+++ /dev/null
-/**
- * \file
- * <!--
- * This file is part of BeRTOS.
- *
- * Bertos is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * As a special exception, you may use this file as part of a free software
- * library without restriction. Specifically, if other files instantiate
- * templates or use macros or inline functions from this file, or you compile
- * this file and link it with other files to produce an executable, this
- * file does not by itself cause the resulting executable to be covered by
- * the GNU General Public License. This exception does not however
- * invalidate any other reasons why the executable file might be covered by
- * the GNU General Public License.
- *
- * Copyright 2003, 2004, 2005 Develer S.r.l. (http://www.develer.com/)
- *
- * -->
- *
- * \brief Driver for the 24xx16 and 24xx256 I2C EEPROMS (implementation)
- *
- *
- * \version $Id$
- * \author Stefano Fedrigo <aleph@develer.com>
- * \author Bernardo Innocenti <bernie@develer.com>
- */
-
-#include "eeprom.h"
-
-#include <cfg/macros.h> // MIN()
-#include <cfg/debug.h>
-
-#include <appconfig.h> // CONFIG_EEPROM_VERIFY
-
-#include <cpu/attr.h>
-#include CPU_HEADER(twi)
-
-#include <drv/wdt.h>
-
-#include <mware/byteorder.h> // cpu_to_be16()
-
-#include <string.h> // memset()
-
-
-// Configuration sanity checks
-#if !defined(CONFIG_EEPROM_VERIFY) || (CONFIG_EEPROM_VERIFY != 0 && CONFIG_EEPROM_VERIFY != 1)
- #error CONFIG_EEPROM_VERIFY must be defined to either 0 or 1
-#endif
-
-/**
- * EEPROM ID code
- */
-#define EEPROM_ID 0xA0
-
-/**
- * This macros form the correct slave address for EEPROMs
- */
-#define EEPROM_ADDR(x) (EEPROM_ID | (((uint8_t)(x)) << 1))
-
-
-
-
-/**
- * Copy \c count bytes from buffer \c buf to
- * eeprom at address \c addr.
- */
-static bool eeprom_writeRaw(e2addr_t addr, const void *buf, size_t count)
-{
- bool result = true;
- ASSERT(addr + count <= EEPROM_SIZE);
-
- while (count && result)
- {
- /*
- * Split write in multiple sequential mode operations that
- * don't cross page boundaries.
- */
- size_t size =
- MIN(count, (size_t)(EEPROM_BLKSIZE - (addr & (EEPROM_BLKSIZE - 1))));
-
- #if CONFIG_EEPROM_TYPE == EEPROM_24XX16
- /*
- * The 24LC16 uses the slave address as a 3-bit
- * block address.
- */
- uint8_t blk_addr = (uint8_t)((addr >> 8) & 0x07);
- uint8_t blk_offs = (uint8_t)addr;
-
- result =
- twi_start_w(EEPROM_ADDR(blk_addr))
- && twi_send(&blk_offs, sizeof blk_offs)
- && twi_send(buf, size);
-
- #elif CONFIG_EEPROM_TYPE == EEPROM_24XX256
-
- // 24LC256 wants big-endian addresses
- uint16_t addr_be = cpu_to_be16(addr);
-
- result =
- twi_start_w(EEPROM_ID)
- && twi_send((uint8_t *)&addr_be, sizeof addr_be)
- && twi_send(buf, size);
-
- #else
- #error Unknown device type
- #endif
-
- twi_stop();
-
- // DEBUG
- //kprintf("addr=%d, count=%d, size=%d, *#?=%d\n",
- // addr, count, size,
- // (EEPROM_BLKSIZE - (addr & (EEPROM_BLKSIZE - 1)))
- //);
-
- /* Update count and addr for next operation */
- count -= size;
- addr += size;
- buf = ((const char *)buf) + size;
- }
-
- if (!result)
- TRACEMSG("Write error!");
- return result;
-}
-
-
-#if CONFIG_EEPROM_VERIFY
-/**
- * Check that the contents of an EEPROM range
- * match with a provided data buffer.
- *
- * \return true on success.
- */
-static bool eeprom_verify(e2addr_t addr, const void *buf, size_t count)
-{
- uint8_t verify_buf[16];
- bool result = true;
-
- while (count && result)
- {
- /* Split read in smaller pieces */
- size_t size = MIN(count, sizeof verify_buf);
-
- /* Read back buffer */
- if (eeprom_read(addr, verify_buf, size))
- {
- if (memcmp(buf, verify_buf, size) != 0)
- {
- TRACEMSG("Data mismatch!");
- result = false;
- }
- }
- else
- {
- TRACEMSG("Read error!");
- result = false;
- }
-
- /* Update count and addr for next operation */
- count -= size;
- addr += size;
- buf = ((const char *)buf) + size;
- }
-
- return result;
-}
-#endif /* CONFIG_EEPROM_VERIFY */
-
-
-bool eeprom_write(e2addr_t addr, const void *buf, size_t count)
-{
-#if CONFIG_EEPROM_VERIFY
- int retries = 5;
-
- while (retries--)
- if (eeprom_writeRaw(addr, buf, count)
- && eeprom_verify(addr, buf, count))
- return true;
-
- return false;
-
-#else /* !CONFIG_EEPROM_VERIFY */
- return eeprom_writeRaw(addr, buf, count);
-#endif /* !CONFIG_EEPROM_VERIFY */
-}
-
-
-/**
- * Copy \c count bytes at address \c addr
- * from eeprom to RAM to buffer \c buf.
- *
- * \return true on success.
- */
-bool eeprom_read(e2addr_t addr, void *buf, size_t count)
-{
- ASSERT(addr + count <= EEPROM_SIZE);
-
-#if CONFIG_EEPROM_TYPE == EEPROM_24XX16
- /*
- * The 24LC16 uses the slave address as a 3-bit
- * block address.
- */
- uint8_t blk_addr = (uint8_t)((addr >> 8) & 0x07);
- uint8_t blk_offs = (uint8_t)addr;
-
- bool res =
- twi_start_w(EEPROM_ADDR(blk_addr))
- && twi_send(&blk_offs, sizeof blk_offs)
- && twi_start_r(EEPROM_ADDR(blk_addr))
- && twi_recv(buf, count);
-
-#elif CONFIG_EEPROM_TYPE == EEPROM_24XX256
-
- // 24LC256 wants big-endian addresses
- addr = cpu_to_be16(addr);
-
- bool res =
- twi_start_w(EEPROM_ID)
- && twi_send((uint8_t *)&addr, sizeof(addr))
- && twi_start_r(EEPROM_ID)
- && twi_recv(buf, count);
-#else
- #error Unknown device type
-#endif
-
- twi_stop();
-
- if (!res)
- TRACEMSG("Read error!");
- return res;
-}
-
-
-/**
- * Write a single character \a c at address \a addr.
- */
-bool eeprom_write_char(e2addr_t addr, char c)
-{
- return eeprom_write(addr, &c, 1);
-}
-
-
-/**
- * Read a single character at address \a addr.
- *
- * \return the requested character or -1 in case of failure.
- */
-int eeprom_read_char(e2addr_t addr)
-{
- char c;
-
- if (eeprom_read(addr, &c, 1))
- return c;
- else
- return -1;
-}
-
-
-/**
- * Erase specified part of eeprom, writing 0xFF.
- *
- * \param addr starting address
- * \param count length of block to erase
- */
-void eeprom_erase(e2addr_t addr, size_t count)
-{
- uint8_t buf[EEPROM_BLKSIZE];
- memset(buf, 0xFF, sizeof buf);
-
- // Clear all but struct hw_info at start of eeprom
- while (count)
- {
- // Long operation, reset watchdog
- wdt_reset();
-
- size_t size = MIN(count, sizeof buf);
- eeprom_write(addr, buf, size);
- addr += size;
- count -= size;
- }
-}
-
-
-/**
- * Initialize TWI module.
- */
-void eeprom_init(void)
-{
- twi_init();
-}
-
-
-#ifdef _DEBUG
-
-#include <string.h>
-
-void eeprom_test(void)
-{
- static const char magic[14] = "Humpty Dumpty";
- char buf[sizeof magic];
- size_t i;
-
- // Write something to EEPROM using unaligned sequential writes
- for (i = 0; i < 42; ++i)
- {
- wdt_reset();
- eeprom_write(i * sizeof magic, magic, sizeof magic);
- }
-
- // Read back with single-byte reads
- for (i = 0; i < 42 * sizeof magic; ++i)
- {
- wdt_reset();
- eeprom_read(i, buf, 1);
- kprintf("EEPROM byte read: %c (%d)\n", buf[0], buf[0]);
- ASSERT(buf[0] == magic[i % sizeof magic]);
- }
-
- // Read back again using sequential reads
- for (i = 0; i < 42; ++i)
- {
- wdt_reset();
- memset(buf, 0, sizeof buf);
- eeprom_read(i * sizeof magic, buf, sizeof magic);
- kprintf("EEPROM seq read @ 0x%x: '%s'\n", i * sizeof magic, buf);
- ASSERT(memcmp(buf, magic, sizeof magic) == 0);
- }
-}
-
-#endif // _DEBUG
+++ /dev/null
-/**
- * \file
- * <!--
- * This file is part of BeRTOS.
- *
- * Bertos is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * As a special exception, you may use this file as part of a free software
- * library without restriction. Specifically, if other files instantiate
- * templates or use macros or inline functions from this file, or you compile
- * this file and link it with other files to produce an executable, this
- * file does not by itself cause the resulting executable to be covered by
- * the GNU General Public License. This exception does not however
- * invalidate any other reasons why the executable file might be covered by
- * the GNU General Public License.
- *
- * Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
- * All Rights Reserved.
- * -->
- *
- * \brief Driver for the 24xx16 and 24xx256 I2C EEPROMS (interface)
- *
- * \version $Id$
- *
- * \author Stefano Fedrigo <aleph@develer.com>
- * \author Bernardo Innocenti <bernie@develer.com>
- *
- */
-
-#ifndef DRV_EEPROM_H
-#define DRV_EEPROM_H
-
-#include <cfg/compiler.h>
-#include <appconfig.h>
-
-/**
- * \name Values for CONFIG_EEPROM_TYPE
- * \{
- */
-#define EEPROM_24XX16 1
-#define EEPROM_24XX256 2
-/*\}*/
-
-#if CONFIG_EEPROM_TYPE == EEPROM_24XX16
- #define EEPROM_BLKSIZE 0x10 ///< Eeprom block size (16byte)
- #define EEPROM_SIZE 0x800 ///< Eeprom total size (2kB)
-#elif CONFIG_EEPROM_TYPE == EEPROM_24XX256
- #define EEPROM_BLKSIZE 0x40 ///< Eeprom block size (64byte)
- #define EEPROM_SIZE 0x8000 ///< Eeprom total size (32kB)
-#else
- #error Unsupported EEPROM type.
-#endif
-
-/// Type for EEPROM addresses
-typedef uint16_t e2addr_t;
-
-/**
- * Macro for E2Layout offset calculation
- *
- * \note We can't just use offsetof() here because we could use
- * non-constant expressions to access array elements.
- *
- * \note 'type' is the structure type holding eeprom layout
- * and must be defined in user files.
- */
-#define e2addr(type, field) ((e2addr_t)&(((type *)0)->field))
-
-
-bool eeprom_write(e2addr_t addr, const void *buf, size_t count);
-bool eeprom_read(e2addr_t addr, void *buf, size_t count);
-bool eeprom_write_char(e2addr_t addr, char c);
-int eeprom_read_char(e2addr_t addr);
-void eeprom_erase(e2addr_t addr, size_t count);
-void eeprom_init(void);
-void eeprom_test(void);
-
-#endif /* DRV_EEPROM_H */
--- /dev/null
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction. Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License. This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2003, 2004, 2005 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief Driver for the 24xx16 and 24xx256 I2C EEPROMS (implementation)
+ *
+ *
+ * \version $Id$
+ * \author Stefano Fedrigo <aleph@develer.com>
+ * \author Bernardo Innocenti <bernie@develer.com>
+ */
+
+#include "eeprom.h"
+
+#include <cfg/macros.h> // MIN()
+#include <cfg/debug.h>
+
+#include <appconfig.h> // CONFIG_EEPROM_VERIFY
+
+#include <cpu/attr.h>
+#include CPU_HEADER(twi)
+
+#include <drv/wdt.h>
+
+#include <mware/byteorder.h> // cpu_to_be16()
+
+#include <string.h> // memset()
+
+
+// Configuration sanity checks
+#if !defined(CONFIG_EEPROM_VERIFY) || (CONFIG_EEPROM_VERIFY != 0 && CONFIG_EEPROM_VERIFY != 1)
+ #error CONFIG_EEPROM_VERIFY must be defined to either 0 or 1
+#endif
+
+/**
+ * EEPROM ID code
+ */
+#define EEPROM_ID 0xA0
+
+/**
+ * This macros form the correct slave address for EEPROMs
+ */
+#define EEPROM_ADDR(x) (EEPROM_ID | (((uint8_t)(x)) << 1))
+
+
+
+
+/**
+ * Copy \c count bytes from buffer \c buf to
+ * eeprom at address \c addr.
+ */
+static bool eeprom_writeRaw(e2addr_t addr, const void *buf, size_t count)
+{
+ bool result = true;
+ ASSERT(addr + count <= EEPROM_SIZE);
+
+ while (count && result)
+ {
+ /*
+ * Split write in multiple sequential mode operations that
+ * don't cross page boundaries.
+ */
+ size_t size =
+ MIN(count, (size_t)(EEPROM_BLKSIZE - (addr & (EEPROM_BLKSIZE - 1))));
+
+ #if CONFIG_EEPROM_TYPE == EEPROM_24XX16
+ /*
+ * The 24LC16 uses the slave address as a 3-bit
+ * block address.
+ */
+ uint8_t blk_addr = (uint8_t)((addr >> 8) & 0x07);
+ uint8_t blk_offs = (uint8_t)addr;
+
+ result =
+ twi_start_w(EEPROM_ADDR(blk_addr))
+ && twi_send(&blk_offs, sizeof blk_offs)
+ && twi_send(buf, size);
+
+ #elif CONFIG_EEPROM_TYPE == EEPROM_24XX256
+
+ // 24LC256 wants big-endian addresses
+ uint16_t addr_be = cpu_to_be16(addr);
+
+ result =
+ twi_start_w(EEPROM_ID)
+ && twi_send((uint8_t *)&addr_be, sizeof addr_be)
+ && twi_send(buf, size);
+
+ #else
+ #error Unknown device type
+ #endif
+
+ twi_stop();
+
+ // DEBUG
+ //kprintf("addr=%d, count=%d, size=%d, *#?=%d\n",
+ // addr, count, size,
+ // (EEPROM_BLKSIZE - (addr & (EEPROM_BLKSIZE - 1)))
+ //);
+
+ /* Update count and addr for next operation */
+ count -= size;
+ addr += size;
+ buf = ((const char *)buf) + size;
+ }
+
+ if (!result)
+ TRACEMSG("Write error!");
+ return result;
+}
+
+
+#if CONFIG_EEPROM_VERIFY
+/**
+ * Check that the contents of an EEPROM range
+ * match with a provided data buffer.
+ *
+ * \return true on success.
+ */
+static bool eeprom_verify(e2addr_t addr, const void *buf, size_t count)
+{
+ uint8_t verify_buf[16];
+ bool result = true;
+
+ while (count && result)
+ {
+ /* Split read in smaller pieces */
+ size_t size = MIN(count, sizeof verify_buf);
+
+ /* Read back buffer */
+ if (eeprom_read(addr, verify_buf, size))
+ {
+ if (memcmp(buf, verify_buf, size) != 0)
+ {
+ TRACEMSG("Data mismatch!");
+ result = false;
+ }
+ }
+ else
+ {
+ TRACEMSG("Read error!");
+ result = false;
+ }
+
+ /* Update count and addr for next operation */
+ count -= size;
+ addr += size;
+ buf = ((const char *)buf) + size;
+ }
+
+ return result;
+}
+#endif /* CONFIG_EEPROM_VERIFY */
+
+
+bool eeprom_write(e2addr_t addr, const void *buf, size_t count)
+{
+#if CONFIG_EEPROM_VERIFY
+ int retries = 5;
+
+ while (retries--)
+ if (eeprom_writeRaw(addr, buf, count)
+ && eeprom_verify(addr, buf, count))
+ return true;
+
+ return false;
+
+#else /* !CONFIG_EEPROM_VERIFY */
+ return eeprom_writeRaw(addr, buf, count);
+#endif /* !CONFIG_EEPROM_VERIFY */
+}
+
+
+/**
+ * Copy \c count bytes at address \c addr
+ * from eeprom to RAM to buffer \c buf.
+ *
+ * \return true on success.
+ */
+bool eeprom_read(e2addr_t addr, void *buf, size_t count)
+{
+ ASSERT(addr + count <= EEPROM_SIZE);
+
+#if CONFIG_EEPROM_TYPE == EEPROM_24XX16
+ /*
+ * The 24LC16 uses the slave address as a 3-bit
+ * block address.
+ */
+ uint8_t blk_addr = (uint8_t)((addr >> 8) & 0x07);
+ uint8_t blk_offs = (uint8_t)addr;
+
+ bool res =
+ twi_start_w(EEPROM_ADDR(blk_addr))
+ && twi_send(&blk_offs, sizeof blk_offs)
+ && twi_start_r(EEPROM_ADDR(blk_addr))
+ && twi_recv(buf, count);
+
+#elif CONFIG_EEPROM_TYPE == EEPROM_24XX256
+
+ // 24LC256 wants big-endian addresses
+ addr = cpu_to_be16(addr);
+
+ bool res =
+ twi_start_w(EEPROM_ID)
+ && twi_send((uint8_t *)&addr, sizeof(addr))
+ && twi_start_r(EEPROM_ID)
+ && twi_recv(buf, count);
+#else
+ #error Unknown device type
+#endif
+
+ twi_stop();
+
+ if (!res)
+ TRACEMSG("Read error!");
+ return res;
+}
+
+
+/**
+ * Write a single character \a c at address \a addr.
+ */
+bool eeprom_write_char(e2addr_t addr, char c)
+{
+ return eeprom_write(addr, &c, 1);
+}
+
+
+/**
+ * Read a single character at address \a addr.
+ *
+ * \return the requested character or -1 in case of failure.
+ */
+int eeprom_read_char(e2addr_t addr)
+{
+ char c;
+
+ if (eeprom_read(addr, &c, 1))
+ return c;
+ else
+ return -1;
+}
+
+
+/**
+ * Erase specified part of eeprom, writing 0xFF.
+ *
+ * \param addr starting address
+ * \param count length of block to erase
+ */
+void eeprom_erase(e2addr_t addr, size_t count)
+{
+ uint8_t buf[EEPROM_BLKSIZE];
+ memset(buf, 0xFF, sizeof buf);
+
+ // Clear all but struct hw_info at start of eeprom
+ while (count)
+ {
+ // Long operation, reset watchdog
+ wdt_reset();
+
+ size_t size = MIN(count, sizeof buf);
+ eeprom_write(addr, buf, size);
+ addr += size;
+ count -= size;
+ }
+}
+
+
+/**
+ * Initialize TWI module.
+ */
+void eeprom_init(void)
+{
+ twi_init();
+}
+
+
+#ifdef _DEBUG
+
+#include <string.h>
+
+void eeprom_test(void)
+{
+ static const char magic[14] = "Humpty Dumpty";
+ char buf[sizeof magic];
+ size_t i;
+
+ // Write something to EEPROM using unaligned sequential writes
+ for (i = 0; i < 42; ++i)
+ {
+ wdt_reset();
+ eeprom_write(i * sizeof magic, magic, sizeof magic);
+ }
+
+ // Read back with single-byte reads
+ for (i = 0; i < 42 * sizeof magic; ++i)
+ {
+ wdt_reset();
+ eeprom_read(i, buf, 1);
+ kprintf("EEPROM byte read: %c (%d)\n", buf[0], buf[0]);
+ ASSERT(buf[0] == magic[i % sizeof magic]);
+ }
+
+ // Read back again using sequential reads
+ for (i = 0; i < 42; ++i)
+ {
+ wdt_reset();
+ memset(buf, 0, sizeof buf);
+ eeprom_read(i * sizeof magic, buf, sizeof magic);
+ kprintf("EEPROM seq read @ 0x%x: '%s'\n", i * sizeof magic, buf);
+ ASSERT(memcmp(buf, magic, sizeof magic) == 0);
+ }
+}
+
+#endif // _DEBUG
--- /dev/null
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction. Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License. This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
+ * All Rights Reserved.
+ * -->
+ *
+ * \brief Driver for the 24xx16 and 24xx256 I2C EEPROMS (interface)
+ *
+ * \version $Id$
+ *
+ * \author Stefano Fedrigo <aleph@develer.com>
+ * \author Bernardo Innocenti <bernie@develer.com>
+ *
+ */
+
+#ifndef DRV_EEPROM_H
+#define DRV_EEPROM_H
+
+#include <cfg/compiler.h>
+#include <appconfig.h>
+
+/**
+ * \name Values for CONFIG_EEPROM_TYPE
+ * \{
+ */
+#define EEPROM_24XX16 1
+#define EEPROM_24XX256 2
+/*\}*/
+
+#if CONFIG_EEPROM_TYPE == EEPROM_24XX16
+ #define EEPROM_BLKSIZE 0x10 ///< Eeprom block size (16byte)
+ #define EEPROM_SIZE 0x800 ///< Eeprom total size (2kB)
+#elif CONFIG_EEPROM_TYPE == EEPROM_24XX256
+ #define EEPROM_BLKSIZE 0x40 ///< Eeprom block size (64byte)
+ #define EEPROM_SIZE 0x8000 ///< Eeprom total size (32kB)
+#else
+ #error Unsupported EEPROM type.
+#endif
+
+/// Type for EEPROM addresses
+typedef uint16_t e2addr_t;
+
+/**
+ * Macro for E2Layout offset calculation
+ *
+ * \note We can't just use offsetof() here because we could use
+ * non-constant expressions to access array elements.
+ *
+ * \note 'type' is the structure type holding eeprom layout
+ * and must be defined in user files.
+ */
+#define e2addr(type, field) ((e2addr_t)&(((type *)0)->field))
+
+
+bool eeprom_write(e2addr_t addr, const void *buf, size_t count);
+bool eeprom_read(e2addr_t addr, void *buf, size_t count);
+bool eeprom_write_char(e2addr_t addr, char c);
+int eeprom_read_char(e2addr_t addr);
+void eeprom_erase(e2addr_t addr, size_t count);
+void eeprom_init(void);
+void eeprom_test(void);
+
+#endif /* DRV_EEPROM_H */
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