Documentation of functions implemented in ROM would be also nice. Technical reference manual also does not correspond with ESP-IDF (many registers / register bits are missing). E. g.: DPORT_APP_CACHE_CTRL1_REG is missing (it is according to ESP-IDF very important to work around a hardware bug how to...

Hi, I have read that GPIO_34 - GPIO_39 have no pullup / pulldown resistors no matter if they are connected to RTC_MUX or IO_MUX. Is this true? Are pins RTC_6 - RTC_9 affected by 3.6 bug too? And if so, which register (XTAL_32 / TOUCH) should I use for RTC pins 8 (XTAL_32_K_N / TOUCH8) and 9 (XTAL_32...

Is there any option for dual-core mutex? E. g. what happens when both cores access the same peripheral register / memory segment?

Hello,
what is the correct way to implement simple mutex to share date between Core 0 (FreeRTOS) and Core 1 (without FreeRTOS)? There is a simple example for ARM: http://infocenter.arm.com/help/index.js ... 03s02.html.

It is clearer to me now. Thank you!

Hi, in ESP32 technical docs is this memory area marked as reserved but ESP IDF flashes binary image into this area and then copies it in 2nd stage bootloader to other memory ranges. Are there any docs about how 0x0000_0000 - 0x3F3F_FFFF memory works so that I could leave data / instructions code her...

Working directly with Xtensa is probably out of my scope. The main problem of ESP32 is that WiFi drivers are closed source and they are using FreeRTOS. I will post another topic here if we can do anything about that. From my point of view ESP-IDF should be written more in HAL or StdPerip style. Free...

I am running CPU at 240 MHz. With this frequency I could achieve 8 kHz gyro update rate (I don't think that 32 kHz is possible as FPU is not the fastest https://www.esp32.com/viewtopic.php?t=800 and it is not even probably worth it - I always had to run low pass filter on gyro to get good results). ...

Sure, I know betaflight very well. I would like to make my flight controller compatible with betaflight ones as much as possible. Currently I am using ESP32 this way: Core 0 (PRO CPU) takes care of WiFi related stuff. It reads TCP commands (calibrate accelerometr, download flight log fil) and UDP da...

This is maybe a question that is very wide but I see that many drones have STM32 (F3-F4 ARM) MCUs but they are not so great comparing to ESP32. So I am just curious if there is any drone that has ESP32 flight controller or any project/kikstart to do that... It would be nice to see how esp performs ...