diff --git a/README.md b/README.md
index c85235d6bd94f1e8f475964703fc432db4caa46d..1943ef2d90a85e73bf96f24c41932868a9ce319e 100644
--- a/README.md
+++ b/README.md
@@ -38,16 +38,35 @@ Start the ITM tracing tool
 ```
 itmdump /tmp/swo.log
 ```
+Notice, the itmdump tool must be started BEFORE the openocd session (see Debug) in order to capture the ITM trace. 
 
 ## Debug 
 
 To run the program you will use the debugger integrated in eclipse. It uses openocd to communicate with the nucleo board, and gdb to 
 flash the image (generated .elf file) and interact (running, stepping, setting breakpoints etc.).
 
-Clic on the small green bug icon and select the d7020e_srp Debug oldgdb. (There other ways as well.)
+Click on the select the boxed `d7020e_srp Debug oldgdb` and click the boxed green bug icon. (There are other ways as well.)
 
 This will start openocd and gdb, and by default break at main. To execute the program to end, click the play icon.
 
 For further info on gdb debugging in eclipse see e.g., http://gnuarmeclipse.github.io/debug/
 
+The trace_printf is redirected to the ITM port, and you should get a trace of your program in the terminal.
+
+Notice, that setting breakpoints in the code may be a bit wonky, we use macros and that confuses the eclipse gdb interface. 
+The `BREAKPOINT` macro infers a compiler barrier that "should" allow you to put breakpoints in the code. Stepping in code that 
+is creating interrupts is also wonky, e.g., if sigle stepping over a `JOB_REQUEST` (that "pends" the corresponding interrupt handler), 
+the pend bit is correctly handeled. This is not a problem for this project only, but a general problem of the gdb integration, so 
+be aware.
+
+## Problems
+
+If openocd fails to start, one possible error is that the `/tmp/swo.log` file has been locked to a bad state. Actually its not an 
+ordinary file but rather a (linux/posix) FIFO, allowing the openocd to pipe data to the itmdump tool. You may want to stop the itmdump
+and restart it, and try to launch the debugger again.
+
+## Tips  
+
+ 
+
 
diff --git a/include/SRP.h b/include/SRP.h
index 86ffd3ae136c30bd0df36c03a2a6b4b9e574caa6..54ea8bd2d90477fb651ae6a79b37ce82a7b3a9f1 100644
--- a/include/SRP.h
+++ b/include/SRP.h
@@ -34,5 +34,5 @@
 
 #define TASK(J)			void IRQh(J) ()
 
-
+#define BREAKPOINT      { asm volatile("" ::: "memory"); }
 
diff --git a/src/main.c b/src/main.c
index 7cd76dd26995d93dbb324eb8549d2c1c2bf550b9..be522cab1d2cba826a6d9a73e3fa726099f6b8db 100644
--- a/src/main.c
+++ b/src/main.c
@@ -38,6 +38,7 @@ int main() {
 	JOB_REQUEST(j1);			// comment out in assignment c
 	//JOB_REQUEST(j3);  		// use in assignment c
 
+	BREAKPOINT;
 	while (1) ;
 	return 0;
 }
@@ -47,6 +48,7 @@ TASK(j1) {
 	LOCK(r2);
 		JOB_REQUEST(j2); 			// job execution request for j2
 		trace_printf("j1 after job request j2\n");
+		BREAKPOINT;
 		LOCK(r1);
 			trace_printf("j1_r1_locked, before job request j2\n");
 			JOB_REQUEST(j2);