how to control output voltage of 89c51 to fed led light

how to control output voltage amplitude of 89c51 to fed led light
how to control output voltage of 89c51 to fed led light

how to control output voltage amplitude of 89c51 to fed led light
Default Linker Control String - NCONST

I have a problem getting my project to link. I had to create a linker file, changing the NCONST class from :- NCONST (0xC04000-0xC07FFF), to NCONST (0xC10000-0xC13FFF), Just to get the project...
Default Linker Control String - NCONST

I have a problem getting my project to link. I had to create a linker file, changing the NCONST class from :- NCONST (0xC04000-0xC07FFF), to NCONST (0xC10000-0xC13FFF), Just to get the project...
Question about linker control file content

What's the difference between ?PR?TEST and ?PR?*?TEST in the linker control file. ("TEST" is the name of *.c file) I remember that ?PR?*?TEST means all segments in the TEST file, right? But how about...