Search found 85 matches

by michprev
Sun Nov 25, 2018 11:11 am
Forum: ESP32 IDF
Topic: SPI1 flash driver and DMA
Replies: 1
Views: 99

SPI1 flash driver and DMA

Can someone confirm that spi flash driver running on SPI1 never uses DMA?

Thank you.
by michprev
Sun Nov 25, 2018 8:43 am
Forum: Documentation
Topic: Document Requests
Replies: 46
Views: 23587

Re: Document Requests

https://docs.espressif.com/projects/esp ... own-issues
Half duplex mode is not compatible with DMA when both writing and reading phases exist.
What does it mean exactly? When SPI_DOUTDIN in SPI_USER_REG is set to zero this issue occurs?
by michprev
Sat Nov 24, 2018 9:47 pm
Forum: General Discussion
Topic: Gripes on ESP32/ESP-IDF
Replies: 42
Views: 3512

Re: Gripes on ESP32/ESP-IDF

https://github.com/espressif/esp-idf/issues/2738 Now take a look at this issue. It is present in v3.1 release even in master branch at the moment. Because of that assert SPI driver fails whenever trying to use it in DIO/QIO mode. Does it seem like a minor issue to you? This bug exists there over th...
by michprev
Sat Nov 24, 2018 3:58 pm
Forum: Documentation
Topic: Document Requests
Replies: 46
Views: 23587

Re: Document Requests

Setting SPI_CLKCNT_H too high in SPI_CLOCK_REG register makes in some cases (probably depending on SPI_CLKCNT_N) stop SPI working. This is not documented.
by michprev
Fri Nov 23, 2018 9:08 pm
Forum: General Discussion
Topic: Gripes on ESP32/ESP-IDF
Replies: 42
Views: 3512

Re: Gripes on ESP32/ESP-IDF

You don't seem to understand the core of this issue but that is OK, I just wanted to illustrate that even Espressif FreeRTOS implementation is not correct (in fact I am quite curious where the issue excatly is). I looked a little into your link and you code. I notice that in your UDP example is bind...
by michprev
Fri Nov 23, 2018 6:22 pm
Forum: General Discussion
Topic: Gripes on ESP32/ESP-IDF
Replies: 42
Views: 3512

Re: Gripes on ESP32/ESP-IDF

I have prototyped many things with it over this time, using uSD, SPI (peripherals and 5" TFT LCD's) & I2C extensively. Even adding Ethernet capability to it. I have not run into one issue with it. Then you are really a lucky man. While writing my own driver for SPI I have found several issues in ES...
by michprev
Fri Nov 23, 2018 6:06 pm
Forum: General Discussion
Topic: Gripes on ESP32/ESP-IDF
Replies: 42
Views: 3512

Re: Gripes on ESP32/ESP-IDF

Have you considered the possibility that the problem is at your side? Sure, I have. But then I looked at other manufacturers solution and I can clearly say that the problem is not only me. There are certainly bugs in esp-idf (as in any software), but from your posting one could conclude that it is ...
by michprev
Fri Nov 23, 2018 1:43 pm
Forum: General Discussion
Topic: Gripes on ESP32/ESP-IDF
Replies: 42
Views: 3512

Re: Gripes on ESP32/ESP-IDF

I think the ESP32 was the labrat or testbech for Espressif, to test FreeRTOS, dual cores, and external RAM, as well as new preripherals. There is a funny/ironic analogy between Espressif products and Windows versios: 8266 -> Windows 7: This actually worked, and kind of still used in many many place...
by michprev
Sun Nov 18, 2018 11:37 pm
Forum: General Discussion
Topic: Gripes on ESP32/ESP-IDF
Replies: 42
Views: 3512

Re: Gripes on ESP32/ESP-IDF

Again and again... Not only that your hardware is badly designed. You don't even know how to test it and how to write drivers for it. (And your docs are incomplete too) 2 years on the market and your SPI drivers are still not working. 2 years on the market and you still don't know about all HW issue...
by michprev
Sun Nov 18, 2018 9:22 pm
Forum: Documentation
Topic: Document Requests
Replies: 46
Views: 23587

Re: Document Requests

https://github.com/espressif/esp-idf/blob/960c240578d359a1c5cf8cb3cbd9ce3150d5a370/components/driver/spi_common.c#L382-L438 this is not documented And what does this mean? https://github.com/espressif/esp-idf/blob/960c240578d359a1c5cf8cb3cbd9ce3150d5a370/components/driver/spi_master.c#L843-L846 Is ...

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