IAR Information Center for RISC-V

Release notes

for IAR Embedded Workbench for RISC-V version 1.30.1

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

Highlights

Version 1.30.1

Compiler and library optimizations

New libraries to support and optimize performance for devices without M
Size-optimized libraries introduced as an option to the already existing speed-optimized versions
Several compiler optimizations for speed and size

P extension DSP and Packed SIMD

Support for the draft DSP and Packed SIMD specification, including intrinsic functions to support Andes DSP libraries.

Trace

Function profiling makes it possible to see and analyze timing information for the functions in an application
Code coverage shows the percentage of code that has been executed
Support for on-chip RAM-buffered Trace
Enhanced support for SiFive Insight debug solution

Automatic interrupt vector setup

Support for automated interrupt vector setup for devices from Andes and GigaDevice

MISRA C:2012 Amendment 1

The Static analysis tool C-STAT has extended its coverage of the MISRA C:2012 Coding Standard and now fully supports MISRA C:2012 Amendment 1. This Amendment adds 14 additional rules to MISRA C:2012 with a focus on security concerns highlighted by the ISO C Secure Guidelines. Several of these address specific issues pertaining to the use of untrustworthy data, a well-known security vulnerability.

New devices

The following devices from GigaDevice are now supported

GD32VF103C4T6, GD32VF103C6T6, GD32VF103C8T6, GD32VF103CBT6, GD32VF103R4T6, GD32VF103R6T6, GD32VF103R8T6, GD32VF103RBT6, GD32VF103T4U6, GD32VF103T6U6, GD32VF103T8U6, GD32VF103TBU6, GD32VF103V8T6, GD32VF103VBT6

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.

Support for SiFive’s evaluation bitstreams are no longer available for the Arty 35T development boards. The support for this HW in EWRISCV is deprecated and will be removed in the next release.

Known limitations

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 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 1.30 and later require IAR License Server Tools version 2.17.2 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.