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by Vader_Mester
Thu Jul 26, 2018 2:01 pm
Forum: Hardware
Topic: NEW ESP32 Dev Board, Announcement
Replies: 14
Views: 5528

Re: NEW ESP32 Dev Board, Announcement

Looks cool. I like the idea of an ATSAML uC. Which version of the SAML21 you plan on using?
by Vader_Mester
Thu Jul 26, 2018 12:13 pm
Forum: General Discussion
Topic: Maximum memory allocation
Replies: 4
Views: 2117

Re: Maximum memory allocation

For heap allocation read this. I think it's better to use these functions.
https://esp-idf.readthedocs.io/en/lates ... alloc.html

There is an option in Menuconfig to enaple Heap allocation in SPI RAM.
Image
by Vader_Mester
Thu Jul 26, 2018 11:14 am
Forum: Showcase
Topic: ESPi32 - SBC concept with ESP32
Replies: 2
Views: 1602

Re: ESPi32 - SBC concept with ESP32

This looks very good. Will design be open sourced? Of course! This is why I'm posting this here 8-) And I keep posting as I progress. For the moment I'm focusing on the hardware part, and I'm hoping to find a competent people who can help me on the software side, to be tested on the shipped boards....
by Vader_Mester
Thu Jul 26, 2018 7:31 am
Forum: General Discussion
Topic: ESP32 to play sounds, what possibilities there are to receive them OTA?
Replies: 1
Views: 615

Re: ESP32 to play sounds, what possibilities there are to receive them OTA?

First of all, there are very good and detailed sound projects for the ESP32. Second, you don't really need to use OTA. In our terms, OTA is used for updating the entire firmware of the ESP32, which is not needed if only the sound files need an update. You can create a FAT-FS file system on your flas...
by Vader_Mester
Wed Jul 25, 2018 10:09 am
Forum: Showcase
Topic: ESPi32 - SBC concept with ESP32
Replies: 2
Views: 1602

ESPi32 - SBC concept with ESP32

Dear All, I'm currently working on a design, aiming to help makers and developers alike, to get the most out of an ESP32 system. I wanted to create something that can use a UI interface, and felxible enough for big projects. The board shown below will be a Raspberry Pi form factor, and as you can se...
by Vader_Mester
Tue Jul 24, 2018 6:34 am
Forum: General Discussion
Topic: Gripes on ESP32/ESP-IDF
Replies: 44
Views: 10938

Re: Gripes on ESP32/ESP-IDF

So how do I calculate microsecond time interval c0=xthal_get_ccount() c1=(xthal_get_ccount()-c0) / ncyclesinmicrosec ??? Kind of. The CCOUNT register is a register in the CPU. According to the Xtensa docs, it's supposed to increment each clock cycle. So if running the ESP32 on 240MHz, it will last ...
by Vader_Mester
Mon Jul 23, 2018 1:36 pm
Forum: General Discussion
Topic: Gripes on ESP32/ESP-IDF
Replies: 44
Views: 10938

Re: Gripes on ESP32/ESP-IDF

I would like to see an example of precise time measurement and how to easily convert ticks to microseconds. There is a possibility to read the cycle count registers, which then can be converted to uSeconds. See my post about this here. I also wrote a delay function, which should work in theory. Thi...
by Vader_Mester
Mon Jul 23, 2018 11:49 am
Forum: General Discussion
Topic: (Noob) Schematic Question
Replies: 2
Views: 945

Re: (Noob) Schematic Question

I suggest you implement this circuit (see below pic). This will enable you to use any external UART interface. Also, please place a 0,1uF capacitor to the EN pin. This can be a 10% regural ceramic cap, 25V, which is used in every dev board. There were other notations on the forum with some timing is...
by Vader_Mester
Mon Jul 23, 2018 8:47 am
Forum: General Discussion
Topic: Gripes on ESP32/ESP-IDF
Replies: 44
Views: 10938

Re: Gripes on ESP32/ESP-IDF

The thing that drive me nuts the most is the fact that you don't actually grasp what's exactly happening in the background while your program is running. Specially FreeRTOS, because I always keep thinking about all the software times, and interrupts, and other stuff that goes in the background, and ...
by Vader_Mester
Fri Jul 20, 2018 11:51 am
Forum: General Discussion
Topic: ESP32 Wroom-32 board GPIO25 can't be INPUT
Replies: 3
Views: 1096

Re: ESP32 Wroom-32 board GPIO25 can't be INPUT

The pull-up is enabled on this pin. I (126) gpio: GPIO[25]| InputEn: 1| OutputEn: 0| OpenDrain: 0| Pullup: 1 | Pulldown: 0| Intr:0 This means that it will be high unless something shorts it down to ground. In this case, since it is an input, your external circuitry that outputs to this pin must pull...

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