Photon running out of RAM?

Firmware
1

Hi all

I’ve just finished up working on a display driver for the Newhaven SSD1325 display.
It works great with the Adafruit GFX library however, due to the size of the memory buffer I think I may be running out of RAM now that I’ve added additional functions.
This problem has likely come about because the display requires a 4096 byte buffer. (Each byte addresses 2 pixels, 16 levels of brightness each.) Unlike the SSD1306 which I believe stores 8 pixels per byte.
Now I’m not exactly sure that I have run out of RAM, but at times, the Photon flashes red straight after programming and then resets itself (this happens in a loop until I restart in safe mode). Does this sound like a RAM issue?
So I suppose I’ve got two questions, is there a way that I can tell how much RAM I’m using, and is the next firmware build likely to free up any more RAM?

Cheers

2

The firmware starts with around 70K of free RAM. In 0.4.4, there is a new firmware API

uint32_t freemem = System.freeMemory();

that you can use to determine if the system is running out of memory.

3 Likes
3

Thanks @mdma, really appreciate you going through all these old questions! Hope you had a good vacation!