Edit Step-by-step porting guide.

Added UART configuration.

Inc/murasaki_5_spg.hpp

@@ -6,10 +6,20 @@
 
 /**
  * @page spg Step-by-Step Porting Guide
- * @brief This chapter go though the actual operation of the CubeMX and SW4STM32 to
+ * @brief This chapter goes though the actual operation of the CubeMX and SW4STM32 to
  * create an empty application with Murasaki.
  *
  * @details
+ * To develop your own application, you should create the platform with Murasaki by yourself.
+ * In this chapter, we will see the procedure to create an sample application for the Nucleo F722ZE board.
+ *
+ * The related software versions are :
+ * @li CubeMX ver 5.0.1
+ * @li Sytem Workbench for STM32 ver 1.17.0.201812190825
+ *
+ * First of all, you have to create a new project by CubeMX for Nucleo F722ZE.
+ * This skips how to make that project.
+ *
  * @li @subpage spg_1
  * @li @subpage spg_2
  * @li @subpage spg_3
@@ -23,10 +33,30 @@
  * @brief UART is grouped as connectivity device.
  *
  * @details
+ * Once Nucleo F722ZE is created, let's start to modify it from the UART configuration.
+ * Nucleo F722ZE board utilizes the USART3 peripheral as UART3. And this UART3 port is
+ * connected with ST-Link board. So we can communicate with the application through the
+ * USB by terminal software.
+ *
+ * The Murasaki library support this communication by murasaki::Debugger class.
+ * To use the Debugger class, we have to configure the UART port correctly.
+ *
+ * To configure the UART, select the UART3 peripheral inside the Connectivity category of the
+ * Pinout & Configuration tab( Fig. 1).  The default tab is the Parameter and Setting tab. In this tab, we will configure the
+ * Basic Parameters like Baud rate, word length, etc...
+ *
+ * @image html "Screenshot from 2019-02-18 08-42-34.png" "Fig.1 CubeMX UART panel"
+ * @image latex "Screenshot from 2019-02-18 08-42-34.png" "Fig.1 CubeMX UART panel"
+ *
+ * And then, we configure the DMA. The murasaki::uart class uses the DMA transfer for both
+ * TX and RX. To enable DMA, click the DMA Settings tab and add DMAs. The default state of the
+ * DMA configuration after clicking Add button is undetermine. Then, select TX and RX DMA channel(Fig. 2).
  *
- * @image html "Screenshot from 2019-02-18 08-42-34.png" "CubeMX"
- * @image latex "Screenshot from 2019-02-18 08-42-34.png" "CubeMX"
+ * @image html "Screenshot from 2019-02-18 08-43-41.png" "Fig.2 UART DMA Settings tab"
+ * @image latex "Screenshot from 2019-02-18 08-43-41.png" "Fig.2 UART DMA Settings tab"
  *
+ * @image html "Screenshot from 2019-02-18 08-44-04.png" "Fig.3 UART NVIC Settings tab"
+ * @image latex "Screenshot from 2019-02-18 08-44-04.png" "Fig.3 UART NIC Settings tab"
  */
 
 /**