Search found 8917 matches

by ESP_Sprite
Sat Apr 02, 2022 1:39 am
Forum: General Discussion
Topic: Connecting multiple ESP32 | ESP-NOW | WiFi | RPi
Replies: 4
Views: 2961

Re: Connecting multiple ESP32 | ESP-NOW | WiFi | RPi

The thing with ESP32s only having one radio is true, indeed, and for some things like BT/BLE, coexistence means the radio needs to switch between BT and WiFi channels. However, WiFi and ESP-Now both use the same protocol, and if you use the same channel for both, there's no switching necessary.
by ESP_Sprite
Sat Apr 02, 2022 1:27 am
Forum: ESP-IDF
Topic: StoreProhibited error when equating two pointers
Replies: 3
Views: 1550

Re: StoreProhibited error when equating two pointers

My point is that you're allocating about 48K of RAM, which is a non-trivial amount. Malloc will fail if you do not have that amount of free RAM and will return a NULL pointer. That guru meditation has all the hallmarks of you trying to dereference a null pointer (specifically EXCVADDR: 0x00000000). ...
by ESP_Sprite
Sat Apr 02, 2022 1:21 am
Forum: General Discussion
Topic: Initial flash needed for download boot over internal USB?
Replies: 5
Views: 4315

Re: Initial flash needed for download boot over internal USB?

Yes, given that you put the chip into download mode by starting with GPIO0 low.
by ESP_Sprite
Fri Apr 01, 2022 2:58 pm
Forum: General Discussion
Topic: Initial flash needed for download boot over internal USB?
Replies: 5
Views: 4315

Re: Initial flash needed for download boot over internal USB?

Yes, you can; the ROM contains a driver that can flash the device over USB. You do need a way to be able to put it into download mode by grounding GPIO0, though.
by ESP_Sprite
Fri Apr 01, 2022 2:56 pm
Forum: General Discussion
Topic: Connecting multiple ESP32 | ESP-NOW | WiFi | RPi
Replies: 4
Views: 2961

Re: Connecting multiple ESP32 | ESP-NOW | WiFi | RPi

neross wrote:
Fri Apr 01, 2022 11:23 am
But this means that I would need to use both ESP-NOW, between the ESP32s, and WiFi to connect to the RPi, which is not really possible..
Where did you get that from?
by ESP_Sprite
Fri Apr 01, 2022 6:07 am
Forum: ESP-IDF
Topic: StoreProhibited error when equating two pointers
Replies: 3
Views: 1550

Re: StoreProhibited error when equating two pointers

You're very optimistically assuming your malloc() succeeds.
by ESP_Sprite
Fri Apr 01, 2022 1:35 am
Forum: Hardware
Topic: ADC ISR pinned in a specific core
Replies: 3
Views: 2065

Re: ADC ISR pinned in a specific core

The ADC actually does have multi-channel, DMA etc functionality, but the ESP32 uses the I2S peripheral to do that (essentially the ADC is seen as an I2S input that way). Later chips make the ADC a standalone peripheral. Suggest you look there, perhaps you'll find what you're looking for.
by ESP_Sprite
Fri Apr 01, 2022 1:26 am
Forum: General Discussion
Topic: Getting partition table error
Replies: 1
Views: 1168

Re: Getting partition table error

You have a partition table that has 6MiB worth of partitions, but your chip only seems to have 4MiB of flash.
by ESP_Sprite
Fri Apr 01, 2022 1:03 am
Forum: Hardware
Topic: ESP32-S2: fractional SPI byte in master mode: input not captured
Replies: 5
Views: 2349

Re: ESP32-S2: fractional SPI bits in master mode: input not captured

By the way, we would appreciate it if you could share a project with the minimum code to reproduce this issue, that way we know for sure we can reproduce this. If you can't do that, that's okay too, though, it doesn't look like this should be too hard to reproduce.