Hi Gunar,
Even though these static const arrays are allocated in the .rodata segment, they are allocated in each module that includes `board.h`. XFAs addresses this problem.
So you are saying that the data gets duploicated in ROM several times? I did not know that. If that is the case, then it's definitely a bad thing!
For ESP32-Boards I tried another approach. In `periph_conf.h` there is only a declaration of an external const variable `pwm_dev_num` which contains the number of PWM devices and the macro `PWM_NUMOF` is then defined as follows: ``` extern const unsigned pwm_dev_num; #define PWM_NUMOF (pwm_dev_num) ```
Regardless of ROM duplication or not, I think you approach is much better and cleaner. Also, you don't bloat the header, and don't have the compiler parse the same definitions several times. I see no reasons to define the array in the header file.
Regards, Juan. _______________________________________________ devel mailing list devel@riot-os.org https://lists.riot-os.org/mailman/listinfo/devel
