add more options.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@109 bbd45198-f89e-11dd-88c7-29a3b14d5316

bsp/stm3210/board.h

@@ -38,6 +38,10 @@
 #define STM32_SRAM_SIZE         64
 #define STM32_SRAM_END          (0x20000000 + STM32_SRAM_SIZE * 1024)
 
+// <o> Console on USART: <0=> no console <1=>USART 1 <2=>USART 2 <3=> USART 3
+// 	<i>Default: 1
+#define STM32_CONSOLE_USART		1
+
 void rt_hw_board_led_on(int n);
 void rt_hw_board_led_off(int n);
 void rt_hw_board_init(void);