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by sdmill
Tue Nov 26, 2019 4:18 pm
Forum: Device Tree
Topic: SC16IS752 overlay question
Replies: 3
Views: 658

Re: SC16IS752 overlay question

Hello, After making the change to config.txt, raspi-gpio get shows: GPIO 23: level=1 fsel=0 func=INPUT GPIO 24: level=1 fsel=0 func=INPUT No change to performance though. The overlay assigned 24 continues to Tx/Rx successfully while the other does not receive. I read through thread you provided, I d...
by sdmill
Mon Nov 18, 2019 10:59 pm
Forum: Device Tree
Topic: SC16IS752 overlay question
Replies: 3
Views: 658

SC16IS752 overlay question

Hello, New guy here and I apologize in advance if I'm breaking etiquette. I submitted this to a prior thread (https://www.raspberrypi.org/forums/viewtopic.php?f=107&t=235650&hilit=sc16is7xx&start=50), but this strikes me as a slightly different problem and so I'm starting a new one. My issue is rela...
by sdmill
Sat Nov 16, 2019 6:29 pm
Forum: Device Tree
Topic: How to use 2 SC16IS752,I USE I2C
Replies: 58
Views: 9408

Re: How to use 2 SC16IS752,I USE I2C

Aaand one last discovery, full functionality seems to follow which ever board is assigned int_pin=24.

I have tried assigning the int pin based on above posts and have tried 18 with no success. I’ve done a gpio readall to see other default low pins and have tried several with no change.
by sdmill
Sat Nov 16, 2019 3:48 am
Forum: Device Tree
Topic: How to use 2 SC16IS752,I USE I2C
Replies: 58
Views: 9408

Re: How to use 2 SC16IS752,I USE I2C

To amend my previous post, I identified a mistake I made creating the overlay assignments in the /boot/config.txt. I forgot the '=' in int_pin=XX. I've also determined that the lower board, 0x48, functions perfectly upon initial boot. It happens to be the lower board and I only took meter readings o...
by sdmill
Sat Nov 16, 2019 12:27 am
Forum: Device Tree
Topic: How to use 2 SC16IS752,I USE I2C
Replies: 58
Views: 9408

Re: How to use 2 SC16IS752,I USE I2C

Hello, My apologies for restarting this conversation - but as others have posted before me, I'm trying to utilize multiple of these Waveshare SC16IS752 cards for a project and am having some issues. What I have found so far, all done within this last week, is that if I start with updating Buster com...

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