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Firmware migration using the library

AN4228

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DocID024110 Rev 5

Firmware migration using the library

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

Peripherals Library to the STM32F3xx Standard Peripherals Library.

The STM32F1xx and STM32F3xx 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 STM32F3 series product.

Note:

In the rest of this section (unless otherwise specified), the term “STM32F3xx library” is used

to refer to the STM32F3xx Standard Peripherals Library, and the term “STM32F10x library”

is used to refer to the STM32F10x Standard Peripherals Library.

STM32F3xx devices refers to STM32F30/31xxx devices and STM32F37/38xxx devices.

4.1

Migration steps

To update your application code to run on STM32F3xx library, 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 STM32F3xx

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 STM32F3xx library install

package under the following directory: Libraries\CMSIS\Device\ST\STM32F3xx.

Add STM32F3xx library source files to the application sources:

Replace the stm32f10x_conf.h file of your application by stm32f3xx_conf.h

provided in STM32F3xx library.

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

stm32f3xx_it.c/Stm32f3xx_it.h provided in STM32F3xx library.

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

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

Note:

The STM32F3xx library comes with a rich set of examples (around 76 in total)

demonstrating how to use the different peripherals. They are located under

Project\STM32F3xx_StdPeriph_Examples\.

4.2

RCC driver

4.2.1

System clock configuration

As presented in Section 3.4: Reset and clock controller (RCC) interface, the STM32F3 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: only replace the system_stm32f10x.c file

by system_stm32f3xx.c file. This file provides an implementation of SystemInit() function

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