Search found 1841 matches

by ESP_Sprite
Wed Sep 19, 2018 4:41 am
Forum: ESP32 IDF
Topic: Finding the Data Buffer before sending the DAC pins, I need to apply an FFT to the signals.
Replies: 2
Views: 48

Re: Finding the Data Buffer before sending the DAC pins, I need to apply an FFT to the signals.

Your description doesn't make sense. Data buffer for what? What are you trying to do in the first place, as in what's the bigger picture, what problem are you trying to solve?
by ESP_Sprite
Wed Sep 19, 2018 4:37 am
Forum: ESP32 IDF
Topic: Special baud rate
Replies: 1
Views: 20

Re: Special baud rate

The ESP32 has a fractional baud rate generator. The calculation of the divider for this is (apb_clk*16)/baudrate. The apb_clk normally is 80MHz. So e.g. for 115555 baud, you'd get a divider of ((8000000*16)/(115555)) = 1107.698. Because this number needs to be integer, it's rounded up to 1108, which...
by ESP_Sprite
Wed Sep 19, 2018 4:28 am
Forum: Hardware
Topic: ESP-Wrover-Kit and ADS1220
Replies: 2
Views: 39

Re: ESP-Wrover-Kit and ADS1220

The CLK, SDx, etc lines you connected your ADS1220 to are used to connect the ESP32 to its flash chip, where the code is stored. (See e.g. the datasheet of the ESP-Wrover for the connections.) Suggest you use different pins; at the moment there's no software support for using the flash pins for anyt...
by ESP_Sprite
Wed Sep 19, 2018 4:24 am
Forum: General Discussion
Topic: Implementation of 6LoWPAN using ESP32-devkitc v4
Replies: 1
Views: 57

Re: Implementation of 6LoWPAN using ESP32-devkitc v4

6lowpan normally is run over 802.15.4, the ESP32 does not support that out of the box (doesn't have the radio for it).
by ESP_Sprite
Wed Sep 19, 2018 4:23 am
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 236
Views: 36107

Re: What would you like to see in The Next Chip?

But most of all, instead of cramming everything in a single device, why not have cheap I/O extenders which implement some a coherency protocol? TileLink comes to mind. The problem mostly is pin usage and speed. TileLink is an on-chip communication protocol first and foremost. Now, nothing is stoppi...
by ESP_Sprite
Wed Sep 19, 2018 4:14 am
Forum: General Discussion
Topic: VFS directory structure support.
Replies: 1
Views: 31

Re: VFS directory structure support.

How do you mean "directory structure is not supported"? As far as I am aware, VFS supports it perfectly well. Some filesystems you can use in combination with VFS have limitations (spiffs, for instance), perhaps that's what you're referring to?
by ESP_Sprite
Mon Sep 17, 2018 8:58 am
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 236
Views: 36107

Re: What would you like to see in The Next Chip?

Kudos for asking! Opening up for input from all your customers like this is a bold move as what you get is a mixed bag of goodies without any commit to volumes. Aye, but it helps lots with regards to brainstorming. Also, while we obviously are very interested in customers who buy millions of our ch...
by ESP_Sprite
Mon Sep 17, 2018 7:51 am
Forum: Hardware
Topic: Which pins would you recommend for alternative HWSerial
Replies: 1
Views: 59

Re: Which pins would you recommend for alternative HWSerial

12 and 14 are part of the JTAG port, if you ever want to use JTAG, I'd not use those. 25 and 26 are the DAC ports, if you ever want to generate an analog signal, I'd not use those. 34 to 39 are input-only pins and can't have pull-ups or -downs, so you can only use those for RxD and you cannot have a...
by ESP_Sprite
Mon Sep 17, 2018 7:46 am
Forum: Hardware
Topic: Guidelines for external antenna layout
Replies: 11
Views: 3141

Re: Guidelines for external antenna layout

Long story short: Using both will lead to impedance mismatches, which leads to Bad Stuff (tm). If you look at it with eyes not accustomed to seeing the deeper mysteries of RF magic, you'd say the antenna is just an unconnected trace. However, at 2.4GHz it actually is an active element, and having it...
by ESP_Sprite
Mon Sep 17, 2018 7:42 am
Forum: General Discussion
Topic: Mac power supply insufficient for WROVER Kit?
Replies: 1
Views: 55

Re: Mac power supply insufficient for WROVER Kit?

Could be. If you have the chance, try exchanging the USB cable: this issue sometimes also is caused bu too much voltage drop because the USB cable isn't beefy enough.

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