IAR Information Center for RISC-V

Release notes

for IAR Embedded Workbench for RISC-V version 1.21.1

Read about the latest features, new device support, and program corrections in the release notes.

Highlights

Nexus IEEE-ISTO 5001™ compatible trace

The Embedded Workbench for RISC-V now support the I-jet Trace probes and a first implementation of trace based on the Nexus Protocol. Trace adapters for the Arty A7-100T FPGA development platform can be used to enable capture of external 4-bit trace via the Pmod connectors. Trace viewers including time-line visualization and search capabilities are enabled in the Embedded Workbench IDE.

Important information

Upgrade information

Before you install

To avoid any problems, do not install this release in a directory where you have previously installed any older version of IAR Embedded Workbench. It is recommended that you either uninstall an earlier product, or install this release in a separate directory. As before, however, it is possible to install different products, all using the same version of the main application, in the same root directory.
License renewal

The upgrade to this version requires a license renewal. This can be performed by starting the IAR License Manager and selecting License→Check for License Renewal, or by using the Light License Manager with the command LightLicenseManager renew YOUR_PROD.EW.

Microsoft SCC interface no longer supported

Microsoft SCC-compatible version control systems are no longer supported by IAR Embedded Workbench.
Microsoft Windows

Windows Vista and newer operating systems have a security mechanism called UAC (User Access Control). Disabling UAC will automatically grant you permission when a task requires administrative rights but this is not recommended because it will reduce the security of the computer. It is not necessary to run the IAR Embedded Workbench IDE as an administrator. However, if you are not, modifications to the installed product tree in C:\Program Files\IAR Systems might not work as intended and could give unexpected results. One example is opening and building projects directly from the installed product tree. The build will succeed, but the resulting files (object, list, ...) will not appear where expected. Instead all output files will be redirected by the OS to C:\Users\<user name>\AppData\Local\VirtualStore\Program Files\IAR Systems. To avoid this, the preferred way is to copy the examples to a location outside Program Files, either manually or automatically by opening them via the IAR Information Center.

Known limitations

Support for the RV32IM/RV32EM extensions are currently HW requirements and devices without either one are not supported in this release. Libraries to support devices without the M extension will be added in future releases.
C++ RTTI and exceptions are not supported by the compiler.
The exception and interrupt catch functionality that can be enabled under Project>Options>I-jet>Breakpoints>Catch exceptions requires that the selected device has implemented triggers for instruction counter, interrupt catch and exception catch. Consult the device vendor manual for details.
Flash breakpoints are not supported in this release.
#pragma vector and automatic population of an interrupt vector is not supported for all devices. Setting up an interrupt vector will then require manual setup.
Some of the flash loaders included in this release are macro based and are to be considered temporary. Until a flash loader executing in RAM is implemented, the performance with respect to download speed will be limited.
The Embedded Workbench for RISC-V is not fully ABI compliant with the RISC-V specification, and linking with libraries compiled with gcc is not supported in this release.

Network licenses

For network licenses, IAR Embedded Workbench for RISC-V version 1.10 and later require IAR License Server Tools version 2.17.1 or later. For more information, see technical note TN21842. The latest IAR License Server Tools are backwards compatible with previous IAR Embedded Workbench versions.

Trademarks

IAR Systems, IAR Embedded Workbench, Embedded Trust, C-Trust, IAR Connect, C-SPY, C-RUN, C-STAT, IAR Visual State, IAR KickStart Kit, I-jet, I-jet Trace, I-scope, IAR Academy, IAR, and the logotype of IAR Systems are trademarks or registered trademarks owned by IAR Systems AB

Microsoft and Windows are registered trademarks of Microsoft Corporation. Adobe and Acrobat Reader are registered trademarks of Adobe Systems Incorporated. CodeWright is a registered trademark of Starbase Corporation. All other product names are trademarks or registered trademarks of their respective owners.