How to solve Keil MDK 5.38a AC6 problem by install AC5

1Introduction

This application note provides a guide to how to solve Keil MDK5.38a AC6 compilation problem.Starting with MDK5.37, the AC5(ARMCC) compiler is no longer installed by default and needs to be installed separately.If you use an older version of the CMSIS file, the compilation will fail, so we need to install plug-in AC5 or update the CMSIS file.

2 Install AC5

AC5(ARMCC) compiler download link.

https://developer.arm.com/documentation/ka005184/latest

Installation procedure

Notes that it should be installed in the ARMCC folder of the KEIL MDK installation path.

Click “Option for target”.

You can choose AC5 to compile program.