Hi,

I'd like to know how much memory the FX3 hardware-driver uses from the 512KB SRAM-size (besides the 12KB initial stack and DMA-descriptors)? So how large is the code- and data-size and how much heap and stack is roughly used by the driver?

I want to roughly calculate the remaining memory size which can be used by user-specific firmware.

Regards,

Robert

There is just a firmware framework running on FX3 so your usage of the word hardware driver is little confusing. Are you talking about the threadX running on it?
 

No, I mean the FX3-firmware framework including the API's provided by Cypress!

The firmware framework IS the TheadX real time operating system running on the ARM core extended by the Cypress USB API functions.

However it is called, but does anybody know how much memory the framework occupies roughly?

Thanks!

No one any idea?

The size of .txt + .data - sections of the FX3-framwwork I assume to be ~130KB by compiling the simple bulk loop auto - example.

But what about the size of the dynamic memory (stack, heap etc.) the FX3-framework uses?

I am also interested to know the maximum buffer size for the DMA channels. As long as I use equal or less than 128 kB for my DMA buffers it is working fine. However, as soon as I try to use more, the FX3 won't enumerate anymore.

On the other hand there are 512 kB RAM, where the application code uses roughly 130 kB, So there should be 254 kB still available, and the question is how much the RTOS is using.

Anybody some more information on this? Thanks.

-Silvio

It's all ok: I found a nice figure in the FX3 programmers manual (p. 54) that explains everything.