Updated Symbolic Debugging for STM32 (markdown)

Symbolic-Debugging-for-STM32.md

@@ -1,4 +1,4 @@
-#How to on symbolic debugging  
+# How to on symbolic debugging  
 Symbolic debugging needs a wired link to the "SWD" pins on the PYBV10. On the pyboard these are shared with the Red and Green leds so they need to be not used when debugging.
 
 The steps for symbolic debugging 
@@ -7,7 +7,7 @@ The steps for symbolic debugging
 
 * b) build an image with symbolics and no code optomization (S0)and use an interface that drives the ST-Link (eg openStem32.org's AC6 Eclipse)
 
-##hardware wires from ST-LINK to pyboard
+## hardware wires from ST-LINK to pyboard
 Nucleo-F401RE CN4----PYBV10  
 
 1-open  
@@ -33,7 +33,7 @@ The Nucleo-F401RE board also has two "ST-LINK" jumpers that need to be removed t
 ![pyBoard wired to a ST-LINK on a Nucleo-F401RE](http://forum.micropython.org/download/file.php?id=159)
 
 
-##symbolic debugging 
+## symbolic debugging 
 Symbolic debugging is useful for checking out the interface to hardware - single stepping through each line of code, and looking at the registers/variables. Symbolic debugging often relies on a toolchain that can be difficult to get right - so often its more pain to setup and debug the debugger than it is to use other methods. 
 Retrofitting symbolic debugging to a large project often doesn't work - so it may not work for the main python code but can be very useful for some integration testing. Your mileage may vary.
 
@@ -46,14 +46,14 @@ STM's documents:
 
 ST TN0072 -Software toolchains and STM32 features 
 
-###OpenSTM32.org
+### OpenSTM32.org
 This is an Eclipse Lunar based toolchain for both Linux and Windows. 
 
 I've used it to take a STM32cubeMX example and customize it for the pyboard. As of writing (2015Nov) it doesn't accept the stmhal/build-PYBV10/firmware.ELF.  
 
 Download/install the " [System Workbench for STM32](http://www.openstm32.org/System+Workbench+for+STM32)" - 
 
-###ST-Link Upload
+### ST-Link Upload
 The ST-Link can  be used to upload to the board, see [Building ST-Flash](https://github.com/micropython/micropython/wiki/Building-st-flash).
 
 There is also an STM "STM32 ST-Link Utility" (Windows?)that can be used to verify the ST-Link works and to program to memory