Compiler 5.06: CPU-Option Cortex-R4F vs Cortex-R5F

Hello Ronan,

thank you for answering.

The reason why we use the version 5 of armcc is a requirement of the RTOS we use (it's a RTOS for functional safety and the certification will be lost if we use another compiler).

The reason why we cannot use the Cortex-R5F option is the missing license. We have a license for "mdk_pro_flex" (ARM_TOOL_VARIANT=mdk_pro_flex) and when using "Cortex-R5F" we get the following message:

Information about this error is available at: ds.arm.com/.../lic81
General licensing information is available at: ds.arm.com/.../
If you need further help, provide this complete error report to your supplier or license.support@arm.com.
- ARMLMD_LICENSE_FILE: '.....'
- LM_LICENSE_FILE: unset
- ARM_TOOL_VARIANT: 'mdk_pro_flex'
- ARM_PRODUCT_PATH: unset
- Product location: c:\.....\Tools\ARM-Compiler\sw\mappings
- Toolchain location: c:\.....\Tools\ARM-Compiler\bin64
- Selected tool variant: mdk_pro_flex
Product: MDK Professional 5.28 (Flex)
Component: ARM Compiler 5.06 update 6 for Certification (build 750)
Tool: armcc [4d3637]
For support see http://silver.arm.com/support
Software supplied by: ARM Limited
Fatal error: C3903U: Argument 'Cortex-R5F' not permitted for option 'cpu'.

But your answer let me think that we could use the Cortex-R5F option. Do we made something wrong regarding the license-management?

Hello Ronan,

thank you for answering.

The reason why we use the version 5 of armcc is a requirement of the RTOS we use (it's a RTOS for functional safety and the certification will be lost if we use another compiler).

The reason why we cannot use the Cortex-R5F option is the missing license. We have a license for "mdk_pro_flex" (ARM_TOOL_VARIANT=mdk_pro_flex) and when using "Cortex-R5F" we get the following message:

Information about this error is available at: ds.arm.com/.../lic81
General licensing information is available at: ds.arm.com/.../
If you need further help, provide this complete error report to your supplier or license.support@arm.com.
- ARMLMD_LICENSE_FILE: '.....'
- LM_LICENSE_FILE: unset
- ARM_TOOL_VARIANT: 'mdk_pro_flex'
- ARM_PRODUCT_PATH: unset
- Product location: c:\.....\Tools\ARM-Compiler\sw\mappings
- Toolchain location: c:\.....\Tools\ARM-Compiler\bin64
- Selected tool variant: mdk_pro_flex
Product: MDK Professional 5.28 (Flex)
Component: ARM Compiler 5.06 update 6 for Certification (build 750)
Tool: armcc [4d3637]
For support see http://silver.arm.com/support
Software supplied by: ARM Limited
Fatal error: C3903U: Argument 'Cortex-R5F' not permitted for option 'cpu'.

But your answer let me think that we could use the Cortex-R5F option. Do we made something wrong regarding the license-management?

Thanks for confirming, I understand your situation now!

MDK only has limited support for certain Cortex-R4 devices, you should really be using Arm Development Studio.
https://developer.arm.com/documentation/ka003842/latest

However for this instance, compiling for Cortex-R4 should work OK... the pipelines are I believe identical. I doubt the RTOS makes use of SMP capabilities of the Cortex-R5.

You may have issues when it comes to debug though... which debug solution are you using?

Thank you for the confirmation that Cortex-R4 is a valid option for us.

Multi-Processing is not a functionality of the RTOS we use.

My colleagues are using iSYSTEM’s winIDEA and TI's Code Composer Studio.