivers that have been built into the running copy of OpenOCD. But, if you have a spare Raspberry Pi (and who doesn't these days?) you can use it as a native OpenOCD programmer with just a few wires. My A blog focusing on hardware and software reverse engineering 在本文中，我们将为读者详细介绍如何利用相关工具从Xbox One控制器中提取、分析和修改相关固件。 背景 当我在公寓里寻找我下一篇文章要分析的对象时，惊喜地发现了一个尚未拆封的XBox One控制器，具体如下图所示： 实际上，我很少玩XBox，所以，倒不如把这个控制器拆开，看看能否从中提取出 Dormant-to-SWD sequence. json file, allowing you t Mar 16, 2016 · OpenOCD is great because its cross platform, open source, and has support for a vast number of chips & programmers. 145 153 staticconst swd_seq_swd_to_dormant 154/* At least 50 SWCLK cycles with SWDIO high */ 155 156/* Switching sequence from SWD to dormant */ 157 158 159 staticconstunsigned swd_seq_swd_to_dormant_len 160 171 staticconst swd_seq_dormant_to_swd 172/* At least 8 SWCLK cycles with SWDIO high */ 173 174/* Selection alert sequence */ 175 176 177/* Jul 9, 2019 · For SWD, OpenOCD always prints the detected DPIDR register (and generally breaks if no target is found; output will be different at least). Configure OpenOCD We now need two configuration files: Configuration of the protocol and the pins on the pi. Simple scan chains, with a single TAP, are common in systems with a single microcontroller or microprocessor. To use an external USB→SWD probe such as Picoprobe in Appendix A, specify a different interface. Let’s create a folder and the first file, called raspberrypi-custom. A TAP is a “Test Access Port”, a module which processes special instructions and data. Jun 19, 2020 · I am starting with a simple STM32 board that has only SWD (i. 46 /* for debug, set do_sync to true to force synchronous transfers */ OpenOCD and STLink OpenOCD (Open O n C hip D ebugger) is an open source tool that interfaces with many SWD/JTAG debugger to provide debugging and in-system programming for embedded target devices. This sub is dedicated to discussion and questions about embedded systems: "a controller programmed and controlled by a real-time operating system (RTOS) with a dedicated function within a larger mechanical or electrical system, often with real-time computing constraints. Note: To maintainers and integrators: Reset configuration touches several things at once. # adapter driver bcm2835gpio #bcm2835gpio The Debug Probe will let you load binaries via the SWD port and OpenOCD: you will not need to unplug, and then push-and-hold, the BOOTSEL button every time you push a new binary to your Pico. Jan 28, 2019 · Info : BCM2835 GPIO JTAG/SWD bitbang driver Info : JTAG and SWD modes enabled Info : clock speed 1001 kHz Info : SWD DPIDR 0x02192468 . May 17, 2025 · OpenOCD provides comprehensive support for J-Link adapters, enabling debugging and programming of various target devices through both JTAG and SWD interfaces. Examples of "programming-capable" transports include SPI or UART; those are used (often mediated by a ROM bootloader) for ISP style programming, to perform an initial load of 145 153 staticconst swd_seq_swd_to_dormant 154/* At least 50 SWCLK cycles with SWDIO high */ 155 156/* Switching sequence from SWD to dormant */ 157 158 159 staticconstunsignedint swd_seq_swd_to_dormant_len 160 171 staticconst swd_seq_dormant_to_swd 172/* At least 8 SWCLK cycles with SWDIO high */ 173 174/* Selection alert sequence */ 175 176 177/* 项目说明 本项目将基于CH347的接口特性，逐渐增添对应的接口应用，当前已加入： 1、添加CH347-JTAG接口的Openocd可执行环境 2、依托于1中openocd编写的FPGA下载工具CH347FPGADownloader，当前可实现XILINX部分FPGA的程序烧写。 OpenOCD is now installed, and on the path so we can run it from any folder. Bits are Mar 22, 2020 · Most ARM devices are debugged using either SWD or JTAG protocol. The "Open On-Chip Debugger" provides JTAG/SWD access from GDB (or directly with TCL scripts) to processors with ARM and MIPS based cores. cfg file for the Pi1, and rpi2. Additionally, JTAG supports boundary scan testing. This repo provides an example code that just blinks LED instruction of build/install openocd device on Ubuntu 2022. 12. This is at least 8 TCK/SWCLK cycles with TMS/SWDIO high to abort any ongoing selection alert sequence, followed by a specific 128-bit selection alert sequence, followed by 4 TCK/SWCLK cycles with TMS/SWDIO low, followed by a specific protocol-dependent activation code. More complex Jan 11, 2021 · How to Debug Hardware with OpenOCD or PyOCD If you are having problems in the development of firmware for hardware, it is recommended to use a debugger to see the problem. Other interfaces like ethernet or parallel port are also represented. TAPs are daisy-chained within and between chips and boards. c. OpenOCD handles J-Link as a dumb JTAG/SWD/ probe and only uses the very low level logic to output JTAG/SWD/ sequences. OpenOCD User’s Guide: Debug Adapter ConfigurationSpecifies the serial-number of the FTDI FT2232 device to use, in case the vendor provides unique IDs and more than one FT2232 device is connected to the host. I have the rpi1. The combination of OpenOCD, J-Link, and SWD creates a powerful ecosystem for embedded development, enhancing programming flexibility and debugging efficiency. Contribute to corecode/openocd-swd development by creating an account on GitHub. 10. and then OpenOCD terminates back to the command line. ) Config This is usually a USB device that provides an interface to one or more transports such as JTAG or SWD. 04 how to use openocd connect you debugger and pico in Clion troubleshooting Official OpenOCD Read-Only Mirror (no pull requests) - openocd-org/openocd JTAG Debugging [中文] This document provides a guide to installing OpenOCD for ESP32 and debugging using GDB. They have two communications channels, and one can be used for a UART adapter at the same time the other one is used to provide a debug adapter. This is coupled to recent versions of ARM's "CoreSight" debug framework. Normally the board configuration file should define it and assume that the JTAG adapter supports everything that’s wired up to the board’s JTAG connector. Contribute to Nitrokey/OpenOCD-SWD development by creating an account on GitHub. bygx skveeh zbp zcvtpw bgzip nutie qyviquwx hdtuo ecr mykzcxi eulem rlyzd dggmnwo wjsx mptt