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by WiFive
Sat Jun 30, 2018 1:42 pm
Forum: General Discussion
Topic: Clock and power configuration docs
Replies: 3
Views: 194

Re: Clock and power configuration docs

No that line comes from xtl_clk and is a fixed div/4
by WiFive
Fri Jun 29, 2018 11:07 pm
Forum: ESP32 IDF
Topic: ESP-NOW: What happens if all peers are given the same MAC address?
Replies: 6
Views: 251

Re: ESP-NOW: What happens if all peers are given the same MAC address?

Broadcasts are not encrypted and devices don't have to use same PMK to communicate?
by WiFive
Fri Jun 29, 2018 8:15 pm
Forum: General Discussion
Topic: nghttp2 help request
Replies: 2
Views: 134

Re: nghttp2 help request

by WiFive
Fri Jun 29, 2018 6:30 pm
Forum: ESP32 IDF
Topic: ESP-NOW: What happens if all peers are given the same MAC address?
Replies: 6
Views: 251

Re: ESP-NOW: What happens if all peers are given the same MAC address?

What is length difference for unicast and broadcast packets?
by WiFive
Fri Jun 29, 2018 3:33 am
Forum: General Discussion
Topic: ESP32 Web Server - Advanced Web Pages?
Replies: 4
Views: 276

Re: ESP32 Web Server - Advanced Web Pages?

Sure, assuming it is all client side rendering. You can even use hosted assets from cdn if you don't want to serve them from the esp32.
by WiFive
Thu Jun 28, 2018 11:34 pm
Forum: ESP32 IDF
Topic: Timer interrupt and reading/writing flash memory causes a crash
Replies: 3
Views: 148

Re: Timer interrupt and reading/writing flash memory causes a crash

He doesn't want to do an interrupt during a flash operation, he wants to do a flash operation during an interrupt.

Even if timerAttachInterrupt didn't set the iram flag calling nvs functions from an interrupt is no bueno.
by WiFive
Thu Jun 28, 2018 10:46 pm
Forum: General Discussion
Topic: Caching issues with mmap'ed flash
Replies: 6
Views: 207

Re: Caching issues with mmap'ed flash

I believe those should only be called inside flash guarded section.
by WiFive
Thu Jun 28, 2018 10:25 pm
Forum: General Discussion
Topic: Caching issues with mmap'ed flash
Replies: 6
Views: 207

Re: Caching issues with mmap'ed flash

Well spi_flash_write and spi_flash_erase will call spi_flash_mark_modified_region but it does not actually flush the cache until spi_flash_ensure_unmodified_region is called. So I don't know if there is a rule that you are supposed to unmap and remap memory if you are going to write/erase it.
by WiFive
Thu Jun 28, 2018 8:20 pm
Forum: General Discussion
Topic: Caching issues with mmap'ed flash
Replies: 6
Views: 207

Re: Caching issues with mmap'ed flash

It might be due to stale cache after erase if the cache is not automatically flushed.
by WiFive
Thu Jun 28, 2018 2:10 pm
Forum: General Discussion
Topic: Multiple Applications from SD card
Replies: 8
Views: 313

Re: Multiple Applications from SD card

https://github.com/tobozo/M5Stack-SD-Updater

Whether you can get the mmu to address a spiram on the instruction bus I don't know.

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