Search found 1494 matches

by ESP_Sprite
Thu Apr 19, 2018 1:55 am
Forum: General Discussion
Topic: esp32 jtag debug issue
Replies: 9
Views: 2138

Re: esp32 jtag debug issue

Are you sure you aren't reconfiguring (one of) the JTAG pins as normal GPIO or peripheral pins in your application?
by ESP_Sprite
Thu Apr 19, 2018 1:52 am
Forum: General Discussion
Topic: About the GPIO of ESP32
Replies: 1
Views: 52

Re: About the GPIO of ESP32

Because the flash chip is connected to these pins.
by ESP_Sprite
Wed Apr 18, 2018 3:22 pm
Forum: ESP32 SDK
Topic: error message ledc_isr_register()
Replies: 14
Views: 996

Re: error message ledc_isr_register()

Ah, I think I see what's happening. You also install an ISR for the fade function, which essentially hooks into the same ISR as you're trying to register yourself later. The ISR tries to hook into the same interrupt, assuming you're trying to explicitly build a shared interrupt, but as the fade serv...
by ESP_Sprite
Wed Apr 18, 2018 8:45 am
Forum: General Discussion
Topic: ADC speed?
Replies: 12
Views: 3877

Re: ADC speed?

There's no filter we put intentionally in the signal path. The bandwidth of the ADC just is more-or-less 6KHz if you want a linear frequency response.
by ESP_Sprite
Wed Apr 18, 2018 2:30 am
Forum: ESP32 SDK
Topic: error message ledc_isr_register()
Replies: 14
Views: 996

Re: error message ledc_isr_register()

That's curious; the only time it returns that is if the interrupt allocator is out of C-callable interrupt slots. Do you install ISRs for other peripherals? Also, if you uncomment the `//define DEBUG_INT_ALLOC_DECISIONS` line in esp-idf/components/esp32/intr_alloc.c and recompile, the interrupt allo...
by ESP_Sprite
Wed Apr 18, 2018 2:23 am
Forum: ESP32 SDK
Topic: ESP-NOW listen on one channel, send on another
Replies: 1
Views: 57

Re: ESP-NOW listen on one channel, send on another

It's technically possible to do what you write, but not what you intend :) I think espnow does allow associating with multiple peers on different channels. However, the ESP32 physically has only one radio, which can only be tuned to one frequency at a time. If your devices are 'quacking', it means b...
by ESP_Sprite
Wed Apr 18, 2018 2:18 am
Forum: General Discussion
Topic: ADC speed?
Replies: 12
Views: 3877

Re: ADC speed?

FWIW, as I understand it the 6KHz my colleague posted is an analog bandwith number. You can sample way faster than that, but we don't guarantee all frequencies will make it unattenuated into the digital samples.
by ESP_Sprite
Wed Apr 18, 2018 2:16 am
Forum: ESP32 Arduino
Topic: Arduino for ESP 32 Dev C board stopped working
Replies: 4
Views: 88

Re: Arduino for ESP 32 Dev C board stopped working

Moving this to the Arduino forum as this is an Arduino issue.
by ESP_Sprite
Tue Apr 17, 2018 9:38 am
Forum: ESP32 SDK
Topic: [FATFS] filename and extension not preserving case-sensitive style
Replies: 2
Views: 48

Re: [FATFS] filename and extension not preserving case-sensitive style

FAT filesystems always are case-insensitive, as far as I know. (See here, page 30: "All types of search operations within the file system (i.e. find, open, create, delete, rename) are case-insensitive.") I think Linux has a mode to mount it case-sensitively, but that's more-or-less a hack.
by ESP_Sprite
Tue Apr 17, 2018 6:24 am
Forum: ESP32 HDK
Topic: EMC test mode
Replies: 5
Views: 290

Re: EMC test mode

I can only suggest you to contact sales at espressif.com for this, as to my knowledge there's no one active on the forum that has influence over these manufacturing-related things.

Go to advanced search