Search found 735 matches

by ESP_Sprite
Sun Jun 25, 2017 3:54 am
Forum: ESP32 SDK
Topic: ESP32 Flashing app alone
Replies: 4
Views: 77

Re: ESP32 Flashing app alone

Yes, well, the time taken is not a very good measurement of what is flashed, given that major part of what you flash consists of the app (500K'ish) which will take so long that flashing the bootloader and partition table as well (which are 11K'ish combined and well-compressable) doesn't really incre...
by ESP_Sprite
Sun Jun 25, 2017 3:48 am
Forum: ESP32 HDK
Topic: ESP32 Minimum Hardware
Replies: 7
Views: 100

Re: ESP32 Minimum Hardware

Specifically, be sure to use a 3.3V PSU that can actually deliver 3.3V. If the ESP32 crashes somewhere around the time WiFi is initialized, most likely your power supply isn't beefy enough.
by ESP_Sprite
Sun Jun 25, 2017 3:47 am
Forum: General Discussion
Topic: Doit ESP32 DevKit v1 and SD Card Reader
Replies: 3
Views: 47

Re: Doit ESP32 DevKit v1 and SD Card Reader

Did you read the notes about GPIO12? Smells like that GPIO has the wrong signal level on bootup.
by ESP_Sprite
Sat Jun 24, 2017 12:35 pm
Forum: ESP32 SDK
Topic: ESP SPI transfer Max Size
Replies: 1
Views: 43

Re: ESP SPI transfer Max Size

Erm, it shouldn't discard the excess, the queue/transfer function should return with an error (ESP_ERR_INVALID_ARG if memory serves.) Also, the default maximum transfer size should be 4094, not 2048; are you sure you see a limit there and not at 4094? The maximum size of the transfers is settable us...
by ESP_Sprite
Fri Jun 23, 2017 3:04 pm
Forum: ESP32 SDK
Topic: ESP32 Flashing app alone
Replies: 4
Views: 77

Re: ESP32 Flashing app alone

Erm... can't say more than that it works for me. How do you conclude it flashes everything?
by ESP_Sprite
Thu Jun 22, 2017 2:23 pm
Forum: ESP32 SDK
Topic: CPU Frequency vs FreeRTOS
Replies: 10
Views: 253

Re: CPU Frequency vs FreeRTOS

Pretty simple: in general, it's not specified where the WiFi tasks will run, but in the current incarnation of esp-idf, they only run on CPU0. Because that is not in the official specs, however, this behaviour may change (or become configurable) if we see advantages to it.
by ESP_Sprite
Thu Jun 22, 2017 1:00 pm
Forum: General Discussion
Topic: ESP32 debug Eclipse+OpenOCD+JLink issue
Replies: 2
Views: 85

Re: ESP32 debug Eclipse+OpenOCD+JLink issue

What program are you trying to debug? Do you happen to use (one or more of) the GPIOs used for JTAG (GPIO12-15) for other purposes in your program?
by ESP_Sprite
Thu Jun 22, 2017 10:07 am
Forum: General Discussion
Topic: WROOM32 v1.0 vs v1.1 different trace antenna layout
Replies: 5
Views: 150

Re: WROOM32 v1.0 vs v1.1 different trace antenna layout

I'll ask around to see if I can find out what the latest revision is. If you want to have specific versions, your best bet may be to contact sales@espressif.com; they should be able to work something out for you.
by ESP_Sprite
Thu Jun 22, 2017 9:55 am
Forum: Report Bugs
Topic: esp-idf-template-master sample program not working
Replies: 14
Views: 266

Re: esp-idf-template-master sample program not working

ESP32s can generate spikes of up to 500mA or so when calibrating WiFi, which is the reason that with a bad power supply they usually crap out at that point (and people complain about WiFi crashes when they try to feed an ESP32 module from the 3.3V output of their USB-to-serial board). That being sai...

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