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ac7cfcc358
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@2795 ebee16cc-31ac-478f-84a7-5cbb03baadba
327 lines
10 KiB
C
327 lines
10 KiB
C
/**
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******************************************************************************
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*
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* @file saved_settings.c
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* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
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* @brief RF Module hardware layer
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* @see The GNU Public License (GPL) Version 3
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*
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*****************************************************************************/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <string.h> // memmove, memset
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#include "crc.h"
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#include "gpio_in.h"
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#include "saved_settings.h"
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#include "main.h"
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#if defined(PIOS_COM_DEBUG)
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#define SAVED_SETTINGS_DEBUG
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#endif
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// *****************************************************************
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// default aes 128-bit encryption key
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const uint8_t saved_settings_default_aes_key[16] = {0x65, 0x3b, 0x71, 0x89, 0x4a, 0xf4, 0xc8, 0xcb, 0x18, 0xd4, 0x9b, 0x4d, 0x4a, 0xbe, 0xc8, 0x37};
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// *****************************************************************
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#define pages 1 // number of flash pages to use
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uint32_t eeprom_addr; // the address of the emulated EEPROM area in program flash area
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uint16_t eeprom_page_size; // flash page size
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volatile t_saved_settings saved_settings __attribute__ ((aligned(4))); // a RAM copy of the settings stored in EEPROM
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t_saved_settings tmp_settings __attribute__ ((aligned(4)));
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// *****************************************************************
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// Private functions
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bool saved_settings_page_empty(int page)
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{ // return TRUE if the flash page is emtpy (erased), otherwise return FALSE
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if (page < 0 || page >= pages)
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return FALSE;
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__IO uint32_t *addr = (__IO uint32_t *)(eeprom_addr + eeprom_page_size * page);
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int32_t len = eeprom_page_size / 4;
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for (int32_t i = len; i > 0; i--)
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if (*addr++ != 0xffffffff)
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return FALSE; // the page is not erased
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return TRUE;
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}
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bool saved_settings_settings_empty(uint32_t addr)
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{ // return TRUE if the settings flash area is emtpy (erased), otherwise return FALSE
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__IO uint8_t *p = (__IO uint8_t *)addr;
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for (int32_t i = sizeof(t_saved_settings); i > 0; i--)
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if (*p++ != 0xff)
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return FALSE; // the flash area is not empty/erased
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return TRUE;
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}
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// *****************************************************************
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int32_t saved_settings_read(void)
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{ // look for the last valid settings saved in EEPROM
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uint32_t flash_addr;
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__IO uint8_t *p1;
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uint8_t *p2;
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flash_addr = eeprom_addr;
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if (saved_settings_settings_empty(flash_addr))
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{
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#if defined(SAVED_SETTINGS_DEBUG)
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DEBUG_PRINTF("settings Read, no settings found at %08X\r\n", flash_addr);
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#endif
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return -1; // no settings found at the specified addr
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}
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// copy the data from program flash area into temp settings area
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p1 = (__IO uint8_t *)flash_addr;
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p2 = (uint8_t *)&tmp_settings;
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for (int32_t i = 0; i < sizeof(t_saved_settings); i++)
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*p2++ = *p1++;
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// calculate and check the CRC
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uint32_t crc1 = tmp_settings.crc;
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tmp_settings.crc = 0;
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uint32_t crc2 = updateCRC32Data(0xffffffff, (void *)&tmp_settings, sizeof(t_saved_settings));
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if (crc2 != crc1)
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{
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#if defined(SAVED_SETTINGS_DEBUG)
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DEBUG_PRINTF("settings Read crc error: %08X %08X\r\n", crc1, crc2);
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#endif
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return -2; // error
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}
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memmove((void *)&saved_settings, (void *)&tmp_settings, sizeof(t_saved_settings));
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#if defined(SAVED_SETTINGS_DEBUG)
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DEBUG_PRINTF("settings Read OK!\r\n");
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#endif
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return 0; // OK
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}
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// *****************************************************************
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// Public functions
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int32_t saved_settings_save(void)
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{ // save the settings into EEPROM
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FLASH_Status fs;
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uint32_t flash_addr;
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uint8_t *p1;
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__IO uint8_t *p2;
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uint32_t *p3;
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bool do_save;
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// size of the settings aligned to 4 bytes
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// uint16_t settings_size = (uint16_t)(sizeof(t_saved_settings) + 3) & 0xfffc;
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// address of settings in FLASH area
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flash_addr = eeprom_addr;
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// *****************************************
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// calculate and add the CRC
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saved_settings.crc = 0;
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saved_settings.crc = updateCRC32Data(0xffffffff, (void *)&saved_settings, sizeof(t_saved_settings));
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// *****************************************
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// first check to see if we need to save the settings
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p1 = (uint8_t *)&saved_settings;
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p2 = (__IO uint8_t *)flash_addr;
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do_save = FALSE;
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for (int32_t i = 0; i < sizeof(t_saved_settings); i++)
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{
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if (*p1++ != *p2++)
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{ // we need to save the settings
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do_save = TRUE;
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break;
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}
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}
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if (!do_save)
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{
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#if defined(SAVED_SETTINGS_DEBUG)
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DEBUG_PRINTF("settings already saved OK\r\n");
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#endif
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return 0; // settings already saved .. all OK
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}
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// *****************************************
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// Unlock the Flash Program Erase controller
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FLASH_Unlock();
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if (!saved_settings_page_empty(0))
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{ // erase the page
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#if defined(SAVED_SETTINGS_DEBUG)
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DEBUG_PRINTF("settings erasing page .. ");
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#endif
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fs = FLASH_ErasePage(eeprom_addr);
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if (fs != FLASH_COMPLETE)
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{ // error
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FLASH_Lock();
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#if defined(SAVED_SETTINGS_DEBUG)
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DEBUG_PRINTF("error %d\r\n", fs);
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#endif
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return -1;
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}
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#if defined(SAVED_SETTINGS_DEBUG)
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DEBUG_PRINTF("OK\r\n");
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#endif
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}
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else
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{
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#if defined(SAVED_SETTINGS_DEBUG)
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DEBUG_PRINTF("settings page already erased\r\n");
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#endif
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}
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// *****************************************
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// save the settings into flash area (emulated EEPROM area)
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p1 = (uint8_t *)&saved_settings;
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p3 = (uint32_t *)flash_addr;
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// write 4 bytes at a time into program flash area (emulated EEPROM area)
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for (int32_t i = 0; i < sizeof(t_saved_settings); p3++)
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{
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uint32_t value = 0;
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if (i < sizeof(t_saved_settings)) value |= (uint32_t)*p1++ << 0; else value |= 0x000000ff; i++;
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if (i < sizeof(t_saved_settings)) value |= (uint32_t)*p1++ << 8; else value |= 0x0000ff00; i++;
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if (i < sizeof(t_saved_settings)) value |= (uint32_t)*p1++ << 16; else value |= 0x00ff0000; i++;
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if (i < sizeof(t_saved_settings)) value |= (uint32_t)*p1++ << 24; else value |= 0xff000000; i++;
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fs = FLASH_ProgramWord((uint32_t)p3, value); // write a 32-bit value
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if (fs != FLASH_COMPLETE)
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{
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FLASH_Lock();
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#if defined(SAVED_SETTINGS_DEBUG)
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DEBUG_PRINTF("settings FLASH_ProgramWord error: %d\r\n", fs);
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#endif
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return -2; // error
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}
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}
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// Lock the Flash Program Erase controller
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FLASH_Lock();
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// *****************************************
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// now error check it by reading it back (simple compare)
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p1 = (uint8_t *)&saved_settings;
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p2 = (__IO uint8_t *)flash_addr;
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for (int32_t i = 0; i < sizeof(t_saved_settings); i++)
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{
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if (*p1++ != *p2++)
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{
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#if defined(SAVED_SETTINGS_DEBUG)
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DEBUG_PRINTF("settings WriteSettings compare error\r\n");
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#endif
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return -3; // error
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}
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}
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// *****************************************
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#if defined(SAVED_SETTINGS_DEBUG)
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DEBUG_PRINTF("settings Save OK!\r\n");
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#endif
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return 0; // OK
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}
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void saved_settings_init(void)
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{
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// **********
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// determine emulated EEPROM details
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if (flash_size < 256000)
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eeprom_page_size = 1024; // 1 kByte
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else
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eeprom_page_size = 2048; // 2 kByte
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// place emulated eeprom at end of program flash area
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eeprom_addr = (0x08000000 + flash_size) - (eeprom_page_size * pages);
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#if defined(SAVED_SETTINGS_DEBUG)
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DEBUG_PRINTF("\r\n");
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DEBUG_PRINTF("settings eeprom addr: %08x\r\n", eeprom_addr);
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DEBUG_PRINTF("settings eeprom page size: %u\r\n", eeprom_page_size);
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DEBUG_PRINTF("settings eeprom pages: %u\r\n", pages);
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#endif
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// **********
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// default settings
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memset((void *)&saved_settings, 0xff, sizeof(t_saved_settings));
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saved_settings.mode = MODE_NORMAL;
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saved_settings.destination_id = 0;
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saved_settings.frequency_band = FREQBAND_UNKNOWN;
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saved_settings.rf_xtal_cap = 0x7f;
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saved_settings.aes_enable = FALSE;
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memmove((void *)&saved_settings.aes_key, saved_settings_default_aes_key, sizeof(saved_settings.aes_key));
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saved_settings.serial_baudrate = 57600;
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saved_settings.rts_time = 10; // ms
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// saved_settings.crc = 0;
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// saved_settings.crc = updateCRC32Data(0xffffffff, (void *)&saved_settings, sizeof(t_saved_settings));
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// **********
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// Lock the Flash Program Erase controller
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FLASH_Lock();
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saved_settings_read();
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// **********
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}
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// *****************************************************************
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