1 Topic by angellee200 (edited by angellee200 05-09-2023 12:28:06)

  • angellee200
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Topic: Faster CAN scan

Hi Canny Team,

  I have been using the CAN scanning(switching) method converting all the digital signal(ON/OFF) onto CAN (Please see attached program), needing to get the shift pedal in more respond manner, so tried to increase the PWM to get the "faster switching" , I may not doing it right, can someone shred some light on scanning the input in faster rate , there are two input I need it in priorities, they are the shifter for the transmission ( CAN BUS) to receive. Thank you in advance.

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Attachment icon INPUT controller.cfd 9.74 kb, 47 downloads since 2023-09-05 

2 Reply by angellee200

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Re: Faster CAN scan

Anyone?  The current behavior is that the delay whenever a button is pressed, let say a brake switch physically pressed, it is delayed for maybe 500ms-1000ms , I was hoping to have a faster response, should I use other method to transmit ON/OFF state onto the CAN network? shred some light please. thanx

3 Reply by Konstantin, CANNY logic

  • Konstantin, CANNY logic
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Re: Faster CAN scan

I'm on my way!
First of all, "Default positive input" implies debouncing delays of 200 ms:  https://cannylogic.com/docs/c7/io/#sec- … input_mode
Just use advanced mode constants here.

Also, you can use shorter PWM generator #11 Period value

Please see attachment.

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Attachment icon INPUT controller_1.cfd 9.86 kb, 47 downloads since 2023-09-06 

Konstantin, CANNY logic's Website

4 Reply by angellee200 (edited by angellee200 13-09-2023 06:12:22)

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Re: Faster CAN scan

Konstantin, you are the man , thank you very much.

I hope the next persons who is reading this found it useful, I will be on here more often as I want to be part of the community to help!

Thank you again!

5 Reply by Konstantin, CANNY logic

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Re: Faster CAN scan

You are welcome!
Of course, this is all part of the product knowledge base and is very valuable.
It will be livelier here, somewhen, I hope so.
Thanks for your intent to help!

Konstantin, CANNY logic's Website

6 Reply by angellee200 (edited by angellee200 09-09-2023 23:19:50)

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Re: Faster CAN scan

I want to follow up with this post. After I increase the scan time to advance setting(20ms) per Konstantin suggested, the "scanning" speed had been more responsive, I also added a Rising edge detector and the off button delay turning off to 150-180ms  , so far the up shift and downshift button are very responsive and it catches every time I press the button, these devices are very capable and very potential for project like this.

7 Reply by Konstantin, CANNY logic

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Re: Faster CAN scan

Thanks for your following up! It's inspiring!

Konstantin, CANNY logic's Website