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core/lib/settings: Generalized Settings Manager to work on any platform

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This commit moves the Settings Manager from the AVR codebase
into the Contiki core library. Any platform that implements
the Contiki EEPROM API can now use the Settings Manager's
key-value store for storing their persistent configuration info.

The Settings Manager is a EEPROM-based key-value store. Keys
are 16-bit integers and values may be up to 16,383 bytes long.
It is intended to be used to store configuration-related information,
like network settings, radio channels, etc.

 * Robust data format which requires no initialization.
 * Supports multiple values with the same key.
 * Data can be appended without erasing EEPROM.
 * Max size of settings data can be easily increased in the future,
   as long as it doesn't overlap with application data.

The format was inspired by the [OLPC manufacturing data format][].

Since the beginning of EEPROM often contains application-specific
information, the best place to store settings is at the end of EEPROM
(the "top"). Because we are starting at the end of EEPROM, it makes
sense to grow the list of key-value pairs downward, toward the start of
EEPROM.

Each key-value pair is stored in memory in the following format:

Order    | Size     | Name         | Description
--------:|---------:|--------------|-------------------------------
       0 |        2 | `key`        | 16-bit key
      -2 |        1 | `size_check` | One's-complement of next byte
      -3 |   1 or 2 | `size`       | The size of `value`, in bytes
-4 or -5 | variable | `value`      | Value associated with `key`

The end of the key-value pairs is denoted by the first invalid entry.
An invalid entry has any of the following attributes:

 * The `size_check` byte doesn't match the one's compliment of the
   `size` byte (or `size_low` byte).
 * The key has a value of 0x0000.

[OLPC manufacturing data format]: http://wiki.laptop.org/go/Manufacturing_data
This commit is contained in:
Robert Quattlebaum 2012-05-17 09:03:52 -07:00
parent 6ba28bf74f
commit 28a1e40ebd
12 changed files with 1009 additions and 395 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Makefile.include
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@ -60,7 +60,7 @@ SYSTEM = process.c procinit.c autostart.c elfloader.c profile.c \
timetable.c timetable-aggregate.c compower.c serial-line.c
THREADS = mt.c
LIBS = memb.c mmem.c timer.c list.c etimer.c ctimer.c energest.c rtimer.c stimer.c \
print-stats.c ifft.c crc16.c random.c checkpoint.c ringbuf.c
print-stats.c ifft.c crc16.c random.c checkpoint.c ringbuf.c settings.c
DEV = nullradio.c
include $(CONTIKI)/core/net/Makefile.uip

473
core/lib/settings.c Normal file
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@ -0,0 +1,473 @@
/*
* Copyright (c) 2013, Robert Quattlebaum.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
#include "contiki.h"
#include "settings.h"
#include "dev/eeprom.h"
#if CONTIKI_CONF_SETTINGS_MANAGER
#if !EEPROM_CONF_SIZE
#error CONTIKI_CONF_SETTINGS_MANAGER has been set, but EEPROM_CONF_SIZE hasnt!
#endif
#ifndef EEPROM_END_ADDR
#define EEPROM_END_ADDR (EEPROM_CONF_SIZE - 1)
#endif
#ifndef SETTINGS_MAX_SIZE
/** The maximum amount EEPROM dedicated to settings. */
#define SETTINGS_MAX_SIZE (127) /**< Defaults to 127 bytes */
#endif
#ifndef SETTINGS_TOP_ADDR
/** The top address in EEPROM that settings should use. Inclusive. */
#define SETTINGS_TOP_ADDR (settings_iter_t)(EEPROM_END_ADDR)
#endif
#ifndef SETTINGS_BOTTOM_ADDR
/** The lowest address in EEPROM that settings should use. Inclusive. */
#define SETTINGS_BOTTOM_ADDR (SETTINGS_TOP_ADDR + 1 - SETTINGS_MAX_SIZE)
#endif
#ifndef MIN
#define MIN(a,b) ((a)<(b)?a:b)
#endif
typedef struct {
#if SETTINGS_CONF_SUPPORT_LARGE_VALUES
uint8_t size_extra;
#endif
uint8_t size_low;
uint8_t size_check;
settings_key_t key;
} item_header_t;
/*****************************************************************************/
// MARK: - Public Travesal Functions
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
settings_iter_t
settings_iter_begin()
{
return settings_iter_is_valid(SETTINGS_TOP_ADDR) ? SETTINGS_TOP_ADDR : 0;
}
/*---------------------------------------------------------------------------*/
settings_iter_t
settings_iter_next(settings_iter_t ret)
{
if(ret) {
/* A settings iterator always points to the first byte
* after the actual key-value pair in memory. This means that
* the address of our value in EEPROM just happens
* to be the address of our next iterator.
*/
ret = settings_iter_get_value_addr(ret);
return settings_iter_is_valid(ret) ? ret : 0;
}
return SETTINGS_INVALID_ITER;
}
/*---------------------------------------------------------------------------*/
uint8_t
settings_iter_is_valid(settings_iter_t iter)
{
item_header_t header = { 0 };
if(iter == EEPROM_NULL) {
return 0;
}
if(iter < SETTINGS_BOTTOM_ADDR + sizeof(header)) {
return 0;
}
eeprom_read(iter - sizeof(header), (uint8_t *)&header, sizeof(header));
if((uint8_t) header.size_check != (uint8_t) ~ header.size_low) {
return 0;
}
if(iter < SETTINGS_BOTTOM_ADDR + sizeof(header) + settings_iter_get_value_length(iter)) {
return 0;
}
return 1;
}
/*---------------------------------------------------------------------------*/
settings_key_t
settings_iter_get_key(settings_iter_t iter)
{
item_header_t header;
eeprom_read(iter - sizeof(header), (uint8_t *)&header, sizeof(header));
if((uint8_t) header.size_check != (uint8_t)~header.size_low) {
return SETTINGS_INVALID_KEY;
}
return header.key;
}
/*---------------------------------------------------------------------------*/
settings_length_t
settings_iter_get_value_length(settings_iter_t iter)
{
item_header_t header;
settings_length_t ret = 0;
eeprom_read(iter - sizeof(header), (uint8_t *)&header, sizeof(header) );
if((uint8_t)header.size_check == (uint8_t)~header.size_low) {
ret = header.size_low;
#if SETTINGS_CONF_SUPPORT_LARGE_VALUES
if(ret & (1 << 7)) {
ret = ((ret & ~(1 << 7)) << 7) | header.size_extra;
}
#endif
}
return ret;
}
/*---------------------------------------------------------------------------*/
eeprom_addr_t
settings_iter_get_value_addr(settings_iter_t iter)
{
settings_length_t len = settings_iter_get_value_length(iter);
#if SETTINGS_CONF_SUPPORT_LARGE_VALUES
len += (len >= 128);
#endif
return iter - sizeof(item_header_t) - len;
}
/*---------------------------------------------------------------------------*/
settings_length_t
settings_iter_get_value_bytes(settings_iter_t iter, void *bytes,
settings_length_t max_length)
{
max_length = MIN(max_length, settings_iter_get_value_length(iter));
eeprom_read(settings_iter_get_value_addr(iter), bytes, max_length);
return max_length;
}
/*---------------------------------------------------------------------------*/
settings_status_t
settings_iter_delete(settings_iter_t iter)
{
settings_status_t ret = SETTINGS_STATUS_FAILURE;
settings_iter_t next = settings_iter_next(iter);
if(!next) {
/* Special case: we are the last item. we can get away with
* just wiping out our own header.
*/
item_header_t header;
memset(&header, 0xFF, sizeof(header));
eeprom_write(iter - sizeof(header), (uint8_t *)&header, sizeof(header));
ret = SETTINGS_STATUS_OK;
}
/* This case requires the settings store to be shifted.
* Currently unimplemented. TODO: Writeme!
*/
ret = SETTINGS_STATUS_UNIMPLEMENTED;
return ret;
}
/*****************************************************************************/
// MARK: - Public Functions
/*****************************************************************************/
/*---------------------------------------------------------------------------*/
uint8_t
settings_check(settings_key_t key, uint8_t index)
{
uint8_t ret = 0;
settings_iter_t iter;
for(iter = settings_iter_begin(); iter; iter = settings_iter_next(iter)) {
if(settings_iter_get_key(iter) == key) {
if(!index) {
ret = 1;
break;
} else {
index--;
}
}
}
return ret;
}
/*---------------------------------------------------------------------------*/
settings_status_t
settings_get(settings_key_t key, uint8_t index, uint8_t *value,
settings_length_t * value_size)
{
settings_status_t ret = SETTINGS_STATUS_NOT_FOUND;
settings_iter_t iter;
for(iter = settings_iter_begin(); iter; iter = settings_iter_next(iter)) {
if(settings_iter_get_key(iter) == key) {
if(!index) {
/* We found it! */
*value_size = settings_iter_get_value_bytes(iter,
(void *)value,
*value_size);
ret = SETTINGS_STATUS_OK;
break;
} else {
/* Nope, keep looking */
index--;
}
}
}
return ret;
}
/*---------------------------------------------------------------------------*/
settings_status_t
settings_add(settings_key_t key, const uint8_t *value,
settings_length_t value_size)
{
settings_status_t ret = SETTINGS_STATUS_FAILURE;
settings_iter_t iter;
item_header_t header;
/* Find the last item. */
for(iter = settings_iter_begin(); settings_iter_next(iter);
iter = settings_iter_next(iter)) {
/* This block intentionally left blank. */
}
if(iter) {
/* Value address of item is the same as the iterator for next item. */
iter = settings_iter_get_value_addr(iter);
} else {
/* This will be the first setting! */
iter = SETTINGS_TOP_ADDR;
}
if(iter < SETTINGS_BOTTOM_ADDR + value_size + sizeof(header)) {
/* This value is too big to store. */
ret = SETTINGS_STATUS_OUT_OF_SPACE;
goto bail;
}
header.key = key;
if(value_size < 0x80) {
/* If the value size is less than 128, then
* we can get away with only using one byte
* to store the size.
*/
header.size_low = value_size;
}
#if SETTINGS_CONF_SUPPORT_LARGE_VALUES
else if(value_size <= SETTINGS_MAX_VALUE_SIZE) {
/* If the value size is larger than or equal to 128,
* then we need to use two bytes. Store
* the most significant 7 bits in the first
* size byte (with MSB set) and store the
* least significant bits in the second
* byte (with LSB clear)
*/
header.size_low = (value_size >> 7) | 0x80;
header.size_extra = value_size & ~0x80;
}
#endif
else {
/* Value size way too big! */
ret = SETTINGS_STATUS_VALUE_TOO_BIG;
goto bail;
}
header.size_check = ~header.size_low;
/* Write the header first */
eeprom_write(iter - sizeof(header), (uint8_t *)&header, sizeof(header));
/* Sanity check, remove once confident */
if(settings_iter_get_value_length(iter) != value_size) {
goto bail;
}
/* Now write the data */
eeprom_write(settings_iter_get_value_addr(iter), (uint8_t *)value, value_size);
/* This should be the last item. If this is not the case,
* then we need to clear out the phantom setting.
*/
if((iter = settings_iter_next(iter))) {
memset(&header, 0xFF, sizeof(header));
eeprom_write(iter - sizeof(header),(uint8_t *)&header, sizeof(header));
}
ret = SETTINGS_STATUS_OK;
bail:
return ret;
}
/*---------------------------------------------------------------------------*/
settings_status_t
settings_set(settings_key_t key, const uint8_t *value,
settings_length_t value_size)
{
settings_status_t ret = SETTINGS_STATUS_FAILURE;
settings_iter_t iter;
for(iter = settings_iter_begin(); iter; iter = settings_iter_next(iter)) {
if(settings_iter_get_key(iter) == key) {
break;
}
}
if((iter == EEPROM_NULL) || !settings_iter_is_valid(iter)) {
ret = settings_add(key, value, value_size);
goto bail;
}
if(value_size != settings_iter_get_value_length(iter)) {
/* Requires the settings store to be shifted. Currently unimplemented. */
ret = SETTINGS_STATUS_UNIMPLEMENTED;
goto bail;
}
/* Now write the data */
eeprom_write(settings_iter_get_value_addr(iter),
(uint8_t *)value, value_size);
ret = SETTINGS_STATUS_OK;
bail:
return ret;
}
/*---------------------------------------------------------------------------*/
settings_status_t
settings_delete(settings_key_t key, uint8_t index)
{
settings_status_t ret = SETTINGS_STATUS_NOT_FOUND;
settings_iter_t iter;
for(iter = settings_iter_begin(); iter; iter = settings_iter_next(iter)) {
if(settings_iter_get_key(iter) == key) {
if(!index) {
/* We found it! */
ret = settings_iter_delete(iter);
break;
} else {
/* Nope, keep looking */
index--;
}
}
}
return ret;
}
/*---------------------------------------------------------------------------*/
void
settings_wipe(void)
{
/* Simply making the first item invalid will effectively
* clear the key-value store.
*/
const uint32_t x = 0xFFFFFF;
eeprom_write(SETTINGS_TOP_ADDR - sizeof(x), (uint8_t *)&x, sizeof(x));
}
/*****************************************************************************/
// MARK: - Other Functions
/*****************************************************************************/
#if DEBUG
#include <stdio.h>
/*---------------------------------------------------------------------------*/
void
settings_debug_dump(void)
{
settings_iter_t iter;
printf("{\n");
for(iter = settings_iter_begin(); iter; iter = settings_iter_next(iter)) {
settings_length_t len = settings_iter_get_value_length(iter);
eeprom_addr_t addr = settings_iter_get_value_addr(iter);
uint8_t byte;
union {
settings_key_t key;
char bytes[0];
} u;
u.key = settings_iter_get_key(iter);
printf("\t\"%c%c\" = <", u.bytes[0], u.bytes[1]);
for(; len; len--, addr++) {
eeprom_read(addr, &byte, 1);
printf("%02X", byte);
if(len != 1) {
printf(" ");
}
}
printf(">;\n");
}
printf("}\n");
}
#endif /* DEBUG */
#endif /* CONTIKI_CONF_SETTINGS_MANAGER */

360
core/lib/settings.h Normal file
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@ -0,0 +1,360 @@
/*
* Copyright (c) 2013, Robert Quattlebaum
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
#ifndef __CONTIKI_SETTINGS_H__
#define __CONTIKI_SETTINGS_H__
/** @file settings.h
* @brief Settings Manager
* @author Robert Quattlebaum <darco@deepdarc.com>
*
* ## Overview ##
*
* The settings manager is a EEPROM-based key-value store. Keys
* are 16-bit integers and values may be up to 16,383 bytes long.
* It is intended to be used to store configuration-related information,
* like network settings, radio channels, etc.
*
* ## Features ##
*
* * Robust data format which requires no initialization.
* * Supports multiple values with the same key.
* * Data can be appended without erasing EEPROM.
* * Max size of settings data can be easily increased in the future,
* as long as it doesn't overlap with application data.
*
* ## Data Format ##
*
* The format was inspired by OLPC manufacturing data, as described here:
* <http://wiki.laptop.org/go/Manufacturing_data>
*
* Since the beginning of EEPROM often contains application-specific
* information, the best place to store settings is at the end of
* EEPROM. Because we are starting at the end of EEPROM, it makes sense
* to grow the list of key-value pairs downward, toward the start of
* EEPROM.
*
* Each key-value pair is stored in memory in the following format:
* <table>
* <thead>
* <td>Order</td>
* <td>Size<small> (in bytes)</small></td>
* <td>Name</td>
* <td>Description</td>
* </thead>
* <tr>
* <td>0</td>
* <td>2</td>
* <td>key</td>
* <td></td>
* </tr>
* <tr>
* <td>-2</td>
* <td>1</td>
* <td>size_check</td>
* <td>One's-complement of next byte</td>
* </tr>
* <tr>
* <td>-3</td>
* <td>1 or 2</td>
* <td>size</td>
* <td>The size of the value, in bytes.</td>
* </tr>
* <tr>
* <td>-4 or -5</td>
* <td>variable</td>
* <td>value</td>
* </tr>
* </table>
*
* The end of the key-value pairs is denoted by the first invalid entry.
* An invalid entry has any of the following attributes:
*
* * The size_check byte doesn't match the one's compliment
* of the size byte (or size_low byte).
* * The key has a value of 0x0000.
*
*/
#include <stdint.h>
#include <string.h>
#include "dev/eeprom.h"
/*****************************************************************************/
// MARK: - Types
typedef enum {
SETTINGS_STATUS_OK = 0,
SETTINGS_STATUS_FAILURE,
SETTINGS_STATUS_INVALID_ARGUMENT,
SETTINGS_STATUS_NOT_FOUND,
SETTINGS_STATUS_OUT_OF_SPACE,
SETTINGS_STATUS_VALUE_TOO_BIG,
SETTINGS_STATUS_UNIMPLEMENTED,
} settings_status_t;
typedef uint16_t settings_key_t;
typedef uint16_t settings_length_t;
/*****************************************************************************/
// MARK: - Settings Keys
/** Two-character constant macro */
#define TCC(a,b) ((a)+(b)*256)
/* All-capital-letter constants are always contiki-defined. */
#define SETTINGS_KEY_EUI64 TCC('E','8') /**< EUI64 Address, 8 bytes */
#define SETTINGS_KEY_EUI48 TCC('E','6') /*!< MAC Address, 6 bytes */
#define SETTINGS_KEY_CHANNEL TCC('C','H') /*!< Channel number, uint8_t */
#define SETTINGS_KEY_TXPOWER TCC('T','P') /*!< Transmit power, uint8_t */
#define SETTINGS_KEY_PAN_ID TCC('P','N') /*!< PAN ID, uint16_t */
#define SETTINGS_KEY_PAN_ADDR TCC('P','A') /*!< PAN address, uint16_t */
#define SETTINGS_KEY_AES128KEY TCC('S','K') /*!< AES128 key, 16 bytes */
#define SETTINGS_KEY_AES128ENABLED TCC('S','E') /*!< AES128 enabled, bool */
#define SETTINGS_KEY_HOSTNAME TCC('H','N') /*!< Hostname, C-String */
#define SETTINGS_KEY_DOMAINNAME TCC('D','N') /*!< Domainname, C-String */
/*****************************************************************************/
// MARK: - Experimental Settings Keys
#define SETTINGS_KEY_RDC_INDEX TCC('R','D') /*!< RDC index, uint8_t */
#define SETTINGS_KEY_CHANNEL_MASK TCC('C','M') /*!< Channel mask, uint16_t */
/*****************************************************************************/
// MARK: - Constants
/** Use this when you want to retrieve the last item */
#define SETTINGS_LAST_INDEX 0xFF
#define SETTINGS_INVALID_KEY 0xFFFF
#define SETTINGS_INVALID_ITER EEPROM_NULL
#ifndef SETTINGS_CONF_SUPPORT_LARGE_VALUES
#define SETTINGS_CONF_SUPPORT_LARGE_VALUES 0
#endif
#if SETTINGS_CONF_SUPPORT_LARGE_VALUES
#define SETTINGS_MAX_VALUE_SIZE 0x3FFF /* 16383 bytes */
#else
#define SETTINGS_MAX_VALUE_SIZE 0x7F /* 127 bytes */
#endif
/*****************************************************************************/
// MARK: - Settings accessors
/** Fetches the value associated with the given key. */
extern settings_status_t settings_get(settings_key_t key, uint8_t index,
uint8_t *value,
settings_length_t * value_size);
/** Adds the given key-value pair to the end of the settings store. */
extern settings_status_t settings_add(settings_key_t key,
const uint8_t *value,
settings_length_t value_size);
/** Checks to see if the given key exists. */
extern uint8_t settings_check(settings_key_t key, uint8_t index);
/** Reinitializes all of the EEPROM used by settings. */
extern void settings_wipe(void);
/** Sets the value for the given key. If the key already exists in
* the settings store, then its value will be replaced.
*/
extern settings_status_t settings_set(settings_key_t key,
const uint8_t *value,
settings_length_t value_size);
/** Removes the given key (at the given index) from the settings store. */
extern settings_status_t settings_delete(settings_key_t key, uint8_t index);
/*****************************************************************************/
// MARK: - Settings traversal functions
typedef eeprom_addr_t settings_iter_t;
/** Will return extern SETTINGS_INVALID_ITER if the settings store is empty. */
extern settings_iter_t settings_iter_begin();
/** Will return extern SETTINGS_INVALID_ITER if at the end of settings list. */
extern settings_iter_t settings_iter_next(settings_iter_t iter);
extern uint8_t settings_iter_is_valid(settings_iter_t iter);
extern settings_key_t settings_iter_get_key(settings_iter_t iter);
extern settings_length_t settings_iter_get_value_length(settings_iter_t iter);
extern eeprom_addr_t settings_iter_get_value_addr(settings_iter_t iter);
extern settings_length_t settings_iter_get_value_bytes(settings_iter_t item,
void *bytes,
settings_length_t
max_length);
extern settings_status_t settings_iter_delete(settings_iter_t item);
/*****************************************************************************/
// MARK: - inline convenience functions
static CC_INLINE const char *
settings_get_cstr(settings_key_t key, uint8_t index, char *c_str,
settings_length_t c_str_size)
{
/* Save room for the zero termination. */
c_str_size--;
if(settings_get(key, index, (uint8_t *)c_str, &c_str_size) == SETTINGS_STATUS_OK) {
/* Zero terminate. */
c_str[c_str_size] = 0;
} else {
c_str = NULL;
}
return c_str;
}
static CC_INLINE settings_status_t
settings_set_cstr(settings_key_t key, const char* c_str)
{
return settings_set(key, (const uint8_t *)c_str, strlen(c_str));
}
static CC_INLINE settings_status_t
settings_add_cstr(settings_key_t key, const char* c_str)
{
return settings_add(key, (const uint8_t *)c_str, strlen(c_str));
}
static CC_INLINE uint8_t
settings_get_bool_with_default(settings_key_t key, uint8_t index,
uint8_t default_value)
{
uint8_t ret = default_value;
settings_length_t sizeof_uint8 = sizeof(uint8_t);
settings_get(key, index, (uint8_t *)&ret, &sizeof_uint8);
return !!ret;
}
static CC_INLINE uint8_t
settings_get_uint8(settings_key_t key, uint8_t index)
{
uint8_t ret = 0;
settings_length_t sizeof_uint8 = sizeof(uint8_t);
settings_get(key, index, (uint8_t *)&ret, &sizeof_uint8);
return ret;
}
static CC_INLINE settings_status_t
settings_add_uint8(settings_key_t key, uint8_t value)
{
return settings_add(key, (const uint8_t *)&value, sizeof(uint8_t));
}
static CC_INLINE settings_status_t
settings_set_uint8(settings_key_t key, uint8_t value)
{
return settings_set(key, (const uint8_t *)&value, sizeof(uint8_t));
}
static CC_INLINE uint16_t
settings_get_uint16(settings_key_t key, uint8_t index)
{
uint16_t ret = 0;
settings_length_t sizeof_uint16 = sizeof(uint16_t);
settings_get(key, index, (uint8_t *)&ret, &sizeof_uint16);
return ret;
}
static CC_INLINE settings_status_t
settings_add_uint16(settings_key_t key, uint16_t value)
{
return settings_add(key, (const uint8_t *)&value, sizeof(uint16_t));
}
static CC_INLINE settings_status_t
settings_set_uint16(settings_key_t key, uint16_t value)
{
return settings_set(key, (const uint8_t *)&value, sizeof(uint16_t));
}
static CC_INLINE uint32_t
settings_get_uint32(settings_key_t key, uint8_t index)
{
uint32_t ret = 0;
settings_length_t sizeof_uint32 = sizeof(uint32_t);
settings_get(key, index, (uint8_t *)&ret, &sizeof_uint32);
return ret;
}
static CC_INLINE settings_status_t
settings_add_uint32(settings_key_t key, uint32_t value)
{
return settings_add(key, (const uint8_t *)&value, sizeof(uint32_t));
}
static CC_INLINE settings_status_t
settings_set_uint32(settings_key_t key, uint32_t value)
{
return settings_set(key, (const uint8_t *)&value, sizeof(uint32_t));
}
#if __int64_t_defined
static CC_INLINE uint64_t
settings_get_uint64(settings_key_t key, uint8_t index)
{
uint64_t ret = 0;
settings_length_t sizeof_uint64 = sizeof(uint64_t);
settings_get(key, index, (uint8_t *)&ret, &sizeof_uint64);
return ret;
}
static CC_INLINE settings_status_t
settings_add_uint64(settings_key_t key, uint64_t value)
{
return settings_add(key, (const uint8_t *)&value, sizeof(uint64_t));
}
static CC_INLINE settings_status_t
settings_set_uint64(settings_key_t key, uint64_t value)
{
return settings_set(key, (const uint8_t *)&value, sizeof(uint64_t));
}
#endif /* __int64_t_defined */
#endif /* !defined(__CONTIKI_SETTINGS_H__) */

2
cpu/avr/Makefile.avr
View File

@ -13,7 +13,7 @@ CONTIKI_CPU=$(CONTIKI)/cpu/avr
### These directories will be searched for the specified source files
### TARGETLIBS are platform-specific routines in the contiki library path
CONTIKI_CPU_DIRS = . dev
AVR = clock.c mtarch.c eeprom.c flash.c rs232.c leds-arch.c watchdog.c rtimer-arch.c bootloader.c settings.c
AVR = clock.c mtarch.c eeprom.c flash.c rs232.c leds-arch.c watchdog.c rtimer-arch.c bootloader.c
ELFLOADER = elfloader.c elfloader-avr.c symtab-avr.c
TARGETLIBS = random.c leds.c

275
cpu/avr/settings.c
View File

@ -1,275 +0,0 @@
#include <stdbool.h>
//#include <sys/param.h>
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#include <avr/io.h>
#include "settings.h"
#include "dev/eeprom.h"
#include <stdio.h>
#include <avr/pgmspace.h>
#include <avr/eeprom.h>
#include <avr/wdt.h>
#include "contiki.h"
#ifndef SETTINGS_TOP_ADDR
#define SETTINGS_TOP_ADDR (E2END-4) //!< Defaults to end of EEPROM, minus 4 bytes for avrdude erase count
#endif
#ifndef SETTINGS_MAX_SIZE
#define SETTINGS_MAX_SIZE (1024) //!< Defaults to 1KB
#endif
//#pragma mark -
//#pragma mark Private Functions
typedef struct {
uint8_t size_extra;
uint8_t size_low;
uint8_t size_check;
settings_key_t key;
} item_header_t;
inline static bool
settings_is_item_valid_(eeprom_addr_t item_addr) {
item_header_t header = {};
if(item_addr==EEPROM_NULL)
return false;
// if((SETTINGS_TOP_ADDR-item_addr)>=SETTINGS_MAX_SIZE-3)
// return false;
eeprom_read(
item_addr+1-sizeof(header),
(unsigned char*)&header,
sizeof(header)
);
if((uint8_t)header.size_check!=(uint8_t)~header.size_low)
return false;
// TODO: Check length as well
return true;
}
inline static settings_key_t
settings_get_key_(eeprom_addr_t item_addr) {
item_header_t header;
eeprom_read(
item_addr+1-sizeof(header),
(unsigned char*)&header,
sizeof(header)
);
if((uint8_t)header.size_check!=(uint8_t)~header.size_low)
return SETTINGS_INVALID_KEY;
return header.key;
}
inline static size_t
settings_get_value_length_(eeprom_addr_t item_addr) {
item_header_t header;
size_t ret = 0;
eeprom_read(
item_addr+1-sizeof(header),
(unsigned char*)&header,
sizeof(header)
);
if((uint8_t)header.size_check!=(uint8_t)~header.size_low)
goto bail;
ret = header.size_low;
if(ret&(1<<7)) {
ret = ((ret&~(1<<7))<<8) | header.size_extra;
}
bail:
return ret;
}
inline static eeprom_addr_t
settings_get_value_addr_(eeprom_addr_t item_addr) {
size_t len = settings_get_value_length_(item_addr);
if(len>128)
return item_addr+1-sizeof(item_header_t)-len;
return item_addr+1-sizeof(item_header_t)+1-len;
}
inline static eeprom_addr_t
settings_next_item_(eeprom_addr_t item_addr) {
return settings_get_value_addr_(item_addr)-1;
}
//#pragma mark -
//#pragma mark Public Functions
bool
settings_check(settings_key_t key,uint8_t index) {
bool ret = false;
eeprom_addr_t current_item = SETTINGS_TOP_ADDR;
for(current_item=SETTINGS_TOP_ADDR;settings_is_item_valid_(current_item);current_item=settings_next_item_(current_item)) {
if(settings_get_key_(current_item)==key) {
if(!index) {
ret = true;
break;
} else {
// Nope, keep looking
index--;
}
}
}
return ret;
}
settings_status_t
settings_get(settings_key_t key,uint8_t index,unsigned char* value,size_t* value_size) {
settings_status_t ret = SETTINGS_STATUS_NOT_FOUND;
eeprom_addr_t current_item = SETTINGS_TOP_ADDR;
for(current_item=SETTINGS_TOP_ADDR;settings_is_item_valid_(current_item);current_item=settings_next_item_(current_item)) {
if(settings_get_key_(current_item)==key) {
if(!index) {
// We found it!
*value_size = MIN(*value_size,settings_get_value_length_(current_item));
eeprom_read(
settings_get_value_addr_(current_item),
value,
*value_size
);
ret = SETTINGS_STATUS_OK;
break;
} else {
// Nope, keep looking
index--;
}
}
}
return ret;
}
settings_status_t
settings_add(settings_key_t key,const unsigned char* value,size_t value_size) {
settings_status_t ret = SETTINGS_STATUS_FAILURE;
eeprom_addr_t current_item = SETTINGS_TOP_ADDR;
item_header_t header;
// Find end of list
for(current_item=SETTINGS_TOP_ADDR;settings_is_item_valid_(current_item);current_item=settings_next_item_(current_item));
if(current_item==EEPROM_NULL)
goto bail;
// TODO: size check!
header.key = key;
if(value_size<0x80) {
// If the value size is less than 128, then
// we can get away with only using one byte
// as the size.
header.size_low = value_size;
} else if(value_size<=SETTINGS_MAX_VALUE_SIZE) {
// If the value size of larger than 128,
// then we need to use two bytes. Store
// the most significant 7 bits in the first
// size byte (with MSB set) and store the
// least significant bits in the second
// byte (with LSB clear)
header.size_low = (value_size>>7) | 0x80;
header.size_extra = value_size & ~0x80;
} else {
// Value size way too big!
goto bail;
}
header.size_check = ~header.size_low;
// Write the header first
eeprom_write(
current_item+1-sizeof(header),
(unsigned char*)&header,
sizeof(header)
);
// Sanity check, remove once confident
if(settings_get_value_length_(current_item)!=value_size) {
goto bail;
}
// Now write the data
eeprom_write(
settings_get_value_addr_(current_item),
(unsigned char*)value,
value_size
);
ret = SETTINGS_STATUS_OK;
bail:
return ret;
}
settings_status_t
settings_set(settings_key_t key,const unsigned char* value,size_t value_size) {
settings_status_t ret = SETTINGS_STATUS_FAILURE;
eeprom_addr_t current_item = SETTINGS_TOP_ADDR;
for(current_item=SETTINGS_TOP_ADDR;settings_is_item_valid_(current_item);current_item=settings_next_item_(current_item)) {
if(settings_get_key_(current_item)==key) {
break;
}
}
if((current_item==EEPROM_NULL) || !settings_is_item_valid_(current_item)) {
ret = settings_add(key,value,value_size);
goto bail;
}
if(value_size!=settings_get_value_length_(current_item)) {
// Requires the settings store to be shifted. Currently unimplemented.
goto bail;
}
// Now write the data
eeprom_write(
settings_get_value_addr_(current_item),
(unsigned char*)value,
value_size
);
ret = SETTINGS_STATUS_OK;
bail:
return ret;
}
settings_status_t
settings_delete(settings_key_t key,uint8_t index) {
// Requires the settings store to be shifted. Currently unimplemented.
// TODO: Writeme!
return SETTINGS_STATUS_UNIMPLEMENTED;
}
void
settings_wipe(void) {
size_t i = SETTINGS_TOP_ADDR-SETTINGS_MAX_SIZE;
for(;i<=SETTINGS_TOP_ADDR;i++) {
eeprom_write_byte((uint8_t*)i,0xFF);
wdt_reset();
}
}

118
cpu/avr/settings.h
View File

@ -1,118 +0,0 @@
#ifndef __AVR_SETTINGS_H__
#define __AVR_SETTINGS_H__
#include <inttypes.h>
#include <stdlib.h>
#include <stdbool.h>
typedef uint16_t settings_key_t;
#define SETTINGS_KEY_EUI64 'E'*256+'8' //!< Value always 8 bytes long
#define SETTINGS_KEY_EUI48 'E'*256+'6' //!< Value always 8 bytes long
#define SETTINGS_KEY_CHANNEL 'C'*256+'H' //!< Value always 1 byte long
#define SETTINGS_KEY_TXPOWER 'T'*256+'P' //!< Value always 1 byte long
#define SETTINGS_KEY_PAN_ID 'P'*256+'N' //!< Value always 2 bytes long
#define SETTINGS_KEY_PAN_ADDR 'P'*256+'A' //!< Value always 2 bytes long
#define SETTINGS_KEY_AES128KEY 'S'*256+'K' //!< Value always 16 bytes long
#define SETTINGS_KEY_AES128ENABLED 'S'*256+'E' //!< Value always 16 bytes long
typedef enum {
SETTINGS_STATUS_OK=0,
SETTINGS_STATUS_INVALID_ARGUMENT,
SETTINGS_STATUS_NOT_FOUND,
SETTINGS_STATUS_OUT_OF_SPACE,
SETTINGS_STATUS_UNIMPLEMENTED,
SETTINGS_STATUS_FAILURE,
} settings_status_t;
// Use this when you want to retrieve the last item
#define SETTINGS_LAST_INDEX (0xFF)
#define SETTINGS_INVALID_KEY (0x00)
#define SETTINGS_MAX_VALUE_SIZE (0x3FFF) // 16383 bytes
extern settings_status_t settings_get(settings_key_t key,uint8_t index,unsigned char* value,size_t* value_size);
extern settings_status_t settings_add(settings_key_t key,const unsigned char* value,size_t value_size);
extern bool settings_check(settings_key_t key,uint8_t index);
extern void settings_wipe(void);
extern settings_status_t settings_set(settings_key_t key,const unsigned char* value,size_t value_size);
extern settings_status_t settings_delete(settings_key_t key,uint8_t index);
//#pragma mark -
//#pragma mark Inline convenience functions
static inline uint8_t
settings_get_uint8(settings_key_t key,uint8_t index) {
uint8_t ret = 0;
size_t sizeof_uint8 = sizeof(uint8_t);
settings_get(key,index,(unsigned char*)&ret,&sizeof_uint8);
return ret;
}
static inline settings_status_t
settings_add_uint8(settings_key_t key,uint8_t value) {
return settings_add(key,(const unsigned char*)&value,sizeof(uint8_t));
}
static inline settings_status_t
settings_set_uint8(settings_key_t key,uint8_t value) {
return settings_set(key,(const unsigned char*)&value,sizeof(uint8_t));
}
static inline uint16_t
settings_get_uint16(settings_key_t key,uint8_t index) {
uint16_t ret = 0;
size_t sizeof_uint16 = sizeof(uint16_t);
settings_get(key,index,(unsigned char*)&ret,&sizeof_uint16);
return ret;
}
static inline settings_status_t
settings_add_uint16(settings_key_t key,uint16_t value) {
return settings_add(key,(const unsigned char*)&value,sizeof(uint16_t));
}
static inline settings_status_t
settings_set_uint16(settings_key_t key,uint16_t value) {
return settings_set(key,(const unsigned char*)&value,sizeof(uint16_t));
}
static inline uint32_t
settings_get_uint32(settings_key_t key,uint8_t index) {
uint32_t ret = 0;
size_t sizeof_uint32 = sizeof(uint32_t);
settings_get(key,index,(unsigned char*)&ret,&sizeof_uint32);
return ret;
}
static inline settings_status_t
settings_add_uint32(settings_key_t key,uint32_t value) {
return settings_add(key,(const unsigned char*)&value,sizeof(uint32_t));
}
static inline settings_status_t
settings_set_uint32(settings_key_t key,uint32_t value) {
return settings_set(key,(const unsigned char*)&value,sizeof(uint32_t));
}
static inline uint64_t
settings_get_uint64(settings_key_t key,uint8_t index) {
uint64_t ret = 0;
size_t sizeof_uint64 = sizeof(uint64_t);
settings_get(key,index,(unsigned char*)&ret,&sizeof_uint64);
return ret;
}
static inline settings_status_t
settings_add_uint64(settings_key_t key,uint64_t value) {
return settings_add(key,(const unsigned char*)&value,sizeof(uint64_t));
}
static inline settings_status_t
settings_set_uint64(settings_key_t key,uint64_t value) {
return settings_set(key,(const unsigned char*)&value,sizeof(uint64_t));
}
#endif

5
examples/settings-example/Makefile Normal file
View File

@ -0,0 +1,5 @@
CONTIKI_PROJECT = settings-example
all: $(CONTIKI_PROJECT)
CFLAGS += -DCONTIKI_CONF_SETTINGS_MANAGER=1
CONTIKI = ../..
include $(CONTIKI)/Makefile.include

151
examples/settings-example/settings-example.c Normal file
View File

@ -0,0 +1,151 @@
/*
* Copyright (c) 2013, Robert Quattlebaum.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*/
/**
* @file settings-example.c
* @brief Contiki example showing how to use the settings manager.
* @author Robert Quattlebaum <darco@deepdarc.com>
*/
#include "contiki.h"
#include "lib/settings.h"
#include <stdio.h> /* For printf() */
/*---------------------------------------------------------------------------*/
PROCESS(settings_example_process, "Settings Example Process");
AUTOSTART_PROCESSES(&settings_example_process);
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(settings_example_process, ev, data)
{
int i;
settings_status_t status;
settings_iter_t iter;
char hostname[30];
uint16_t panid;
uint16_t channel;
PROCESS_BEGIN();
/*************************************************************************/
/* Basic setting of parameters */
status = settings_set_uint16(SETTINGS_KEY_PAN_ID, 0xABCD);
if(SETTINGS_STATUS_OK != status) {
printf("settings-example: `set` failed: %d\n", status);
}
status = settings_set_uint8(SETTINGS_KEY_CHANNEL, 26);
if(SETTINGS_STATUS_OK != status) {
printf("settings-example: `set` failed: %d\n", status);
}
status = settings_set_cstr(SETTINGS_KEY_HOSTNAME, "contiki.local");
if(SETTINGS_STATUS_OK != status) {
printf("settings-example: `set` failed: %d\n", status);
}
/*************************************************************************/
/* Basic getting of parameters */
panid = settings_get_uint16(SETTINGS_KEY_PAN_ID, 0);
if(0xABCD != panid) {
printf("settings-example: `get` failed: value mismatch.\n");
}
channel = settings_get_uint16(SETTINGS_KEY_CHANNEL, 0);
if(26 != channel) {
printf("settings-example: `get` failed: value mismatch.\n");
}
if(!settings_get_cstr(SETTINGS_KEY_HOSTNAME, 0, hostname, sizeof(hostname))) {
printf("settings-example: `get` failed: settings_get_cstr returned NULL\n");
} else if(strcmp(hostname, "contiki.local") != 0) {
printf("settings-example: `get` failed: value mismatch.\n");
}
/*************************************************************************/
/* Adding multiple values with the same key */
for(i = 0; i < 10; i++) {
settings_add_uint8(TCC('e','x'), i + 20);
}
/*************************************************************************/
/* Reading multiple values with the same key */
for(i = 0; i < 10; i++) {
if(settings_get_uint8(TCC('e', 'x'), i) != i + 20) {
printf("settings-example: `get` failed: value mismatch.\n");
}
}
/*************************************************************************/
/* Iterating thru all settings */
for(iter = settings_iter_begin(); iter; iter = settings_iter_next(iter)) {
settings_length_t len = settings_iter_get_value_length(iter);
eeprom_addr_t addr = settings_iter_get_value_addr(iter);
uint8_t byte;
union {
settings_key_t key;
char bytes[0];
} u;
u.key = settings_iter_get_key(iter);
if(u.bytes[0] >= 32 && u.bytes[0] < 127
&& u.bytes[1] >= 32 && u.bytes[1] < 127
) {
printf("settings-example: [%c%c] = <",u.bytes[0],u.bytes[1]);
} else {
printf("settings-example: <0x%04X> = <",u.key);
}
for(; len; len--, addr++) {
eeprom_read(addr, &byte, 1);
printf("%02X", byte);
if(len != 1) {
printf(" ");
}
}
printf(">\n");
}
printf("settings-example: Done.\n");
PROCESS_END();
}
/*---------------------------------------------------------------------------*/

6
platform/avr-raven/contiki-conf.h
View File

@ -50,6 +50,12 @@
#define F_CPU 8000000UL
#endif
#include <avr/eeprom.h>
/* Skip the last four bytes of the EEPROM, to leave room for things
* like the avrdude erase count and bootloader signaling. */
#define EEPROM_CONF_SIZE ((E2END + 1) - 4)
/* MCU_CONF_LOW_WEAR will remove the signature and eeprom from the .elf file */
/* This reduces reprogramming wear during development */
//#define MCU_CONF_LOW_WEAR 1

6
platform/avr-ravenusb/contiki-conf.h
View File

@ -58,6 +58,12 @@
#include <stdint.h>
#include <string.h>
#include <avr/eeprom.h>
/* Skip the last four bytes of the EEPROM, to leave room for things
* like the avrdude erase count and bootloader signaling. */
#define EEPROM_CONF_SIZE ((E2END + 1) - 4)
/* The AVR tick interrupt usually is done with an 8 bit counter around 128 Hz.
* 125 Hz needs slightly more overhead during the interrupt, as does a 32 bit
* clock_time_t.

5
platform/avr-zigbit/contiki-conf.h
View File

@ -50,6 +50,11 @@
#endif
#include <stdint.h>
#include <avr/eeprom.h>
/* Skip the last four bytes of the EEPROM, to leave room for things
* like the avrdude erase count and bootloader signaling. */
#define EEPROM_CONF_SIZE ((E2END + 1) - 4)
/* The AVR tick interrupt usually is done with an 8 bit counter around 128 Hz.
* 125 Hz needs slightly more overhead during the interrupt, as does a 32 bit

1
regression-tests/01-compile/Makefile
View File

@ -37,6 +37,7 @@ webserver-ipv6/sky \
webserver-ipv6/econotag \
wget/minimal-net \
z1/z1 \
settings-example/avr-raven \
sensinode/sensinode \
sensinode/border-router/sensinode \
sensinode/udp-ipv6/sensinode \