RP2040 ram and rom usage?

[chipfryer27]

Thanks Leigh

I'll go searching. I'd read about ESP32 2nd core but don't recall offhand the Pico.

Regards

[Chadb]

Hey, I have searched high and low and can't find any reference to this.

Thanks,

Chad

[LeighM]

No, neither can I
I did a demo (2 years ago, as Google Photos reminded me yesterday!) that I thought had gone onto either a forum or the WiKi.
A simple program that flashes an LED from each core.
I'm hoping I still have it on my PC, I'm not in a position to check for a few days.
But if not, it shouldn't be too difficult for me to re-create it, but it's likely next week before I get chance.

[LeighM]

I think I might have found something (cloud backup proved worthwhile)
I haven't access to Flowcode at the moment to check this, but please try attached.
Things to note are the supplementary header code and some C code in Main.
Hope it loads

[chipfryer27]

Hi Leigh

Thanks for this. I won't be able to try until later in the week and I assume I'll need to grab multicore.h from GIT or such like?

Regards

[Chadb]

Yeah the build failed. It looks like it choked on multicore.h. I am going to try to find it.

[Chadb]

it's in C:\pico-sdk\src\rp2_common\pico_multicore\include\pico\multicore.h

and

C:\pico-sdk\src\host\pico_multicore\include\pico\multicore.h

[Chadb]

So I pasted the location into the include and that got around the not found file.

Code: Select all

dir/C_/pico-sdk/src/rp2_common/hardware_i2c/i2c.c.obj
[ 88%] Linking CXX executable flowcode.elf
c:/progra~2/gnuarm~1/102020~1/bin/../lib/gcc/arm-none-eabi/10.2.1/../../../../arm-none-eabi/bin/ld.exe: CMakeFiles\flowcode.dir\flowcode.c.obj: in function `main':
flowcode.c:(.text.startup.main+0xa): undefined reference to `multicore_launch_core1'
collect2.exe: error: ld returned 1 exit status

It doesn't like the launch core 1

[LeighM]

Ok. Thanks for trying. Looks like it might need to wait until I can test it. I can't recall if there's any config changes required.

[Chadb]

Ok no problem. FYI this is what the .h has.

Code: Select all

void multicore_reset_core1(void);
void multicore_launch_core1(void (*entry)(void));