Search found 75 matches

by water
Sun May 08, 2022 7:03 pm
Forum: Other Boards
Topic: How to flash bootloader to ATSAMD board?
Replies: 2
Views: 1864

Re: How to flash bootloader to ATSAMD board?

Thanks, that works.
And I try flash Adafruit UF2 bootloader to 0x0000, then flash MicroPython .uf2 firmware seems fine.
by water
Fri May 06, 2022 8:03 pm
Forum: Other Boards
Topic: How to flash bootloader to ATSAMD board?
Replies: 2
Views: 1864

How to flash bootloader to ATSAMD board?

I want to flash MicroPython .uf2 firmware to ATSAMD board, is it have specific MicroPython version of bootloader? how? Or can I refer this: https://github.com/adafruit/uf2-samdx1/blob/master/bin-README.md To flash CircuitPython bootloader, then use the bootloader to flash MicroPython firmware? Or if...
by water
Sat Mar 26, 2022 3:32 pm
Forum: Other Boards
Topic: RTL8720DN for MicroPython?
Replies: 8
Views: 3064

Re: RTL8720DN for MicroPython?

RTL8720DN on Wio Terminal seems use as wireless connectivity co-processor, not running MicroPython.
by water
Sat Mar 26, 2022 12:43 pm
Forum: Other Boards
Topic: RTL8720DN for MicroPython?
Replies: 8
Views: 3064

Re: RTL8720DN for MicroPython?

I guess 16Mbit (not ensure), https://docs.ai-thinker.com/_media/bw16_kit_specification-2021-0730.pdf page 5 additional: https://files.seeedstudio.com/products/102110419/Basic%20documents/AN0400%20Ameba-D%20Application%20Note_v3_watermark.pdf page 83, 85, 88, 97. This is MicroPython implement on RTL8...
by water
Sat Mar 26, 2022 9:11 am
Forum: Other Boards
Topic: RTL8720DN for MicroPython?
Replies: 8
Views: 3064

Re: RTL8720DN for MicroPython?

ram_.jpg
ram_.jpg (40.43 KiB) Viewed 3017 times
flash_.jpg
flash_.jpg (17.56 KiB) Viewed 3017 times
That has 512KB SRAM (Optional 4MB PSRAM) for Cortex-M4F, QSPI flash (similar RP2040).

That support Arduino currently.
https://github.com/ambiot/ambd_arduino
by water
Fri Mar 25, 2022 3:53 pm
Forum: Other Boards
Topic: RTL8720DN for MicroPython?
Replies: 8
Views: 3064

RTL8720DN for MicroPython?

https://www.aliexpress.com/item/1005001320366011.html?spm=a2g0o.productlist.0.0.73e81d61Sbqob2&algo_pvid=49d8ecab-cb54-4fbc-ab95-e2e821f38be9&algo_exp_id=49d8ecab-cb54-4fbc-ab95-e2e821f38be9-2&pdp_ext_f=%7B%22sku_id%22%3A%2212000021807046838%22%7D&pdp_pi=-1%3B5.3%3B-1%3B-1%40salePrice%3BUSD%3Bsearc...
by water
Tue Sep 07, 2021 9:25 pm
Forum: Other Boards
Topic: [ATSAMD] How to flash firmware to board?
Replies: 0
Views: 2523

[ATSAMD] How to flash firmware to board?

Board: 'ADAFRUIT_ITSYBITSY_M4_EXPRESS', or 'MINISAM_M4'

Way 1: firmware.bin, use J-Link SWD interface, which address should I flash the .bin firmware to board? I try flash it to 0x0, but can't boot correctly.
Way 2: firmware.uf2, how install uf2 bootloader to board?
by water
Thu Jul 15, 2021 2:15 pm
Forum: Other Boards
Topic: [Solved] How to setup ESP32-S2 build environment?
Replies: 2
Views: 4558

Re: [Solved] How to setup ESP32-S2 build environment?

Build ESP32-S2 required ESP-IDF version >= v4.3
by water
Thu Jul 01, 2021 6:51 pm
Forum: ESP32 boards
Topic: [SOLVED] Pin.PULL_UP not working?
Replies: 4
Views: 2468

Re: Pin.PULL_UP not working?

GPIO-34, GPIO-35, GPIO-36, GPIO-39 input only pins, These pins don’t have internal pull-ups or pull-down resistors.

Image

https://randomnerdtutorials.com/esp32-p ... nce-gpios/
by water
Tue Jun 29, 2021 8:29 pm
Forum: ESP32 boards
Topic: SDCard frequency configure on ESP32 using SPI interface.
Replies: 0
Views: 893

SDCard frequency configure on ESP32 using SPI interface.

I try to configure SDCard frequency (use SPI interface) and measure SPI2-SCK(GPIO-18) frequency via oscilloscope, results below: sd = SDCard(slot = 2, sck = Pin(18), miso = Pin(19), mosi = Pin(23), cs = Pin(15), freq = 20000000) 20MHz sd = SDCard(slot = 2, sck = Pin(18), miso = Pin(19), mosi = Pin(2...