ChibiOS Free Embedded RTOS

It looks like you are overeflowing the region by 6408 bytes.

RAM is 112K
CCM is 64K

How big is OUTPUT_BUFFER?
What other large memory allocations are you doing?

Can you provide a copy of the .map file?
That will tell just what is going where and how big it is.

-John Scott

Is this the STM32F4-discovery board?

Which demo program are you trying to use?

What tool chain are you using?

Anything else you can tell us about your setup?

Thanks
-John Scott

Are you using a debugger?

Do you have all the debugging options turned on in the config files?

What are you seeing? Inquiring minds want to know!

http://chibios.org/dokuwiki/doku.php?id=chibios:guides:debug_guide In case you have not seen it.

-John Scott

It looks like you are using this function in your main() function.... If that is the case, then you need to use chVTSet() not chVTSetI()... The "I" on the end indicates that it is to be called in one of the system lock states... Do a search for "i" class functions for more inform...

You can use halGetCounterValue()

You can find more information at:

http://chibios.sourceforge.net/html/gro ... a55b7fd74c

-John Scott

I found this information of what the "nobits" and "progbits" do. It may not be complete, but it tells us we don't need to worry about that warning. From: http://psomas.wordpress.com/2011/02/25/inline-assembly-gcc-attributes-linker-scripts-and-a-kernel-macro/ 3) When using the sec...

I am working on dumping everything out of the DMA accessible memory that I can to maximize DMA speed. In my makefile I have switched the section that was: # Define linker script file here LDSCRIPT= $(PORTLD)/STM32F407xG.ld #LDSCRIPT= $(PORTLD)/STM32F407xG_CCM.ld to read # Define linker script file h...

Hi Giovanni, DMA is FUN!!! :D :D I have been using DMA for stuff since the Z80 days in the 80's. It takes a while to wrap your mind around the concepts, but it is not too hard from there... I have been working through the STM32 docs for the last week and a half. I think I have figured out the STM32 ...

I am getting ready to set up DMA access to the 16-bit I/O port GPIOE. I am going to set the i/o port as output using the config file, but I am not sure how to specify the data register to the DMA function. It looks like this may work, but I am not sure.... // Set the destination address dmaStreamSet...

OK, I think I am getting a handle on how to set the dma transactions up, here is my code for setting up one of the DMA streams... This stream should move data from a 14K output buffer to PORTE one HWORD per trigger. Will this work correctly, or am I missing something.... Also, how do I set up a call...