In case actual read data is returned on the next read request this is the case for example with interface JTAG this command performs the additional dummy read request automatically. Writes to a CoreSight AP register. This command performs a full-qualified write which means that it tries to write until the write has been accepted or too many WAIT responses have been received.
Reads from a CoreSight DP register. In case actual read data is returned on the next read request this is the case for example with interface JTAG, not with SWD this command performs the additional dummy read request automatically. Writes to a CoreSight DP register. If necessary, the target CPU is halted in order to read memory.
Zone names will be displayed on first connect to target with J-Link commander if available. Read memory from the target system in units of 8-bit. Read memory from the target system in units of bits. Configure JTAG scan chain with multiple devices on it. For more detailed information on how to configure a scan chain with multiple devices please refer to Determining values for scan chain configuration. Erases all flash sectors or a certain flash range of the current device.
A device has to be specified previously. Program a given data file. Currently supported data files are:. NumBytes is limited to bytes at once. This means, if you want to write e. Offset applies to both destination and source file.
J-Link commander can also be used in batch mode which allows the user to use J-Link commander for batch processing and without user interaction. When using J-Link commander in batch mode, the path to a command file is passed to it. The syntax in the command file is the same as when using regular commands in J-Link commander one line per command. Unlike the J-Link, it cannot set an unlimited number of flash breakpoints.
Amongst all the devices tested, it has the lowest performance. This means longer development times and more debugging frustration. We do not recommend or support the following programming methods via J-Link Commander or J-Flash Lite for production purposes. Regarding production programming, only production grade programming tools should be used.
Production grade programming tools typically feature a more sophisticated, multi-step verification process. We instead recommend J-Flash or Flasher for your production grade programming needs. J-Link Commander is a free command line utility for simple analysis of the target system with J-Link.
J-Flash Lite is a free, simple graphical user interface which allows downloading into flash memory of target systems. How to perform downloading into flash via J-Flash Lite:. Flasher is a programming tool for all common devices with internal or external flash memory. For a list of all supported devices click here. Flasher can also operate as a normal J-Link. J-Flash can be used as a GUI-based application or in batch mode. It is available for Windows, Linux and macOS.
J-Link vs. I-jet J-Link and I-jet were tested. We welcome contributions in any area, even if you just create an issue. If you would like to get involved but aren't sure what to start with, just ask on Slack or GitHub discussions and we'll be happy to help you. Or you can look for an open issue.
Any work on major changes should be discussed with the maintainers to make everyone is aligned. Please see the contribution guidelines for detailed requirements.
The developers' Guide has instructions on how to set up a development environment for pyOCD. New pull requests should be created against the develop branch. PyOCD is licensed with the permissive Apache 2. All documentation and the website are licensed with CC BY 4. Skip to content. Star Open source Python library for programming and debugging Arm Cortex-M microcontrollers pyocd.
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