drivers/at24cxxx: eeprom api wrapper for eepreg

drivers/Makefile.dep

@@ -49,6 +49,10 @@ ifneq (,$(filter at24cxxx,$(USEMODULE)))
   USEMODULE += xtimer
 endif
 
+ifneq (,$(filter at24cxxx_eeprom_wrapper,$(USEMODULE)))
+  USEMODULE += at24cxxx
+endif
+
 ifneq (,$(filter at30tse75x,$(USEMODULE)))
   USEMODULE += xtimer
   FEATURES_REQUIRED += periph_i2c

drivers/Makefile.include

@@ -22,6 +22,10 @@ ifneq (,$(filter at24cxxx,$(USEMODULE)))
   USEMODULE_INCLUDE += $(RIOTBASE)/drivers/at24cxxx/include
 endif
 
+ifneq (,$(filter at24cxxx_eeprom_wrapper,$(USEMODULE)))
+  CFLAGS += -DEEPROM_SIZE=0x8000
+endif
+
 ifneq (,$(filter at86rf2xx,$(USEMODULE)))
   USEMODULE_INCLUDES += $(RIOTBASE)/drivers/at86rf2xx/include
 endif

drivers/at24cxxx/Makefile

@@ -1 +1,6 @@
+SRC := $(filter-out eeprom_wrapper.c,$(wildcard *.c))
+
+# enable submodules
+SUBMODULES := 1
+
 include $(RIOTBASE)/Makefile.base

drivers/at24cxxx/eeprom_wrapper.c

@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2019 Otto-von-Guericke-Universität Magdeburg
+ *
+ * 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     drivers_at24cxxx
+ * @{
+ *
+ * @file
+ * @brief       Implementation of expected EEPROM interface, expected by EEPROM registry
+ *
+ * @author      Fabian Hüßler <fabian.huessler@ovgu.de>
+ * @}
+ */
+
+#include "at24cxxx.h"
+
+/**
+ * @brief Wrapper around @see at24cxxx_read_byte that uses
+ * the first parameters in the at24cxxx_params array
+ *
+ * This allows the use of EEPROM registry.
+ *
+ * @param[in] pos      position in EEPROM memory
+ *
+ * @return    Read byte
+ */
+uint8_t eeprom_read_byte(uint32_t pos)
+{
+    return at24cxxx_read_byte(
+        at24cxxx_get_default_dev(), pos);
+}
+
+/**
+ * @brief Wrapper around @see at24cxxx_read that uses
+ * the first parameters in the at24cxxx_params array
+ *
+ * This allows the use of EEPROM registry.
+ *
+ * @param[in] pos       position in EEPROM memory
+ * @param[out] data     read buffer
+ * @param[in] len       requested length to be read
+ *
+ * @return    @p len on success
+ * @return    0 on failure
+ */
+size_t eeprom_read(uint32_t pos, void *data, size_t len)
+{
+    return at24cxxx_read(
+        at24cxxx_get_default_dev(), pos, data, len);
+}
+
+/**
+ * @brief Wrapper around @see at24cxxx_write_byte that uses
+ * the first parameters in the at24cxxx_params array
+ *
+ * This allows the use of EEPROM registry.
+ *
+ * @param[in] pos      position in EEPROM memory
+ * @param[in] data     value to be written
+ */
+void eeprom_write_byte(uint32_t pos,  uint8_t data)
+{
+    at24cxxx_write_byte(
+        at24cxxx_get_default_dev(), pos, data);
+}
+
+/**
+ * @brief Wrapper around @see at24cxxx_write that uses
+ * the first parameters in the at24cxxx_params array
+ *
+ * This allows the use of EEPROM registry.
+ *
+ * @param[in] pos       position in EEPROM memory
+ * @param[in] data      write buffer
+ * @param[in] len       requested length to be written
+ *
+ * @return    number of bytes that have been written
+ * @return    0 on failure
+ */
+size_t eeprom_write(uint32_t pos, const void *data, size_t len)
+{
+    return at24cxxx_write(
+        at24cxxx_get_default_dev(), pos, data, len);
+}
+
+/**
+ * @brief Wrapper around @see at24cxxx_set that uses
+ * the first parameters in the at24cxxx_params array
+ *
+ * This allows the use of EEPROM registry.
+ *
+ * @param[in] pos       position in EEPROM memory
+ * @param[in] val       value to be set
+ * @param[in] len       requested length to be written
+ *
+ * @return    number of bytes that have been written
+ * @return    0 on failure
+ */
+size_t eeprom_set(uint32_t pos, uint8_t val, size_t len)
+{
+    return at24cxxx_set(
+        at24cxxx_get_default_dev(), pos, val, len);
+}
+
+/**
+ * @brief Wrapper around @see at24cxxx_clear that uses
+ * the first parameters in the at24cxxx_params array
+ *
+ * This allows the use of EEPROM registry.
+ *
+ * @param[in] pos       position in EEPROM memory
+ * @param[in] len       requested length to be written
+ *
+ * @return    number of bytes that have been cleared
+ */
+size_t eeprom_clear(uint32_t pos, size_t len)
+{
+    return at24cxxx_clear(
+        at24cxxx_get_default_dev(), pos, len);
+}
+
+/**
+ * @brief Wrapper around @see at24cxxx_erase that uses
+ * the first parameters in the at24cxxx_params array
+ *
+ * This allows the use of EEPROM registry.
+ *
+ * @return    number of bytes that have been cleared
+ */
+size_t eeprom_erase(void)
+{
+    return at24cxxx_erase(
+        at24cxxx_get_default_dev());
+}

makefiles/pseudomodules.inc.mk

@@ -1,6 +1,7 @@
 PSEUDOMODULES += at_urc
 PSEUDOMODULES += at24c128
 PSEUDOMODULES += at24c256%
+PSEUDOMODULES += at24cxxx_eeprom_wrapper
 PSEUDOMODULES += auto_init_gnrc_rpl
 PSEUDOMODULES += can_mbox
 PSEUDOMODULES += can_pm

sys/Makefile.dep

@@ -1,7 +1,3 @@
-ifneq (,$(filter eepreg,$(USEMODULE)))
-  FEATURES_REQUIRED += periph_eeprom
-endif
-
 ifneq (,$(filter i2c_scan,$(USEMODULE)))
   FEATURES_REQUIRED += periph_i2c
 endif