Cortex M4 not detected in nRF5x MDK for IAR version 8.0.3

[stephan]

In IAR Embedded Workbench for ARM, version 7.40.3.8938 (w/ common components version 7.2.4.3784) with nRF5x MDK for IAR version 8.0.3.

When selecting the target in General options -> Target -> Device = nRF52832_xxAA, IAR cannot detect the right core: ARM Cortex M4 and in the libraries tab, CMSIS cannot be selected.

I found the following fix:

Locate file nrf52832_xxaa.i79 in your installation directory of IAR: ...\IAR Systems\Embedded Workbench 7.2\arm\config\devices\NordicSemiconductor: in section [CORE], change the name of the ARM processor core from

name=Cortex-M4F

to

name=Cortex-M4

edit: What is the right fix, since IAR seems to not detect M4F?

[RK]

Don't see how it can be correct as the ARM processor in the nRF52832 is an M4F, if you leave out the F, you don't get the floating point support.

[stephan]

Should be taken from the following line: fpu=VFPv4-SP

[RK]

That tells it what FPU there is, however if the core is specified as M4 with no 'F' the type of fpu, whether specified or not, should be ignored. This core is an M4F on every other toolchain.

[Susheel Nuguru]

like RK said M4 is not the same as M4F. If you select M4 then it does not matter what you select in in fpu

[stephan]

On STM32F407ZG which is an Cortex M4F as well, the corresponding file STM32F407ZG.i79 contains the same pattern, and when selected with IAR, the co-processor is correctly detected as VFPv4 single precision. With name=M4F IAR does not detect it is a M4, at all.