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SW4STM32 and SW4Linux fully supports the STM32MP1 asymmetric multicore Cortex/A7+M4 MPUs

   With System Workbench for Linux, Embedded Linux on the STM32MP1 family of MPUs from ST was never as simple to build and maintain, even for newcomers in the Linux world. And, if you install System Workbench for Linux in System Workbench for STM32 you can seamlessly develop and debug asymmetric applications running partly on Linux, partly on the Cortex-M4.
You can get more information from the ac6-tools website and download (registration required) various documents highlighting:

System Workbench for STM32

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Error after converting cube project to C++

Posted by modtronix on 2015-07-18 04:58

== UPDATE ==
BUG REPORT, see “Answer to Question2” in reply below. There is a bug when converting C to C++ project. The linker script is removed
== END ==

Hi, I have to add some c++ code to my project. The project was created by latest STM32CubeMX for STM32L1. Works and runs on MCU. I followed steps in previous post how to convert project to C++. This works. But, get following linker errors:

undefined reference to `_exit’
undefined reference to `_close’
.....

I am using printf and other functions. I fixed problem by adding syscalls.c file with these functions.

Question 1

Is there a reference “syscalls.c” file to use with cube projects? I got one from the net, and don’t trust it at all!

Question 2

After adding the syscalls.c file mentioned above, project builds. But, now when I try to program the STM32L151RC I get following errors. Can anyone help?

‘’Programming Finished
Perify Started
target state: halted
target halted due to breakpoint, current mode: Thread
xPSR: 0x61000000 pc: 0x2000002e msp: 0x20008000
Error: checksum mismatch - attempting binary compare
diff 0 address 0x00008000. Was 0x82 instead of 0xf8
diff 1 address 0x00008001. Was 0x62 instead of 0xb5
diff 2 address 0x00008002. Was 0x98 instead of 0x00
..... Many more diff x lines .....’’

Reads: 9390
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Posted by modtronix on 2015-07-20 03:13

To anser my own questions:

Answer to Question 1

I got a syscalls.c from SW4STM by creating a new project, and using the generated “syscalls.c” file.

Answer to Question 2:

The problem was that after converting to C++ file, the linker file is removed from project properties. Have to go to section and give in the linker file again.

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