I would be eager to see some pre-release if you don't mind...it doesn't need to be in pretty format...my project was stuck due to current ULP are not able to read GPIO input through RTC_GPIO_IN_REG. I'm trying to find out if using ADC can be a viable work-around. deep sleep / ULP example is finished...

Thanks WiFive!

Feel it's really tough to work on ULP in such a time frame, seems to me ULP is really not a priority on ESP side currently...

WiFive wrote:ULP is able to perform an ADC read. Not supported by existing macro instructions. Is supported by binutils, but no docs.

Any progress on supporting CPU frequency change recently? Hi roctwo, In the current version (and in 1.0) we don't support run-time changes to the CPU frequency. Switching CPU frequency is not difficult, but some changes need to be done to FreeRTOS tick routine, and also to the timekeeping routines. ...

@uhrheber, how is your progress of using ULP for your project? Is is smooth? I'm trying to use esp32 on batter powered device too, but run into many different problems. I do have a way to generate ULP instructions using C macros. This may be used to write programs for the ULP with an assembly-like s...

WiFive wrote:Yes with ULP. Not supported yet.

@WiFive, I'm not quite following your words...are you saying ADC is able to work in deep sleep mode but not with ULP?

I'm trying to understand if ADC can work in deep-sleep mode or not? Is there any example available if this is a supported use case?

Any good new on this example? @ESP_igrr

@igrr, are you back from vocation now? would you please help here?

oh...I realized that it might because I'm using a mongoose-os api to setup the interrupt handler...and there is a queue used by mongoose-os might causing problem like this.

Hi, I'm using a GPIO pin as a external interrupt, responding to negedge events. A event handler is registered and can be called correctly, but the interrupt latency seems pretty unpridictable. I'm setting another GPIO pin to high when entering the event handler, and clears it before leaving the hand...