Search found 510 matches

by loboris
Fri Feb 01, 2019 5:58 pm
Forum: ESP32 IDF
Topic: Wear Leveling File System with Directory Support
Replies: 6
Views: 490

Re: Wear Leveling File System with Directory Support

SPIFFS does not have directory support, but it can be easily implemented using SPIFFS metadata feature. I have SPIFFS with full directory support implemented in my MicroPython for ESP32 . LittleFS with full directory support is also implemented. It can be configured to run on top of Wear Leveling dr...
by loboris
Sat Jan 26, 2019 11:44 pm
Forum: ESP32 IDF
Topic: Control the Timing of CS line ESP32 SPI
Replies: 1
Views: 184

Re: Control the Timing of CS line ESP32 SPI

Configure SPI not to use hw CS. Then control the CS line from software...
by loboris
Fri Jan 25, 2019 7:51 pm
Forum: General Discussion
Topic: How to start external flash with SPI in esp32
Replies: 4
Views: 456

Re: How to start external flash with SPI in esp32

Yes, it should not be too difficult to adapt an existing SPI eeprom driver or write your own based on datasheet...
by loboris
Fri Jan 25, 2019 9:38 am
Forum: General Discussion
Topic: How to start external flash with SPI in esp32
Replies: 4
Views: 456

Re: How to start external flash with SPI in esp32

You are using the SPI Flash API for write/read, which is unrelated to the SPI Master API you have used to initialize the SPI bus.
You should write your own driver (or use an existing) to access the ST-25P80, which, BTW, is not a Flash chip, but SPI EEPROM.
by loboris
Tue Jan 15, 2019 8:53 pm
Forum: ESP32 IDF
Topic: SPI: received data shifted by 1bit right
Replies: 1
Views: 271

Re: SPI: received data shifted by 1bit right

Maybe you are using the wrong SPI mode. Try with mode 0.
by loboris
Mon Jan 14, 2019 10:47 am
Forum: General Discussion
Topic: running ESP32-D2WD at 240 MHz ??
Replies: 3
Views: 461

Re: running ESP32-D2WD at 240 MHz ??

Why not use ESP32-PICO-D4? It is only slightly larger (7x7mm), but you can save some space because of the components integrated on it.

ESP32 always executes code from SPI-Flash (some code is transfered to IRAM).
by loboris
Sat Jan 05, 2019 6:01 pm
Forum: Hardware
Topic: GPIO0 connected to GND makes the esp32 enter download mode
Replies: 2
Views: 449

Re: GPIO0 connected to GND makes the esp32 enter download mode

GPIO0 must be high on reset not to enter the bootloader mode, after booting you can use it as any GPIO.
Why is it held low and how is it driving SSR, via transistor or directly?
You should put a pull-up resistor on GPIO0 so that it is in high state during reset.
by loboris
Sun Dec 30, 2018 10:17 am
Forum: Hardware
Topic: ESP-Wroom-32 powering
Replies: 5
Views: 758

Re: ESP-Wroom-32 powering

You can start with a step-down module like this one.
I've used it and it works very good, I don't think you have to worry about noise emission.
Later, if you make your own PCB, you can integrate the circuit on it, the chip used is MP2315.

Image
by loboris
Sat Dec 29, 2018 12:55 am
Forum: Hardware
Topic: New board with WROVER doesn't produce WiFi network - is 16MB flash empty?
Replies: 4
Views: 549

Re: New board with WROVER doesn't produce WiFi network - is 16MB flash empty?

Not only it wouldn't make much sense selling the modules with some preprogrammed demo application (wich will be erased by the user anyway), the price (time) to flash the application on milions of modules would make them much more expensive.
by loboris
Fri Dec 28, 2018 9:23 pm
Forum: Hardware
Topic: ESP-Wroom-32 powering
Replies: 5
Views: 758

Re: ESP-Wroom-32 powering

Use switching instead of linear regulator :!:

You are building a commercial project and have to ask about how to power it !? :o

Go to advanced search