Search found 210 matches

by Vader_Mester
Tue Oct 16, 2018 7:52 pm
Forum: General Discussion
Topic: DMA to 8-bit shift register for GPIO pourposes
Replies: 10
Views: 608

Re: DMA to 8-bit shift register for GPIO pourposes

I did not do any software tests yet.
The FT81x can operate with 30MHz SPI clock, well enough for almost everything.
by Vader_Mester
Thu Oct 11, 2018 10:41 am
Forum: General Discussion
Topic: SPI Maximum speed
Replies: 12
Views: 1319

Re: SPI Maximum speed

I'm 100% sure that I have a 40MHz crystal. Check attachment too. I will try first to include SPI_DEVICE_NO_DUMMY in order to ignore this checking, as the error message in red is saying. If it doesn't work, I will go to the registers :) Why did I forget about the GPIO MUX? You can route your SPI dir...
by Vader_Mester
Thu Oct 11, 2018 9:22 am
Forum: ESP32 Arduino
Topic: ESP32 Webserver - Client keeps reconnecting after client.stop
Replies: 3
Views: 170

Re: ESP32 Webserver - Client keeps reconnecting after client.stop

Actually I have just figured it out! What I'm doing, is that I store the IP of the first connection, serve the client and try to stop it. From the console logs, I noticed that the browser is set to keep-alive, although I send a header with a connection: stop. This bit is strange but this means the b...
by Vader_Mester
Wed Oct 10, 2018 11:05 am
Forum: General Discussion
Topic: SPI Maximum speed
Replies: 12
Views: 1319

Re: SPI Maximum speed

I am using ESP-WROOM-32D module on the devkitc. I see that the module has a 40 MHz crystal. Then how can I verify what you say about the internal bus clock? Where is that located? Isn't that derived from the CPU's clock as well? Actually, I said a bit of bullsh*t above. The APB_CLK the SPI periferi...
by Vader_Mester
Wed Oct 10, 2018 10:00 am
Forum: General Discussion
Topic: SPI Maximum speed
Replies: 12
Views: 1319

Re: SPI Maximum speed

I am having the same issue, but probably has to do with the CPU frequency. I can measure SPI at maximum 26 MHz. When I set it at 40, my scope doesn't show any signals. How can I change the CPU frequency higher? Is the function included in one of the examples? SPI clock is independent of CPU clock. ...
by Vader_Mester
Wed Oct 10, 2018 9:13 am
Forum: ESP32 Arduino
Topic: ESP32 Webserver - Client keeps reconnecting after client.stop
Replies: 3
Views: 170

ESP32 Webserver - Client keeps reconnecting after client.stop

Hi Guys, I'm having this issue with one of the webserver examples (turns out most examples are written this way), that even though I send "Connection: close" in the header, and even though I call Client.stop(); the broweser keeps reconnecting, and keeping the Webserver busy, making it unab...
by Vader_Mester
Thu Oct 04, 2018 10:01 am
Forum: Showcase
Topic: Yet Another OV7670 Cam to LCD with some differences...
Replies: 2
Views: 248

Re: Yet Another OV7670 Cam to LCD with some differences...

Interesting project.
I wanted to use the same method by connecting a HyperBUS RAM and an LCD, the RAM acting as a fast frame buffer for the ESP32 to modify.
I might revisit this idea, after seeing this :)

Vader[BEN]
by Vader_Mester
Thu Oct 04, 2018 9:35 am
Forum: Showcase
Topic: FT81X shield for ESP32 DevKitC
Replies: 10
Views: 772

Re: FT81X shield for ESP32 DevKitC

Quick update: Yes I'm still working on it, currently laying out the board itself. It's not a small PCB (About 100x60mm), and it's a mayor pain to rout it as a 2layer board (for cost saving), but I'm in progress.
Once I'm done, I'll update the schematic and post the files up here.

Vader[BEN]
by Vader_Mester
Tue Sep 18, 2018 6:53 am
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 251
Views: 40233

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

I think the inclusion of a 6LoWpan radio interface would make it such a widely usable solution!
by Vader_Mester
Mon Sep 17, 2018 2:29 pm
Forum: General Discussion
Topic: Esp32 and audio (text to speech)
Replies: 4
Views: 249

Re: Esp32 and audio (text to speech)

A better approach would be to get a sample lybrary in a .wav formats, convert it down to 8kHz sample rate PCM (10bit or 8bit for speech is enough), and store every sample as a binary array in a header file, with every character having it's own array. This is the way people store character font info ...

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