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by ESP_Sprite
Thu Apr 15, 2021 8:43 am
Forum: ESP32 Arduino
Topic: Where to find the archives source code?
Replies: 2
Views: 81

Re: Where to find the archives source code?

Those are (mostly) esp-idf libraries; the sources are in esp-idf. See e.g. here for how they get built.
by ESP_Sprite
Thu Apr 15, 2021 8:40 am
Forum: ESP32 Arduino
Topic: Com port shuts down when uploading ESP32
Replies: 6
Views: 174

Re: Com port shuts down when uploading ESP32

ESP-Spirit I'm not sure what you mean by "Are you powering the ESP32 through the 3.3V generated by that Cp2104 chip, perhaps?". I am using the USB cable. In all likelihood, that USB cable either uses the CP2104 chip in it as the source for 3.3V, or has some other small LDO that delivers it. Either ...
by ESP_Sprite
Wed Apr 14, 2021 1:15 am
Forum: ESP32 Arduino
Topic: Com port shuts down when uploading ESP32
Replies: 6
Views: 174

Re: Com port shuts down when uploading ESP32

Are you powering the ESP32 through the 3.3V generated by that Cp2104 chip, perhaps?
by ESP_Sprite
Wed Apr 14, 2021 1:12 am
Forum: ESP-IDF
Topic: pin timer callback to specific core?
Replies: 2
Views: 124

Re: pin timer callback to specific core?

From what I call, the esp_timer subsystem does callbacks from its own task; it may be configurable in Menuconfig on what core it runs. Esp_timer is a shared resource as in: if something else has scheduled a callback at the same time as your program, your callback could be delayed until the earlier c...
by ESP_Sprite
Wed Apr 14, 2021 1:09 am
Forum: ESP-IDF
Topic: Problem with reboot W/O backtrace on ESP32 - esp-idf 3.0.9
Replies: 9
Views: 372

Re: Problem with reboot W/O backtrace on ESP32 - esp-idf 3.0.9

Do you have enough decoupling on your voltage lines? Especially with a slow-reacting power supply, putting a few uF near the ESP32 itself may help. (Also, only just saw you're using ESP-IDF 3.0 - that one went out of support a while ago. Not saying it'll solve your issue, but you may want to think o...
by ESP_Sprite
Wed Apr 14, 2021 12:59 am
Forum: ESP-IDF
Topic: Broadcasting data via classic bluetooth
Replies: 2
Views: 107

Re: Broadcasting data via classic bluetooth

You're probably better off poking sales @ espressif . com with this question; they have experience getting people through testing procedures like that.
by ESP_Sprite
Tue Apr 13, 2021 5:48 am
Forum: General Discussion
Topic: RTC slows down, affecting DMA and serial output
Replies: 4
Views: 186

Re: RTC slows down, affecting DMA and serial output

A busy interrupt could impact how everything else that is CPU bound runs, but I'm having a hard time explaining e.g. the baud rate change, as this is something set in hardware. Can I ask what hardware you are using, and would you be OK with sharing code that shows this effect?
by ESP_Sprite
Tue Apr 13, 2021 5:37 am
Forum: ESP32 Arduino
Topic: Why SSD1306 OLED display get scrambled text when printing messages from tasks pinned to Core0 in RTOS?
Replies: 1
Views: 98

Re: Why SSD1306 OLED display get scrambled text when printing messages from tasks pinned to Core0 in RTOS?

The only thing I can think of is that display.display() is still doing things even after the call itself returns; as the mutex is unlocked after, perhaps the 2nd thread overwrites some information it uses. You'd need to take a good, hard look at the lib code to see if that's true, though.
by ESP_Sprite
Tue Apr 13, 2021 1:53 am
Forum: ESP-IDF
Topic: Problem with reboot W/O backtrace on ESP32 - esp-idf 3.0.9
Replies: 9
Views: 372

Re: Problem with reboot W/O backtrace on ESP32 - esp-idf 3.0.9

Still sounds like a power issue, to be honest... I am applying 3.6V on VIN with 1A limit on a power supply so it can't come from power supply I guess. VIN? Of what devboard? Many devboards have a regulator that requires a larger voltage difference between Vin and the output 3.3V. For instance, the A...
by ESP_Sprite
Tue Apr 13, 2021 1:47 am
Forum: Hardware
Topic: ESP8266-DEVKITC Communication
Replies: 1
Views: 101

Re: ESP8266-DEVKITC Communication

Are you sure you're using an USB cable capable of data transfers, and not one that is power-only?

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