boards/openmote-b: hook up at86rf215

Openmote-B includes an AT86RF215 radio. This adds support for it.

boards/openmote-b/Makefile.dep

@@ -1,5 +1,13 @@
 ifneq (,$(filter gnrc_netdev_default netdev_default,$(USEMODULE)))
-  USEMODULE += cc2538_rf
+  ifeq (,$(filter cc2538_rf,$(USEMODULE)))
+    USEMODULE += at86rf215
+  endif
+endif
+
+# at86rf215 is hard-wired to sub-GHz, but 2.4 GHz can be switched between
+# at86rf215 and cc2538_rf. Use 2.4 GHz for cc2538_rf if both are used.
+ifeq (at86rf215 cc2538_rf, $(filter at86rf215 cc2538_rf,$(USEMODULE)))
+  DISABLE_MODULE += at86rf215_24ghz
 endif
 
 ifneq (,$(filter saul_default,$(USEMODULE)))

boards/openmote-b/board.c

@@ -36,9 +36,15 @@ void board_init(void)
     gpio_init(RF24_SWITCH_CC2538_PIN, GPIO_OUT);
     gpio_init(RF24_SWITCH_AT86RF215_PIN, GPIO_OUT);
 
-    /* start with cc2538 2.4ghz radio*/
+#ifdef MODULE_CC2538_RF
-    RF24_SWITCH_CC2538_ON;
+    /* use cc2538 2.4ghz radio*/
     RF24_SWITCH_AT86RF215_OFF;
+    RF24_SWITCH_CC2538_ON;
+#else
+    /* use at86rf215 2.4ghz radio*/
+    RF24_SWITCH_CC2538_OFF;
+    RF24_SWITCH_AT86RF215_ON;
+#endif
 
     /* initialize the CPU */
     cpu_init();

boards/openmote-b/include/board.h

@@ -76,6 +76,16 @@
 #define RF24_SWITCH_AT86RF215_TOGGLE (RF_SWITCH_PORT->DATA ^=  RF24_SWITCH_AT86RF215_MASK)
 /** @} */
 
+/**
+ * @name    AT86RF215 configuration
+ * @{
+ */
+#define AT86RF215_PARAM_SPI        SPI_DEV(0)
+#define AT86RF215_PARAM_CS         GPIO_PIN(0, 3) /* A3 */
+#define AT86RF215_PARAM_INT        GPIO_PIN(3, 0) /* D0 */
+#define AT86RF215_PARAM_RESET      GPIO_PIN(3, 1) /* D1 */
+/** @} */
+
 /**
  * @name    xtimer configuration
  * @{