STMicroelectronics AN4065 STM32F0xx In-Application Programming Application Note

This document introduces the in-application programming (IAP) technology of the STM32F0xx microcontroller, and provides an example of reprogramming using the USART communication protocol. This technology allows firmware updates in the end product.

Brand: STMicroelectronics
Document type: Application Note
Language: English
Pages: 13
File format: PDF
File size: 184 KB
Published: 07 August, 2012
Updated: 28 September, 2023
Model: STM32F0xx
MD5 checksum: 3D547768342A1D9B4199760AB2C2C4DE
PDF: STMicroelectronics AN4065 STM32F0xx In-Application Programming Application Note PDF

About this manual

The document describes how to implement firmware updates for STM32F0xx devices by programming an IAP driver into Flash memory via the Serial Wire Debug (SWD) interface. The IAP driver utilizes the Universal Synchronous Asynchronous Receiver Transmitter (USART) peripheral to communicate with a host PC running HyperTerminal or a compatible terminal program.

What's inside

IAP Overview
Principle
IAP Driver Description
Running the IAP Driver
HyperTerminal Configuration
Executing the IAP Driver
IAP Driver Menu
Download Image to Internal Flash
Upload Image from Internal Flash
Disable Write Protection

Specifications

Baud Rate Example	115200 bps
Data Bits	8
Parity	None
Stop Bits	1
Flow Control	None

Frequently asked questions

What protocol is used for data transfer in the IAP driver?

The YMODEM protocol is used to receive/send data from/to the HyperTerminal application.

How does the user switch between the user application and IAP mode?

The user can press a push-button connected to a specific pin at reset; not pressing it switches to the user application.

What happens if data received during programming fails verification?

The system displays a 'Verification failed' error message if there is any discrepancy between RAM and Flash contents.

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