ST-LINK is serial communication possible?

Question

I am using STM32F4 discovery board and Atollic TrueStudio for ARM Lite 3

I would like to pass some debugging data to PC using printf and I can't find a way to do it through STLink. Is it even possible? It seems essential feature for any debugging process.

Edit: I need to use Serial Wire Viewer, but still no luck making it work.

Answer 1

OK, The way to achieve communication in Atollic TrueStudio for ARM Lite (yes it works under lite wersion since 3.0):

1. Enable Serial Wire Viewer in active debug configuration
2. Show SWV Console (under Debug prespective)
3. Open Serial Wire Viewer settings (first button in SWV Console window)
4. Enable ITM Stimulus Port 0
5. Enable Start/Stop Trace button in SWV Console (second button)
6. Use ITM_SendChar function
7. Enjoy debugging strings!

Answer 2

It is using Crossworks.. In crossworks, we use dbg_printf but it is slow, be warned.

Answer 3

When working with embedded systems, printf is not a generally included function. If you want to be able to use printf you have to write it yourself or find an already-written one. Typically printf functions used in embedded systems write to the serial port - you can use a serial terminal program such as RealTerm to read the serial port data.