Quite some time ago, I published some blogs about the ESP32 PSRAM. I think it is about time to dig a litte deeper into the topic and look at how we can use the unadressable 4 MBytes. PSRAM and C++ STL One thing that took me by surprise when I Read more…
Arrays The best way to allocate an Array of data in the AudioTools is by using a Vector. E.g. Vector<int16_t> vector{100000}; is allocating a vector of 100’000 2 byte signed integers. RAM and PSRAM The ESP32 has a few hundred kilobytes of internal RAM, residing on the same die as Read more…
The ESP32 microcontroller has only a few hundred kilobytes of internal RAM. Fortunately the ESP32 AudioKit or ESP32 Wrover provide 8MB PSRAM where 4MB can be directly addressed. More information how to use PSRAM in Arduino can be found here. The only thing to highlight is that PSRAM can not Read more…