Add basic board support

os/hal/boards/WVSHARE_BLE400/board.c

@@ -0,0 +1,42 @@
+/*
+    Copyright (C) 2015 Fabio Utzig
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+#include "hal.h"
+
+/**
+ * @brief   Early initialization code.
+ * @details This initialization is performed just after reset before BSS and
+ *          DATA segments initialization.
+ */
+void __early_init(void)
+{
+  NRF_GPIO->PIN_CNF[20] = 1;
+  NRF_GPIO->OUTSET = (uint32_t) 1 << 20;
+}
+
+/**
+ * @brief   Late initialization code.
+ * @note    This initialization is performed after BSS and DATA segments
+ *          initialization and before invoking the main() function.
+ */
+void boardInit(void)
+{
+  //FIXME: not really needed yet
+  NRF_CLOCK->XTALFREQ = 0xff;
+  NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
+  NRF_CLOCK->TASKS_HFCLKSTART = 1;
+  while (!NRF_CLOCK->EVENTS_HFCLKSTARTED) {}
+}

os/hal/boards/WVSHARE_BLE400/board.h

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+/*
+    Copyright (C) 2015 Fabio Utzig
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+#ifndef _BOARD_H_
+#define _BOARD_H_
+
+/*
+ * Board identifier.
+ */
+#define BOARD_WVSHARE_BLE400
+#define BOARD_NAME              "WvShare BLE400"
+
+/*
+ * Board oscillators-related settings.
+ */
+#define XTAL_VALUE              16000000
+
+#if !defined(_FROM_ASM_)
+#ifdef __cplusplus
+extern "C" {
+#endif
+  void boardInit(void);
+#ifdef __cplusplus
+}
+#endif
+#endif /* _FROM_ASM_ */
+
+#endif /* _BOARD_H_ */

os/hal/boards/WVSHARE_BLE400/board.mk

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+# List of all the board related files.
+BOARDSRC = ${CHIBIOS}/community/os/hal/boards/WVSHARE_BLE400/board.c
+
+# Required include directories
+BOARDINC = ${CHIBIOS}/community/os/hal/boards/WVSHARE_BLE400