cpu: added common cpu for the nRF5x family

cpu/nrf51/include/periph_cpu.h

-/*
- * Copyright (C) 2015 Freie Universität Berlin
- *
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
- */
-
-/**
- * @ingroup         cpu_nrf51822
- * @{
- *
- * @file
- * @brief           CPU specific definitions for handling peripherals
- *
- * @author          Hauke Petersen <hauke.peterse@fu-berlin.de>
- */
-
-#ifndef CPU_PERIPH_H_
-#define CPU_PERIPH_H_
-
-#include "periph/dev_enums.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/**
- * @brief   Mandatory macro for defining GPIO pins
- *
- * The port definition is used (and zeroed) to suppress compiler warnings
- */
-#define GPIO_PIN(x,y)       ((x & 0) | y)
-
-/**
- * @brief   Length of the CPU_ID in octets
- */
-#define CPUID_LEN           (8U)
-
-/**
- * @brief   Override GPIO pull register select values
- * @{
- */
-#define HAVE_GPIO_PP_T
-typedef enum {
-    GPIO_NOPULL = 0,        /**< do not use internal pull resistors */
-    GPIO_PULLUP = 2,        /**< enable internal pull-up resistor */
-    GPIO_PULLDOWN = 1       /**< enable internal pull-down resistor */
-} gpio_pp_t;
-/** @} */
-
-/**
- * @brief   Override GPIO active flank values
- * @{
- */
-#define HAVE_GPIO_FLANK_T
-typedef enum {
-    GPIO_FALLING = 2,       /**< emit interrupt on falling flank */
-    GPIO_RISING  = 1,       /**< emit interrupt on rising flank */
-    GPIO_BOTH    = 3        /**< emit interrupt on both flanks */
-} gpio_flank_t;
-/** @} */
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif /* CPU_PERIPH_H_ */
-/** @} */

cpu/nrf5x_common/Makefile

+DIRS = periph
+
+include $(RIOTBASE)/Makefile.base

cpu/nrf5x_common/Makefile.include

+# export the CPU family so we can differentiate between them in the code
+FAM = $(shell echo $(CPU_FAM) | tr 'a-z-' 'A-Z_')
+export CFLAGS += -DCPU_FAM_$(FAM)
+
+# export the common include directory
+export INCLUDES += -I$(RIOTCPU)/nrf5x_common/include

cpu/nrf5x_common/doc.txt

+/**
+ * @defgroup    cpu_nrf5x_common
+ * @ingroup     cpu
+ * @brief       Common implementations for the nRF5x family of CPUs
+ */

cpu/nrf52/include/periph_cpu.h → cpu/nrf5x_common/include/periph_cpu.h

 /*
- * Copyright (C) 2016 Freie Universität Berlin
+ * Copyright (C) 2015-2016 Freie Universität Berlin
  *
  * This file is subject to the terms and conditions of the GNU Lesser
  * General Public License v2.1. See the file LICENSE in the top level
@@ -7,7 +7,7 @@
  */
 
 /**
- * @ingroup         cpu_nrf52
+ * @ingroup         cpu_nrf5x_common
  * @{
  *
  * @file

cpu/nrf5x_common/periph/Makefile

+MODULE = periph
+
+include $(RIOTBASE)/Makefile.base