Search found 7 matches

by t_bostanjyan
Thu Mar 02, 2017 8:28 am
Forum: General Discussion
Topic: ESP32 DAC quality
Replies: 3
Views: 9595

ESP32 DAC quality

How good is ESP32 DAC quality for audio applications?
I want to connect DAC output to the audio amplifier and pass to the speaker. But I'm not sure about DAC quality for audio.
Of course I don't expect very high quality sounds. But I expect at least understandable speech.
Any suggestions?
by t_bostanjyan
Tue Feb 21, 2017 12:22 pm
Forum: General Discussion
Topic: SPI speed via GPIO matrix
Replies: 2
Views: 2323

Re: SPI speed via GPIO matrix

Thank you!!!
by t_bostanjyan
Tue Feb 21, 2017 10:26 am
Forum: General Discussion
Topic: SPI speed via GPIO matrix
Replies: 2
Views: 2323

SPI speed via GPIO matrix

What is the maximum SPI speed connected via GPIO matrix?
by t_bostanjyan
Tue Jan 31, 2017 2:29 pm
Forum: General Discussion
Topic: ESP32 arduino flash size
Replies: 1
Views: 3300

ESP32 arduino flash size

Here is the ESP32 recourse usage report in Arduino: Sketch uses 151,467 bytes (14%) of program storage space. Maximum is 1,044,464 bytes. Global variables use 20,496 bytes (6%) of dynamic memory, leaving 274,416 bytes for local variables. Maximum is 294,912 bytes. My SPI flash size is 4 Mbytes so wh...
by t_bostanjyan
Tue Jan 31, 2017 1:52 pm
Forum: General Discussion
Topic: ESP32 external SRAM connection pins
Replies: 1
Views: 1873

ESP32 external SRAM connection pins

Hi,

In which SPI port should I connect the external SPI SRAM?

Thanks.
by t_bostanjyan
Thu Jan 05, 2017 4:30 pm
Forum: General Discussion
Topic: ESP32 ROM update
Replies: 8
Views: 7533

Re: ESP32 ROM update

Kolban, Thank you very much for your response. Now it is more clear for me. So it is not possible to reprogram ROM, which is good. Could you please let me know where are located WiFi and Bluetooth stacks? In the ROM or it comes with the firmware? If I program ESP32 module via Arduino environment wha...
by t_bostanjyan
Thu Jan 05, 2017 10:30 am
Forum: General Discussion
Topic: ESP32 ROM update
Replies: 8
Views: 7533

ESP32 ROM update

Hi, I have several questions about ESP32 ROM and firmware. 1. I don't understand well the meaning of firmware. Is it the software located in the internal ROM? Or is it located in the external flash. 2. If it is located in the internal ROM then I need firmware sources to make changes and then update ...

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