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SDK v3

Posted: Fri Sep 07, 2018 3:56 pm
by eriksl
I noted when switching to the current v3 SDK:

- user_rf_pre_init is NO LONGER called (contrary what is said above). You can set a variable in your function and check it later to see.
- user_rf_cal_sector_set is NO LONGER called (contrary what is said above). You can set a variable in your function and check it later to see.
IRAM space has shrinked considerately, I lost about 450 bytes.
- "heap free" has increased by 16k. I suspect the "use IRAM for DRAM" function is enabled by default (contrary to the documentation), let's see how we switch that off, it would be nice to have a function to check IRAM usage

Instead of using IRAM for DRAM, I'd rather use IRAM flash cache for IRAM flash code (i.e. the 32 k part that is always almost full because SDK code uses most of it).

Which half of the IRAM cache space is being used for DRAM if enabled? Upper or lower?

Re: SDK v3

Posted: Fri Oct 12, 2018 8:58 pm
by Her Mary
Ask on GitHub may be a better choice, engineers are more active there. https://github.com/espressif/ESP8266_RTOS_SDK