Search found 31 matches

by jmattsson
Tue Jun 27, 2017 1:21 am
Forum: General Discussion
Topic: Minimum supply voltage?
Replies: 4
Views: 1412

Re: Minimum supply voltage?

No, it's not something we'd be comfortable making assumptions on based on tests across a small sample. We ended up not using the ESP32 in the end.
by jmattsson
Tue Jan 03, 2017 2:14 am
Forum: General Discussion
Topic: Minimum supply voltage?
Replies: 4
Views: 1412

Re: Minimum supply voltage?

Anyone? Bueller?
by jmattsson
Wed Dec 21, 2016 5:56 am
Forum: General Discussion
Topic: Minimum supply voltage?
Replies: 4
Views: 1412

Minimum supply voltage?

We would like to run ESP32 modules on a 2.4-2.7V supply. The ESP32 data sheet's pin list mentions that the chip itself can work down to 2.3V, the Espressif website claims 2.2V in the chip overview, and a post by John Lee here earlier suggested it was actually down to 2.0V. However, the data sheet's ...
by jmattsson
Tue Dec 06, 2016 2:56 am
Forum: ESP32 SDK
Topic: Cannot Start Task in ISR
Replies: 6
Views: 1432

Re: Cannot Start Task in ISR

Nope, no need from my direction. It was a point of curiosity since our (NodeMCU) event post function most certainly is used from ISRs (and uses the ...FromISR() versions).
by jmattsson
Tue Dec 06, 2016 12:04 am
Forum: ESP32 SDK
Topic: Cannot Start Task in ISR
Replies: 6
Views: 1432

Re: Cannot Start Task in ISR

@ESP_Sprite On that note, I saw that the default implementation of esp_event_send() uses xQueueSendToBack() rather than xQueueSendToBackFromISR(). Does that imply that esp_event_send() should never be called from an ISR, or are the queues safe regardless?
by jmattsson
Mon Dec 05, 2016 4:16 am
Forum: News
Topic: ESP-IDF 1.0 Release plan
Replies: 60
Views: 20692

Re: ESP-IDF 1.0 Release plan

<3
by jmattsson
Mon Dec 05, 2016 1:50 am
Forum: News
Topic: ESP-IDF 1.0 Release plan
Replies: 60
Views: 20692

Re: ESP-IDF 1.0 Release plan

@ESP_iggr Regarding the interrupt allocation, I would much prefer to have you get that into master sooner rather than later, regardless of whether it's 1.0 compatible. My alternative is pretty much rolling my own and ignoring whatever you might actually provide later, because by then it'll be too mu...
by jmattsson
Fri Nov 18, 2016 12:56 am
Forum: Report Bugs
Topic: [solved] ets_printf ("\n"); printf("\n"); ets_printf("\r"); printf("\r");
Replies: 2
Views: 1275

Re: ets_printf ("\n"); printf("\n"); ets_printf("\r"); printf("\r");

You'll want to use regular printf, not ets_printf, and:

Code: Select all

make menuconfig
...
Component config -> ESP32-specific config ->  Standard-out output adds carriage return before newline
by jmattsson
Wed Oct 05, 2016 3:42 am
Forum: ESP32 SDK
Topic: [Solved] Reading character input from the serial port
Replies: 8
Views: 4010

Re: [Solved] Reading character input from the serial port

Whoops... indeed that was for debugging. Thanks for pointing it out - I had it on my todo list to work out why Esplorer wasn't happy loading the file list but now I know :)
by jmattsson
Wed Oct 05, 2016 2:35 am
Forum: ESP32 SDK
Topic: [Answered] Assembler language reference manual ...
Replies: 12
Views: 7704

Re: Assembler language reference manual ...

Not quite what you asked for, but you can find the overall Xtensa Instruction Set Architecture (ISA) Reference Manual document e.g. here . It's not specific to the 108s that you'll find in the ESP32, but between the ISA doc and the components/esp32/include/xtensa/config/core-isa.h header you can pre...