load asset from fram

[rayman]

i would like to load asset from an 32kbyte external fram (i2c interface) 

someone's done this before and would share his code ?

you couldn't put this directly into gd-lib ?
that would be perfect for small bitmaps which are used e. g. for buttons


bool readBitmapFromSd2Fram(file, toAdr) { ... }

bool loadAssetFromFram(fromAdr) { ... }

[jamesbowman]

Asset loading is really just sending the GD2 file into the EVE command stream. In other words .gd2 asset files are just raw EVE commands.

So if you put the N-byte .gd2 file in the FRAM then the code to copy it from FRAM to the EVE can be:


for (int i = 0; i < N; i += 4) {
 uint32_t w = read_32_bits_from_fram();
 GD.cmd32(w);
}

[rayman]

that unfortunately overtaxes my abilities ;(

i have 3 assets in my assets.h and i can load and handle this without problems

1. include in my main.cpp
2. call LOAD_ASSETS() ... LOAD_ASSETS_1() ...
3. works fine

i don't have a plan for how i'm supposed to go about it
1. write a simple loader sketch for load assets-files from sd-card to fram/eeprom
2. write functions
LOAD_ASSETS_FRAM(i2c_id, ..., ...);

advantages:
* sd-card free for other things (~GD_STORAGE)
* the surface on the display works even if the sd-card is defective
* speed ?

disadvantages;
* must first be loaded in fram/eeprom
* need fram/eeprom with adequate size
* ...

ft81x (gd3) have 1mb for assets and images