layout update

Board-STM32F746-Discovery.md

@@ -4,7 +4,7 @@ Cortex M7 STM32F746G
 * [STM32F74xxx Reference Manual](http://www.st.com/web/en/resource/technical/document/reference_manual/DM00124865.pdf)
 * [Board User Manual](http://www.st.com/st-web-ui/static/active/en/resource/technical/document/user_manual/DM00190424.pdf)
 
-###Features###
+### Features
 * STM32F746NGH6U 216MHz (216pin TFBGA)
 * 1024KB flash ROM, 320KB RAM
 * USB OTG FS/HS, camera interface, Ethernet, LCD-TFT
@@ -17,7 +17,7 @@ Cortex M7 STM32F746G
 * Arduino Uno V3 connectors
 * Integrated ST-LINK/V2-1
 
-###Status###
+### Status
 * I think that this board now has as much support as the pyboard.
 * Things which are not working (or haven't been tested):
   * SDRAM (16 Mbytes - 8 Mbytes accessible)
@@ -29,11 +29,11 @@ Cortex M7 STM32F746G
   * ethernet
 * Use BOARD=STM32F7DISC to build micropython
 
-###Powering the Board###
+### Powering the Board
 It is recommended that you power the board using the 5V connector or via a powered USB hub which is capable of delivering an amp or two. In my current setup the board is drawing about 850 mA with the backlight off.
 I've been using this hub: http://www.adafruit.com/products/961 I've also run the board without a hub (and the PC was limiting the current to 500 mA), which means that something was suffering for not having as much current.
 
-###Entering DFU mode###
+### Entering DFU mode
 The board doesn't provide a convenient way to enter DFU mode. There are several techniques that can be used to enter DFU mode.
 DFU mode is available on the USB FS connector (CN13)
 * You can short the pads where R42 would be installed (it isn't installed by default) and press the reset button. You should now be able see the board when using ```dfu-util -l```
@@ -44,7 +44,7 @@ Here is a link to a photo of [my modified STM32F7 Disocvery Board](https://www.d
 The white wire connects to R42. CN13 has a USB cable plugged into it. The FTDI board is plugged into D0 (RX) and D1 (TX).
 The red wire connects to 3.3v on R39.
 
-###REPL###
+### REPL
 UART1 from the STM32F7 is connected to the stlink MCU, and until USB-serial is working, the software is configured to have a REPL on UART1. The stlink MCU acts as a USB serial dongle.
 
 I use the following file (which I call 49-stm32.rules):