Hi all, After compiling, I got following warning: *** WARNING L15: MULTIPLE CALL TO FUNCTION NAME: _PUTMULTICHAR_SCI/SCI CALLER1: ?C_C51STARTUP CALLER2: INT0_ISR/INTERRUPT Int0_ISR() is in interrupt.c. However, I believe that function PutMultiChar_SCI() is not called by Int0_ISR(), although it was. PutMultiChar_SCI() is called at multiply place within main loop. I read http://www.keil.com/support/docs/805.htm I was wondering is there any cause will generate this warning ? Thanks in advance. Daniel
"I never use printf()" I never said that you did - I said, "something like printf" Are you sure that you don't have any other functions that get called in your ISR, and end up calling something that calls PutMultiChar_SCI() There must be something - or the linker wouldn't complain! "I can remove L15 warning by make PutMultiChar_SCI() reentrant" Of course - the reason the Linker has this warning is that C51 functions are inherently not reentrant! "this does not make any sense for me, because I have no RTOS only main loop and interrupt service routine." The problem is that C51 functions are inherently not reentrant - it makes no difference whether the reentrant calls are due to an RTOS or due to a Main loop and ISRs
"I can remove L15 warning by make PutMultiChar_SCI() reentrant" and end up with a true mess. If you have ANYTHING that get called both by main (and subs thereof) and an ISR (and subs thereof) you will likey "install" a time bomb. remove ALL function call from the ISR (there should be none anyhow) and then see what the linker tell you. Erik