Cortex-M0 +的预定义cpu目标宏

Question

I am currently using predefined cpu target macros to make software run on multiple cpu targets.

#ifdef __TARGET_CPU_CORTEX_M0
    [do something here]
#elif __TARGET_CPU_CORTEX_M3
    [do something here]
#else
    #error Unsupported compiler platform
#endif

Example:

This works for Cortex-M0 and Cortex-M3, but I can't figure out what macro to use for Cortex-M0+. Does anyone know which macro I can use? I use the armcc compiler.

Answer 1

This is documented , albeit rather obliquely. The relevant macro name is derived from the command-line option, thus --cpu=Cortex-M0plus defines __TARGET_CPU_CORTEX_M0PLUS .

Annoyingly, whilst it doesn't show up in the --cpu=list output, the compiler (I tried armcc version 5.04) does also recognise the option --cpu=Cortex-M0+ , for which it defines the macro __TARGET_CPU_CORTEX_M0_

In general, invoking armcc --cpu=xx --list_macros /dev/null will show what macros are defined for cpu option xx (or an error if it isn't supported).