Search found 57 matches

by squonk11
Wed Mar 06, 2019 9:34 pm
Forum: General Discussion
Topic: SPP profile in bluedroid missing?
Replies: 25
Views: 9707

Re: SPP profile in bluedroid missing?

@loboris: how did you make it work? I am trying to use it but I am getting a system crash after approx. 2 minutes; see here: https://www.esp32.com/viewtopic.php?f=1 ... 742#p39742
by squonk11
Wed Mar 06, 2019 9:31 pm
Forum: ESP32 IDF
Topic: Bluetooth SPP profile fails after some time
Replies: 1
Views: 378

Re: Bluetooth SPP profile fails after some time

Does nobody have an idea how to solve this issue?
by squonk11
Mon Mar 04, 2019 8:00 pm
Forum: ESP32 IDF
Topic: Bluetooth SPP profile fails after some time
Replies: 1
Views: 378

Bluetooth SPP profile fails after some time

I am trying to set up a simple bluetooth SPP profile communication with an industrial device via a serial interface. For this I am basically using the example from the BT-SPP-ACCEPTOR demo. Using this I am transferring short data frames in an inquiry and reply manner. Initially this works but after ...
by squonk11
Fri Feb 22, 2019 6:11 pm
Forum: ESP32 IDF
Topic: Error on secondary bluetooth connection
Replies: 2
Views: 656

Re: Error on secondary bluetooth connection

I am getting the error message "BT_OSI: alarm_set failed to start timer, err 0x103" also when using only one client. Did you find a solution for this problem?
by squonk11
Thu Jan 24, 2019 5:09 pm
Forum: General Discussion
Topic: [SPI] how to stop using DMA
Replies: 8
Views: 1307

Re: [SPI] how to stop using DMA

Thank you for providing the link to your code. Are you able to read also more than 64 bytes (e.g. 113 bytes) with your driver without loosing some bytes? As far as I understood the esp-idf driver it is possible to read an arbitrary number of bytes between 1 and 64 bytes without DMA (just using the i...
by squonk11
Sun Jan 20, 2019 12:54 pm
Forum: Hardware
Topic: SPI slave driver, last 4 Bytes missing (using DMA)
Replies: 15
Views: 2692

Re: SPI slave driver, last 4 Bytes missing (using DMA)

@ESP_sprite : Is there a schedule when the new silicon is available? Will it be just a new step of the ESP32 or will it be a feature enhanced version of the ESP32?
by squonk11
Thu Jan 17, 2019 5:02 pm
Forum: Hardware
Topic: SPI slave driver, last 4 Bytes missing (using DMA)
Replies: 15
Views: 2692

Re: SPI slave driver, last 4 Bytes missing (using DMA)

@ESP_sprite : do you know if there will be a new silicon version of the ESP32 with this issue fixed or at least a workaround in ESP-IDF? If not I will need to switch to a different chip because a SPI slave interface suitable for an arbitrary number of incoming data bytes is mandatory for my project.
by squonk11
Thu Jan 17, 2019 4:57 pm
Forum: ESP32 IDF
Topic: Compilation problem with CMake build system under Windows 7
Replies: 7
Views: 921

Re: Compilation problem with CMake build system under Windows 7

A re-installation of Python27 and the whole tool-chain did the job. Thank you for your support.
by squonk11
Mon Jan 14, 2019 12:21 pm
Forum: Hardware
Topic: SPI slave driver, last 4 Bytes missing (using DMA)
Replies: 15
Views: 2692

Re: SPI slave driver, last 4 Bytes missing (using DMA)

The non-DMA mode (just using the internal buffer of the ESP32) unfortunately is not a solution for me because I need to receive up to 114 bytes and the internal buffer of the ESP32 is only 32 bytes. I am wondering if it might be possible to activate an interrupt instead of a DMA transaction. In orde...
by squonk11
Sun Jan 13, 2019 12:59 pm
Forum: Hardware
Topic: SPI slave driver, last 4 Bytes missing (using DMA)
Replies: 15
Views: 2692

Re: SPI slave driver, last 4 Bytes missing (using DMA)

The information about the amount of transfered bytes from the master is stored in the second byte of the transferred telegram. In order to read this I need to receive the first two bytes separately (or byte by byte). Is there any possibility to achieve that? Even if that needs to be done by polling?

Go to advanced search