Search found 2113 matches

by ESP_Angus
Mon Oct 31, 2016 12:38 am
Forum: ESP32 IDF
Topic: UART question/WROOM-32
Replies: 3
Views: 8403

Re: UART question/WROOM-32

Thanks Kanflo for posting a great summary. :) Re: "performance tradeoffs", the tradeoff from routing a signal via the GPIO Matrix is a small amount of latency (2 clock cycles of the peripheral APB clock, at the default 80MHz clock this is 25 nanoseconds) and a lower maximum signal speed of 40MHz. Th...
by ESP_Angus
Sun Oct 30, 2016 10:32 pm
Forum: Hardware
Topic: Pull-down on MTDI pin with 1.8v memory
Replies: 1
Views: 2328

Re: Pull-down on MTDI pin with 1.8v memory

Hi Singe12, If you pull MTDI high on reset then the internal VDD_SDIO regulator will start up at 1.8V not 3.3V. The value of the pin is read before this power domain's regulator is enabled, and before any user code can be executed (as the user code is loaded from flash). If you pull the pin down (or...
by ESP_Angus
Tue Oct 25, 2016 5:15 am
Forum: General Discussion
Topic: MD5 Error while Flashing the boot.bin to ESP32
Replies: 22
Views: 17201

Re: MD5 Error while Flashing the boot.bin to ESP32

The fix for this bug was merged into esp-idf yesterday, since revision f988dc9.

Thanks everyone for the help diagnosing the issue and testing the fix.
by ESP_Angus
Tue Oct 25, 2016 12:11 am
Forum: ESP32 IDF
Topic: [Answered] How to build a subset of the possible components in ESP-IDF?
Replies: 24
Views: 13642

Re: How to build a subset of the possible components in ESP-IDF?

entry to explicitly name the the components I wish to include (the default would otherwise be all that could be found). However when I try this (for example setting COMPONENTS=nvs_flash), I find that the compilation of my app template now fails: This is possible, but it's a bit sub-optimal right no...
by ESP_Angus
Sun Oct 23, 2016 11:11 pm
Forum: ESP32 IDF
Topic: A fatal error occurred: Failed to connect to ESP32: Invalid head of packet ('p')
Replies: 23
Views: 37832

Re: A fatal error occurred: Failed to connect to ESP32: Invalid head of packet ('p')

Unfortunately, the fixes reported by hydrabus & rudi rely on a silicon bug (the chip resets twice following a power on reset) which has been fixed in the forthcoming next silicon revision of the ESP32. Also, the timing of the two signals (and the IO0 "glitch") appears to be a Windows driver level be...
by ESP_Angus
Sun Oct 23, 2016 10:49 pm
Forum: ESP32 IDF
Topic: User API manual for ESP32 esp-idf
Replies: 6
Views: 8045

Re: User API manul for ESP32 esp-idf

Hi Ritesh, The esp-idf repository README and docs directory contains guides for getting up and running with esp-idf: https://github.com/espressif/esp-idf#using-espressif-iot-development-framework-with-the-esp32 The examples directory contains some basic examples that you can copy and use as a basis ...
by ESP_Angus
Wed Oct 19, 2016 9:08 pm
Forum: General Discussion
Topic: Status of ESP32 WROOM Module
Replies: 7
Views: 7165

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 ESP_Angus
Tue Oct 18, 2016 10:42 pm
Forum: Report Bugs
Topic: Bios Default BAUD [esp8266]
Replies: 4
Views: 6106

Re: Bios Default BAUD [esp8266]

Thanks for updating Kevin. The 74880 on esp8266 is an artifact of the crystal speed (if you use a 40MHz crystal the baud rate is 115200, but everyone uses 26MHz crystals so it's proportionally lower.) On ESP32 the default baud rate is 115200 regardless of crystal clock rate.
by ESP_Angus
Tue Oct 18, 2016 10:35 pm
Forum: General Discussion
Topic: RTOS_SDK template problem
Replies: 4
Views: 3399

Re: RTOS_SDK template problem

So if the RTOS_SDK is not working for my board, then can I get some information about the ADC? Like - register description, because I can see the registers in the ADC header file but I find no documentation. Maybe it's still under development? That's correct. Technical reference documentation & sam...
by ESP_Angus
Tue Oct 18, 2016 10:33 pm
Forum: ESP32 IDF
Topic: A fatal error occurred: Failed to connect to ESP32: Invalid head of packet ('p')
Replies: 23
Views: 37832

Re: A fatal error occurred: Failed to connect to ESP32: Invalid head of packet ('p')

I have done some Sigrok (PulseView) capture of the signals (tested with Windows7) Thanks hydrabus. That's interesting, your IO0 delay is closer to 2ms than the 4ms I was seeing. But same pattern. self._port.setDTR(False) # GPIO0 -> 1 self._port.setRTS(True ) # RST -> 0 self._port.setDTR(True ) # GP...

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