Search found 20 matches

by scardig
Mon Apr 23, 2018 8:33 am
Forum: MicroPython pyboard
Topic: Interrupt and ADC
Replies: 3
Views: 1089

Interrupt and ADC

Hello, here is a code snippet to achieve the following: 1. Read 10 digital values on X1,X2,X3,X4,X5,X6 at 5 Hz 2. Perform a "calculation" on such values 3. goto 1 Do you find it correct ? import array import utime, time import micropython micropython.alloc_emergency_exception_buf(100) NSAMPLES = 10 ...
by scardig
Mon Feb 05, 2018 4:17 pm
Forum: MicroPython pyboard
Topic: Pyboard debugging while embedded: powering
Replies: 3
Views: 914

Re: Pyboard debugging while embedded: powering

If you had a USB->UART module like a CP2102 or FTDI, isn't it possible just to connect common GND and RX/TX? Then you can monitor without having to wire through the Micro USB port (and therefore avoid automatically joining V+ to your laptop). You're right but I will "waste" two pins on the pyboard ...
by scardig
Mon Feb 05, 2018 3:34 pm
Forum: MicroPython pyboard
Topic: Pyboard debugging while embedded: powering
Replies: 3
Views: 914

Pyboard debugging while embedded: powering

Hello, we have to embed a pyboard into a dedicated board that will feed power to the V+,GND pins of the Pyboard. With the Pyboard powered in such way, I may need to hot-connect via USB to see what's going on from my PC via Putty (and eventually update my Python code) then reset and hot-disconnect wh...
by scardig
Fri Jan 26, 2018 10:27 am
Forum: MicroPython pyboard
Topic: Infrared communications between 2 Pyboard
Replies: 6
Views: 4069

Re: Infrared communications between 2 Pyboard

I think that's right. ok. In the docs I read: "Each channel can be configured to perform pwm, output compare, or input capture. All channels share the same underlying timer, which means that they share the same timer clock." So may I use UART2 on (X3,X4) and, at the same time, generate a PWM at 153...
by scardig
Thu Jan 25, 2018 9:41 am
Forum: MicroPython pyboard
Topic: Infrared communications between 2 Pyboard
Replies: 6
Views: 4069

Re: Infrared communications between 2 Pyboard

pythoncoder wrote:
Tue Jan 23, 2018 5:16 pm
The Pyboard can do that using one of the onboard timers.
So, for example:

from pyb import Pin, Timer

p = Pin('X1')
tim = Timer(2, freq=153600)
ch = tim.channel(1, Timer.PWM, pin=p)

It results in:

>>> tim.freq()
153846.2

Am I on the right way ?

Thanx

Thanx
by scardig
Tue Jan 23, 2018 3:56 pm
Forum: MicroPython pyboard
Topic: Infrared communications between 2 Pyboard
Replies: 6
Views: 4069

Infrared communications between 2 Pyboard

Hello, We are asked to develope an infrared data link between 2 Pyboard and we think of using a Microchip MCP2122 + TFDU4101 as a solution. As per MCP2122 datasheet the baud rate is determined by the frequency of a 16XCLK signal such that, for a baudrate of 9600 bps, we need to feed the MCP2122 with...
by scardig
Thu Jan 11, 2018 10:43 am
Forum: MicroPython pyboard
Topic: Info about Pyboard v1.1 I/O
Replies: 7
Views: 1814

Re: Info about Pyboard v1.1 I/O

So, for example, would it be possible to use X1 X2 for UART, X3 as GPIO, X4 as GPIO, X5 as DAC , X6 as GPIO and X7 as ADC ? (to know if I can mix pins used for their special function and used as GPIOs even when they are placed in different columns in the drawing) Both look fine to me. All pins on th...
by scardig
Thu Jan 11, 2018 9:11 am
Forum: MicroPython pyboard
Topic: Info about Pyboard v1.1 I/O
Replies: 7
Views: 1814

Re: Info about Pyboard v1.1 I/O

Hello Peter,

thanx for the answer. Can you give me an opinion related to the pin configuration in the above post (CASE 1 and CASE 2) ?
pythoncoder wrote:
Thu Jan 11, 2018 5:44 am
Pins for hardware flow control are in the docs. I have successfully used this feature via the pyb library.
by scardig
Wed Jan 10, 2018 4:56 pm
Forum: MicroPython pyboard
Topic: Info about Pyboard v1.1 I/O
Replies: 7
Views: 1814

Re: Info about Pyboard v1.1 I/O

Thanx for the answer. Based on the above requisites, do you think that the following pin configuration is a viable choice: CASE 1 ===== 1x UART: Y9, Y10 (+ flow control Y6, Y7) 6x digital input: Y8, X9, X10, Y1, Y2, Y3 CASE 2 ===== 1x ADC : X1 1x UART: Y9, Y10 (+ flow control Y6, Y7) 3x digital inpu...
by scardig
Wed Jan 10, 2018 8:48 am
Forum: MicroPython pyboard
Topic: Info about Pyboard v1.1 I/O
Replies: 7
Views: 1814

Info about Pyboard v1.1 I/O

Hello, I'm asked to evaluate the Pyboard v1.1 as the controller board for a demo project. At the moment the main requirements are related to the I/O channels in two use cases: CASE 1: ===== 6x digital inputs, 1x UART (with RTS CTS flow control) CASE 2: ===== 1x ADC, 1x UART (with RTS CTS flow contro...