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Firmware migration using the library

AN4088

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Firmware migration using the library

This section describes how to migrate an application based on STM32F1xx Standard

Peripherals Library in order to use the STM32F0xx Standard Peripherals Library.

The STM32F1xx and STM32F0xx libraries have the same architecture and are CMSIS

compliant; they use the same driver naming and the same APIs for all compatible

peripherals.

Only a few peripheral drivers need to be updated to migrate the application from an

STM32F1 series to an STM32F0 series product.

Note:

In the rest of this chapter (unless otherwise specified), the term “STM32F0xx Library” is

used to refer to the STM32F0xx Standard Peripherals Library, and the term “STM32F10x

Library” is used to refer to the STM32F10x Standard Peripherals Library.

4.1

Migration steps

To update your application code to run on STM32F0xx Library, you have to follow the steps

listed below:

Update the toolchain startup files

Project files: device connections and Flash memory loader. These files are

provided with the latest version of your toolchain that supports STM32F0xxx

devices. For more information, please refer to your toolchain documentation.

Linker configuration and vector table location files: these files are developed

following the CMSIS standard and are included in the STM32F0xx Library install

package under the following directory: Libraries\CMSIS\Device\ST\STM32F0xx.

Add STM32F0xx Library source files to the application sources

Replace the stm32f10x_conf.h file of your application with stm32f0xx_conf.h

provided in STM32F0xx Library.

Replace the existing stm32f10x_it.c/stm32f10x_it.h files in your application with

stm32f0xx_it.c/Stm32f0xx_it.h provided in STM32F0xx Library.

Update the part of your application code that uses the RCC, PWR, GPIO, FLASH, ADC

and RTC drivers. Further details are provided in the next section.

Note:

The STM32F0xx Library comes with a rich set of examples (67 in total) demonstrating how

to use the different peripherals (under Project\STM32F0xx_StdPeriph_Examples\).

4.2

RCC driver

System clock configuration: as presented in section 3.4: Reset and clock controller

(RCC) interface, the STM32F0 and STM32F1 series have the same clock sources and

configuration procedures. However, there are some differences related to the product

voltage range, PLL configuration, maximum frequency and Flash wait state

configuration. Thanks to the CMSIS layer, these differences are hidden from the

application code; you only have to replace the system_stm32f10x.c file by

system_stm32f0xx.c file. This file provides an implementation of SystemInit() function

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