Search found 601 matches

by OutoftheBOTS_
Wed Jul 03, 2019 8:35 pm
Forum: General Discussion and Questions
Topic: 3d printer firmware based on pyboard
Replies: 17
Views: 783

Re: 3d printer firmware based on pyboard

Even the DMA workaround on Linux systems isn't written in python but rather the underlying DMA functionality is written in C then wrapped up to be able to be called from python. Python is a high level language and much better than C for writing the high level application (wrapping low level function...
by OutoftheBOTS_
Thu Jun 27, 2019 9:18 pm
Forum: ESP8266 boards
Topic: Driver for NEMA 17 stepper motor ?
Replies: 15
Views: 456

Re: Driver for NEMA 17 stepper motor ?

You need to choose a stepper motor that will provide enough torque for the job that you will be using it for :) The link for the stepper motor didn't provide the max amps the motor is rated for so I googled the product number in the pic and found other sellers with more info like this 1 https://www....
by OutoftheBOTS_
Wed Jun 26, 2019 8:52 pm
Forum: ESP8266 boards
Topic: Driver for NEMA 17 stepper motor ?
Replies: 15
Views: 456

Re: Driver for NEMA 17 stepper motor ?

I play a bit with steppers. I find the "DRV885" you buy on ebay and aliexpress are clones and not the real Mccoy. In the Data sheet they should handle up to 2.5amps but I find if I use the cheap DRV8825 getting around the absolute max they will run at is 1.5amps before they start to miss steps due t...
by OutoftheBOTS_
Wed Jun 26, 2019 5:58 am
Forum: Other Boards
Topic: MCUDev Black STM32F407VET6 + STM32F407ZET6 dev boards
Replies: 105
Views: 35806

Re: Black STM32F407VET6 + STM32F407ZET6 dev boards

I guess I don't get it or I'm missing on something. The biggest issue I have seen with the "other" boards(not Pyboard, Maple, ESP, etc.) is the lack of tech support for them. Now grated some of the other boards quality is so-so(some Blue pills) but there are many that have very good build quality. ...
by OutoftheBOTS_
Mon Jun 24, 2019 7:37 am
Forum: Programs, Libraries and Tools
Topic: Convert Image To Pixel Array Function
Replies: 1
Views: 84

Re: Convert Image To Pixel Array Function

I have used both OpenMV cam and NodeMCU with Micro-Python. All RAM is linear so any array including 2d image array is stored in memory as linear bytes. You should be able to send the image from OpenMV straight to the UART without any formatting then have the NodeMCU forward it on to the web before f...
by OutoftheBOTS_
Sat Jun 22, 2019 10:10 pm
Forum: ESP32 boards
Topic: IRQ SPEED
Replies: 2
Views: 103

Re: IRQ SPEED

The STM32 MCUs of the PYBoard also have hardware encoder counters on their timers.
by OutoftheBOTS_
Tue Jun 18, 2019 9:41 pm
Forum: ESP8266 boards
Topic: How to communicate over 433mhz radio?
Replies: 3
Views: 185

Re: How to communicate over 433mhz radio?

Using radio link requires checking of data received is correct. A simple way to do this is use a checksum. Either way it will require a 2 way link so that the receiver can send back to the sender if the checksum added up correctly before the next packet of data is sent. The exact hardware used also ...
by OutoftheBOTS_
Sat Jun 15, 2019 8:25 pm
Forum: Other Boards
Topic: [Black STM32F407VET6] Pin map
Replies: 10
Views: 303

Re: [Black STM32F407VET6] Pin map

The TFT header is a copy of the needed pins on the side to use the 16bit parallel FSMC peripheral.

U can find the TFT pin-out here https://wiki.stm32duino.com/images/a/a8 ... AG-TFT.pdf

And here is a pic of the pins used but the MCU for the FSMC peripheral
fsmc.JPG
fsmc.JPG (75.62 KiB) Viewed 218 times
by OutoftheBOTS_
Thu Jun 13, 2019 8:05 pm
Forum: General Discussion and Questions
Topic: Serial - bit banging
Replies: 15
Views: 629

Re: Serial - bit banging

What is wrong with the code? How can I set the M bit in the UART control register Ok, I've found the mistake... d1 = u1.read(2) I need to read 2 chars to all 9 bits. ;-) But I still don't see the wakeup bit. How can i do it? Ok I have not yet ever needed to use 9 bit UART so had to do a bit of goog...
by OutoftheBOTS_
Sun Jun 09, 2019 9:23 pm
Forum: Other Boards
Topic: [TinyPICO/ESP32] TinyPICO is live and available for purchase!
Replies: 5
Views: 435

Re: [TinyPICO/ESP32] TinyPICO is live and available for purchase!

I see people have started to make add on boards for the tinypico, here's a VGA board https://www.youtube.com/watch?v=iGzUhgsmJL4