STM32GG Starter Kit: Misc bugfixes for clean compile of the NSH configuration

configs/efm32gg-stk3700/README.txt

@@ -26,9 +26,9 @@ README
 STATUS
 ======
 
-  This README now exists only as some analysis for a port to the EFM32 Giant
-  Gecko Starter Kit.  That port has not yet been developed and I do not now
-  have hardware in hand.  So the status is partially analyzed, but not yet implemented.
+  2014-11-02:  Completed the basic NSH configuration for the EFM32 Giant Gecko
+    Starter Kit.  The hardware is on order and the port will be verified sometime
+    thereafter.
 
 LEDs and Buttons
 ================
@@ -98,7 +98,12 @@ Serial Console
 
    Default Serial Console
    ----------------------
-   UART0 is configured as the default serial console at 115200 8N1
+   LEUART0 is configured as the default serial console at 2400 8N1
+   on pins PD5 and PD4.  It certainly be possible to go to 4800 baud
+   and the documentation claims that 9600 baud is possible (although
+   I am not sure how).
+
+   It should also be possible to use UART0 is configured at 115200 8N1
    on pins PE0 and PE1.
 
    Communication through the Board Controller
@@ -130,7 +135,7 @@ Configurations
   nsh:
   ---
     Configures the NuttShell (nsh) located at apps/examples/nsh.  The
-    Configuration enables the serial interfaces on UART0.  Support for
+    Configuration enables the serial interfaces on LEUART0.  Support for
     built-in applications is enabled, but in the base configuration no
     built-in applications are selected (see NOTES below).
 

configs/efm32gg-stk3700/include/board.h

@@ -240,7 +240,15 @@
 /* Pin routing **************************************************************/
 /* UART0:
  *
- *   To be provided
+ *   The kit contains a board controller that is responsible for performing
+ *   various board level tasks, such as handling the debugger and the Advanced
+ *   Energy Monitor. An interface is provided between the EFM32 and the board
+ *   controller in the form of a UART connection. The connection is enabled by
+ *   setting the EFM_BC_EN (PF7) line high, and using the lines EFM_BC_TX
+ *   (PE0) and EFM_BC_RX (PE1) for communicating.
+ *
+ *   U0_TX #1 PE0 MCU_PE0, UART0_TX #0, EFM_BC_RX, BC_UART_RX
+ *   U0_RX #1 PE1 MCU_PE1, UART0_TX #1, EFM_BC_TX, BC_UART_TX
  */
 
 #define BOARD_UART0_RX_GPIO        (GPIO_PORTE|GPIO_PIN1)
@@ -249,12 +257,13 @@
 
 /* LEUART0:
  *
- *   To be provided
+ *   LEU0_RX #0 PD4 Available on TP121 and EXP pin 12
+ *   LEU0_TX #0 PD5 Available on TP122 and EXP pin 14
  */
 
-#define BOARD_LEUART0_RX_GPIO
-#define BOARD_LEUART0_TX_GPIO
-#define BOARD_LEUART0_ROUTE_LOCATION
+#define BOARD_LEUART0_RX_GPIO        (GPIO_PORTD|GPIO_PIN4)
+#define BOARD_LEUART0_TX_GPIO        (GPIO_PORTD|GPIO_PIN5)
+#define BOARD_LEUART0_ROUTE_LOCATION _LEUART_ROUTE_LOCATION_LOC0
 
 /****************************************************************************
  * Public Function Prototypes