Search found 95 matches

by roctwo
Thu Mar 30, 2017 9:23 am
Forum: General Discussion
Topic: I use I2S DMA way to collect data from camera.More or less a pixel randomly occured when wifi is connecting.
Replies: 5
Views: 2965

I use I2S DMA way to collect data from camera.More or less a pixel randomly occured when wifi is connecting.

I use I2S DMA way to collect data from camera. Wifi is connecting,according my investigation,when esp32 collects data from camera ,more or less a pixel occured randomly.It lead to data of the line shift.So this line will be wrong.If this issue cann't be avoided,what measures should be taken on the s...
by roctwo
Thu Mar 30, 2017 7:56 am
Forum: ESP32 IDF
Topic: minicom can't connect serial port (UART)?
Replies: 8
Views: 5523

Re: minicom can't connect serial port (UART)?

Hi,dear Thanks for your suggesting,I am trying to use /dev/ttyUSB1 instead,still getting the wrong message "minicom: cannot open /dev/ttyUSB1: No such file or directory"; And I use the output of "ls /dev/ttyUSB*",getting the message"cannot access '/dev/ttyUSB*': No such file or directory"; I think m...
by roctwo
Thu Mar 30, 2017 2:32 am
Forum: ESP32 IDF
Topic: minicom can't connect serial port (UART)?
Replies: 8
Views: 5523

Re: minicom can't connect serial port (UART)?

Thank you for your reminding , I am sorry for my carelessness,the detail info as below: Hardware Information:ESP-WROVER-KIT that integrates a USB debugger,I use the USB interface connect to PC; Enviroment : Need to install OpenOCD to a Linux system to do ESP32 JTAG debugging; My reference document i...
by roctwo
Wed Mar 29, 2017 7:01 am
Forum: ESP32 IDF
Topic: minicom can't connect serial port (UART)?
Replies: 8
Views: 5523

minicom can't connect serial port (UART)?

Hi,all I am trying to set up Jtag environment for esp32 debug,but when I set up gdb environment the minicom can't connect serial port,always getting error message:"minicom: cannot open /dev/ttyUSB0: No such file or directory". Is there someting wrong for my operation , your help will be much appreci...
by roctwo
Sat Mar 25, 2017 6:34 am
Forum: General Discussion
Topic: How to set ESP32 to light sleep mode?
Replies: 6
Views: 5666

Re: How to set ESP32 to light sleep mode?

It has been more than a month since I asked the question, I would like to ask how the progress of light sleep. Our choice of esp32 is largely due to that we saw the characteristics of the "light sleep" on documents.
by roctwo
Tue Mar 14, 2017 1:01 am
Forum: General Discussion
Topic: Which pins must be pulled high or low when downloading?
Replies: 1
Views: 1317

Which pins must be pulled high or low when downloading?

Which pins must be pulled high or low when downloading?
by roctwo
Mon Mar 13, 2017 5:46 am
Forum: General Discussion
Topic: Beacon question
Replies: 0
Views: 945

Beacon question

Hi!
ESP32 as station of wifi.
First question:
When ESP32 met beacon to deal with beacon.Is beacon be handled independently by wifi core or requires xtensa CPU core to handle?
Second question:
When ESP32 is sending out data through wifi, will beacon's handling interrupts ESP32's sending?
by roctwo
Mon Mar 13, 2017 3:33 am
Forum: General Discussion
Topic: ESP32 as a I2S slave, How much is the maximum sampling rate ?
Replies: 0
Views: 1101

ESP32 as a I2S slave, How much is the maximum sampling rate ?

ESP32 as a I2S slave, How much is the maximum sampling rate ?
by roctwo
Fri Mar 10, 2017 3:03 am
Forum: General Discussion
Topic: Whether DMA's racing to control bus can stop wifi core from getting data from memory.
Replies: 0
Views: 888

Whether DMA's racing to control bus can stop wifi core from getting data from memory.

From my opinion.Data Sent through wifi,wifi core need to catch data from from memory.If DMA is running in the meantime,whether DMA's racing to control bus will stop wifi core from getting data from memory?
by roctwo
Thu Mar 09, 2017 8:10 am
Forum: ESP32 IDF
Topic: tcp socket speed 10Mbps only. How can I speed up?
Replies: 12
Views: 16089

Re: tcp socket speed 10Mbps only. How can I speed up?

Hi, interesting results. I'm facing similar problems, but worse, I can get only less than 1 Mbit/s. My configuration is: only one esp32 module connected to the AP and the computer sending the data to the module (connected to same AP via cable). Please, could you share all the example code to compar...

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