Search found 636 matches

by ESP_Sprite
Mon May 29, 2017 5:13 am
Forum: ESP32 HDK
Topic: Purpose of GPIO_OUT_W1TS_REG
Replies: 2
Views: 94

Re: Purpose of GPIO_OUT_W1TS_REG

Also, these registers make atomic operations possible in a multitasked environment. Setting a bit in a register normally means reading the register, OR'ing the value with the bit you want to set, then writing back the register. (This even happens when you write it in one operation in C, like GPIO_OU...
by ESP_Sprite
Mon May 29, 2017 5:03 am
Forum: General Discussion
Topic: I2S: dma_buf_count and dma_buf_len values for receive?
Replies: 2
Views: 33

Re: I2S: dma_buf_count and dma_buf_len values for receive?

It depends on the application. Larger buffers mean less CPU time, because the CPU can set up a DMA transaction and then go do something else for a long time. On the flip side, it also means more latency (because you have to know the entire buffer before you're able to DMA it (or use dirty hacks)) an...
by ESP_Sprite
Sun May 28, 2017 3:20 am
Forum: General Discussion
Topic: [SOLVED] Why it takes a while for the new posts and the replies ?
Replies: 2
Views: 47

Re: Why it takes a while for the new posts and the replies ?

If you're a new user, us moderators have to approve your first three messages. It's an anti-spam measure; that way spammers can't just register an account and spam away. We're usually pretty speedy in approving those things. Also, I don't see any of your post in the moderation queue... are you sure ...
by ESP_Sprite
Fri May 26, 2017 6:06 am
Forum: ESP32 HDK
Topic: VDD_SDIO for ESP32 D2WD
Replies: 14
Views: 547

Re: VDD_SDIO for ESP32 D2WD

Yes, it is eprfectlky capable of working on 3.3V (and actually will not work when fed with only 1.8V). The internal flash chip, however, is an 1.8V part. In order to generate the power supply for that, the ESP32 has an internal LDO to generate 1.8V from its 3.3V power supply. However, this power sup...
by ESP_Sprite
Fri May 26, 2017 1:49 am
Forum: ESP32 HDK
Topic: Is the temperature of the esp32 normal?
Replies: 10
Views: 196

Re: Is the temperature of the esp32 normal?

It's actually returning an ADC value, which unfortunately isn't exactly linearily correspondung to temperature.
by ESP_Sprite
Thu May 25, 2017 8:18 am
Forum: ESP32 HDK
Topic: Is the temperature of the esp32 normal?
Replies: 10
Views: 196

Re: Is the temperature of the esp32 normal?

What exactly are you doing with the chip? Are you sure your voltages are in range, and you're not shorting outputs or something like that? How are you measuring the temperature?
by ESP_Sprite
Thu May 25, 2017 1:53 am
Forum: General Discussion
Topic: HSPI and VSPI, meaning thereof?
Replies: 6
Views: 137

Re: HSPI and VSPI, meaning thereof?

Nah, I don't believe it. There's probably some chip designers named harry and victor. :P I know you're jesting, but it's actually pretty unlikely that they are names... Afaik, all the digital design guys are Chinese, and I assume that if they'd taken a name to use the initial of, they would have ta...
by ESP_Sprite
Wed May 24, 2017 1:58 am
Forum: General Discussion
Topic: HSPI and VSPI, meaning thereof?
Replies: 6
Views: 137

Re: HSPI and VSPI, meaning thereof?

That's... a good question actually. Will ask the digital guys, maybe they know. Edit: Sorry, there's no story there... just random designators. If it makes you feel better, I've always thought of them as the High-speed SPI interface and the Very High-speed SPI interface. Not that the speed actually ...
by ESP_Sprite
Sun May 21, 2017 5:33 am
Forum: ESP32 Arduino
Topic: ESP 32 Pin re-mapping
Replies: 2
Views: 385

Re: ESP 32 Pin re-mapping

Also, in general, it's not that hard. if you use a driver in esp-idf, you actually don't have to do much at all: most drivers will need to be fed the GPIO they act on in the initialization call: just enter any GPIO you want and it will be routed automatically. If you want to do it manually, these ar...
by ESP_Sprite
Sun May 21, 2017 5:18 am
Forum: ESP32 SDK
Topic: Using C++ std::stringstream and heap exceptions
Replies: 2
Views: 80

Re: Using C++ std::stringstream and heap exceptions

That is indeed the sign of a corrupted memory blocklist. One thing that comes to mind: do you exit your task with vTaskDelete? Not doing so (and just returning from the task function) leads to a crash, though I'm not sure anymore if it was this crash or something else.

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