Search found 1914 matches

by WiFive
Fri Oct 21, 2016 8:38 am
Forum: General Discussion
Topic: ESP32 I2S input and output interface
Replies: 13
Views: 7475

Re: ESP32 I2S input and output interface

ESP_Sprite wrote:Unfortunately, I2S documentation is not ready yet indeed.


No updates to TRM or drivers in almost a month. :(
by WiFive
Fri Oct 21, 2016 5:53 am
Forum: Hardware
Topic: ESP32 HW SPI : Pins for MOSI, MISO, SCK , ( CS )
Replies: 4
Views: 8386

Re: ESP32 HW SPI : Pins for MOSI, MISO, SCK , ( CS )

kolban wrote:What is "VSPI"?


ESP32 features three SPIs (SPI, HSPI and VSPI) in slave and master modes. Also known as SPI1, SPI2, SPI3?

In master mode
SPID = MOSI = data out
SPIQ = MISO = data in

In slave mode
swapped or same??
by WiFive
Thu Oct 20, 2016 5:46 am
Forum: General Discussion
Topic: ESP32 SRAM examples
Replies: 14
Views: 8191

Re: ESP32 SRAM examples

dotthree wrote:Whats the newlib option?


https://github.com/espressif/esp-idf/is ... -253723520
by WiFive
Thu Oct 20, 2016 4:34 am
Forum: General Discussion
Topic: ESP32 SRAM examples
Replies: 14
Views: 8191

Re: ESP32 SRAM examples

the current chip revision has a bug causing some reads of it to act up. We're preparing a new revision with that bug fixed, it should be on the market in two to three months. To clarify is this a software/firmware issue or silicon issue? Sounds like silicon. Maybe they can also take this opportunit...
by WiFive
Thu Oct 20, 2016 2:54 am
Forum: General Discussion
Topic: ESP32 SRAM examples
Replies: 14
Views: 8191

Re: ESP32 SRAM examples

ESP_Sprite wrote:We're preparing a new revision with that bug fixed, it should be on the market in two to three months.


Approx how many devices will be affected and what will be the code for the new rev? Will be hard to tell if under a module shield.
by WiFive
Wed Oct 19, 2016 11:57 pm
Forum: General Discussion
Topic: ESP32 SRAM examples
Replies: 14
Views: 8191

Re: ESP32 SRAM examples

viewtopic.php?f=5&t=19&p=1246&hilit=Sram#p1246

Curious to know what SRAM chips you are considering?
by WiFive
Wed Oct 19, 2016 11:55 pm
Forum: General Discussion
Topic: Status of ESP32 WROOM Module
Replies: 8
Views: 4467

Re: Status of ESP32 WROOM Module

Is there any difference between the WROOM32 and ESP3212 mechanical design and pinout? They appear to be very similar. ESP3212 has a different pinout, however Ai-Thinker is now also making the ESP32S. When I asked Ai-Thinker they told me the ESP32S is the same as the Espressif ESP-WROOM32. Sprite ma...
by WiFive
Tue Oct 18, 2016 1:18 am
Forum: ESP32 IDF
Topic: system_adc1_read not available ?
Replies: 5
Views: 1959

Re: system_adc1_read not available ?

We are all waiting eagerly for documentation and drivers for ADC/RTC systems.
by WiFive
Mon Oct 17, 2016 7:02 am
Forum: ESP32 IDF
Topic: How to use gpio_isr_register?
Replies: 44
Views: 13685

Re: How to use gpio_isr_register?

Read technical reference manual about interrupt matrix. Interrupt matrix maps peripheral interrupts (table 6) to CPU interrupts (table 7). CPU interrupts have one interrupt handler function, so you have to pick and choose which sources will trigger the same interrupt number and thus share a handler ...
by WiFive
Mon Oct 17, 2016 2:11 am
Forum: Hardware
Topic: [Solved] DevKitC - How much current can we source from 5V pin?
Replies: 2
Views: 1922

Re: DevKitC - How much current can we source from 5V pin?

Depends on what is the USB power source. For a PC port probably 500mA total, shared with 3.3v LDO. Looks like HC-SR04 only uses <20mA, so should be OK. Might need some additional decoupling caps? Might need 3.3v to 5v level shifting?