Hi,

I noticed that ADC1 sometimes erroneously returns 0xFFF during wake up from deep sleep, when the cause is a timeout.
To demonstrate the problem, I downloaded the latest esp-idf, and slightly modified example ulp_adc.
See diff to main .c and to .S files below.

Basically, the mods consist in ...

Hi,

@ ESP_igrr : have you had a chance to sort this out and remove the glitch ?

I'm running into a similar issue I think, where ADC1 returns 0xFFF on a pin that"s kept at constant level approximately 30ms before esp_wake_deep_sleep() is run.
(I'm spotting it by having ulp toggling a few pins to ...