Search found 516 matches

by OutoftheBOTS_
Mon Jan 21, 2019 3:53 am
Forum: The MicroPython pyboard
Topic: ADC simultaneous sampling?
Replies: 9
Views: 360

Re: ADC simultaneous sampling?

It doesn't use DMA and (like read_timed ) is a blocking method. A nonblocking DMA equivalent would be great if someone has the skill to write it ;) I simply adapted the existing read_timed code. I am so bogged down at work (my real job that pays the bills) and also with too many projects currently ...
by OutoftheBOTS_
Sat Jan 19, 2019 8:43 pm
Forum: The MicroPython pyboard
Topic: ADC simultaneous sampling?
Replies: 9
Views: 360

Re: ADC simultaneous sampling?

You might consider the ADC.read_timed_multi method. This was intended for exactly this purpose, it produces good phase measurements at frequencies over 50KHz. The sampling isn't simultaneous but relative to 50Hz it's extremely close. STM32 does have a hardware injected peripheral that will read a n...
by OutoftheBOTS_
Wed Jan 16, 2019 7:43 am
Forum: Programs, Libraries and Tools
Topic: Dotstar (aka APA102) library
Replies: 8
Views: 552

Re: Dotstar (aka APA102) library

Thanks for testing this out! Really appreciate it. First thing to try would be to use hardware SPI if you're not already. I'll need to check the Huzzah32 pinout but some ESP32 pins can support much higher SPI transfer rates; APA102's should be capable of 10's of MHz (the ESP32 can transfer SPI at a...
by OutoftheBOTS_
Tue Jan 15, 2019 8:41 pm
Forum: Programs, Libraries and Tools
Topic: fast font rendering on graphical displays
Replies: 9
Views: 444

Re: fast font rendering on graphical displays

I may have some useful input to this discussion from my playing with SPI TFTs on Micropython. I played on both ESP8266 and ESP32 with psRAM. Graphics requires the most amount of RAM out of about anything you r likely to do in Micro-Python. I could use an approach on ESP32 that I couldn't use on ESP8...
by OutoftheBOTS_
Fri Jan 11, 2019 7:14 am
Forum: Hardware Projects
Topic: small form factor STMF407 board
Replies: 6
Views: 328

Re: small form factor STMF407 board

Not yet, at least... If you're after tiny boards for your robots, would one of those BetaFlight STM32F405 based flight controller boards be suitable? They don't seem to break out many pins, but are very light and compact and often have useful components like EEPROMs and gyros/accelerometers. What e...
by OutoftheBOTS_
Thu Jan 10, 2019 8:45 pm
Forum: Hardware Projects
Topic: small form factor STMF407 board
Replies: 6
Views: 328

Re: small form factor STMF407 board

Same seller has a STM32F429BIT6 board for ~$45. This board looks like it is setup for doing high speed graphics. It has a 40p connector for RGB screen and 16Mb of SDRAM all running on parallel connections. It also has 8Mb of SPI flash. I have never seen any of these features implemented in Micro-Py...
by OutoftheBOTS_
Thu Jan 10, 2019 8:33 pm
Forum: Hardware Projects
Topic: small form factor STMF407 board
Replies: 6
Views: 328

Re: small form factor STMF407 board

It’s very compact and one of the first I’ve seen with USB-C :) Only minor differences between the pyboard and VET6 defs. See: https://github.com/mcauser/VCC_GND_F407 https://github.com/mcauser/BLACK_F407VE The ZET6 is also similar: https://github.com/mcauser/BLACK_F407ZE And the ZGT6 too: https://g...
by OutoftheBOTS_
Tue Jan 08, 2019 8:51 pm
Forum: Hardware Projects
Topic: small form factor STMF407 board
Replies: 6
Views: 328

small form factor STMF407 board

I have found this board https://www.aliexpress.com/item/IRS2092-single-channel-amplifier-board-200W/32822107693.html It is a very small form factor STMF407VET6 with all the pins broken out and a sd card adapter with a high precision 25MHz crystal. I do believe there is aldready a potrt of Micro-Pyth...
by OutoftheBOTS_
Sat Jan 05, 2019 7:41 pm
Forum: The MicroPython pyboard
Topic: Control DC and Stepper Motors With L298N Dual Motor Controller Modules
Replies: 3
Views: 245

Re: Control DC and Stepper Motors With L298N Dual Motor Controller Modules

First it is important for me to understand what type and size of m otors your using. Are you driving stepper motors or DC motors and what are the voltage and amperage of the motors for me to know if a L9110 is suitable for your motors. Here's the hardware I use for small stepper motors https://www.a...
by OutoftheBOTS_
Mon Dec 31, 2018 12:05 pm
Forum: ESP32 boards
Topic: Lolin D32 Pro with an ST7735S 1.4 128x128 SPI TFT display
Replies: 3
Views: 657

Re: Lolin D32 Pro with an ST7735S 1.4 128x128 SPI TFT display

I use a ST7735 160x128 spi screen on Lobo port with his display module. see https://github.com/loboris/MicroPython_ESP32_psRAM_LoBo/wiki/display Although his display module does have a st7735 driver it didn't work with my screen so I uses dis custom setup and it work great here's my custom setup cod...