FWIW, I get 'boot mode 11' here when I go into flash mode... (which works). I will take a look at my bootstrap pin setup when I have time.

ICACHE and DCACHE are instruction and data 'windows' into the cached SPI flash. The ICACHE is indeed 3.5M, the DCACHE 512K. The ICACHE can execute code, but can only be accessed in 32-bit increments, the DCACHE is byte-accessible and cannot execute code.

does it mean that there is 48K before that that can be used? I am not entirely sure. Could be that the 48K is used by the ROM. for our app, i'd like to trade some of that IRAM for DRAM as we are heap-intensive but do not care about execution speed as much (cached flash execution is fine). There's n...

is esp31 go production? or it's just a beta version before esp32. The ESP31 is a sort of engineering sample; we use it to figure out bugs and test most of the hardware. 99% of the things inthere will also be the same in the ESP32; there will be some small tweaks like the aforementioned memory map w...

Sure. I have no docs I can release of that, but very quickly: The ESP31 has three regions of RAM: an IRAM for the first cpu at 0x40040000 (which is 128K), an IRAM for the second CPU at 0x3ffa8000 (64K) and a shared RAM at 0x3FFD8000 (192K). The IRAMs actually are 32K bigger than that, but if SPI cac...

To my knowledge, apart from the bug I mentioned, it should work just fine. I use it in my daily work, fwiw.

Here you go. Please be aware that this is not an official Espressif tool and while this may change in the future, at the moment Espressif nor the original author support this version of esptool.py. Ah, it also seems to have a small bug: on some configurations it won't succeed in putting the ESP31 in...

Fyi, do not take this as an indication on the amount of memory that will be available in the final SDK and on the final ESP32 chip. Because of the memory map of the ESP31, we only use a specific bit of memory (the shared RAM) as heap. Don't quote me on this, but I estimate the free heap in the ESP32...

At the moment, the SDK only supports the first processor of the ESP31. As soon as the ESP32 is out, the plan is to move to a SMP system, meaning that it basically will act the same as a dual-core PC, that is, you just start up a bunch of threads which will be pinned to one of the cores or allowed to...

Nice to see they are shipping out. Wonder if they are shipping all at once or in smaller batches. They are going out in smaller batches, so unfortunately, if you have bad luck, it can take a while (as in: few weeks, maybe more) for the modules to get to you. We're trying to ship them as fast as we ...