Posted by cipriansalageanu on 2015-09-12 13:59

Hi,

This is a link time error.

“Reset_Handler” symbol should be defined in MCU startup file (written in assembler). Check if you have one file named “startup_stm32f030xx.s” (I think this should be the name in you case).
The place where to look for this file is “/startup” directory from where the “.project” is located (this is the project directory) - so go to project directory and then try to locate this file in startup dir.
In the project explorer check if you have a directory named startup.

In startup file you should have a section like this:

.section .text.Reset_Handler
.weak Reset_Handler
.type Reset_Handler, %function
Reset_Handler:
ldr r0, =_estack
mov sp, r0 /* set stack pointer */

and later in the same file
g_pfnVectors:
.word _estack
.word Reset_Handler

Regarding the address 08000000 - this is the start address for Flash memory, at this address after a Reset, microcontroller start to execute code instructions.
The GNU linker (ld.exe) informs you that will put the code starting with this address.

Posted by smith2e6 on 2017-12-19 14:21

Dec 19, 2017
I had a System Workbench project with the warning about cannot find symbol Reset_Handler.
I have another similar project which compiles without the warning.
Both projects are for use with the Nucleo-64 board with STM32F446RE.
I am not an expert or even “good” fellow with System Workbench, however...
In looking at the differences between the two projects, I noticed that the project without the warning has a folder name ‘startup” and in that folder is a file startup_stm32f4xx.s and in that file is code related to Reset_Handler.
My project with the warning does not have such a folder.
I copied the startup folder from the good project into the bad project.
The project still compiled with the warning.
I used the following to add a path to the startup folder.
Project tab at top of screen -> Properties ->C/C++ General -> Paths and Symbols -> tab:Source Locations.
See a list of paths to various folders within the project.
See a button for Add Folder, click on that.
Get a new small popup window that shows several items.
One of the items is my new startup folder: click on that line to highlight it.
In the window that shows list of paths, see new line for path to startup folder.
Click on the Apply button in the lower right corner of the Properties window; that window closes.
Now the project compiles without the warning.
And the program runs on my Nucleo board.
Ah, the happiness when finally the LD2 on the board begins to blink.