proxmark3/armlib/AT32_Firmware_Library_Change.md

Introduction

In order to simplify development, some peripheral devices are operated using the firmware library provided by AT32 official.

The directory where the basic firmware library for AT32 is stored is at32_sys.

There are some additional USB (middleware) implementations stored in the at32_usb directory.

The source is opensource on GitHub, AT32F435_437_Firmware_Library

• AT32F435_437_Firmware_Library/libraries/cmsis > armlib/at32_sys/cmsis
• AT32F435_437_Firmware_Library/libraries/drivers > armlib/at32_sys/drivers

core dir is from gpio example, it is related by project, in general, it is not necessary to modify it.

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What's change

Change of at32f435_437_conf.h

We would like to use the official library directly for the current ARM project without modifying it. However, in reality, some of the official libraries are not well-designed and have a serious impact on the buildingof the project. Such as, the UART related libraries may conflict with some function/variable names in the current PM3.

• Annotate all module definitions and includes definitions.
• including at32f435_437.h does not include all definitions of drivers/base libraries. include your drivers/base libraries if needed.
• If the driver library reports an error, it may be because the driver library does not include the required header file (which was originally included by the at32f435_437_comf.h header file).

Change of files

• Some datasheet pdf deleted
• startup_at32f435_437.s
  • delete .bss clear
  • delete .data copy
  • delete call __libc_init_array() function
  • stack top change to symbol _stack_end

  This startup file is specifically designed for the osimage of PM3 and is no longer compatible with the official example of AT32.

• delete dir: startup/gcc/linker
• delete dir: startup/iar
• delete dir: startup/mdk