Search found 261 matches

by jcsbanks
Fri Aug 16, 2019 8:30 am
Forum: ESP32 IDF
Topic: esp_timer_start_once - LoadProhibited on the second timer_armed call 1 in a million times
Replies: 2
Views: 161

Re: esp_timer_start_once - LoadProhibited on the second timer_armed call 1 in a million times

Thanks ESP_Angus. I had solved it by deleting and making a new timer instead of reusing it. Whilst this seems wasteful it meant that fewer critical sections and rechecks were needed in between timer alarm and start once and so far it is working well with heavy testing. Your input was useful to under...
by jcsbanks
Tue Aug 06, 2019 8:18 pm
Forum: ESP32 IDF
Topic: Persistent RAM disk
Replies: 10
Views: 431

Re: Persistent RAM disk

Bear in mind that writing to flash is slow, and FATFS is slow to read and write. PSRAM is mega fast in comparison.
by jcsbanks
Sat Aug 03, 2019 2:16 pm
Forum: General Discussion
Topic: OTA update without internet/WiFi network
Replies: 7
Views: 1086

Re: OTA update without internet/WiFi network

Very nice work username. OTA_update_posthandler() works nicely. Thanks!
by jcsbanks
Wed Jul 31, 2019 9:57 am
Forum: ESP32 IDF
Topic: Change memory allocating behavior for a certain component (C++)
Replies: 4
Views: 272

Re: Change memory allocating behavior for a certain component (C++)

Not a direct solution, but sharing an experience that may help, or maybe you've covered all this and more already... I'm using heap in PSRAM with std::map and std::vector, but had some issues with std::vector where even after erase() the memory was still reserved on the heap. C++ 11 shrink_to_fit di...
by jcsbanks
Tue Jul 30, 2019 6:35 pm
Forum: ESP32 IDF
Topic: esp_timer_start_once - LoadProhibited on the second timer_armed call 1 in a million times
Replies: 2
Views: 161

esp_timer_start_once - LoadProhibited on the second timer_armed call 1 in a million times

Guru Meditation Error: Core 0 panic'ed (LoadProhibited). Exception was unhandled. Core 0 register dump: PC : 0x40089a1b PS : 0x00060130 A0 : 0x80081ee3 A1 : 0x3ffaf950 0x40089a1b: timer_armed at C:/msys32/home/jcsba/esp/esp-idf/components/esp32/esp_timer.c:443 A2 : 0x00000000 A3 : 0x000007e0 A4 : 0...
by jcsbanks
Fri Jul 26, 2019 2:38 pm
Forum: ESP32 IDF
Topic: Change timeout of netconn connection - reads back correct value but timeout is still as originally set
Replies: 0
Views: 80

Change timeout of netconn connection - reads back correct value but timeout is still as originally set

I normally have a 10s timeout on a netconn that I use for a websocket that serves a javascript browser app. This is good because when a client disconnects disgracefully, the connection is reset and another client can connect (such as when changing between AP and STA, or between devices). However, wh...
by jcsbanks
Fri Jul 26, 2019 10:22 am
Forum: General Discussion
Topic: [NEWS] Espressif initial public offerings of stock IPO 688018
Replies: 9
Views: 972

Re: [NEWS] Espressif initial public offerings of stock IPO 688018

Fantastic news and something like $1 billion added to the market cap this week if I understand correctly. Espressif deserve every bit of their success. Wonderful company in terms of product, support, including fixing in a really honourable way went things went wrong, which was really appreciated and...
by jcsbanks
Thu Jul 25, 2019 1:19 pm
Forum: General Discussion
Topic: Question to people wanting CanBus in the next chip version
Replies: 11
Views: 747

Re: Question to people wanting CanBus in the next chip version

Existing systems in cars. I would not use CAN for a fully owned system as it is neither fast or cheap. Ethernet is so well supported generally with commodity hardware. Some new BMWs now have in the teens of ethernet nodes, but apart from between the gateway and OBD port it is 2 wire 100Mbps develope...
by jcsbanks
Tue Jul 23, 2019 8:55 am
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 302
Views: 84939

Re: What would you like to see in The Next Chip?

S2 improvements to the dual core ESP32 whilst retaining CAN would be awesome. I don't want an SPI CAN controller for size and latency, the ESP32 is awesome for CAN.

The main S2 improvements I want are the ability to address larger flash and PSRAM.
by jcsbanks
Sat Jul 20, 2019 9:35 am
Forum: General Discussion
Topic: Very large buffer on ESP32
Replies: 5
Views: 338

Re: Very large buffer on ESP32

How about adding PSRAM?

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