How exactly does the printf to UART work?

[Karin_Bøe]

Hello, I migrated codes that I believed to be relevant to the UART output to a new project, namely the uart_init function and others, and it worked in main.c, which is where I put the "uart_init" function.

However, it does not work elsewhere i.e. if I use the printf function, the whole program goes into hard fault handler. Also, when I try to "go to definition" printf, I get nothing.

Why is that?

Thank you for looking into the problem.

The code: http://textuploader.com/5nqxs

The problem is that I can get correct results as long as I use printf in the main.c not anywhere else, even by reference.

[Ron]

Im encountering a similar problem, 

I ran a software with uart_init and print from main.c

it worked on the NRF51_DK 

but when I programmed  my own custome made hw with it , it failed after the 4th char , sending me to UART0_IRQHandler error interrupt. my custome hardware is NRF51822 (not NRF51422 like the NRF51_DK)

did you have any luck understanding what causes the error ?

Thanks

Eran

[Mouss]

Hello Ran, 

Did you resolve the problem ? 

Can you remember what was is exactly ? 

Kind regards, 

[Ron]

Hi,

Sorry, I actually don't remember this issue