MicroPython Forum (Archive)

Thanks Chuckbook, OutoftheBOTS, and Jimmo my logical analyzer doesn't have enough bandwidth I presume...So objdump will do :) gcc is smater than me: 00000000 <perf_count>: 0: b510 push {r4, lr} 2: f7ff fffe bl 0 <HAL_GetTick> 6: 4b06 ldr r3, [pc, #24] ; (20 <perf_count+0x20>) 8: 4604 mov r4, r0 ----...

Hi, I' m debugging weird clock settings on my board and I was running some performance tests. I added a C module doing : #define NOP asm volatile(" nop \n\t") STATIC mp_obj_t perf_count(size_t n_args, const mp_obj_t *args) { (void)n_args; uint32_t start = HAL_GetTick(); uint32_t count = 0; uint32_t ...

Thanks,
Yes, exactly. I meant
- core: py/*.c
- modules: extmod/*.c => so that in the board definition I can select/remove modules based on my RAM needs

I will play with nm and add a little script to generate those stats on demand, at least to keep track of the memory (flash and RAM) usage.

Hi, Sorry if this topic was already discussed... did not find it while searching the forums. Before I start coding some useless tools, is there a way to: - at compile time to show the RAM and Flash that will be allocated by the core and each module (kind of size mod....o ?) - at runtime to monitor d...

Yes! Could we upgrade ? I like to use it to test things when I don't have my env.
Thanks !

Hi mattyt, It already works, at least on my Meowbit (STM32F4 + flash or sd + TFT7735), was not complicated: https://github.com/shazz/micropython/blob/master/extmod/modimage.c this module relies on the Framebuf module somewhat modified to handle more modes (16 colors, 256 colors, rgr565...) If any qu...

Ah, I found picojpeg, another JPEG decoder but optimized for MCU, only 2K of RAM used!

Hi, I was watching the video from Damien: MicroPython Melbourne Meetup: Wrap C In MicroPython. And I thought it would be cool to add the JPEG decoder to the Meowbit. As Damien in the video, same issue, the programs allocates too much memory to fit in the STM32F4 I was wondering if somebody tried to ...

Ok I found out I need to retrieve the mount point first using: // retrieve VFS FAT mount mp_vfs_mount_t *vfs = mp_vfs_lookup_path(filename, &p_out); if (vfs != MP_VFS_NONE && vfs != MP_VFS_ROOT) { vfs_fat = MP_OBJ_TO_PTR(vfs->obj); } else { printf("Cannot find user mount for %s\n", filename); return...

Ok. I did not expect to code a module in CPP but the module would use the CPP library probably wrapped with a C interface. So I guess in this case, I would be outside the MicroPython headers but the memory management needs to be overloaded as you suggested. I'll try that... or use a C library :) Tha...