>> I have added the syscalls.c(into the source location, where main.c is)...My source configuration is 72MHz (system clock), I have included CMSIS workspace in my directory... Changed the write routine... Still doesn’t work... Code compiles, but doesn’t work...
⇒ You need to solder the ‘Solder Bridge’ SB10 (SWO)
>> I am running a GPIO example, not RTOS. Will this method mentioned by you still work?
>> In addition, I have couple more question. how adding syscalls.c and changing the _write() function changes the implementaion of printf? how the syscall.c changes the implementation in ?
⇒ Simply because printf send the string characters one by one using the _write routine (avoid using -specs=nosys.specs in linker miscellaneous flags)
>> I really need get printf or ITMSend recieve working as ap. I am using stm32f3 Discovery. How to determine the clock frequency and port number so that we can see in STLInk? Please advice.
⇒ as your cpu frequency is 72MHz, then use 72000000 as System clock and Stimulus port 0