ChibiOS Free Embedded RTOS

so the panic msg is saying stack overflow, but is i said earlier if i increase the the thread static WORKING_AREA(waThread1, 128); from 128 (default value) upto 512, it then hits the _unhandled_exception

the unhandled_exception is hit when chThdSleepMilliseconds(1000); is called in the blinker thread

By examining the stack areas you can understand which stack is overflowing, if you use ChibiStudio then the ChibiOS debug view does that for you.

Giovanni

do i need to enable this as by default the ChibiOS/RT view as nothing in it all fields and tabs are empty

right declaring the varibles the are used by the f_open locally caused the _unhandled_exception

FIL file;
UINT wbytes;
FRESULT result;
char msgstr[40];

if i then increased WORKING area to 512 all is working.

The RT view is working now, that must have been down to the stack issues.

Now have a working USB-CDC and SD-Card Demo for STM3241G-EVAL board.

Giovanni - if you would like this demo for your repository let me know and i'll send it to you

Thanks for teh help

Hi,

If you could post a ready-to-go zip file in the contributions forum it would be great.

About the ChibiOS view, you need to hit the refresh button in the toolbar.

Giovanni

Returning from

At the B instruction, seem to throw an hardfault in ff.c from fatfs R0.10b.

This gets called from f_stat, all other fatfs functionality seems ok.

This is because a FILINFO structure is assumed to be "empty" when filled with 0. When filled with standard stackfill of 0x55 it will crash.
It was in reaction to mukululul a few pages back, not very on topic anymore.

Good to know anyway

Giovanni