Search found 16 matches

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: 563

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: 563

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: 2151

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: 2151

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: 2151

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: 39
Views: 10459

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: 39
Views: 10459

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: 1393

Re: File System

For the record. This has been fixed in 33b8b78.
by Olof Astrand
Mon May 08, 2017 10:10 am
Forum: General Discussion
Topic: New LIbrary vfs_fat_spiflash not working
Replies: 8
Views: 1663

Re: New LIbrary vfs_fat_spiflash not working

For the record. It was an error in QEMU, now it works fine. You can also mount the FAT image, mkdir fat_partition sudo mount -o loop,offset=0x110000 esp32flash.bin fat_partition ls fat_partition ????? hello.txt However reading the file did not work. od -h fat_partition/hello.txt 0000000 0000 0000 00...
by Olof Astrand
Fri May 05, 2017 1:23 pm
Forum: General Discussion
Topic: New LIbrary vfs_fat_spiflash not working
Replies: 8
Views: 1663

Re: New LIbrary vfs_fat_spiflash not working

I tried the new esp-idf, formatting the disk seems to work OK but it fails on fopen() vfs_fat_open: fresult=13 Only tested in qemu so I think the error is in qemu . Here is the MBR from the qemu-flash, 00111000: ebfe 904d 5344 4f53 352e 3000 1001 0100 ...MSDOS5.0..... 00111010: 0100 02fa 00f8 0100 3...