Search found 18 matches

by Olof Astrand
Thu Nov 07, 2019 2:41 pm
Forum: General Discussion
Topic: Adress 0x40060000-0x4006FFFF 64 KB Reserved adresses & ESP32-S2
Replies: 2
Views: 386

Re: Adress 0x40060000-0x4006FFFF 64 KB Reserved adresses & ESP32-S2

Hello again, I found part of the answer. 0x40062a6c is marked as reserved, but is most likely part of the rom and related to the spi_flash functions. https://github.com/pycom/esp-idf-2.0/blob/master/components/esp32/ld/esp32.rom.ld PROVIDE ( spi_flash_attach = 0x40062a6c ); void spi_flash_attach ( u...
by Olof Astrand
Thu Nov 07, 2019 11:53 am
Forum: General Discussion
Topic: Adress 0x40060000-0x4006FFFF 64 KB Reserved adresses & ESP32-S2
Replies: 2
Views: 386

Adress 0x40060000-0x4006FFFF 64 KB Reserved adresses & ESP32-S2

Hello, When running an esp32 application in qemu https://github.com/Ebiroll/qemu_esp32 I have noticed that it is not enough to dump only the official 384 KB of ROM as the ROM contains a call to adress 0x40062a6c which is contained in Reserved space. Does anyone have a hint to what is located here, s...
by Olof Astrand
Thu May 03, 2018 1:40 pm
Forum: Showcase
Topic: ARM single wire debug with black magic and the ESP32
Replies: 2
Views: 2147

Re: ARM single wire debug with black magic and the ESP32

Its almost complete, except for Jtag. You must use the SWD pins. 2 of them + ground. I am currently adding a web based log viewer/serial terminal. Wanted to use the SWO pin for that but will probably just use an extra UART instead. It seems easier to understand. I am amazed how well it works. It fee...
by Olof Astrand
Fri Apr 13, 2018 8:51 am
Forum: Showcase
Topic: ARM single wire debug with black magic and the ESP32
Replies: 2
Views: 2147

ARM single wire debug with black magic and the ESP32

If you are into ARM programming and your device has support for SWD you can now do it over wifi with the ESP32! https://github.com/Ebiroll/esp32_blackmagic I wanted to send it back as a pull request to, https://github.com/blacksphere/blackmagic but do not have the skills to fix the makefiles. This i...
by Olof Astrand
Wed Jan 31, 2018 9:36 am
Forum: Showcase
Topic: ESP32 as a logic analyzer.
Replies: 5
Views: 7573

Re: ESP32 as a logic analyzer.

Hi Olof, Is there a way to something else than the Wrover kit, so with something like the Devkit for example? I also saw on the Guthub, that the current sample rate is hard coded to 10kHz. For me it seems quite small, or maybe I'm missing something. Regards, Ben Hello, Sorry for the late reply. Yes...
by Olof Astrand
Thu Dec 21, 2017 10:19 am
Forum: Showcase
Topic: ESP32 as a logic analyzer.
Replies: 5
Views: 7573

Re: ESP32 as a logic analyzer.

Hello again. I did some more tests yesterday and it turns out that the reason why it was working so well was because I was using pin 12-15 on the WROVER-KIT. Sigrok was then able to use the JTAG, chip on the WROVER-KIT board for data acquisition. It was just a coincidence that I used these pins on t...
by Olof Astrand
Wed Dec 20, 2017 10:49 am
Forum: Showcase
Topic: ESP32 as a logic analyzer.
Replies: 5
Views: 7573

ESP32 as a logic analyzer.

By using sigrok and implementing the SUMP protocol over serial I was able to use the ESP32 as a logical analyzer. Quite a nice way to get a better understanding of the streams of bits running over the wires of the ESP32. https://en.wikipedia.org/wiki/Sigrok https://raw.githubusercontent.com/Ebiroll/...
by Olof Astrand
Tue Dec 05, 2017 1:59 pm
Forum: Showcase
Topic: I2S-parallel example: Drive a 64x32 display
Replies: 60
Views: 42485

Re: I2S-parallel example: Drive a 64x32 display

Thanks @rudi ;) I will get a 5V 4A supply. I ordered this LED panel https://www.aliexpress.com/item/P4-Indoor-RGB-Black-LED-SMD2121-64x32-Matrix-Full-Color-1-16scan-Module-for-HD-Indoor/32742067912.html?spm=a2g0s.9042311.0.0.c1pPY2 I also ordered this SALEAE clone https://www.aliexpress.com/item/New...
by Olof Astrand
Tue Dec 05, 2017 11:00 am
Forum: Showcase
Topic: I2S-parallel example: Drive a 64x32 display
Replies: 60
Views: 42485

Re: I2S-parallel example: Drive a 64x32 display

Hello Friends,
Really interesting application and example.
I just ordered a similar display from China.
It seems that you drive the display directly from the ESP32.
What Vcc-voltage for the display are you using 3.6V or 5.0V?
/Olof
by Olof Astrand
Mon May 08, 2017 10:13 am
Forum: General Discussion
Topic: File System
Replies: 5
Views: 2905

Re: File System

For the record. This has been fixed in 33b8b78.

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