Search found 3467 matches

by ESP_Sprite
Wed May 20, 2020 5:37 am
Forum: Hardware
Topic: Need help with dump - have to exchange ESP32-WRover
Replies: 1
Views: 142

Re: Need help with dump - have to exchange ESP32-WRover

It depends - if flash encryption is disabled, you should be able to either use the rom download mode or just open the Wrover, desolder the flash chip and read out the data. If flash encryption is enabled, there's not really an easy way.
by ESP_Sprite
Tue May 19, 2020 11:43 am
Forum: ESP32 IDF
Topic: ESP32 hanging forever
Replies: 4
Views: 245

Re: ESP32 hanging forever

Hard to say. May be that your program is running in a state that is technically valid but just doesn't output anything... You could hook up a timer or a button to an interrupt and crash the system using that; that should give you a panic and a backtrace or core dump.
by ESP_Sprite
Tue May 19, 2020 7:13 am
Forum: Hardware
Topic: Problem with simultaneous use of spi and wifi DMA controllers
Replies: 9
Views: 377

Re: Problem with simultaneous use of spi and wifi DMA controllers

What reason do you have to think the DMA transfer gets interrupted then?
by ESP_Sprite
Tue May 19, 2020 7:12 am
Forum: Hardware
Topic: Why is MTDI of ESP32-PICO-KIT pulled high?
Replies: 2
Views: 146

Re: Why is MTDI of ESP32-PICO-KIT pulled high?

Probably just to have options, either for production or for the end user. Out HW team tends to put NC components in places where it might make sense that someone may possibly want one.
by ESP_Sprite
Tue May 19, 2020 7:02 am
Forum: Hardware
Topic: Need help to connect esp-wroom-s2 with serial
Replies: 8
Views: 332

Re: Need help to connect esp-wroom-s2 with serial

Ooh, that is confusing... seemingly the ESP-Wroom-S2 is an older ESP8266 product that happens to have 'S2' in the name. It has nothing to do with the ESP32-S2 chip. The ESP32-S2 Wroom variant is called ESP32-S2-WROOM.
by ESP_Sprite
Mon May 18, 2020 6:28 pm
Forum: Hardware
Topic: Problem with simultaneous use of spi and wifi DMA controllers
Replies: 9
Views: 377

Re: Problem with simultaneous use of spi and wifi DMA controllers

Still, DMA being slow is pretty much an impossibility... from what I recall, a DMA underrun pretty much is a fatal condition; the SPI peripheral will abort instead of just stopping to transmit for a while. How are you queueing the 30K of data? All in one transaction, or in many small transactions? I...
by ESP_Sprite
Mon May 18, 2020 3:56 pm
Forum: Hardware
Topic: SPI device not working after deep sleep wake up
Replies: 4
Views: 287

Re: SPI device not working after deep sleep wake up

BUT result indicates the device is in a bad state.
How does this show?
by ESP_Sprite
Mon May 18, 2020 3:55 pm
Forum: Hardware
Topic: Problem with simultaneous use of spi and wifi DMA controllers
Replies: 9
Views: 377

Re: Problem with simultaneous use of spi and wifi DMA controllers

spi initialized on core 1 and wifi on core 0. I was told that two DMA may not have simultaneous access to RAM. but spi without dma uses core 1 for all work and why he has no problem with access to RAM when wifi Dma receiving data? It depends. The memory bus is really fast, however, and all DMA in t...
by ESP_Sprite
Mon May 18, 2020 7:09 am
Forum: ESP32 Arduino
Topic: How to eliminate serial header?
Replies: 4
Views: 257

Re: How to eliminate serial header?

Not to suppress the output. In theory, another way to skin this (if you have complete control over your hardware) is not to use the default TxD/RxD pins and switch UART0 over to your custom pins as soon as you finished booting. Not 100% sure how you'd do that in the Arduino environment, though.
by ESP_Sprite
Mon May 18, 2020 7:05 am
Forum: ESP32 IDF
Topic: How to use i2s_read and i2s_write simultaneously?
Replies: 2
Views: 176

Re: How to use i2s_read and i2s_write simultaneously?

Not sure if that will solve your issue, but why the vTaskDelay? The i2s_read is blocking, it will return data whenever it has some, and the vTaskDelay will lead to buffer overruns.

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