Search found 12 matches

by brown_x
Tue Jan 23, 2024 2:15 pm
Forum: General Discussion
Topic: TWAI (CAN bus) driver CPU usage?
Replies: 0
Views: 747

TWAI (CAN bus) driver CPU usage?

Hi Anyone using TWAI/CAN bus drivers can tell me how much CPU it uses on ESP32 C6? For me it is not 100% clear how much of the driver functionality is implemented in SW and how much in the TWAI controllers. On older versions of CAN stack and older versions of ESP32 (the ones with two cores) the CAN ...
by brown_x
Wed Oct 23, 2019 7:20 am
Forum: ESP-IDF
Topic: Building and running a module beyond the original image file
Replies: 13
Views: 26439

Re: Building and running a module beyond the original image file

Any news on this?
It was more than a year ago, wondering if that opensource code is available now or not :)
by brown_x
Fri Oct 11, 2019 11:15 am
Forum: Report Bugs
Topic: new operator kills logging
Replies: 0
Views: 4248

new operator kills logging

Noticed the issue with the esp-iot-solution/lvgl_example but might be overall issue - anyone knows a fix would be nice. I am afraid of a stack corruption or something since the log stops working in a new operator calling parent constructor and than child one. Parent is working ok, child constructor ...
by brown_x
Thu Jan 04, 2018 12:33 pm
Forum: Hardware
Topic: ESP32 ADC Calibration curves?
Replies: 18
Views: 39494

Re: ESP32 ADC Calibration curves?

As far as I understand: 1. we have to route the vref to a gpio internally 2. measure it manually 3. save that value somewhere and replace the #define V_REF 1100 with the saved value This is kinda produces unexpected steps in factory process and it is bad too since we already used all the GPIO's, con...
by brown_x
Wed Dec 06, 2017 10:49 am
Forum: Hardware
Topic: ESP32 ADC Calibration curves?
Replies: 18
Views: 39494

Re: ESP32 ADC Calibration curves?

Any update on this?
by brown_x
Wed Jul 12, 2017 10:17 am
Forum: Hardware
Topic: ESP32 ADC Calibration curves?
Replies: 18
Views: 39494

Re: ESP32 ADC Calibration curves?

The method seems to be fine.

The handlig of new chip/old chip is something we will need to take care - either ask for new batch, either do the calibration during our factory process I guess.

Ty for the feedback and we are waiting the new version.
by brown_x
Wed Jul 12, 2017 7:42 am
Forum: Hardware
Topic: ESP32 ADC Calibration curves?
Replies: 18
Views: 39494

Re: ESP32 ADC Calibration curves?

I really hope I'll get a feedback soon from Espressif since I need to know if I can use it for analog sensors (I can't use i2c sensors unless I use external AD but that will rise the price of the product which might push me towards another controller). It's not a problem if it is not linear, even if...
by brown_x
Thu Jul 06, 2017 10:31 am
Forum: Hardware
Topic: ESP32 ADC Calibration curves?
Replies: 18
Views: 39494

Re: ESP32 ADC Calibration curves?

Tested the formula for ADC digital value 1476, the voltage applied is 1.23V (measured with a multimeter). If I use the formula from Your screenshot y=1.0052x+169.41 the resulting value will be 1653.09 mV. Which is way off from 1.23V ... Did I identified wrong y being the voltage, x the digital read ...
by brown_x
Mon Jul 03, 2017 12:59 pm
Forum: Hardware
Topic: ESP32 ADC Calibration curves?
Replies: 18
Views: 39494

Re: ESP32 ADC Calibration curves?

Any ~date for the 3.0 release? Or is not known yet?
by brown_x
Mon Jul 03, 2017 8:22 am
Forum: Hardware
Topic: ESP32 ADC Calibration curves?
Replies: 18
Views: 39494

ESP32 ADC Calibration curves?

Is there anything new about ADC calibration curves? I need an ADC what works - the current raw value is dangling around but much worst is that I don't really know the maximum Voltage to which the ADC gives back 4095 on -11Db attenuation and neither how I can match the inner values to real voltages. ...