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by squonk11
Sun Dec 30, 2018 10:09 am
Forum: ESP-IDF
Topic: SPI slave design flaw
Replies: 2
Views: 1457

SPI slave design flaw

In the online documentation of the ESP32 I found a warning concerning the use of the SPI interface as slave: Warning: Due to a design peculiarity in the ESP32, if the amount of bytes sent by the master or the length of the transmission queues in the slave driver, in bytes, is not both larger than ei...
by squonk11
Sat Dec 29, 2018 6:50 pm
Forum: General Discussion
Topic: MSYS2 is slow on Windows 10
Replies: 30
Views: 18487

Re: MSYS2 is slow on Windows 10

Since compilation in windows was too slow I also installed the Windows Subsystem for Linux (WSL). This works really fast. Thank you for the hint so far. But I am having a problem: when I invoke the terminal via "make monitor" I can not exit the terminal using the key "Ctrl+]". How can I accomplish t...
by squonk11
Tue Jul 17, 2018 7:30 pm
Forum: General Discussion
Topic: OpenSSL vs mBedTLS
Replies: 5
Views: 6617

Re: OpenSSL vs mBedTLS

nice answer from ESP_Angus - but why there is no https_mbedtls server example? If mbedtls is the library to prefer I would expect that there are more and better examples...
by squonk11
Tue Jul 17, 2018 4:00 pm
Forum: ESP-IDF
Topic: is sdmmc driver reentrant?
Replies: 3
Views: 1683

Re: is sdmmc driver reentrant?

thank you for your fast answer.
yes, I will be using FAT filesystem with the in esp-idf provided C library. The webpages of course will only be read; so, a simultaneous read of the same file from two different tasks needs to be possible. I guess your answer gives green light for this approach, right?
by squonk11
Mon Jul 16, 2018 2:23 pm
Forum: ESP-IDF
Topic: is sdmmc driver reentrant?
Replies: 3
Views: 1683

is sdmmc driver reentrant?

I am trying to implement a webserver which serves the webpages stored on an SD card. It also should be able to serve more than one simultaneous connection. For this the esp-idf driver for the SD card needs to be reentrant. Is this the case?
by squonk11
Thu Feb 15, 2018 1:33 pm
Forum: General Discussion
Topic: SPP profile in bluedroid missing?
Replies: 25
Views: 17076

Re: SPP profile in bluedroid missing?

Now I saw that there is a bt_spp_acceptor and bt_spp_initiator example available. This seems to be the "missing" BT-classic SPP profile. Has anybody tested it?
by squonk11
Fri Jan 12, 2018 7:28 am
Forum: ESP-IDF
Topic: _WindowOverflow4 during startup
Replies: 1
Views: 3845

_WindowOverflow4 during startup

My current SW compiles o.k. but during startup of the µC I receive strange messages (in yellow): 0x40080000: _WindowOverflow4 at E:/msys32/opt/esp/esp-idf/components/freertos/xtensa_vectors.S:1685 and 0x400d0018: _flash_cache_start at ??:? and 0x4008bfa4: bb_init at ??:? Do I need to worry about the...
by squonk11
Sun Dec 24, 2017 3:00 pm
Forum: General Discussion
Topic: SPP profile in bluedroid missing?
Replies: 25
Views: 17076

Re: SPP profile in bluedroid missing?

now I fixed my problem: it was related to a race condition between incoming and outgoing telegrams. Now btStack works. Unfortunately even after tuning everything the the BT communication is much slower than the direct serial communication (approx. factor 2).
@loboris: Thanks for your support.
by squonk11
Sat Dec 23, 2017 11:42 pm
Forum: General Discussion
Topic: SPP profile in bluedroid missing?
Replies: 25
Views: 17076

Re: SPP profile in bluedroid missing?

now I also changed hci_dump.c and now there is no logging any more. But my problem remains the same: the communication is too slow. Can you check how fast you can exchange data?
by squonk11
Sat Dec 23, 2017 8:33 pm
Forum: General Discussion
Topic: SPP profile in bluedroid missing?
Replies: 25
Views: 17076

Re: SPP profile in bluedroid missing?

using esp_log_level_set("[BT_STACK]", 3); you can only switch off logging of the esp-idf functions. The btstack still logs many data: I (114548) PacketHandler: spp_send_packet() D (114549) SendPacket: begin [00:01:54.549] ACL => 80 00 19 00 15 00 41 00 09 EF 20 00 41 02 30 30 30 31 32 3 0 35 36 2E 3...

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