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by papaluna
Wed Nov 06, 2019 4:18 pm
Forum: ESP32 IDF
Topic: What is the lowest supported I2C clock speed?
Replies: 4
Views: 213

Re: What is the lowest supported I2C clock speed?

Thanks.

Should I create a github issue for the driver and how it calculates the clk_speed?
by papaluna
Tue Nov 05, 2019 10:36 pm
Forum: ESP32 IDF
Topic: What is the lowest supported I2C clock speed?
Replies: 4
Views: 213

What is the lowest supported I2C clock speed?

Hi, For: ESP-IDF v3.3 I want to configure a low I2C clock speed of 1K because I want to use the ESP32 in combination with a few slave devices using a relatively long cable of 1 meter. I cannot use another data protocol in this project. The ESP-IDF docs do not specify a lowest I2C clock speed so I as...
by papaluna
Wed Aug 28, 2019 3:31 pm
Forum: Hardware
Topic: ADC VRef calibration eFuse
Replies: 3
Views: 522

Re: ADC VRef calibration eFuse

No matter what I supply for the VREF param it always gets set to 1100 because the fuse takes priority.
FYI I'm also using the Lolin D32 board intensively. I have always assumed that the fuse takes priority and there is no way around that. But I hope I am wrong.
by papaluna
Sun Jul 28, 2019 2:33 pm
Forum: General Discussion
Topic: Uptime in millis
Replies: 3
Views: 417

Re: Uptime in millis

I see 2 possibilities: 1. esp_log_timestamp() https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/system/log.html?highlight=esp_log_timestamp#_CPPv417esp_log_timestampv This also includes the time in the bootloader. 2. xTaskGetTickCount() * portTICK_PERIOD_MS https://docs.espressif.c...
by papaluna
Sun Jun 09, 2019 2:32 pm
Forum: ESP32 IDF
Topic: eclipse setup
Replies: 2
Views: 436

Re: eclipse setup

by papaluna
Tue May 21, 2019 8:00 am
Forum: ESP32 IDF
Topic: Internal RTC Drifting -8 Minutes in 15 Hours.
Replies: 5
Views: 624

Re: Internal RTC Drifting -8 Minutes in 15 Hours.

Hi, You can try to change in menuconfig the "RTC clock source" to from "Internal 150kHz oscillator" to "Internal 8.5MHz oscillator divided by 256". The accuracy should improve. The online help in menuconfig provides more information: - "Internal 8.5MHz oscillator divided by 256" option results in hi...
by papaluna
Mon May 20, 2019 6:56 pm
Forum: Hardware
Topic: Need guidelines: wiring and configuring an external 32Khz oscillator input in EDP-IDF
Replies: 4
Views: 674

Re: Need guidelines: wiring and configuring an external 32Khz oscillator input in EDP-IDF

Hi WIfive, Thanks for the review! I have created a 0.8V power rail and used that for the pullups in this test. Test#1 (my production setup): - Menuconfig: "(*) External 32kHz oscillator at 32K_XP pin" - RTC board pin "32K" => 10K pullup resistor => Power rail 0.8V (this pullup is specific for the DS...
by papaluna
Mon May 20, 2019 8:30 am
Forum: Hardware
Topic: Need guidelines: wiring and configuring an external 32Khz oscillator input in EDP-IDF
Replies: 4
Views: 674

Need guidelines: wiring and configuring an external 32Khz oscillator input in EDP-IDF

Hi, For ESP-IDF v3.2 in combination with Adafruit HUZZAH32 (ESP32-WROOM-32 module). This question is about the technical documentation and configuring an external 32Khz oscillator in EDP-IDF. I'm searching for instructions on how to use an external 32Khz oscillator output signal as input for the ESP...
by papaluna
Thu May 16, 2019 6:09 pm
Forum: General Discussion
Topic: Eclipse still showing "unresolved inclusion" and "Symbol couldn't be resolved"
Replies: 18
Views: 3075

Re: Eclipse still showing "unresolved inclusion" and "Symbol couldn't be resolved"

Hi Gunar, Thanks for trying. To be complete, I also import the attached XML file as follows: Project -> Properties: C/C++ General -> "Path & Symbols" property page -> tabIncludes: For Language="GNU C" Do: => Import "esp32-eclipse-includes.xml" # Do the following every time you copied files into the ...

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