We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 30700

10.1 EDK - SDK Debugger stalls on printf ()


When I debug a C program with SDK, it works fine as long as no "printf()" function is used in the code. However, as soon as there is a "printf()" function used the debugger stalls; that is, it does not reach breakpoints, but runs infinitely.

This problem does not occur with "xil_printf()". Note also that even with "printf()", the code runs fine, it just does not debug.


This is a problem with the SDK debugger.

There are two ways to work around this issue:


Use xil_printf () instead of printf (). For the differences in functionality, see (Xilinx Answer 19592).


Use GDB to debug the software.

AR# 30700
Date 12/15/2012
Status Active
Type General Article