STMicroelectronics AN2557 STM32F10x In-Application Programming Using USART

About this manual

This document describes the In-Application Programming (IAP) feature for STM32F10x microcontrollers, allowing firmware updates via communication protocols like USART. It details the IAP driver components, including source files for downloading, uploading, and executing programs, as well as the YMODEM protocol used for data transfer.

The guide explains how to configure the HyperTerminal for communication, run the IAP driver, and navigate the driver menu to download images, upload memory contents, execute new programs, or disable write protection. It also covers specific implementation details for various STM32F10x device densities and evaluation boards.

What's inside

• IAP Overview
• IAP Driver Description
• Running the IAP Driver
• HyperTerminal Configuration
• Downloading Image to Flash
• Uploading Image from Flash
• Executing New Program
• Disabling Write Protection
• IAP Implementation Summary
• User Program Conditions

Frequently asked questions

What baud rate must be configured in HyperTerminal for the IAP driver?

The system clock frequency must allow a generated baud rate of 115200 bps.

How large are the data blocks sent via the YMODEM protocol?

The YMODEM protocol sends data in 1024-byte blocks.

What happens if the received image file is larger than available memory?

An error message stating 'Other error messages are also displayed when the image file size is greater than the allowed memory space' appears.