/**
@page IAP AN3965 STM32F4xx In-Application Programming using the USART Readme file
******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
* @file IAP/IAP_Main/readme.txt
* @author MCD Application Team
* @brief Description of implementation of the AN3965 (in-application programming
* using the USART (IAP)) on STM32F4xx devices.
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
@par Application Description
This directory contains a set of sources files and pre-configured projects that
describes how to build an application to be loaded into Flash memory using
In-Application Programming (IAP, through USART).
@par Keywords
In-Application Programming, IAP, USART, Binary, flash
@par Directory contents
- "IAP/IAP_Main/inc": contains the IAP firmware header files
- IAP/IAP_Main/inc/main.h The main include file of the project.
- IAP/IAP_Main/inc/common.h This file provides all the headers of the common functions.
- IAP/IAP_Main/inc/flash_if.h This file provides all the firmware
function headers of the flash_if.c file.
- IAP/IAP_Main/inc/menu.h This file provides all the firmware
function headers of the menu.c file.
- IAP/IAP_Main/inc/ymodem.h This file provides all the firmware
function headers of the ymodem.c file.
- IAP/IAP_Main/inc/stm32f4xx_hal_conf.h Library Configuration file
- IAP/IAP_Main/inc/stm32f4xx_it.h Header for stm32f4xx_it.c
- "IAP/IAP_Main/MDK-ARM": contains pre-configured project for MDK-ARM toolchain
- "IAP/IAP_Main/EWARM": contains pre-configured project for EWARM toolchain
- "IAP/IAP_Main/STM32CubeIDE": contains preconfigured project for STM32CubeIDE toolchain (main program)
- "IAP/IAP_Main/src": contains the IAP firmware source files
- IAP/IAP_Main/src/main.c Main program
- IAP/IAP_Main/src/stm32f4xx_it.c Interrupt handlers
- IAP/IAP_Main/src/stm32f4xx_hal_msp.c Microcontroller specific packages
initialization file.
- IAP/IAP_Main/src/flash_if.c The file contains write, erase and disable
write protection of the internal Flash
memory.
- IAP/IAP_Main/src/menu.c This file contains the menu to select
downloading a new binary file, uploading
internal Flash memory, executing the binary
and disabling the write protection of
write-protected pages
- IAP/IAP_Main/src/common.c This file provides functions related to
read/write from/to USART peripheral
- IAP/IAP_Main/src/ymodem.c This file provides all the firmware functions
related to the ymodem protocol.
- IAP/IAP_Main/src/system_stm32f4xx.c STM32F4xx system source file
@par Hardware and Software environment
- This application runs on STM32F429xx/STM32F439xx devices.
- This application has been tested with STMicroelectronics STM324x9I-EVAL RevB
evaluation boards and can be easily tailored to any other supported device
and development board.
Table 1. IAP implementation on STM324x9I-EVAL RevB
/*** Platform ***|************* Implementation **************************|***** Configuration *****\
****************************************************************************************************
| Firmware | The IAP program is located at 0x08000000. The Flash | |
| | routines (program/erase) are executed from the Flash | |
| | memory. | |
| | The size of this program is about 16 Kbytes and | |
| | programmed on: | Sector 0 |
| | ------------------------------------------------------|-------------------------|
| | The user application (image to be downloaded with the | |
| | IAP) will be programmed starting from address | |
| | (uint32_t)0x08004000(1). | (Sector 1 - Sector 23) |
| | The maximum size of the image to be loaded is: | 3698 bytes |
| | ------------------------------------------------------|-------------------------|
| | The image is uploaded with the IAP from the STM32F4xx | 11 Kbytes |
| | internal Flash. | (Sector 1) |
| | The size of the image to be uploaded is: | |
|----------------|-------------------------------------------------------|-------------------------|
| Hardware | Push-button (active level: high) | Key push-button |
| | | connected to pin PC13 |
| | ------------------------------------------------------|-------------------------|
| | USART used | USART (CN8) |
\**************************************************************************************************/
(1) User application location address is defined in the flash_if.h file as:
#define APPLICATION_ADDRESS ((uint32_t)0x08004000)
To modify it, change the default value to the desired one. Note that the application must be linked
relatively to the new address too.
Following picture illustrates the situation in program memory:
Figure 2. Flash memory usage
Top Flash Memory address /-------------------------------------------\ 0x081FFFFF
| |
| |
| |
| |
| |
| Sector 1 - Sector 23 |
| |
| |
| |
| |
| |
| |
| |
| User code |
| |
|- - - - - - - - - - - - - - - - - - - - - -|
| Vector table |
|-------------------------------------------| 0x08004000
| IAP code |
|- - - - - - - - - - - - - - - - - - - - - -|
| Vector table |
\-------------------------------------------/ 0x08000000
- STM324x9I-EVAL RevB Set-up
- Connect a null-modem female/female RS232 cable between the boards DB9 connector
CN8 (USART) and PC serial port.
(make sure that jumper JP7 is RS232_RX position pos 1-2).
- Hold the Key push-button during reset to enter the IAP.
- Terminal configuration:
- Word Length = 8 Bits
- One Stop Bit
- No parity
- BaudRate = 115200 baud
- flow control: None
- Ymodem protocol is using CRC16 by default. To switch to checksum, comment #define CRC16_F
in ymodem.c
@par How to use it?
In order to make the program work, you must do the following:
1. Generate a binary image for the program provided in the
"IAP/IAP_Binary_Template" project directory.
2. Program the internal Flash with the IAP (see below)
3. Open HyperTerminal window using the settings already defined in section
"Hardware and Software environment"
4. To run the IAP driver, keep the Key push-button pressed at Reset.
The IAP main menu is then displayed on the HyperTerminal window.
5. To download an application, press 1 and use the Ymodem protocol
In order to load the IAP code, you have do the following:
- EWARM:
- Open the Project.eww workspace
- Rebuild all files: Project->Rebuild all
- Load project image: Project->Debug
- Run program: Debug->Go(F5)
- MDK-ARM:
- Open the Project.uvproj project
- Rebuild all files: Project->Rebuild all target files
- Load project image: Debug->Start/Stop Debug Session
- Run program: Debug->Run (F5)
- STM32CubeIDE:
- Open STM32CubeIDE toolchain
- Browse to the STM32CubeIDE workspace directory, select the project (.project file in \IAP_Main\STM32CubeIDE \STM324x9I-EVAL directory).
- Rebuild all project files: Select the project in the "Project explorer" window then click on Project->build project menu.
- Run program: Run->Debug
*/
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