src/main/config/config_streamer_stm32h7.c

   1 /*
   2  * This file is part of Cleanflight.
   3  *
   4  * Cleanflight is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * Cleanflight is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with Cleanflight.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <string.h>
  19 #include "platform.h"
  20 #include "drivers/system.h"
  21 #include "config/config_streamer.h"
  22
  23 #if defined(STM32H7) && !defined(CONFIG_IN_RAM) && !defined(CONFIG_IN_EXTERNAL_FLASH)
  24
  25 #if defined(STM32H743xx)
  26 /* Sectors 0-7 of 128K each */
  27 #define FLASH_PAGE_SIZE     ((uint32_t)0x20000) // 128K sectors
  28 static uint32_t getFLASHSectorForEEPROM(uint32_t address)
  29 {
  30     if (address <= 0x0801FFFF)
  31         return FLASH_SECTOR_0;
  32     if (address <= 0x0803FFFF)
  33         return FLASH_SECTOR_1;
  34     if (address <= 0x0805FFFF)
  35         return FLASH_SECTOR_2;
  36     if (address <= 0x0807FFFF)
  37         return FLASH_SECTOR_3;
  38     if (address <= 0x0809FFFF)
  39         return FLASH_SECTOR_4;
  40     if (address <= 0x080BFFFF)
  41         return FLASH_SECTOR_5;
  42     if (address <= 0x080DFFFF)
  43         return FLASH_SECTOR_6;
  44     if (address <= 0x080FFFFF)
  45         return FLASH_SECTOR_7;
  46
  47     while (1) {
  48         failureMode(FAILURE_FLASH_WRITE_FAILED);
  49     }
  50 }
  51 #elif defined(STM32H750xx)
  52 #  error "STM32750xx only has one flash page which contains the bootloader, no spare flash pages available, use external storage for persistent config or ram for target testing"
  53 #else
  54 #  error "Unsupported CPU!"
  55 #endif
  56
  57 void config_streamer_impl_unlock(void)
  58 {
  59     HAL_FLASH_Unlock();
  60 }
  61
  62 void config_streamer_impl_lock(void)
  63 {
  64     HAL_FLASH_Lock();
  65 }
  66
  67 int config_streamer_impl_write_word(config_streamer_t *c, config_streamer_buffer_align_type_t *buffer)
  68 {
  69     if (c->err != 0) {
  70         return c->err;
  71     }
  72
  73     if (c->address % FLASH_PAGE_SIZE == 0) {
  74         FLASH_EraseInitTypeDef EraseInitStruct = {
  75             .TypeErase     = FLASH_TYPEERASE_SECTORS,
  76             .VoltageRange  = FLASH_VOLTAGE_RANGE_3, // 2.7-3.6V
  77             .NbSectors     = 1,
  78             .Banks         = FLASH_BANK_1
  79         };
  80         EraseInitStruct.Sector = getFLASHSectorForEEPROM(c->address);
  81
  82         uint32_t SECTORError;
  83         const HAL_StatusTypeDef status = HAL_FLASHEx_Erase(&EraseInitStruct, &SECTORError);
  84         if (status != HAL_OK) {
  85             return -1;
  86         }
  87     }
  88
  89     // On H7 HAL_FLASH_Program takes data address, not the raw word value
  90     const HAL_StatusTypeDef status = HAL_FLASH_Program(FLASH_TYPEPROGRAM_FLASHWORD, c->address, (uint32_t)buffer);
  91     if (status != HAL_OK) {
  92         return -2;
  93     }
  94
  95     c->address += CONFIG_STREAMER_BUFFER_SIZE;
  96     return 0;
  97 }
  98
  99 #endif