Search found 62 matches

by Hans Dorn
Mon Apr 03, 2017 7:37 pm
Forum: General Discussion
Topic: [Video] ESP32 - The ESP32 IRC channel
Replies: 12
Views: 17560

Re: [Video] ESP32 - The ESP32 IRC channel

Nice.

Is there a way for me to access this through my gopher client?

:mrgreen:
by Hans Dorn
Mon Apr 03, 2017 5:40 pm
Forum: Report Bugs
Topic: I2C SCL frequency 10% less than it should be at 400kHz
Replies: 55
Views: 92218

Re: I2C SCL frequency 10% less than it should be at 400kHz

A little update from my side: I added an oled display and an arduino to my I2C setup to generate some traffic. While testing some changes to make things faster I ran into issues with unreliable communication. Errors will pop up several times a day, causing my reboot logic to trigger. I just undid th...
by Hans Dorn
Thu Mar 30, 2017 9:00 pm
Forum: Hardware
Topic: ESP32 Pin Layout (for QFN 5*5), Pin25, Pin26
Replies: 32
Views: 54915

Re: ESP32 Pin Layout (for QFN 5*5), Pin25, Pin26

The pin 1 dot wouldn't line up with pin 1 if it was on the 14 pin side...

Cheers
by Hans Dorn
Mon Mar 27, 2017 11:51 pm
Forum: Report Bugs
Topic: I2C SCL frequency 10% less than it should be at 400kHz
Replies: 55
Views: 92218

Re: I2C SCL frequency 10% less than it should be at 400kHz

Hi Angus, thx.


It might be a while until I get up to speed with the IDF. I'm working on a little arduino project right now, and rather would finish this first.

Cheers
by Hans Dorn
Mon Mar 27, 2017 10:20 pm
Forum: Report Bugs
Topic: I2C SCL frequency 10% less than it should be at 400kHz
Replies: 55
Views: 92218

Re: I2C SCL frequency 10% less than it should be at 400kHz

Hi Angus, thanks for the feedback! I had a look at the performance penalty of using the slower address. I counted the cycles used for a call to "i2cSetCmd" for both variants. Using the 3xxx address, I get at 0.733µs,while the 6xxx address makes i2cSetCmd take 1.046µs or 142.7% of the original versio...
by Hans Dorn
Sun Mar 26, 2017 7:59 pm
Forum: ESP-IDF
Topic: [Solved] Eclipse, C++ and the Standard Template Library
Replies: 11
Views: 19504

Re: [Solved] Eclipse, C++ and the Standard Template Library

FWIW, you can't have lambdas inherit any context if you want to use function pointers.

I looked them up a while ago because I wanted to add some context to an ISR, but no dice...
by Hans Dorn
Sun Mar 26, 2017 1:13 am
Forum: Report Bugs
Topic: I2C SCL frequency 10% less than it should be at 400kHz
Replies: 55
Views: 92218

Re: I2C SCL frequency 10% less than it should be at 400kHz

Hans, Others have been having this problem as well and I shared your post with them. Thanks to your discovery, the problem may be resolved. An issue has been raised on Github regarding this: https://github.com/espressif/arduino-esp32/issues/286 . You might want to subscribe to that issue on there t...
by Hans Dorn
Sun Mar 26, 2017 1:08 am
Forum: Report Bugs
Topic: I2C SCL frequency 10% less than it should be at 400kHz
Replies: 55
Views: 92218

Re: I2C SCL frequency 10% less than it should be at 400kHz

I'll give that a look - define "much better" though... are you seeing errors still, but fewer, or no problems at all (so far)? Well, since I just made the change, I didn't want to jinx it :) It's now been running for 63000 seconds at a cycle time of 14ms = 4,500,000 updates so far, and I haven't sp...
by Hans Dorn
Sat Mar 25, 2017 6:14 pm
Forum: Hardware
Topic: About the CAN controller.
Replies: 175
Views: 309521

Re: About the CAN controller.

Heh, I read that one a while ago.

Problem is, some hardware vendors require RTR's if you want to communicate with their equipment.

Guess they failed to read the linked post :)

RTR's are a nuisance.


Cheers
by Hans Dorn
Sat Mar 25, 2017 5:33 pm
Forum: Hardware
Topic: About the CAN controller.
Replies: 175
Views: 309521

Re: About the CAN controller.

Nice.

Dont't forget about those pesky RTR frames :P

Cheers