On Wed, Jul 24, 2019 at 8:59 AM Michel Macena <mmacena....@gmail.com> wrote: > > Hi, I'm working with an ERC 32 target board and would like > to change the system clock frequency. There is a file in > $PROJECT_HOME/src/rtems/bsps/sparc/shared/start called Start.s. In this file > there is a line for > clock speed: >> >> SYM(CLOCK_SPEED): >> >> .word 0x0a, 0, 0, 0 ! 7E (10 MHz default) > > I want to change to 8MHz so I know that I have to change > to 0x08. However after the change can I just recompile > my programs or do I need to rebuild the RTEMS toolchain ? You will have to recompile the BSP, but not the entire toolchain.
Note: you can also program the CLOCK_SPEED variable, for example see bsps/sparc/erc32/start/boardinit.S > Also if I need to rebuild could someone explain how can I rebuild without > needing to do the whole install process ? rebuild just the bsps ? > Typically you can just go to your build directory and run 'make' again. If you did not modify any of the build files (configure/make stuff), this usually just works. Sometimes though it might not recompile the testsuites (watch for the linking) in which case you might go to the testsuites subdirectory and run make clean && make again if you need them re-linked. Or, you could delete your build tree and rerun configure && make && make install Then you should have updated the BSP, I guess. > Thanks ! > > _______________________________________________ > users mailing list > users@rtems.org > http://lists.rtems.org/mailman/listinfo/users _______________________________________________ users mailing list users@rtems.org http://lists.rtems.org/mailman/listinfo/users
