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by ESP_Sprite
Mon Aug 21, 2017 12:34 am
Forum: ESP32 Arduino
Topic: Serial and WiFi LED Strip Unreliability
Replies: 1
Views: 23

Re: Serial and WiFi LED Strip Unreliability

The Adafruit lib seems to bitbang the LEDs using busy-wait loops, which is incredibly fragile, as you have seen. The ESP32 has a bunch of peripherals (SPI, RMT, I2S) that are way better suited to the task, and there are libraries (like this one ) that uses those to get a better result. Maybe you can...
by ESP_Sprite
Mon Aug 21, 2017 12:27 am
Forum: ESP32 HDK
Topic: Can we run the ESP32 on 2x AA batteries
Replies: 2
Views: 60

Re: Can we run the ESP32 on 2x AA batteries

This is entirely unofficial and you shouldn't make a commercial product on this, but I think in practice it would work mostly OK. The ESP32 can actually handle a fairly large range of power supply voltages (down to 2V or so, if memory serves), it's usually the flash that craps out, and that happens ...
by ESP_Sprite
Sun Aug 20, 2017 4:13 am
Forum: ESP32 SDK
Topic: Can I run non freeRTOS code on one core
Replies: 6
Views: 146

Re: Can I run non freeRTOS code on one core

I personally have no issues using make... but if you want a more high-level IDE, maybe Eclipse can work for you? http://esp-idf.readthedocs.io/en/latest ... ndows.html
by ESP_Sprite
Sun Aug 20, 2017 4:07 am
Forum: General Discussion
Topic: Load code to certain regions of the flash
Replies: 8
Views: 230

Re: Load code to certain regions of the flash

Well, it's going to be hairy at any rate. It's essentially a catch-22: because you don't know where your static variables live, you need a pointer to these in a known location, but because the only known locations can be relative to your code, they have to be in read-only memory. The options I see a...
by ESP_Sprite
Sun Aug 20, 2017 3:49 am
Forum: General Discussion
Topic: Problems using Gpio36 as gpio sensor_vp
Replies: 1
Views: 27

Re: Problems using Gpio36 as gpio sensor_vp

What hardware (as in devboard) are you using?
by ESP_Sprite
Sat Aug 19, 2017 8:54 am
Forum: General Discussion
Topic: Load code to certain regions of the flash
Replies: 8
Views: 230

Re: Load code to certain regions of the flash

FWIW, I've been looking at this a little longer. In essence, normal OSses also have this problem because a program in e.g. Linux has to be able to load multiple shared libraries per process, so the shared libraries can't use fixed addresses for their static/global variables. That is solved in one of...
by ESP_Sprite
Sat Aug 19, 2017 4:12 am
Forum: ESP32 HDK
Topic: questions/Issues with custom implementation (Xtal, jtag, etc..)
Replies: 7
Views: 107

Re: questions/Issues with custom implementation (Xtal, jtag, etc..)

rezarethink: No clue why VisualGDB doesn't do the right thing; my guess would be that it expects some kind of firmware to pre-exist in flash that initializes CPU1. Maybe you're better off asking the VisualGDB people this. On why the serial port does not work: Are you sure you're pulling down GPIO0 a...
by ESP_Sprite
Sat Aug 19, 2017 4:07 am
Forum: ESP32 HDK
Topic: questions/Issues with custom implementation (Xtal, jtag, etc..)
Replies: 7
Views: 107

Re: questions/Issues with custom implementation (Xtal, jtag, etc..)

wormyrocks wrote:Hello,

I am building on top of the WROOM-02 development board...


You are aware that the WROOM-02 contains an ESP8266, not an ESP32? Do you mean the WROOM32?
by ESP_Sprite
Sat Aug 19, 2017 4:00 am
Forum: ESP32 SDK
Topic: Can I run non freeRTOS code on one core
Replies: 6
Views: 146

Re: Can I run non freeRTOS code on one core

In the current setup, unfortunately having your own code running on Core1 exclusively is sort-of hard: there are some things where the hardware requires cooperation between the two CPUs. From memory, one of those things is writing to flash (which disables the flash cache, which can make the program ...
by ESP_Sprite
Sat Aug 19, 2017 3:51 am
Forum: ESP32 SDK
Topic: Compile error with Compiler options - Optimization Level (Release (-Os))
Replies: 3
Views: 50

Re: Compile error with Compiler options - Optimization Level (Release (-Os))

I seem to remember that we ran into and solved these issues a while ago... are you sure you're on the latest master? If not, can you do a git pull and a git submodule update and see if you still get this?

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