Hello,

I am evaluating STM8 with STM8 discovery board (STM8S105C6).

I am using the user bootloader provided with AN2659. It is located at the starting of flash memory (memory address range from 0x8000 to 0x8FFF). For this, I use the linker options CODESTART(0x8000) and CODESIZE(0x1000). The interrupt vector table is redirected to 0x9000 memory address thanks to the file I found on this forum: redirect_irq_table.c. At the end of execution, the bootloader is jumping at the absolute address 0x9080.

I also have an demonstration application. It is managed in a separate project. There, the linker options are INTVECTOR(0x9000), to create the shifted interrupt vector table, and CODESTART(0x9000).
My entry function is declared as:

at 0x9080 void main_application(void)
{
 ...
}

Interrupt vector are declared the usual way:

void TRAP_IRQHandler(void) trap
{}

void TLI_IRQHandler(void) interrupt 0
{}

...

Here is my problem: when I compile the application, I got the error ***WARNING 4 : CODE SPACE MEMORY OVERLAP ADDRESS: 8FFC.

What am I doing wrong? Why is the 8FFC address used in application project while it is not supposed to use any address before 0x9000?

For information : I upload the bootloader in the uC with STVP, then I am using Flash Loader Demonstrator to program the application software through IAP. Flash Loader can interract with the bootloader, then I choose the map file STM8_32K(user-bootloader) (provided in AN2659), and finaly choose the .hex file.
If I choose the option Erase necessary pages, then the download immediately fails with message FAIL: Unable to erase flash. If I choose not to erase anything, the download is successful, application is running fine, and it seems I can re-download application again. However, I am concerned by the warning about 8FFC, and not being able to erase application flash sectors.

Thank you in advance for your help,

Piet

Extra : test if the forum bug linker to the " character?

Hi Piet,

we are facing exactly the same problem. Download of application works but erase doesn't. The same linker warning ***WARNING 4 : CODE SPACE MEMORY OVERLAP ADDRESS: 8FFC.

Did you manage to solve this issue?

Regards, Paul