Search found 320 matches

by loboris
Fri Nov 16, 2018 3:07 pm
Forum: Other Boards
Topic: New dual-core RISC-V 64bit board
Replies: 16
Views: 4956

Re: New dual-core RISC-V 64bit board

Your allowance is less than $5? :D I don't quite understand the point. BTW, Fun Fact: The board with WiFi contains an ESP8285, so you could in fact run TWO MicroPython instances on one board. Fun aside, it wouldn't be too useful to run MicroPython on ESP8285, but it could be interesting (and maybe ...
by loboris
Thu Nov 15, 2018 11:31 pm
Forum: Other Boards
Topic: New dual-core RISC-V 64bit board
Replies: 16
Views: 4956

Re: New dual-core RISC-V 64bit

Interesting discussion with some useful links on HACKADAY
by loboris
Thu Nov 15, 2018 8:17 pm
Forum: Other Boards
Topic: New dual-core RISC-V 64bit board
Replies: 16
Views: 4956

New dual-core RISC-V 64bit board

A new dual-core RISC-V 64bit board, Sipeed MAIX, just apeared on the Indiegogo campain . Sipeed MAIX is the first RV64 AI board for Edge Computing, it makes AI embeded to any IoT device possible. MAIX have tons of excited features: DualCore RV64 IMAFDC, 8MB SRAM, Neural Network Processor(0.25~0.5TOP...
by loboris
Thu Nov 15, 2018 9:20 am
Forum: General Discussion and Questions
Topic: New cheap OLED screen
Replies: 9
Views: 1961

Re: New cheap OLED screen

Chinese sellers often writes nonsense descriptions "IPS HD TFT ... LCD OLED Display" intentionally, to be found by search engines...
by loboris
Mon Nov 12, 2018 11:20 am
Forum: ESP32 boards
Topic: Difference between SRAM & SPIRAM
Replies: 13
Views: 5919

Re: Difference between SRAM & SPIRAM

For all practical usage (especially in an environment such as MicroPython) there is almost no difference between using internal RAM and external SPI-RAM. Main reason for that is the fact that the ESP32 code is executed from Flash which is an external, SPI connected, device. Flash read operations are...
by loboris
Sun Nov 11, 2018 7:34 pm
Forum: ESP32 boards
Topic: Difference between SRAM & SPIRAM
Replies: 13
Views: 5919

Re: Difference between SRAM & SPIRAM

SPIRAM is much slower. Waayyyyyyyy slower. It is slower, but... Theoretical SPI-RAM access speed is ~40MB/s. In final application, for example in MicroPython firmware, SPI-RAM access speed is is ~14 MB/sec. The access is cached in internal RAM buffer (same as Flash access) and practical results sho...
by loboris
Sun Nov 11, 2018 5:10 pm
Forum: ESP32 boards
Topic: Difference between SRAM & SPIRAM
Replies: 13
Views: 5919

Re: Difference between SRAM & SPIRAM

ESP-IDF Programming Guide : The ESP32 has a few hundred KiB of internal RAM, residing on the same die as the rest of the ESP32. For some purposes, this is insufficient, and therefore the ESP32 incorporates the ability to also use up to 4MiB of external SPI RAM memory as memory. The external memory ...
by loboris
Sat Nov 10, 2018 8:43 am
Forum: ESP32 boards
Topic: ESP32-CAM 101
Replies: 5
Views: 5345

Re: ESP32-CAM 101

I connected UART wires to ESP32-CAM with following pins Red: VCC Green: U0T White : U0R Black: GND But I don't see ESP32-CAM getting detected on mac. What is required here ? If you are using the USBtoSERIAL cable like this one , green is TxD and has to be connected to U0R , white is RxD and must be...
by loboris
Wed Nov 07, 2018 4:16 pm
Forum: General Discussion and Questions
Topic: ffi module Micropython ESP32
Replies: 4
Views: 1202

Re: ffi module Micropython ESP32

I'm finishing the usqlite3 module implementation for my MicroPython port, based on this library.
It works great, I expect to commit it next week.
by loboris
Wed Nov 07, 2018 9:39 am
Forum: General Discussion and Questions
Topic: How to communicate with 40 bit SPI
Replies: 4
Views: 838

Re: How to communicate with 40 bit SPI

Pack your regaddr and data to one 5-byte bytearray and send it in one SPI transaction.