B4R Question ESP32 storing image in RAM

[RJB]

Hi,
I'm trying to store an image in the ESP32 RAM in 565 RGB format.
Using:

Dim ImageStore(32400) As Int

for a 240 x 135 pixel image works fine but if I increase the the size I get to a point where I get an error like:

.........\B4RALA~4\Objects\bin/src.ino.elf section `.dram0.bss' will not fit in region `dram0_0_seg'
........./xtensa-esp32-elf-gcc/1.22.0-80-g6c4433a-5.2.0/bin/../lib/gcc/xtensa-esp32-elf/5.2.0/../../../../xtensa-esp32-elf/bin/ld.exe: DRAM segment data does not fit.
........./xtensa-esp32-elf-gcc/1.22.0-80-g6c4433a-5.2.0/bin/../lib/gcc/xtensa-esp32-elf/5.2.0/../../../../xtensa-esp32-elf/bin/ld.exe: region `dram0_0_seg' overflowed by 5704 bytes

does anyone know if there is a way around this or possibly a better way to store the image?
Thanks

 

[Erel]

You can use rESP8266FileSystem library to read and write to the flash. The flash size is configurable in the board selector.

 

[RJB]

Thanks, I'll try that. Presumably there's a limit to the number of times you can do it? I seem to remember 100k times so probably not a problem.
Is there any way to use the full RAM? Multiple large arrays seem to bust it the same as one very large one. There's still around 200K of 'dynamic memory' available when you hit the problem.
From the error message it looks like the memory is segmented, Is it possible to use different segments?
Thanks.

 

[RJB]

I just checked TFT_eSPI.h
I'm using pushImage from RAM and PROGMEM but I don't know how that would work from the filesystem. Would I be able to 'push' the image straight from the filesystem or will I have to copy it to RAM a block at a time then push the blocks to adjacent blocks on screen?
Thanks