add ota algorithm for device

1. effective "Differential Upgrade" patch algorithm with high compression rate
2. effective recovery algorithm support recovery firmware in blocks which has low memory consumption and wear-leveling strategies, especially suitable for embeded devices with low RAM.
3. add sample ota bootloader project, see:
board\TencentOS_tiny_EVB_MX_Plus\KEIL\ota\ota_bootloader_recovery
4. add sample application project for download firmware through http, see:
board\TencentOS_tiny_EVB_MX_Plus\KEIL\ota\ota_application_download_through_http
5. add sample application project for download firmware through qcloud explorer console, see:
board\TencentOS_tiny_EVB_MX_Plus\KEIL\ota\ota_application_download_through_qcloud_iot_explorer
6. an OTA markdown document is pending

board/STM8L052R8T6/IAR/shell/README.md

 - set your uart's baudrate to 9600, too high may not work
 
-- replace all the tos_mmheap_alloc in tos_shell.c with malloc
-
-  replace all the tos_mmheap_free in tos_shell.c with free
-
-  That means we would not use tos_mmheap in STM8
\ No newline at end of file
+- disable TOS_CFG_MMHEAP_EN
\ No newline at end of file

board/TencentOS_tiny_EVB_MX_Plus/BSP/Hardware/ONCHIP_FLASH/onchip_flash.c

+#include "tos_k.h"
 #include "stm32l4xx.h"
 
 #define SECTOR_SIZE                 2048         // sector size for stm32l431RCTX

board/TencentOS_tiny_EVB_MX_Plus/BSP/Hardware/ONCHIP_FLASH/onchip_flash_ota.c

-#include "tos_ota_download.h"
+#include "ota_flash.h"
 #include "onchip_flash.h"
 
 #define ONCHIP_FLASH_ADDR_START     0x08000000  // start address for onchip flash for stm32l431RCTX
@@ -8,7 +8,7 @@
 #define SECTOR_SIZE_LOG2            11  // 2 ^ 11 = 2048
 
 #define FOR_OTA_FLASH_SIZE           (2 * SECTOR_SIZE)  // storage for OTA
-#define FOR_OTA_FLASH_START          0x803d000
+#define FOR_OTA_FLASH_START          0x801e000
 
 ota_flash_drv_t stm32l4_norflash_onchip_drv_ota = {
     .write  = stm32l4_norflash_onchip_write,
@@ -19,7 +19,5 @@ ota_flash_drv_t stm32l4_norflash_onchip_drv_ota = {
 ota_flash_prop_t stm32l4_norflash_onchip_prop_ota = {
     .sector_size_log2   = SECTOR_SIZE_LOG2,
     .pgm_type           = OTA_FLASH_PROGRAM_TYPE_DOUBLEWORD,
-    .flash_start        = FOR_OTA_FLASH_START,
-    .flash_size         = FOR_OTA_FLASH_SIZE,
 };
 

board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/startup_stm32l431xx.s

+;********************** COPYRIGHT(c) 2017  STMicroelectronics ******************
+;* File Name          : startup_stm32l431xx.s
+;* Author             : MCD Application Team
+;* Description        : STM32L431xx Ultra Low Power devices vector table for MDK-ARM toolchain.
+;*                      This module performs:
+;*                      - Set the initial SP
+;*                      - Set the initial PC == Reset_Handler
+;*                      - Set the vector table entries with the exceptions ISR address
+;*                      - Branches to __main in the C library (which eventually
+;*                        calls main()).
+;*                      After Reset the Cortex-M4 processor is in Thread mode,
+;*                      priority is Privileged, and the Stack is set to Main.
+;* <<< Use Configuration Wizard in Context Menu >>>
+;*******************************************************************************
+;*
+;* 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 STMicroelectronics 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
+;*
+;*******************************************************************************
+;
+; Amount of memory (in bytes) allocated for Stack
+; Tailor this value to your application needs
+; <h> Stack Configuration
+;   <o> Stack Size (in Bytes) <0x0-0xFFFFFFFF:8>
+; </h>
+
+Stack_Size		EQU     0x100
+
+                AREA    STACK, NOINIT, READWRITE, ALIGN=3
+Stack_Mem       SPACE   Stack_Size
+__initial_sp
+
+
+; <h> Heap Configuration
+;   <o>  Heap Size (in Bytes) <0x0-0xFFFFFFFF:8>
+; </h>
+
+Heap_Size      EQU     0x100
+
+                AREA    HEAP, NOINIT, READWRITE, ALIGN=3
+__heap_base
+Heap_Mem        SPACE   Heap_Size
+__heap_limit
+
+                PRESERVE8
+                THUMB
+
+
+; Vector Table Mapped to Address 0 at Reset
+                AREA    RESET, DATA, READONLY
+                EXPORT  __Vectors
+                EXPORT  __Vectors_End
+                EXPORT  __Vectors_Size
+
+__Vectors       DCD     __initial_sp               ; Top of Stack
+                DCD     Reset_Handler              ; Reset Handler
+                DCD     NMI_Handler                ; NMI Handler
+                DCD     HardFault_Handler          ; Hard Fault Handler
+                DCD     MemManage_Handler          ; MPU Fault Handler
+                DCD     BusFault_Handler           ; Bus Fault Handler
+                DCD     UsageFault_Handler         ; Usage Fault Handler
+                DCD     0                          ; Reserved
+                DCD     0                          ; Reserved
+                DCD     0                          ; Reserved
+                DCD     0                          ; Reserved
+                DCD     SVC_Handler                ; SVCall Handler
+                DCD     DebugMon_Handler           ; Debug Monitor Handler
+                DCD     0                          ; Reserved
+                DCD     PendSV_Handler             ; PendSV Handler
+                DCD     SysTick_Handler            ; SysTick Handler
+
+                ; External Interrupts
+                DCD     WWDG_IRQHandler                   ; Window WatchDog
+                DCD     PVD_PVM_IRQHandler                ; PVD/PVM1/PVM2/PVM3/PVM4 through EXTI Line detection
+                DCD     TAMP_STAMP_IRQHandler             ; Tamper and TimeStamps through the EXTI line
+                DCD     RTC_WKUP_IRQHandler               ; RTC Wakeup through the EXTI line
+                DCD     FLASH_IRQHandler                  ; FLASH
+                DCD     RCC_IRQHandler                    ; RCC
+                DCD     EXTI0_IRQHandler                  ; EXTI Line0
+                DCD     EXTI1_IRQHandler                  ; EXTI Line1
+                DCD     EXTI2_IRQHandler                  ; EXTI Line2
+                DCD     EXTI3_IRQHandler                  ; EXTI Line3
+                DCD     EXTI4_IRQHandler                  ; EXTI Line4
+                DCD     DMA1_Channel1_IRQHandler          ; DMA1 Channel 1
+                DCD     DMA1_Channel2_IRQHandler          ; DMA1 Channel 2
+                DCD     DMA1_Channel3_IRQHandler          ; DMA1 Channel 3
+                DCD     DMA1_Channel4_IRQHandler          ; DMA1 Channel 4
+                DCD     DMA1_Channel5_IRQHandler          ; DMA1 Channel 5
+                DCD     DMA1_Channel6_IRQHandler          ; DMA1 Channel 6
+                DCD     DMA1_Channel7_IRQHandler          ; DMA1 Channel 7
+                DCD     ADC1_IRQHandler                   ; ADC1
+                DCD     CAN1_TX_IRQHandler                ; CAN1 TX
+                DCD     CAN1_RX0_IRQHandler               ; CAN1 RX0
+                DCD     CAN1_RX1_IRQHandler               ; CAN1 RX1
+                DCD     CAN1_SCE_IRQHandler               ; CAN1 SCE
+                DCD     EXTI9_5_IRQHandler                ; External Line[9:5]s
+                DCD     TIM1_BRK_TIM15_IRQHandler         ; TIM1 Break and TIM15
+                DCD     TIM1_UP_TIM16_IRQHandler          ; TIM1 Update and TIM16
+                DCD     TIM1_TRG_COM_IRQHandler           ; TIM1 Trigger and Commutation
+                DCD     TIM1_CC_IRQHandler                ; TIM1 Capture Compare
+                DCD     TIM2_IRQHandler                   ; TIM2
+                DCD     0                                 ; Reserved
+                DCD     0                                 ; Reserved
+                DCD     I2C1_EV_IRQHandler                ; I2C1 Event
+                DCD     I2C1_ER_IRQHandler                ; I2C1 Error
+                DCD     I2C2_EV_IRQHandler                ; I2C2 Event
+                DCD     I2C2_ER_IRQHandler                ; I2C2 Error
+                DCD     SPI1_IRQHandler                   ; SPI1
+                DCD     SPI2_IRQHandler                   ; SPI2
+                DCD     USART1_IRQHandler                 ; USART1
+                DCD     USART2_IRQHandler                 ; USART2
+                DCD     USART3_IRQHandler                 ; USART3
+                DCD     EXTI15_10_IRQHandler              ; External Line[15:10]
+                DCD     RTC_Alarm_IRQHandler              ; RTC Alarm (A and B) through EXTI Line
+                DCD     0                                 ; Reserved
+                DCD     0                                 ; Reserved
+                DCD     0                                 ; Reserved
+                DCD     0                                 ; Reserved
+                DCD     0                                 ; Reserved
+                DCD     0                                 ; Reserved
+                DCD     0                                 ; Reserved
+                DCD     SDMMC1_IRQHandler                 ; SDMMC1
+                DCD     0                                 ; Reserved
+                DCD     SPI3_IRQHandler                   ; SPI3
+                DCD     0                                 ; Reserved
+                DCD     0                                 ; Reserved
+                DCD     TIM6_DAC_IRQHandler               ; TIM6 and DAC1&2 underrun errors
+                DCD     TIM7_IRQHandler                   ; TIM7
+                DCD     DMA2_Channel1_IRQHandler          ; DMA2 Channel 1
+                DCD     DMA2_Channel2_IRQHandler          ; DMA2 Channel 2
+                DCD     DMA2_Channel3_IRQHandler          ; DMA2 Channel 3
+                DCD     DMA2_Channel4_IRQHandler          ; DMA2 Channel 4
+                DCD     DMA2_Channel5_IRQHandler          ; DMA2 Channel 5
+                DCD     0                                 ; Reserved
+                DCD     0                                 ; Reserved
+                DCD     0                                 ; Reserved
+                DCD     COMP_IRQHandler                   ; COMP Interrupt
+                DCD     LPTIM1_IRQHandler                 ; LP TIM1 interrupt
+                DCD     LPTIM2_IRQHandler                 ; LP TIM2 interrupt
+                DCD     0                                 ; Reserved
+                DCD     DMA2_Channel6_IRQHandler          ; DMA2 Channel 6
+                DCD     DMA2_Channel7_IRQHandler          ; DMA2 Channel 7
+                DCD     LPUART1_IRQHandler                 ; LP UART1 interrupt
+                DCD     QUADSPI_IRQHandler                ; Quad SPI global interrupt
+                DCD     I2C3_EV_IRQHandler                ; I2C3 event
+                DCD     I2C3_ER_IRQHandler                ; I2C3 error
+                DCD     SAI1_IRQHandler                   ; Serial Audio Interface 1 global interrupt
+                DCD     0                                 ; Reserved
+                DCD     SWPMI1_IRQHandler                 ; Serial Wire Interface 1 global interrupt
+                DCD     TSC_IRQHandler                    ; Touch Sense Controller global interrupt
+                DCD     0                                 ; Reserved
+                DCD     0                                 ; Reserved
+                DCD     RNG_IRQHandler                    ; RNG global interrupt
+                DCD     FPU_IRQHandler                    ; FPU
+                DCD     CRS_IRQHandler                    ; CRS interrupt
+
+__Vectors_End
+
+__Vectors_Size  EQU  __Vectors_End - __Vectors
+
+                AREA    |.text|, CODE, READONLY
+
+; Reset handler
+Reset_Handler    PROC
+                 EXPORT  Reset_Handler             [WEAK]
+        IMPORT  SystemInit
+        IMPORT  __main
+
+                 LDR     R0, =SystemInit
+                 BLX     R0
+                 LDR     R0, =__main
+                 BX      R0
+                 ENDP
+
+; Dummy Exception Handlers (infinite loops which can be modified)
+
+NMI_Handler     PROC
+                EXPORT  NMI_Handler                [WEAK]
+                B       .
+                ENDP
+HardFault_Handler\
+                PROC
+                EXPORT  HardFault_Handler          [WEAK]
+                B       .
+                ENDP
+MemManage_Handler\
+                PROC
+                EXPORT  MemManage_Handler          [WEAK]
+                B       .
+                ENDP
+BusFault_Handler\
+                PROC
+                EXPORT  BusFault_Handler           [WEAK]
+                B       .
+                ENDP
+UsageFault_Handler\
+                PROC
+                EXPORT  UsageFault_Handler         [WEAK]
+                B       .
+                ENDP
+SVC_Handler     PROC
+                EXPORT  SVC_Handler                [WEAK]
+                B       .
+                ENDP
+DebugMon_Handler\
+                PROC
+                EXPORT  DebugMon_Handler           [WEAK]
+                B       .
+                ENDP
+PendSV_Handler  PROC
+                EXPORT  PendSV_Handler             [WEAK]
+                B       .
+                ENDP
+SysTick_Handler PROC
+                EXPORT  SysTick_Handler            [WEAK]
+                B       .
+                ENDP
+
+Default_Handler PROC
+
+        EXPORT     WWDG_IRQHandler                   [WEAK]
+        EXPORT     PVD_PVM_IRQHandler                [WEAK]
+        EXPORT     TAMP_STAMP_IRQHandler             [WEAK]
+        EXPORT     RTC_WKUP_IRQHandler               [WEAK]
+        EXPORT     FLASH_IRQHandler                  [WEAK]
+        EXPORT     RCC_IRQHandler                    [WEAK]
+        EXPORT     EXTI0_IRQHandler                  [WEAK]
+        EXPORT     EXTI1_IRQHandler                  [WEAK]
+        EXPORT     EXTI2_IRQHandler                  [WEAK]
+        EXPORT     EXTI3_IRQHandler                  [WEAK]
+        EXPORT     EXTI4_IRQHandler                  [WEAK]
+        EXPORT     DMA1_Channel1_IRQHandler          [WEAK]
+        EXPORT     DMA1_Channel2_IRQHandler          [WEAK]
+        EXPORT     DMA1_Channel3_IRQHandler          [WEAK]
+        EXPORT     DMA1_Channel4_IRQHandler          [WEAK]
+        EXPORT     DMA1_Channel5_IRQHandler          [WEAK]
+        EXPORT     DMA1_Channel6_IRQHandler          [WEAK]
+        EXPORT     DMA1_Channel7_IRQHandler          [WEAK]
+        EXPORT     ADC1_IRQHandler                   [WEAK]
+        EXPORT     CAN1_TX_IRQHandler                [WEAK]
+        EXPORT     CAN1_RX0_IRQHandler               [WEAK]
+        EXPORT     CAN1_RX1_IRQHandler               [WEAK]
+        EXPORT     CAN1_SCE_IRQHandler               [WEAK]
+        EXPORT     EXTI9_5_IRQHandler                [WEAK]
+        EXPORT     TIM1_BRK_TIM15_IRQHandler         [WEAK]
+        EXPORT     TIM1_UP_TIM16_IRQHandler          [WEAK]
+        EXPORT     TIM1_TRG_COM_IRQHandler           [WEAK]
+        EXPORT     TIM1_CC_IRQHandler                [WEAK]
+        EXPORT     TIM2_IRQHandler                   [WEAK]
+        EXPORT     I2C1_EV_IRQHandler                [WEAK]
+        EXPORT     I2C1_ER_IRQHandler                [WEAK]
+        EXPORT     I2C2_EV_IRQHandler                [WEAK]
+        EXPORT     I2C2_ER_IRQHandler                [WEAK]
+        EXPORT     SPI1_IRQHandler                   [WEAK]
+        EXPORT     SPI2_IRQHandler                   [WEAK]
+        EXPORT     USART1_IRQHandler                 [WEAK]
+        EXPORT     USART2_IRQHandler                 [WEAK]
+        EXPORT     USART3_IRQHandler                 [WEAK]
+        EXPORT     EXTI15_10_IRQHandler              [WEAK]
+        EXPORT     RTC_Alarm_IRQHandler              [WEAK]
+        EXPORT     SDMMC1_IRQHandler                 [WEAK]
+        EXPORT     SPI3_IRQHandler                   [WEAK]
+        EXPORT     TIM6_DAC_IRQHandler               [WEAK]
+        EXPORT     TIM7_IRQHandler                   [WEAK]
+        EXPORT     DMA2_Channel1_IRQHandler          [WEAK]
+        EXPORT     DMA2_Channel2_IRQHandler          [WEAK]
+        EXPORT     DMA2_Channel3_IRQHandler          [WEAK]
+        EXPORT     DMA2_Channel4_IRQHandler          [WEAK]
+        EXPORT     DMA2_Channel5_IRQHandler          [WEAK]
+        EXPORT     COMP_IRQHandler                   [WEAK]
+        EXPORT     LPTIM1_IRQHandler                 [WEAK]
+        EXPORT     LPTIM2_IRQHandler                 [WEAK]
+        EXPORT     DMA2_Channel6_IRQHandler          [WEAK]
+        EXPORT     DMA2_Channel7_IRQHandler          [WEAK]
+        EXPORT     LPUART1_IRQHandler                [WEAK]
+        EXPORT     QUADSPI_IRQHandler                [WEAK]
+        EXPORT     I2C3_EV_IRQHandler                [WEAK]
+        EXPORT     I2C3_ER_IRQHandler                [WEAK]
+        EXPORT     SAI1_IRQHandler                   [WEAK]
+        EXPORT     SWPMI1_IRQHandler                 [WEAK]
+        EXPORT     TSC_IRQHandler                    [WEAK]
+        EXPORT     RNG_IRQHandler                    [WEAK]
+        EXPORT     FPU_IRQHandler                    [WEAK]
+        EXPORT     CRS_IRQHandler                    [WEAK]
+
+WWDG_IRQHandler
+PVD_PVM_IRQHandler
+TAMP_STAMP_IRQHandler
+RTC_WKUP_IRQHandler
+FLASH_IRQHandler
+RCC_IRQHandler
+EXTI0_IRQHandler
+EXTI1_IRQHandler
+EXTI2_IRQHandler
+EXTI3_IRQHandler
+EXTI4_IRQHandler
+DMA1_Channel1_IRQHandler
+DMA1_Channel2_IRQHandler
+DMA1_Channel3_IRQHandler
+DMA1_Channel4_IRQHandler
+DMA1_Channel5_IRQHandler
+DMA1_Channel6_IRQHandler
+DMA1_Channel7_IRQHandler
+ADC1_IRQHandler
+CAN1_TX_IRQHandler
+CAN1_RX0_IRQHandler
+CAN1_RX1_IRQHandler
+CAN1_SCE_IRQHandler
+EXTI9_5_IRQHandler
+TIM1_BRK_TIM15_IRQHandler
+TIM1_UP_TIM16_IRQHandler
+TIM1_TRG_COM_IRQHandler
+TIM1_CC_IRQHandler
+TIM2_IRQHandler
+I2C1_EV_IRQHandler
+I2C1_ER_IRQHandler
+I2C2_EV_IRQHandler
+I2C2_ER_IRQHandler
+SPI1_IRQHandler
+SPI2_IRQHandler
+USART1_IRQHandler
+USART2_IRQHandler
+USART3_IRQHandler
+EXTI15_10_IRQHandler
+RTC_Alarm_IRQHandler
+SDMMC1_IRQHandler
+SPI3_IRQHandler
+TIM6_DAC_IRQHandler
+TIM7_IRQHandler
+DMA2_Channel1_IRQHandler
+DMA2_Channel2_IRQHandler
+DMA2_Channel3_IRQHandler
+DMA2_Channel4_IRQHandler
+DMA2_Channel5_IRQHandler
+COMP_IRQHandler
+LPTIM1_IRQHandler
+LPTIM2_IRQHandler
+DMA2_Channel6_IRQHandler
+DMA2_Channel7_IRQHandler
+LPUART1_IRQHandler
+QUADSPI_IRQHandler
+I2C3_EV_IRQHandler
+I2C3_ER_IRQHandler
+SAI1_IRQHandler
+SWPMI1_IRQHandler
+TSC_IRQHandler
+RNG_IRQHandler
+FPU_IRQHandler
+CRS_IRQHandler
+
+                B       .
+
+                ENDP
+
+                ALIGN
+
+;*******************************************************************************
+; User Stack and Heap initialization
+;*******************************************************************************
+                 IF      :DEF:__MICROLIB
+
+                 EXPORT  __initial_sp
+                 EXPORT  __heap_base
+                 EXPORT  __heap_limit
+
+                 ELSE
+
+                 IMPORT  __use_two_region_memory
+                 EXPORT  __user_initial_stackheap
+
+__user_initial_stackheap
+
+                 LDR     R0, =  Heap_Mem
+                 LDR     R1, =(Stack_Mem + Stack_Size)
+                 LDR     R2, = (Heap_Mem +  Heap_Size)
+                 LDR     R3, = Stack_Mem
+                 BX      LR
+
+                 ALIGN
+
+                 ENDIF
+
+                 END
+
+;************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE*****

board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/system_stm32l4xx.c

+/**
+  ******************************************************************************
+  * @file    system_stm32l4xx.c
+  * @author  MCD Application Team
+  * @brief   CMSIS Cortex-M4 Device Peripheral Access Layer System Source File
+  *
+  *   This file provides two functions and one global variable to be called from
+  *   user application:
+  *      - SystemInit(): This function is called at startup just after reset and
+  *                      before branch to main program. This call is made inside
+  *                      the "startup_stm32l4xx.s" file.
+  *
+  *      - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
+  *                                  by the user application to setup the SysTick
+  *                                  timer or configure other parameters.
+  *
+  *      - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
+  *                                 be called whenever the core clock is changed
+  *                                 during program execution.
+  *
+  *   After each device reset the MSI (4 MHz) is used as system clock source.
+  *   Then SystemInit() function is called, in "startup_stm32l4xx.s" file, to
+  *   configure the system clock before to branch to main program.
+  *
+  *   This file configures the system clock as follows:
+  *=============================================================================
+  *-----------------------------------------------------------------------------
+  *        System Clock source                    | MSI
+  *-----------------------------------------------------------------------------
+  *        SYSCLK(Hz)                             | 4000000
+  *-----------------------------------------------------------------------------
+  *        HCLK(Hz)                               | 4000000
+  *-----------------------------------------------------------------------------
+  *        AHB Prescaler                          | 1
+  *-----------------------------------------------------------------------------
+  *        APB1 Prescaler                         | 1
+  *-----------------------------------------------------------------------------
+  *        APB2 Prescaler                         | 1
+  *-----------------------------------------------------------------------------
+  *        PLL_M                                  | 1
+  *-----------------------------------------------------------------------------
+  *        PLL_N                                  | 8
+  *-----------------------------------------------------------------------------
+  *        PLL_P                                  | 7
+  *-----------------------------------------------------------------------------
+  *        PLL_Q                                  | 2
+  *-----------------------------------------------------------------------------
+  *        PLL_R                                  | 2
+  *-----------------------------------------------------------------------------
+  *        PLLSAI1_P                              | NA
+  *-----------------------------------------------------------------------------
+  *        PLLSAI1_Q                              | NA
+  *-----------------------------------------------------------------------------
+  *        PLLSAI1_R                              | NA
+  *-----------------------------------------------------------------------------
+  *        PLLSAI2_P                              | NA
+  *-----------------------------------------------------------------------------
+  *        PLLSAI2_Q                              | NA
+  *-----------------------------------------------------------------------------
+  *        PLLSAI2_R                              | NA
+  *-----------------------------------------------------------------------------
+  *        Require 48MHz for USB OTG FS,          | Disabled
+  *        SDIO and RNG clock                     |
+  *-----------------------------------------------------------------------------
+  *=============================================================================
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; Copyright (c) 2017 STMicroelectronics.
+  * All rights reserved.</center></h2>
+  *
+  * This software component is licensed by ST under BSD 3-Clause license,
+  * the "License"; You may not use this file except in compliance with the
+  * License. You may obtain a copy of the License at:
+  *                        opensource.org/licenses/BSD-3-Clause
+  *
+  ******************************************************************************
+  */
+
+/** @addtogroup CMSIS
+  * @{
+  */
+
+/** @addtogroup stm32l4xx_system
+  * @{
+  */
+
+/** @addtogroup STM32L4xx_System_Private_Includes
+  * @{
+  */
+
+#include "stm32l4xx.h"
+
+#if !defined  (HSE_VALUE)
+  #define HSE_VALUE    8000000U  /*!< Value of the External oscillator in Hz */
+#endif /* HSE_VALUE */
+
+#if !defined  (MSI_VALUE)
+  #define MSI_VALUE    4000000U  /*!< Value of the Internal oscillator in Hz*/
+#endif /* MSI_VALUE */
+
+#if !defined  (HSI_VALUE)
+  #define HSI_VALUE    16000000U /*!< Value of the Internal oscillator in Hz*/
+#endif /* HSI_VALUE */
+
+/**
+  * @}
+  */
+
+/** @addtogroup STM32L4xx_System_Private_TypesDefinitions
+  * @{
+  */
+
+/**
+  * @}
+  */
+
+/** @addtogroup STM32L4xx_System_Private_Defines
+  * @{
+  */
+
+/************************* Miscellaneous Configuration ************************/
+/*!< Uncomment the following line if you need to relocate your vector Table in
+     Internal SRAM. */
+/* #define VECT_TAB_SRAM */
+#define VECT_TAB_OFFSET  0x8000 /*!< Vector Table base offset field.
+                                   This value must be a multiple of 0x200. */
+/******************************************************************************/
+/**
+  * @}
+  */
+
+/** @addtogroup STM32L4xx_System_Private_Macros
+  * @{
+  */
+
+/**
+  * @}
+  */
+
+/** @addtogroup STM32L4xx_System_Private_Variables
+  * @{
+  */
+  /* The SystemCoreClock variable is updated in three ways:
+      1) by calling CMSIS function SystemCoreClockUpdate()
+      2) by calling HAL API function HAL_RCC_GetHCLKFreq()
+      3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
+         Note: If you use this function to configure the system clock; then there
+               is no need to call the 2 first functions listed above, since SystemCoreClock
+               variable is updated automatically.
+  */
+  uint32_t SystemCoreClock = 4000000U;
+
+  const uint8_t  AHBPrescTable[16] = {0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 1U, 2U, 3U, 4U, 6U, 7U, 8U, 9U};
+  const uint8_t  APBPrescTable[8] =  {0U, 0U, 0U, 0U, 1U, 2U, 3U, 4U};
+  const uint32_t MSIRangeTable[12] = {100000U,   200000U,   400000U,   800000U,  1000000U,  2000000U, \
+                                      4000000U, 8000000U, 16000000U, 24000000U, 32000000U, 48000000U};
+/**
+  * @}
+  */
+
+/** @addtogroup STM32L4xx_System_Private_FunctionPrototypes
+  * @{
+  */
+
+/**
+  * @}
+  */
+
+/** @addtogroup STM32L4xx_System_Private_Functions
+  * @{
+  */
+
+/**
+  * @brief  Setup the microcontroller system.
+  * @param  None
+  * @retval None
+  */
+
+void SystemInit(void)
+{
+  /* FPU settings ------------------------------------------------------------*/
+  #if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
+    SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2));  /* set CP10 and CP11 Full Access */
+  #endif
+
+  /* Reset the RCC clock configuration to the default reset state ------------*/
+  /* Set MSION bit */
+  RCC->CR |= RCC_CR_MSION;
+
+  /* Reset CFGR register */
+  RCC->CFGR = 0x00000000U;
+
+  /* Reset HSEON, CSSON , HSION, and PLLON bits */
+  RCC->CR &= 0xEAF6FFFFU;
+
+  /* Reset PLLCFGR register */
+  RCC->PLLCFGR = 0x00001000U;
+
+  /* Reset HSEBYP bit */
+  RCC->CR &= 0xFFFBFFFFU;
+
+  /* Disable all interrupts */
+  RCC->CIER = 0x00000000U;
+
+  /* Configure the Vector Table location add offset address ------------------*/
+#ifdef VECT_TAB_SRAM
+  SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
+#else
+  SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
+#endif
+}
+
+/**
+  * @brief  Update SystemCoreClock variable according to Clock Register Values.
+  *         The SystemCoreClock variable contains the core clock (HCLK), it can
+  *         be used by the user application to setup the SysTick timer or configure
+  *         other parameters.
+  *
+  * @note   Each time the core clock (HCLK) changes, this function must be called
+  *         to update SystemCoreClock variable value. Otherwise, any configuration
+  *         based on this variable will be incorrect.
+  *
+  * @note   - The system frequency computed by this function is not the real
+  *           frequency in the chip. It is calculated based on the predefined
+  *           constant and the selected clock source:
+  *
+  *           - If SYSCLK source is MSI, SystemCoreClock will contain the MSI_VALUE(*)
+  *
+  *           - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(**)
+  *
+  *           - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(***)
+  *
+  *           - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(***)
+  *             or HSI_VALUE(*) or MSI_VALUE(*) multiplied/divided by the PLL factors.
+  *
+  *         (*) MSI_VALUE is a constant defined in stm32l4xx_hal.h file (default value
+  *             4 MHz) but the real value may vary depending on the variations
+  *             in voltage and temperature.
+  *
+  *         (**) HSI_VALUE is a constant defined in stm32l4xx_hal.h file (default value
+  *              16 MHz) but the real value may vary depending on the variations
+  *              in voltage and temperature.
+  *
+  *         (***) HSE_VALUE is a constant defined in stm32l4xx_hal.h file (default value
+  *              8 MHz), user has to ensure that HSE_VALUE is same as the real
+  *              frequency of the crystal used. Otherwise, this function may
+  *              have wrong result.
+  *
+  *         - The result of this function could be not correct when using fractional
+  *           value for HSE crystal.
+  *
+  * @param  None
+  * @retval None
+  */
+void SystemCoreClockUpdate(void)
+{
+  uint32_t tmp = 0U, msirange = 0U, pllvco = 0U, pllr = 2U, pllsource = 0U, pllm = 2U;
+
+  /* Get MSI Range frequency--------------------------------------------------*/
+  if((RCC->CR & RCC_CR_MSIRGSEL) == RESET)
+  { /* MSISRANGE from RCC_CSR applies */
+    msirange = (RCC->CSR & RCC_CSR_MSISRANGE) >> 8U;
+  }
+  else
+  { /* MSIRANGE from RCC_CR applies */
+    msirange = (RCC->CR & RCC_CR_MSIRANGE) >> 4U;
+  }
+  /*MSI frequency range in HZ*/
+  msirange = MSIRangeTable[msirange];
+
+  /* Get SYSCLK source -------------------------------------------------------*/
+  switch (RCC->CFGR & RCC_CFGR_SWS)
+  {
+    case 0x00:  /* MSI used as system clock source */
+      SystemCoreClock = msirange;
+      break;
+
+    case 0x04:  /* HSI used as system clock source */
+      SystemCoreClock = HSI_VALUE;
+      break;
+
+    case 0x08:  /* HSE used as system clock source */
+      SystemCoreClock = HSE_VALUE;
+      break;
+
+    case 0x0C:  /* PLL used as system clock  source */
+      /* PLL_VCO = (HSE_VALUE or HSI_VALUE or MSI_VALUE/ PLLM) * PLLN
+         SYSCLK = PLL_VCO / PLLR
+         */
+      pllsource = (RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC);
+      pllm = ((RCC->PLLCFGR & RCC_PLLCFGR_PLLM) >> 4U) + 1U ;
+
+      switch (pllsource)
+      {
+        case 0x02:  /* HSI used as PLL clock source */
+          pllvco = (HSI_VALUE / pllm);
+          break;
+
+        case 0x03:  /* HSE used as PLL clock source */
+          pllvco = (HSE_VALUE / pllm);
+          break;
+
+        default:    /* MSI used as PLL clock source */
+          pllvco = (msirange / pllm);
+          break;
+      }
+      pllvco = pllvco * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 8U);
+      pllr = (((RCC->PLLCFGR & RCC_PLLCFGR_PLLR) >> 25U) + 1U) * 2U;
+      SystemCoreClock = pllvco/pllr;
+      break;
+
+    default:
+      SystemCoreClock = msirange;
+      break;
+  }
+  /* Compute HCLK clock frequency --------------------------------------------*/
+  /* Get HCLK prescaler */
+  tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4U)];
+  /* HCLK clock frequency */
+  SystemCoreClock >>= tmp;
+}
+
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_bootloader_recovery/Inc/stm32l4xx_it.h

+/* USER CODE BEGIN Header */
+/**
+  ******************************************************************************
+  * @file    stm32l4xx_it.h
+  * @brief   This file contains the headers of the interrupt handlers.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
+  * All rights reserved.</center></h2>
+  *
+  * This software component is licensed by ST under BSD 3-Clause license,
+  * the "License"; You may not use this file except in compliance with the
+  * License. You may obtain a copy of the License at:
+  *                        opensource.org/licenses/BSD-3-Clause
+  *
+ ******************************************************************************
+  */
+/* USER CODE END Header */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __STM32L4xx_IT_H
+#define __STM32L4xx_IT_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif 
+
+/* Private includes ----------------------------------------------------------*/
+/* USER CODE BEGIN Includes */
+
+/* USER CODE END Includes */
+
+/* Exported types ------------------------------------------------------------*/
+/* USER CODE BEGIN ET */
+
+/* USER CODE END ET */
+
+/* Exported constants --------------------------------------------------------*/
+/* USER CODE BEGIN EC */
+
+/* USER CODE END EC */
+
+/* Exported macro ------------------------------------------------------------*/
+/* USER CODE BEGIN EM */
+
+/* USER CODE END EM */
+
+/* Exported functions prototypes ---------------------------------------------*/
+void NMI_Handler(void);
+void HardFault_Handler(void);
+void MemManage_Handler(void);
+void BusFault_Handler(void);
+void UsageFault_Handler(void);
+void SVC_Handler(void);
+void DebugMon_Handler(void);
+void PendSV_Handler(void);
+void SysTick_Handler(void);
+/* USER CODE BEGIN EFP */
+
+/* USER CODE END EFP */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STM32L4xx_IT_H */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_bootloader_recovery/Src/main.c

+/**
+ ******************************************************************************
+ * @file           : main.c
+ * @brief          : Main program body
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
+ * All rights reserved.</center></h2>
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ *                        opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+#include "stdio.h"
+#include "stm32l4xx_hal.h"
+
+#include "ota_recovery.h"
+
+/* Private function prototypes -----------------------------------------------*/
+void SystemClock_Config(void);
+static void MX_USART2_UART_Init(void);
+
+UART_HandleTypeDef huart2;
+
+int fputc(int ch, FILE *f)
+{
+    while ((USART2->ISR & 0X40) == 0);
+    USART2->TDR = (uint8_t)ch;
+    return ch;
+}
+
+extern ota_flash_drv_t stm32l4_norflash_onchip_drv_ota;
+extern ota_flash_prop_t stm32l4_norflash_onchip_prop_ota;
+
+int main(void)
+{
+    /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
+    HAL_Init();
+
+    /* Configure the system clock */
+    SystemClock_Config();
+
+    MX_USART2_UART_Init();
+
+    uint32_t partition_addr = 0x08024800;
+
+    if (ota_env_init(OTA_UPDATE_IN_POSITION, partition_addr, &stm32l4_norflash_onchip_drv_ota, &stm32l4_norflash_onchip_prop_ota) < 0) {
+        printf("env init failed!\n");
+        return -1;
+    }
+
+#if 1
+    if (ota_recovery_xip() != 0) {
+        printf("recovery failed!\n");
+    } else {
+        printf("recovery successfully!\n");
+    }
+#else
+    if (ota_recovery() != 0) {
+        printf("recovery failed!\n");
+    } else {
+        printf("recovery successfully!\n");
+    }
+#endif
+
+    uint32_t jmp_addr, app_addr = ota_partition_start(OTA_PARTITION_ACTIVE_APP);
+
+    /* test if user code is programmed starting from address app_addr */
+    if (((*(uint32_t *)app_addr) & 0x2FFE0000) == 0x20000000) {
+        /* Jump to user application */
+        jmp_addr = *(uint32_t *)(app_addr + 4);
+
+        /* Initialize user application's Stack Pointer */
+        __set_MSP(*(uint32_t *)app_addr);
+        ((void (*)(void))jmp_addr)();
+    }
+}
+
+void Error_Handler(void)
+{
+}
+
+/**
+ * @brief System Clock Configuration
+ * @retval None
+ */
+void SystemClock_Config(void)
+{
+    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
+    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
+    RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
+
+    /** Initializes the CPU, AHB and APB busses clocks
+    */
+    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
+    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
+    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
+    RCC_OscInitStruct.PLL.PLLM = 1;
+    RCC_OscInitStruct.PLL.PLLN = 20;
+    RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV7;
+    RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
+    RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
+    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
+    {
+        Error_Handler();
+    }
+    /** Initializes the CPU, AHB and APB busses clocks
+    */
+    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
+        |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
+    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
+    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
+    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
+    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
+
+    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)
+    {
+        Error_Handler();
+    }
+    PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;
+    PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
+    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
+    {
+        Error_Handler();
+    }
+    /** Configure the main internal regulator output voltage
+    */
+    if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)
+    {
+        Error_Handler();
+    }
+}
+
+/**
+ * @brief USART2 Initialization Function
+ * @param None
+ * @retval None
+ */
+static void MX_USART2_UART_Init(void)
+{
+    huart2.Instance = USART2;
+    huart2.Init.BaudRate = 115200;
+    huart2.Init.WordLength = UART_WORDLENGTH_8B;
+    huart2.Init.StopBits = UART_STOPBITS_1;
+    huart2.Init.Parity = UART_PARITY_NONE;
+    huart2.Init.Mode = UART_MODE_TX_RX;
+    huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
+#if 0
+    huart2.Init.OverSampling = UART_OVERSAMPLING_16;
+    huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
+    huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
+#else
+    huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_RXOVERRUNDISABLE_INIT;
+    huart2.AdvancedInit.OverrunDisable = UART_ADVFEATURE_OVERRUN_DISABLE;
+#endif
+    if (HAL_UART_Init(&huart2) != HAL_OK)
+    {
+        Error_Handler();
+    }
+}
+
+
+#ifdef  USE_FULL_ASSERT
+/**
+ * @brief  Reports the name of the source file and the source line number
+ *         where the assert_param error has occurred.
+ * @param  file: pointer to the source file name
+ * @param  line: assert_param error line source number
+ * @retval None
+ */
+void assert_failed(char *file, uint32_t line)
+{
+}
+
+#endif /* USE_FULL_ASSERT */
+

board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_bootloader_recovery/TOS-CONFIG/event_driven/tos_config.h

+#ifndef _TOS_CONFIG_H_
+#define  _TOS_CONFIG_H_
+
+#include "stm32l4xx.h"
+
+#define TOS_CFG_EVENT_DRIVEN_EN         1u
+
+#define TOS_CFG_MMHEAP_EN               1u
+
+#define TOS_CFG_MMHEAP_DEFAULT_POOL_SIZE        0x8000
+
+#define TOS_CFG_PWR_MGR_EN              0u
+
+#define TOS_CFG_CPU_TICK_PER_SECOND     1000u
+
+#define TOS_CFG_CPU_CLOCK               (SystemCoreClock)
+
+#endif
+

board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_bootloader_recovery/TOS-CONFIG/tickless/tos_config.h

+#ifndef _TOS_CONFIG_H_
+#define  _TOS_CONFIG_H_
+
+#include "stm32l4xx.h"
+
+#define TOS_CFG_TASK_PRIO_MAX           10u
+
+#define TOS_CFG_ROUND_ROBIN_EN          1u
+
+#define TOS_CFG_OBJECT_VERIFY_EN           1u
+
+#define TOS_CFG_TASK_DYNAMIC_CREATE_EN  0u
+
+#define TOS_CFG_EVENT_EN                1u
+
+#define TOS_CFG_MMBLK_EN                1u
+
+#define TOS_CFG_MMHEAP_EN               1u
+
+#define TOS_CFG_MMHEAP_DEFAULT_POOL_SIZE        0x6000
+
+#define TOS_CFG_MUTEX_EN                1u
+
+#define TOS_CFG_TIMER_EN                1u
+
+#define TOS_CFG_PWR_MGR_EN              1u
+
+#define TOS_CFG_TICKLESS_EN             1u
+
+#define TOS_CFG_SEM_EN                  1u
+
+#define TOS_CFG_IDLE_TASK_STK_SIZE      512u
+
+#define TOS_CFG_CPU_TICK_PER_SECOND     1000u
+
+#define TOS_CFG_CPU_CLOCK               (SystemCoreClock)
+
+#define TOS_CFG_TIMER_AS_PROC           1u
+
+#endif
+

components/ota/common/diff/version

+4.3