refractor board and start to add support for SWO retarget

demos/bsp/boards/board.h

@@ -57,31 +57,38 @@
 
 #include <stdint.h>
 
-#define BSP_TICKS_PER_SECOND 1000
-#define BSP_UART_ENABLE      1
-#define BSP_UART_BAUDRATE    115200
+#define BOARD_AT86RF2XX             0
+#define BOARD_LPCXPRESSO1347        1
+#define BOARD_NGX4330               2
 
-
-/// n-th Bit
-#ifndef BIT_
-#define BIT_(n) (1 << (n))
-#endif
-
-#define BOARD_AT86RF2XX      0
-#define BOARD_LPCXPRESSO1347 1
-#define BOARD_NGX4330        2
+#define PRINTF_TARGET_DEBUG_CONSOLE 0 // IDE semihosting console
+#define PRINTF_TARGET_UART          1
+#define PRINTF_TARGET_SWO           2 // aka SWV, ITM
 
 #if BOARD == BOARD_NGX4330
-
+ #include "board_ngx4330.h"
 #elif BOARD == BOARD_LPCXPRESSO1347
-
+ #include "board_lpcxpresso1347.h"
 #elif BOARD == BOARD_AT86RF2XX
-
+ #include "board_at86rf2xx.h"
 #else
   #error BOARD is not defined or supported yet
 #endif
 
-/// Init board peripherals : Clock, UART, LEDs, Buttons
+//--------------------------------------------------------------------+
+// Common Configuration
+//--------------------------------------------------------------------+
+#define CFG_TICKS_PER_SECOND 1000
+
+#if CFG_PRINTF_TARGET == PRINTF_TARGET_UART
+  #define CFG_UART_ENABLE      1
+  #define CFG_UART_BAUDRATE    115200
+#endif
+
+//--------------------------------------------------------------------+
+// Board Common API
+//--------------------------------------------------------------------+
+// Init board peripherals : Clock, UART, LEDs, Buttons
 void board_init(void);
 void board_leds(uint32_t mask, uint32_t state);
 uint32_t board_uart_send(uint8_t *buffer, uint32_t length);